US20050240961A1

Movatterモバイル変換

Info

Publication number: US20050240961A1
Application number: US11/170,348
Authority: US
Inventors: Dean Jerding; Robert Banker; Arturo Rodriguez; Valerie Gutknecht; Shashi Goel
Original assignee: Individual
Current assignee: Synamedia Ltd
Priority date: 1999-06-11
Filing date: 2005-06-29
Publication date: 2005-10-27
Also published as: US20090282372A1; US20060271973A1; US7992163B1

Abstract

Included is a method for an interactive media services system to provide a screen saver utility to a user through an interactive media services client device. The client device may be coupled to a programmable media services server device. The method may include the steps of providing a system operator with an interface to the programmable media services server; and providing control options within the interface to allow the system operator to dictate media to be presented in the screen saver utility, a plurality of parameters that result in activation of the screen saver utility, and a procedure to be followed in exiting the screen saver utility.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application is a divisional of Application Ser. No. 09/590,434, filed June 9, 2000, which claims priority to Provisional Application No. 60/138,756 filed Jun. 11, 1999, both of which are entirely incorporated herein by reference.

FIELD OF THE INVENTION

This invention relates in general to television systems, and more particularly, to the field of media-on-demand.

BACKGROUND OF THE INVENTION

Historically, television services have been comprised of analog broadcast audio and video signals. Cable television systems now receive broadcasts and retransmit them with other programming to users over land-line networks, typically comprising fiber optic cable and/or coaxial cable. With the recent advent of digital transmission technology, cable television systems are now capable of providing much more than the traditional analog broadcast video. In addition, two-way and advanced one-way communications between a subscriber and a cable system headend are now possible.

In implementing enhanced programming, the home communication terminal (“HCT”), otherwise known as the settop box, has become an important computing device for accessing video services and navigating a subscriber through a maze of services available. In addition to supporting traditional analog broadcast video functionality, digital HCTs (or “DHCTs”) now also support an increasing number of two-way digital services such as video-on-demand.

Each HCT or DHCT (collectively hereinafter “DHCT”) is typically connected to a cable or satellite television network. The DHCTs generally include hardware and software necessary to provide the functionality of the digital television system at the client's site. Preferably, some of the software executed by a DHCT is downloaded and/or updated via the cable television network. Each DHCT typically includes a processor, communication components and memory, and is connected to a television or other display device, such as a personal computer. While many conventional DHCTs are stand-alone devices that are externally connected to a television, a DHCT and/or its functionality may be integrated into a television or personal computer, as will be appreciated by those of ordinary skill in the art.

With the advent of media guide “browsers” for use in cable television systems, viewers (also referred to as “subscribers” or “users”) can scan programming information in a variety of methods. For specialized services such as on-demand video services, hundreds, or even thousands, of title options may be made available to the user for purchase and viewing. The service is not usable if the user is besieged with choices with no effective method for navigating and selecting a desired choice. For example, navigating a library of thousands of movie titles in a scrolling list alphabetically is very cumbersome.

A problem exists in providing a method to efficiently configure promotional information within the user interface provided to a user. A problem exists in providing a user promotional information to entice rental or purchase the media assets.

An additional problem exists in including advertisements in media guide browsers where the advertisements are not located at the cable television providers' transmitting location, but rather external thereto. With the advent of internet banner advertising, a need exists for a similar type of modular advertising that is easily update and may be tailor to an individual user or groups of users. A problem exists in configuring the media guides to enable third parties to seemlessly integrate advertisements without constant intervention and reconfiguration by the cable television provider.

SUMMARY

The present disclosure includes embodiments of a method for an interactive media services system. One embodiment of the method can provide a screen saver utility to a user through an interactive media services client device, said client device coupled to a programmable media services server device. Additionally, the method includes the steps of: providing a system operator with an interface to the programmable media services server and providing control options within the interface to allow said system operator to dictate media to be presented in the screen saver utility, a plurality of parameters that result in activation of the screen saver utility, and a procedure to be followed in exiting the screen saver utility.

Also included in this disclosure are embodiments of a television set-top terminal ( “STT”). One embodiment of the STT is coupled to a server via a bidirectional communication network. The STT includes a memory having program code stored therein, and at least one processor. The processor is programmed by the program code to enable the STT to request a motion video presentation, establish a dedicated network session with the server, and provide the motion video presentation to a user via the established network session. Additionally, the processor can be programmed to suspend the provision of the motion video presentation responsive to a first user input and provide a promotional motion video presentation to the user responsive to the first user input.

Other systems, methods, features and/or advantages will be or may become apparent to one with skill in the art upon examination of the following drawings and detailed description. It is intended that all such additional systems, methods, features and/or advantages be included within the scope of the present invention and be protected by the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. In the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a block diagram of a cable television system in accordance with one preferred embodiment of the present invention.

FIG. 2 is a diagram of theheadend11 as depicted inFIG. 1.

FIG. 3 is a block diagram of a DHCT and related equipment, in accordance with one preferred embodiment of the present invention depicted inFIG. 1.

FIGS. 4A-4M are flow diagrams that define the signaling interactions between the DHCT, the DNCS, the MOD application server, and theVOD content server22 to set up, maintain, and tear down VOD sessions.

FIGS. 5 and 6 are flow chart diagrams of the user interface flow for providing the MOD service in the network depicted inFIG. 1.

FIG. 7 is a diagram of a remote unit that communicates with the DHCT shown inFIG. 3.

FIG. 8A-8D are block diagrams of the MOD title catalog screen as described inFIG. 5.

FIG. 9 is a display diagram of the MOD title catalog screen shown inFIG. 8B with a browse-by screen overlaid on top of the MOD title catalog screen.

FIG. 10 is a display diagram of a rental option screen as one embodiment of the title purchase option described inFIG. 5.

FIG. 11 is a display diagram of a PIN entry screen presented subsequently to the rental options screen inFIG. 10 indicating that the selected MOD title is blocked because of its rating and providing a personal identification (PIN) entry to access the blocked MOD title.

FIG. 12 is a display diagram of a title rental access PIN entry screen presented to the user requesting PIN confirmation of purchase of the MOD title previously selected from the MOD title catalog screen inFIG. 8A.

FIG. 13 is a display diagram of the please wait barker presented to the user while service is established from the headend (FIG. 2) to the user's DHCT (FIG. 3).

FIG. 14 is a display diagram of the MOD service unavailable barker presented to the user indicating that the purchased MOD title (from the MOD title catalog screen (FIG. 8A)) cannot be presented at the requested time.

FIG. 15 is a display diagram of the rental period end screen presented to the user when the duration of the rental period has expired as chosen in the rental options screen inFIG. 11.

FIG. 16 is a display diagram of the end movie rental screen presented to the user when providing the opportunity to prematurely end rental of a MOD title selected from the MOD title catalog screen inFIG. 8A prior to expiration of the rental duration.

FIG. 17 is a display diagram of the MOD service problem barker presented to the user informing of the user of a problem in the delivery of the purchased MOD title from the MOD title catalog screen inFIG. 8A.

FIG. 18 is a display diagram of the MOD rental not authorized barker presented to the user if the user is not authorized to receive a MOD title selected from the MOD title catalog screen inFIG. 8A.

FIG. 19A-19C are display diagrams of MOD current rental screens as described inFIG. 5.

FIG. 20 is a display diagram of the VOD stream control mechanisms as described inFIG. 6 that a user may utilize during viewing of a MOD title.

FIG. 21 is a diagram of a non-limiting example of a sequence of still screens that may comprise a screen saver operation that operate as described inFIG. 20.

FIG. 22 is a non-limiting example of asystem operator GUI295 for configuring some of the previously described configurable parameters.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 is a block diagram of acable television system10 including aheadend11 for receiving television signals, such as satellite television signals, and converting the signals into a format for transmitting the signals over thesystem10. The transmitted signals can, for example, be radio frequency (RF) signals or optical signals, as shown, transmitted overfiber optic cable12. When the optical signals are transmitted by theheadend11, one or moreoptical nodes13 are included in thesystem10 for converting the optical signals to RF signals that are thereafter routed over other media, such ascoaxial cables14.Taps15 are provided within thecable system10 for splitting the RF signal off, viacables17, to subscriber equipment such asDHCTs16, cable-ready television sets, video recorders, or computers. Thus,headend11 is connected through anetwork18 tomultiple DHCTs16.

FIG. 2. is a block diagram of theheadend11 as configured in the cable television system network to provide media-on-demand (MOD) services. MOD application serverMOD application server19 is responsible for provisioning the services provided by the video-on-demand (MOD) application, as directed by the system operator, and for providing the content or data needed by the MOD application client that executes on theDHCT16. Provisioning is the process that defines the MOD application's services, including the reservation and configuration of system resources needed to provide those services, and the capability to bill for such services.MOD application server19 and a plurality ofother application servers20 are connected to a digital network control system (DNCS)23 via anEthernet connection32.

TheDNCS23 provides complete management, monitoring, and control of the network's elements and broadcast services provided to users. TheDNCS23 uses adata insertion multiplexor29 and adata QAM30 to insert the in-band BFS data into an MPEG-2 transport stream. TheDNCS23 also contains a Digital Storage Media-Cinnad-in-Control (DSM-CC) session andresource manager34 that works with other components of theDNCS23 in order to support the delivery of the MOD service to the user. The DSM-CC session and resource manager processes user to network (U-N) session signaling messages, manages allocation of session-related network resources and supports network management operations. The DSM-CC session manager34 (FIG. 2) supports exclusive services such as MOD by providing the signaling interface to establish, maintain and release client initiated exclusive sessions. The DSM-CC session manager acts as a point of contact to the network for the DHCT's in thenetwork18 to establish individual sessions. The DSM-CC session manager also defines a resource descriptor structure, which is used to request the network resources within a session.

TheMOD application server19 communicates via theEthernet connection32 to a service application manager (SAM)server25 contained on theDNCS23. TheSAM25 provides a model in which the user can access services available on the system. A service consists of an application to run and a parameter, such as data content, specific to that service. The SAM handles the lifecycle of the applications on the system, including the definition, initiation, activation, suspension and deletion of services they provide and the downloading of the application into theDHCT16. Many services can be defined using the same application component, with different parameters. TheMOD application server19 defines its application to theSAM server25 and theSAM server25 instructs a broadcast file system (BFS)server28 to add the MOD application client executable code to the carousel (not shown) for distribution to thevarious DHCTs16 in thenetwork18.

TheBFS server28 is a part of a broadcast file system that has a BFS client43 (FIG. 3) module in each DHCT16 in thenetwork18. Applications on both theheadend11 and theDHCT16 can access the data stored in theBFS server28 in a similar manner to a file system found on disc operating systems. TheBFS server28 repeatedly sends data for applications on a carousel (not shown) over a period of time so that theDHCT16 that is interested in any particular data may receive it when it is the user desires the data. Thus, theBFS client43 contained in theDHCT16 that receives the broadcast from theBFS server28 can implement the application for the user.

TheVOD content manager21 andVOD content servers22 deliver MPEG-2 content to a service group of QAM modulators that compriseservice group number24. Thecontent manager21 is responsible for managing the content on theVOD content servers22. TheMOD application server19 utilizes theVOD content manager21 andVOD content servers22 to deliver the video and audio streams that make up the MOD services. TheMOD application server19 is also responsible for controlling theVOD content manager21 andVOD content servers22. Theservice group24 is actually a multiplex of QAMs that illuminate aparticular DHCT16. A network session manager (not shown) in aDNCS23 uses theservice group24 to determine which QAM modulator has access to aparticular DHCT16. The QAM modulators that comprise theservice group24 receive the MPEG-2 transport stream from theVOD content servers22 and convert it to an RF signal at a specified frequency (channel). The QAM modulators of theservice groups24 are also responsible for encrypting the transport stream and inserting other data and information into the stream.

TheQPSK modem26 is responsible for transporting the out-of-band IP (internet protocol) datagram traffic between thedistribution headend11 and aDHCT16. Data from theQPSK modem26 is routed byheadend router27 within theheadend11. Theheadend router27 is also responsible for delivering upstream application traffic to the

various application servers

19,20.

FIG. 3 is a block diagram illustrating theDHCT16 coupled toheadend11 discussed above with other system equipment. TheDHCT16 is typically situated within the residence or business of a user. It may be integrated into an output device that has adisplay31, such as a television set, or it may be a stand-alone unit that couples to anexternal display31, such as a display included with a computer or a television, and that processes media transported in television signals for presentation or playback to a subscriber (user of the DHCT). The display device also includes audio output equipment. In a non-limiting example, thedisplay31 includes a hi-fi stereo for digital quality music reproduction. TheDHCT16 preferably comprises acommunications interface33 for receiving the RF signals, which can include media such as video, audio, graphical and data information, from thetap15 and for providing any reverse information to thetap15 for transmission back to the headend11 (FIG. 1). TheDHCT16 further includes at least oneprocessor35 for controlling operations of theDHCT16, including a video output port such as anRF output system36 for driving thedisplay31, atuner system37 for tuning into a particular television channel to be displayed and for sending and receiving data corresponding to various types of media from theheadend11. Thetuner system37 includes in one implementation, an out-of-band tuner for bi-directional quadrature phase shift keying (QPSK) data communication and a quadrature amplitude modulation (QAM) tuner for receiving television signals. Additionally,DHCT16 includes areceiver39 for receiving externally-generated information, such as user inputs or commands for other devices. TheDHCT16 may also include one or more wireless or wired interfaces, also called ports, for receiving and/or transmitting data to other devices. For instance, theDHCT16 may feature USB (Universal Serial Bus), Ethernet (for connection to a computer), IEEE-1394 (for connection to media devices in an entertainment center), serial, and/or parallel ports. The user inputs may, for example, be provided by a computer or transmitter with buttons or keys located either on the exterior of the terminal or by a hand-held remote control device40 (alsoFIG. 7) or keyboard that includes user-actuated buttons.

In one implementation, amemory portion41 of theDHCT16 includesflash memory42 and dynamic random access memory (DRAM)44 for storing the executable programs and related data components of various applications and modules for execution by theDHCT16. Both theflash memory41 and theDRAM memory44 are coupled to theprocessor35 for storing configuration data and operational parameters, such as commands that are recognized by theprocessor35.

Basic functionality of theDHCT16 is provided by anoperating system46 that is contained inflash memory42. One or more programmed software applications, herein referred to as applications, are executed by utilizing the computing resources in theDHCT16. The application executable program stored inflash memory42 orDRAM44 is executed by processor35 (e.g., a central processing unit or digital signal processor) under the auspices of theoperating system46. Data input by the application program is stored inDRAM44 or other source, either internal or external to theDHCT16, or possibly anticipated by the application and thus created with the application program at the time it was generated as a software application program, in which case it is stored inflash memory42. Data may be received via any of the communication ports of theDHCT16, from theheadend11 via the DHCT's network interface (i.e., the QAM or out-of-band tuners) or as user input viareceiver39. A type of input data fulfills and serves the purpose of parameters as described below. Data generated by application program is stored inDRAM44 byprocessor35 during the course of application program execution.

Theflash memory42 also contains aplatform library48. Theplatform library48 is a collection of functionality useful to applications, such as a Timer Manager, Compression Manager, Database Manager, Widget Toolkit, String Managers, and other utilities (not shown). These utilities are accessed by applications so that each application does not have to contain these utilities thus resulting in memory consumption savings and a consistent user interface.

The SAM, as discussed above, includes a SAM server25 (FIG. 2) inheadend11 and aSAM client37 in theDHCT16. TheSAM client37 is a part of theplatform library48. As a non-limiting example, an application to tune video programming could be executed with one set of parameters to view HBO and a separate set of parameters to view CNN. Each association of the application component (tune video) and one parameter component (HBO or CNN) represent a particular service that has a unique service ID.

An application client is the portion of an application that executes on theDHCT16 and provides the application's services to the user typically through a graphical user interface. Also contained inflash memory42 is anavigator application51 that provides a navigation framework for the user to access services available on the cable system. Examples of the services include, in one implementation, watching television and pay-per-view events, listening to digital music, and an interactive program guide, each of which is controlled through separate applications inflash memory42. Thenavigator51 also allows users to access various settings of theDHCT16, including volume, parental control, VCR commands, etc.

Interactive program guide (IPG)53,Watch TV55, and pay-per-view (PPV)57 are all resident applications inflash memory42. TheIPG53 displays a program guide to the user and populates the guide with program data for selection. WatchTV55 enables a user to simply “watch television” whilePPV57 enables other services to be organized into events and purchased as premium television services. These applications, because they are inflash memory42, are always available to the user and do not need to be downloaded each time theDHCT16 initializes.

The applications that are stored in theDRAM44 may be applications that are loaded when theDHCT16 initializes or are applications that are downloaded to theDHCT16 upon a user-initiated command using an input device such as the remote40. In this non-limiting example, as shown inFIG. 2,DRAM44 contains the following application clients: ane-mail application client59, a digital music application client61, aservice guide application63 and a media-on-demand application client (MOD)65 (discussed in more detail below). It should be clear that these applications are not limiting and merely serve as examples for this present embodiment of the invention.

The applications shown inFIG. 3 and all others provided by the cable system operator are top level software entities on the network for providing services to the user. In one implementation, all applications executing on theDHCT16 work with thenavigator51 by abiding by several guidelines. First, an application utilizes and implements theSAM client37 for provisioning activation, and suspension of services. Second, an application sharesDHCT16 resources with other applications and abide by the resource management policies of theSAM client37, theoperating system46, and theDHCT16. Third, an application handles all situations where resources are unavailable withoutnavigator51 intervention. Fourth, when an application loses service authorization while providing a service, an application should suspend the service gracefully. Thenavigator51 will reactivate an individual service application when it later becomes authorized. Finally, an application is configured so it does not respond to input commands reserved for thenavigator51. For instance, as a non-limiting example, when user input commands are entered via a wireless remote control device orkeyboard40, the application is configured so it does not have access to certain user input keys that are reserved by the navigator51 (i.e., power, channel+/−, volume+/−, etc.). However, without any limitations to the aforementioned, in certain circumstances certain applications during the course of program execution may reach a machine-state in which input keys that would ordinarily be reserved may be employed for input by the application but mainly during that particular machine-state. For instance, an application may display a user interface that specifically requests input or selection from the user in which one or more of the reserved keys are used momentarily during that machine-state.

The MOD application client65 (FIG. 3), in providing its service, engages in a direct two-way IP (Internet Protocol) connection with a VOD content server22 (FIG. 2). TheMOD application server19 is responsible for providing configuration and service data to theMOD application client65, such as the catalog of titles available for rental by the user.

To provide the MOD service to the user, theMOD application client65 interacts with the MOD application server19 (FIG. 2) and other elements in theheadend11 to provide the on-demand service, such as theVOD content server22. Before describing the MOD application operation itself, some of the system infrastructure used by the MOD application to provide the MOD services will be described. While the network platform to support video-on-demand is not the subject of this invention, the method in which the MOD application utilizes this platform is novel.FIGS. 4A-4M are flow diagrams that define the signaling interactions between the DHCT, the DNCS, the MOD application server, and theVOD content server22 to set up, maintain, and tear down VOD sessions.

The first signal and scenario, as shown instep71 inFIG. 4A, is the DHCT initialization scenario. TheDHCT16 requests aconfiguration73 from thenetwork18, and if theDHCT16 is verified as an authorized device on thenetwork18, the DNCS23 (FIG. 2) sends back aconfirmation74 with the parameters for theDHCT16 to operate on anetwork18. Thisscenario71 is performed automatically whenever a DHCT16 is connected to the network. TheMOD application client65 is not responsible for performing initialization; however, theoperating system46 provides an application programming interface (API) which allows an application to query configuration parameters received in theU-N ConfigConfirm message74.

FIG. 4B is a display diagram of theDHCT16

configuration update scenario

76 periodically performed to update the network configuration of a DHCT16 after theinitial configuration71 has been completed. Thisupdate scenario76 occurs when the configuration has been changed at theheadend11, andU-N Configindication message77 may be addressed to a group ofDHCTs16 to update a particular set of network parameters on the entire group. TheU-N ConfigIndication message77 may be sent at any time after a DHCT16 has been configured on thenetwork18 and contains the same message as sent in theinitialization confirmation74 but with fewer parameters included.

TheMOD application server19 initialization scenario79 (FIG. 4C) is used whenever a server is introduced to thenetwork18. TheMOD application server19 makes aconfiguration request81 from the network that is verified by theDNCS23 with aserver19 to operate on thenetwork18.

TheMOD application server19 may also receive update messages from theDNCS23 after theinitial configuration79 has been completed. TheDNCS23 periodically sends theconfiguration indication message85, as show inFIG. 4D, to theMOD application server19 over an extended period of time. The configuration indication message contains the same message that was sent in theinitial configuration79, with fewer parameters included. Although theMOD application server19 receives its message repeatedly from theDNCS23, theMOD application server19 needs to process the message if the transaction identification changes from previous messages.

FIG. 4E is a diagram ofsteps89 for establishing a MOD session. TheDHCT16 initially sends amessage91 to theDNCS23 that initializes a session request. Therequest91 usually happens after theMOD application client65 has allowed the user to select a title that the user wishes to rent or purchase. Information about the on-demand media and any other application specific information is passed from theMOD application client65 to the VOD contesnt server connection manager in the VOD server sessionsetup indication message93. Thissetup indication message93 is not modified by the DNCS, but is merely passed straight to theMOD application server19. When theMOD application server19 receives the sessionsetup indication message93, it verifies the eligibility of theDHCT16 and the service that is being requested. TheDNCS23 may send the DHCT16 a sessionproceeding indicating message94.

If theVOD content server22 determines that it can deliver the service, it sends aServerAddResourceRequest message97 to theDNCS23 to reserve the network resources to deliver that service. TheDNCS23 allocates the requested resources and sends to the VOD content server22 aServerAddResourceConfirm message98 to indicate that the requested resources have been allocated. TheVOD content server22 then responds to the servicesession indication message93 with a serversetup response message99 that indicates that theVOD content server22 is ready to begin delivering the service using the resources allocated by theDNCS23.VOD content server22 sessionsetup response message99 may contain user data which is passed by theDNCS23 to theDHCT16. TheDNCS23 sends theClientSessionSetupConfirm message102 to theDHCT16 that contains the resource descriptors (not shown) needed by theDHCT16 to receive the requested service. Thismessage102 may contain the user data that was sent from theVOD content server22. Finally, theDHCT16 sends to the DNCS23 aClientConnectRequest message104 indicating that theDHCT16 is ready to receive the requested service, and theDNCS23 sends the VOD content server22 aconnect indication message105 indicating that theDHCT16 is ready to receive that service.

The resource descriptors described above are used to define the resources which are allocated to a session. An interactive session has two resource “views”.VOD content server22 defines the resources that are used to deliver the service fromVOD content server22 into thenetwork18. TheMOD application client65 defines resources that are used in order for theDHCT16 to receive the service from thenetwork18.

TheVOD content server22 resource descriptor view is used when the server is delivering an MPEG program over a transport stream that is directly connected to thenetwork18 and does not require any signaling to set up the connection. The video on demand service architecture described above uses this type of connection.

For theMOD application server19 resource descriptor view, two resource descriptors are used. The TSDownstreamBandwidth resource descriptor contains a transport stream ID field and a bandwidth field. The transport stream ID identifies the physical connection from theMOD application server19 to thenetwork18. This transport stream ID is typically assigned by a network operator when a new connection is installed. The downstream bandwidth resource descriptor also identifies, in bits per second, the amount of bandwidth to deliver a service. This amount of bandwidth will be reserved in thenetwork18 for the duration of the MOD session with theDHCT16 that requests the service.

The MPEG Program resource descriptor is anotherVOD content server22 resource descriptor view. This resource descriptor identifies the MPEG Program that is carrying the service and used by the network to determine which program from the transport stream to route to theDHCT16. The MPEG program also allows the application to assign association tags to each of the elementary streams in the program. These association tags may be used by the receiver to determine the use of each of the streams. The association tag is guaranteed to be maintained and to end in a session even if the MPEG program is remapped. The second resource view of an interactive session is theMOD application client65 resource descriptor view. This view is used for all services that use MPEG to deliver the downstream data. The MOD service architecture defined above uses this type of connection for all downstream connections. The resource descriptor, “TSDownstreamBandwidth”, contains a transport stream ID field and a bandwidth field. The transport stream ID identifies the QAM modulator in service group24 (FIG. 2) that is transmitting a service. This transport stream ID is assigned by a network operator (not shown) when anew QAM24 is installed. The downstream bandwidth resource descriptor identifies, in bits per second, the bandwidth at which a service will be delivered.

MPEG Program resource descriptor identifies the MPEG program that is carrying the service. This resource descriptor is used by theDHCT16 to determine which program from a transport stream to decode. This descriptor also allows theMOD application client65 to assign association tags (not shown) to each of the elementary streams in the program. These association tags may be used by theDHCT16 to determine the use of each of the streams. The association tag is guaranteed to be maintained end-to-end in a session even if an MPEG program resource descriptor has been remapped.

Another signaling scenario supported by the present invention is theVOD content server22 in-progress scenario.FIG. 4F is a display diagram110 depicting the MOD application server inprogress request111 message communicated from theVOD content server22 to theDNCS23. TheDNCS23 uses thismessage111 as an audit mechanism to determine if it is in sync with theVOD content server22. The MOD application server periodically sends this MOD application server session inprogress message111 to theDNCS23. The111 contains a list of all active session for that MOD application server, and theDNCS23 compares this list to its list of active sessions for that particular application server. TheDNCS23 takes appropriate action if the lists do not match.

TheDNCS23 periodically initiates a MOD application client session inprogress request114 as shown inscenario113 inFIG. 4G. Thismessage114 is used to periodically inform thenetwork18 of the sessions that are active on aDHCT16. TheDNCS23 uses this message as an audit mechanism to determine if it is in sync with theDHCT16. TheDHCT16 periodically sends a client in session progress message (not shown). This message contains a list of all active sessions for theDHCT16. TheDNCS23 compares this list to a list of active sessions for that DHCT16 and takes appropriate action if the lists do not match.

The present invention permits theDHCT16 to initiate a MOD session tear down scenario.FIG. 4H is a display diagram118 depicting the procedure for tearing down a session using the client initiated session release scenario. A session that is active on thatparticular DHCT16 may be torn down by theDCHT16. The initiate this process, theDHCT16 sends a MOD applicationclient release request119 to theDNCS23. TheDHCT16 sends theclient release request119 after it has stopped using all resources for a session that it is attempting to tear down. TheDNCS23 receives theclient release request119 and initiates a MODserver release indication121 to theVOD content server22. TheVOD content server22 responds with a server release response123 to theDNCS23 which is then passedDHCT16 in the form of a MOD client release confirmmessage124. Thenetwork18 does not release the resources provided for the session until the MOD server release response123 is received from theMOD application server19.

A session tear down scenario may also be initiated by the MOD application server.FIG. 4I is a display diagram127 of the process for aVOD content server22 to tear down a session. TheVOD content server22 issues aserver release request129 to theDNCS23 after it has stopped using all resources for a particular session that it is attempting to tear down. TheDNCS23 initiates a clientrelease indication message131 to theMOD application client65 on theDHCT16 which is responded to in the form of aclient release response133. TheDNCS23 then initiates a server release confirmmessage134 to theVOD content server22 that initiated the tear down scenario. Thenetwork18 does not release the resources for the MOD session until the clientrelease response message133 is received by theDNCS23.

A MOD session tear down scenario may also be initiated by theDNCS23.FIG. 4J is display diagram140 of theDNCS23 initiated session tear down scenario. In so doing, theDNCS23 initiates a serverrelease indication message142 to theVOD content server22 providing the MOD session. TheDNCS23 may also simultaneously release the clientrelease indication message144 to theDHCT16 notifying theDHCT16 of the tear down sequence. TheVOD content server22 that received the serverrelease indication message142 responds by a serverrelease response message146, and theDHCT16 responds to the clientrelease indication message144 with a clientrelease response message148. The resources attributed or assigned to the MOD session are not released until both the clientrelease response message148 and the serverrelease response message146 are received by theDNCS23.

TheVOD content server22 provides an API by which the application servers can register interest in session setup and tear down events. Messages describing these events are sent to registered application servers and include the session ID and the user (application) data contained in the session setup request, such as the MAC address of theDHCT16, the title ID, and the rental option in the case of the MOD application. In this way the MOD application server can be notified when a VOD session is established with theVOD content server22 by theMOD application client65. Additionally, theMOD application server19 may use the API to request that theVOD content server22 tear down the session if the user of theDHCT16 is not authorized for the MOD service for billing reasons. TheDHCT16, theVOD content server22, and theDNCS23 may each initiate a session status scenario to determine the status of both the network and the other components described above.FIG. 4K is a display diagram150 of a client initiated session status scenario. This procedure is used byDHCT16 to query theDNCS23 for the sessions that theDNCS23 is maintaining for thatDHCT16. This procedure is also used to obtain detailed information about a session so that theDHCT16 may re-establish a session after a reboot. TheDCHT16 initiates a clientstatus request message152 to theDNCS23 to determine the status of thenetwork18. TheDNCS23 responds with a client status confirmmessage154 reporting the status to theDHCT16.

FIG. 4L is a display diagram156 of aVOD content server22 initiated session status request scenario. This procedure is used by aVOD content server22 to query theDNCS23 for sessions that theDNCS23 is maintaining for thatVOD content server22. This procedure is also used to obtain detailed information about a session so that the MOD application server may re-establish sessions after a reboot. In this case, theVOD content server22 sends a servicestatus request message158 to theDNCS23 to determine the status of the network. TheDNCS23 in this case responds with a service status confirmmessage159 reporting on the status of the network.

FIG. 4M is a display diagram of a network initiated clientsession status request161 and a serversession status request165. This procedure is used by theDNCS23 to query a DHCT16 for the sessions that are currently active. This procedure is also used to obtain detailed information about a session so the DNCS23 can determine if a session at theDNCS23 is the same as the session maintained by theDHCT16. In the client session status request scenario, theDNCS23 initiates a clientstatus indication message162 to theDHCT16 requesting status indication information. TheDHCT16 responds with a clientstatus response message164 to the DNCS reporting on the status of the MOD session. Similarly, theDNCS23, in the serversession status request165, initiates a serverstatus indication message166 to theVOD content server22. TheVOD content server22 responds with the status information in the form of a serverstatus response message168 to theDNCS23 reporting on its status.

The section described above is descriptive of one system for implementing the MOD service of the preferred embodiment of the present invention. The section below is descriptive of theMOD application client65 user interface flow for navigating and executing other aspects of the MOD service.

FIGS. 5 and 6 are flow chart diagrams of theuser interface flow190 for providing the MOD service (shown, in this non-limiting example, as a MOD service). TheMOD application client65 activates, as instep191, prior to providing the MOD service. The MOD service may be activated, as instep191, when the user tunes to the MOD service. The user may access the MOD channel in a variety of methods.

FIG. 7 is a display diagram ofremote unit40, as a non-limiting example, that enables the user to access the MOD channel. The MOD channel may be accessed by direct channel number entry bynumeric keys181, the channel up/downbutton182, by afavorite channels button184, by a last-channel recall button186, or by accessing a button dedicated for the interactive program guide (IPG) (not shown). The user may access the MOD channel via the service guide application (not shown) which, in one embodiment, may be activated by the “guide”key188. Additionally, the user may be routed to the MOD channel from a “trailer” channel that links a user to the MOD channel if the user selects a particular trailer for purchase as it appears on thedisplay31.

Returning toFIG. 5, when the user tunes to the MOD channel, thenavigator51 asks theSAM37 for the service mapped to the channel, which is a service provided by the MOD application. Thenavigator51 then uses theSAM37 to activate the MOD service. If theMOD application client65 is not resident in the memory of theDHCT16, theSAM37 uses facilities of the operating system to download theMOD application client65 using theBFS client43. Once loaded inDHCT16 memory, theMOD application client65 is executed.

An activate service event is then delivered to theMOD application client65. Contained in the event is the is the parameter data defined for the service by theMOD application server19 when it was provisioned by the system operator. The parameter includes theURL server19, and other system operator configurable parameters such as the initial browse-by category to display the catalog screen, a trailer channel to tune upon activation, etc. as described in context below.

The first time theMOD application client65 is activated, it connects to theMOD application server19 and retrieve information about the user. The MOD application client opens a User Datagram Protocol (UDP) socket and sends the MOD application server19 a request for current user information. The request includes a Media Access Control (MAC) address uniquely identifying theDHCT16, and thus identifying the user. TheMOD application server19 then returns the requested user information, including but not limited to current rental information and user configuration information. This information has been stored in theMOD application server19 database previously based on theMOD application client65 creating VOD sessions and from commands from theMOD application client65 over a UDP socket to store user configuration information. Both of these types of information are described in more detail in their relevant context below.

TheMOD application client65 then checks its internal state to determine if the user currently has anycurrent rentals193. If not, the MOD title catalog screen197 (FIG. 8A) is displayed, as instep195.

FIG. 8A is a display diagram of the MODtitle catalog screen197 showing the available MOD titles for selection by the user. The MODtitle catalog screen197 includes a banner for the name of thetitle catalog screen198 at the top portion of thescreen197. The title of the selectable browse bylist199 may be placed below thebanner198. The MODtitle catalog screen197 may optionally include an index inlabel bar200. The user can sort through the available MOD titles in an area shown as the current browse bylist201. The user may navigate the current browse-bytitle list201 by manipulating remote40 (FIG. 7) as instructed by the graphics shown in thenavigation information area203. Thenavigation information area203 may typically include images of selection arrows and selection buttons for choosing the desired MOD title from the current browse-bylist201. As yet another non-limiting example, a third option includes a full-screen title description page providing detailed information about a highlighted or selected MOD title. Abutton bar209 is included at the bottom of the MODtitle catalog screen197 for providing the user various options including renting the desired MOD title or even exiting the MOD application completely.

Information about a MOD title highlighted in the current browse-bylist201 may optionally be presented to the user in theright portion204 of the MODtitle catalog screen197. As a non-limiting example, a first option includes astill photo204aalong withprogramming information204brelated to a highlighted MOD title in the current browse bylist201. As the user navigates through different MOD titles, the stillphoto204aand theprogramming information204bchange accordingly. As another non-limiting example, a second option for the right portion of the MOD title catalog display includes along description204cthat allows the user to obtain detailed information about the highlighted MOD title in the current browse bylist201. As still yet another non-limiting example, a third option includes presenting a streaming video portion in the location as described above for thestill photo204aandprogram information204bsimilarly to option one described above. The streaming video may also be a reduced portion of a MOD title movie as a preview. The reduced portion of the MOD title may be any segment of the MOD title of length set by a system operator atheadend11. The video shown as a preview may either be the video of the title highlighted in the current browse-bylist201 or any other MOD title.

FIG. 8B is a display diagram of the MODtitle catalog screen197 that depicts MOD title selection information and options one and three as described above. In this non-limiting example, “Featured Movies” is shown in the title of selectable browse-bylist199. Thenavigation information203, in this non-limiting example, includes an up/down arrow plus a “SEL” key for selecting the desired MOD title. Also in this non-limiting example, the highlighted movie in the current browse-bylist201 is “Analyze This”201a. On the right portion of the MODtitle catalog screen197 may be previously discussed option one or three including still photo orsteaming video204aandprogram information204b.INFO button210, alternatively, may be configured by a system operator interface (not shown) to provide a trailer or preview of the highlightedMOD title201ain theportion204aif a still image was previously shown, as in the non-limiting example as shown inFIG. 8B. In one embodiment, a full screen or reduced screen movie trailer or MOD title preview is provided when the user selects the INFO button.

Thebutton bar209 at the bottom portion of thetitle catalog screen197 includes options for the “A”, “B”, and “C” keys of remote unit40 (FIG. 7). Continuing with this non-limiting example, pressing the “A” key activates another application known as the service guide (not shown). Depressing the “C” key on the remote unit40 (FIG. 7), as shown in thebutton bar209, takes the user to a current rental screen. Finally, depressing the “B” key brings up a browse-by menu for the user to change the browse bylist category199 and this is discussed in more detail below.

To present a preview of a MOD title in the reducedportion204aas described above, the actual MOD title MPEG content contained on the VOD content server22 (FIG. 2) is delivered to theDHCT16 and displayed inportion204a. The preview is separate from a “trailer” in that a trailer is a pre-edited portion of the MOD title separate from the MPEG content while the preview is the actual data stream of the MOD title. Thus, option three, as described above, may be configured to provide either a trailer or a preview inportion204a.

FIG. 8C is a display diagram of the MODtitle catalog screen197 configured as option two as described above. In this non-limiting example, a description of the MOD title highlighted201 a in the current browse-bylist201 is shown in right portion of204c. In this non-limiting example,selectable buttons207 may be included in theright portion204cproviding additional options to those shown inbutton bar209.

FIG. 8D is a display diagram of a title description screen218 (option four) presented to the user upon request from the MODtitle catalog screen197 inFIG. 8A. Thetitle description screen218 is a full screen view. In a center portion of thedisplay220, detailed descriptive information is presented. The user is presented a canceloption221 which re-displays the MODtitle catalog screen197. If the title information is larger than that available on the screen, scrolling capability is provided via arrow input keys for the user to view the entire title information.

The MOD title catalog screen197 (FIG. 8A) also allows the user to change the current browse-bylist201 to different catalog groupings.FIG. 9 is a display diagram of the MODtitle catalog screen197 with a browse-byscreen211 overlaid on top of the MODtitle catalog screen197. The browse-byscreen211 appears with choices for sorting all available MOD titles in acategory selection portion212, a plurality of categories of browse-by options. In adescription portion214 of the browse-byscreen211, a brief description is displayed about a highlighted category in the selectedcategory portion212. The various categories are essentially filters of all the movies shown under individual title category listings in the browse-byscreen211. As non-limiting examples, various browse by catalog categories include all titles, actor, action/adventure, adult, comedy, drama, family, rating, new releases, last chance, specials, among others. Once the user selects a category from the browse-byscreen211, the browse-byscreen211 disappears and the current browse bylist201 displays the new set of MOD titles for the selected category. The user may alternatively exit the browse-byscreen211 without changing the title display by following instructions shown in a bottom portion216 of the browse-byscreen211.

A separate browse-by screen (not shown) allows the user to search the MOD title catalog for a desired MOD title. This embodiment includes a blank field where theDHCT16 accepts user input for a specific MOD title to search. The search request is transferred from the DHCT16 to theheadend11. Results of the search are returned to theDHCT16 and are presented to the user.

The titles presented in the MODtitle catalog screen197 that are grouped in the various title categories are arranged by a system operator through an interface (not shown) at theheadend11. The interface is provided by the MOD application server19 (FIG. 2). The interface enables the system operator to configure separate catalogs and also the various title categories within each catalog. Mapping of titles to category is 1: N, and can be defined by the system operator via the MOD application server GUI.

Whenever a catalog or title category is updated or created, the catalog manager of theMOD application server19 generates and updates the catalog file(s) using the BFS server28 (FIG. 2). As described above theBFS server28 is in constant communication with a BFS client43 (FIG. 3) in theDHCT16 to provide updates and new applications to theDHCTs16 in the cable television system10 (FIG. 1).

Table I is a header file that is a pseudo-structure that describes the format of the MOD title catalog file as described above. Data types are indicated as follows: ui8=unsigned 8-bit integer; ui16=unsigned 16-bit integer; ui32=unsigned 32-bit integer.

TABLE 1


MOD TITLE CATALOG FORMAT

/ * File Header * /

ui16	format;	/ * file format identifier * /
ui16	version;	/ * construction generation number * /
ui16	service Id;	/ * identifier of MOD catalog channel * /
ui32	VODContentServerAddress;	/ * Server address where titles are stored * /
ui8	language [3];	/ * display language code * /

/ * rating string heap * /

ui8	ratingCount;	/ * number of strings in the rating heap * /
ui16	ratingOffsets[ratingCount];	/ * offset to each string in the rating heap * /
ui16	rating Bytes;	/ * total size, in bytes, of the rating heap * /
ui8	ratingHeap[ratingBytes];	/ * heap of rating strings * /

/ * theme string heap * /

ui8	themeCount;	/ * number of strings in the theme heap * /
ui16	themeOffsets[themeCount];	/ * offset to each string in the theme heap * /
ui16	theme Bytes;	/ * total size, in bytes, of the theme heap * /
ui8	themeHeap[themeBytes];	/ * heap of theme strings * /

/ * cost string heap * /

ui8	costCount;	/ * number of strings in the cost heap * /
ui16	costOffsets[costCount];	/ * offset to each string in the cost heap * /
ui16	costBytes;	/ * total size, in bytes, of the cost heap * /
ui8	costHeap[costBytes];	/ * heap of cost strings * /

/ * title stringheap * /

ui16	titleCount;	/ * number of strings in the title heap * /
ui32	titleOffsets[titleCount];	/ * offset to each string in the title heap * /
ui32	titleBytes;	/ * total size, in bytes, of the title heap * /
ui8	titleHeap[titleBytes];	/ * heap of title strings * /

/ * description string heap * /

ui16	descCount;	/ * number of strings in the desc heap * /
ui32	descOffsets[descCount];	/ * offset to each string in the desc heap * /
ui32	descBytes;	/ * total size, in bytes, of the desc heap * /
ui8	descHeap[descBytes];	/ * heap of desc strings * /

/ * actors string heap * /

ui16	actorCount;	/ * number of strings in the actors heap * /
ui32	actorOffsets [actorCount];	/ * offset to each string in the actors heap * /
ui32	actorBytes;	/ * total size, in bytes, of the actors heap * /
ui8	actorHeap [actorBytes];	/ * heap of actor strings * /

/ * rental options heap * /

ui8	rentOptionsCount;

for (idx = 0; idx < rentOptionsCount; idx + = 1)

{

ui16	rentDuration;	/ * rental period duration (minutes) * /
ui8	costIndex;	/ * index to the cost strings heap * /
ui8	rentId;	/ * identifier of rental plan * /
ui16	rentFlags;	/ * flags indicating support for trick modes, trailers,
		and other rental option attributes * /

}

/ * MOD program title catalog entries (sorted alphabetically by title) * /

ui16 MODCount;

/ * number of entries in the catalog * /

for (idx = 0; idx < MODCount; idx + = 1)

{

ui32	titleId;	/ * unique identifier for a program * /
ui16	titleIndex;	/ * index to title string in title heap * /
ui16	descIndex;	/ * index to description string in desc heap * /
ui16	length;	/ * length of the program minutes * /
ui16	year;	/ * year of the title * /
ui8	rating;	/ * index to the rating string in rating heap * /
ui8	themeCount;	/ * number of themes * /
ui8	themes [themeCount];	/ * array of indices to the theme heap * /
ui16	cancelPeriod;	/ * cancelation period for the title * /
ui8	rentCount;	/ * number of rental options for the title * /
ui8	rentalOptions [rentCount];	/ * array of indices to the rental options heap * /
ui8	actorCount;	/ * number of actors in the movie * /
ui16	actors [actorCount];	/ * array of indices to the actors heap * /

}

Upon addition of a new MOD catalog or title category to theBFS server28, the new files are immediately broadcast across thenetwork18 at intermittent intervals enabling theMOD application client65 on each DHCT16 to receive the updated information. To notify theMOD application client65 that new catalog files are available, theMOD application server19 uses the DSM-CC34 on theDNCS23 to send a UDP pass-thru message to the MOD application client via the operating system of theDHCT16. Each MOD application client, upon determining that a new catalog or an updated version is available, uses the BFS client43 (FIG. 3) in theDHCT16 to download the files and store them in theMOD application client65 database (not shown). The updated version of the files are implemented the next time the user activates the MODtitle catalog screen197. Alternatively, the MOD application client may chose to wait until the user activates the MOD service to load the most recent version of the MOD catalog for display at that time.

and installs the added MOD titles to theVOD content server22 by transferring title ID and MOD title MPEG content. TheVOD content manager21 adds the MPEG content to theVOD content servers22. The MPEG content for each newly added MOD title may include not only the video (or other media), but may also include MPEG data for a trailer for the MOD title that may be later included on a trailer channel or in the MODtitle catalog screen197 inportion204aas described above.

The system operator at theheadend11 may configure multiple MOD services to display different MOD title catalog screens197; as mentioned previously each MOD service includes a URL for the catalog to be used by that service. The different services (and thus catalogs) may be constructed based on demographic information for different types of users according to geographic origin, ethnicity, age, gender, etc. provided such information is known about subscribers in the system. As part of the mapping of MOD services to channels provided by theSAM server37, the operator may assign different MOD services with different catalogs to different geographic hubs in the television network. As a non-limiting example, the MODtitle catalog screen197 may predominately display MOD title categories tailored to Spanish programming, and these MOD title catalog screens197 may be implemented in geographical areas where the interest in Spanish programming is high. Alternatively, the system operator can create a separate MOD service with a title catalog of adult content separate from the main library of titles. This adult MOD service may then be offered on a separate channel as a premium service to subscribers interested in that content. Thus, different MOD title catalog screens197 are maintained at theheadend11 for presentation to users of varied interests.

Returning toFIG. 5, once the user navigates through the MODtitle catalog screen197 and chooses a MOD title for purchase,DHCT16 presents the user a title purchase option, as shown instep213.FIG. 10 is a display diagram of arental option screen227 as one embodiment of the title purchase option described in step213 (FIG. 5). Descriptive information about the selected MOD title is shown to the user in a center portion of thedisplay228. Contained in this descriptive information is one or more “rental options”: including both the rental period and rental price for the selected MOD title. In one rental option, the rental period may be the MOD title length—thereby requiring the user to immediately rent the MOD title and view it in its entirety at the time of rental. In another rental option, the rental period in the descriptive portion of thedisplay228 may be some integer multiplier of the MOD title length. As a non-limiting example, the rental period, as configured by the system operator at theheadend11 may be set to 2 times the MOD title length, so a two hour movie would enable a rental period of four hours. As yet another rental option, the rental period may be set to a specific period of time, such as a period of hours, days, or weeks. The price of the rental is included in the descriptive portion of thedisplay228 and may vary according to the popularity of the MOD title, the length of rental, and other variables as discussed in more detail below. Finally, if the user desires to rent the selected MOD title shown in the rental option screen227 (FIG. 10), the user may depress a button on the remote40 (FIG. 7) as directed in the rentaloption button bar229. A cancel option may similarly be presented in the rentaloption button bar229 that returns the user to the MODtitle catalog screen197. If more than one rental option is provided for the title, therental option screen227 includes a scrolling list of rental options.

An additional rental options that may be presented to the user in rental option screen227 (FIG. 10) include, as a non-limiting example, providing the user limited or unlimited control of VCR-like stream control functions (i.e., stop, fast-forward, rewind, pause, etc.). The rental price of the MOD title may be based on the amount of control the user has in implementing the MOD functions. Thus, the user may pay a higher price to rent a MOD title with full functionality as opposed to renting a MOD title with no functionality since bandwidth for the MOD title would be used for a shorter period of time if the user did not have the ability to stop, rewind, or pause the MOD title.

Still yet another rental option that may be purchased by the user from the rental option screen227 (FIG. 10) is the ability to view a MOD title multiple times during the rental period rather than merely once. As a non-limiting example, the rental options screen227 (FIG. 10) may include an option that enables the user to view the purchased MOD title a set number of times greater than one during the rental period or even an unlimited number of times during the rental period.

As another rental option, the user may select to view a MOD title without any promotional advertising. As a non-limiting example, a user, upon selecting such an option, may view a MOD title without any movie trailers that are commonly shown in movie theaters prior to the feature presentation. As another non-limiting example, the MOD title may be presented to the user without any advertising logos, brands, or other marks that might otherwise be included in the presentation of the MOD title.

AMOD application server19 graphical user interface (GUI) allows the system operator to define any number of rental options such as those mentioned above. Defined in the catalog is the information about each rental option: description, price, VOD stream control mechanisms enabled, trailers enabled, advertising enabled, etc. such that theMOD application client65 can enforce the chosen rental option for a title. The system operator can assign via the GUI any number of rental options to a given title, including a default list of rental options that is assigned to a title when it is installed.

As still yet another rental option, the user may have the option to change the language setting of the purchased MOD title to one of any other available languages from the default setting. The MPEG data stream of the MOD title as delivered to theDHCT16 may include two or more language audio tracks such that theDHCT16 may be configured to play an alternately chosen language according to the preference of the user. As a non-limiting example, a French speaking user may configure theDHCT16, by an interface (not shown) presented by theMOD application client65 to present the purchased MOD title in French language audio as opposed to, for example, and English language default setting. Additionally, theDHCT16 may, upon the user initially configuring the language, set the default for future presentations to the newly selected language. Alternatively, the MOD application client may access the language settings of the navigator51 (FIG. 3) and present all purchased MOD titles according to that language setting—provided the chosen language is one included in the MPEG audio track of the MOD title.

Once the user purchases a particular MOD title from the rental options screen227 (FIG. 10) but prior to presentation of the title, theMOD application client65 determines if the title is blocked by its particular rating, as shown in step230 (FIG. 5). To determine if a particular MOD title is blocked because of its rating, the user should have previously entered a setting in theDHCT16 defining what types of ratings would be acceptable for viewing. In the preferred embodiment this information is maintained by the resident navigator application and made available to other application clients via an application programming interface (API). TheMOD application client65 accesses the pre-configured rating parameters for comparison to the rating information contained in the catalog for the subject MOD title being purchased. As a non-limiting example, if a user configured theDHCT16 to prevent any movie with an “R” rating from being viewed or purchased, theMOD application client65 would not allow any movie with such rating to be purchased or viewed unless specifically overridden by the user. In this non-limiting example, parents may choose to block MOD titles with “R” ratings to prevent children from accessing the MOD titles while allowing the parents to access the blocked titles upon entry of a proper PIN. Thus, if theMOD application client65 determines instep230 that the selected MOD title is blocked by its rating, theapplication client65 allows the user to unblock the title on a proper PIN entry, as shown instep231. In the preferred embodiment, theMOD application client65 uses the “blocking PIN” number stored in the settings with thenavigator51 application. As such, a user can configure a single parental control PIN that is shared among applications. The user is allowed to escape or cancel from the PIN entry screen for overriding the title blocking according to rating, as shown instep232. If the user chooses to escape the PIN entry screen or enters an improper or incorrect PIN, as shown instep233, theMOD application client65 returns the user to the MODtitle catalog screen197 where the user reinitiates the MOD purchase sequence described above.

FIG. 11 is a display diagram of aPIN entry screen231 presented to the user indicating that the selected MOD title is blocked because of its rating and providing a personal identification (PIN) entry to access the blocked MOD title. ThePIN entry screen231 is a pop-up window that is overlaid over the rental entry screen227 (FIG. 10). The PIN may consist of any alphanumeric character or other non-alphanumeric character. Thecenter portion236 of thePIN entry231 includes a message requesting PIN entry andseveral blocks237 representing the requisite number of characters to be entered. The user may enter the PIN to access a blocked title with the remote40 (FIG. 7). Upon entry of each character, an asterisk may appear in eachblock237 signifying entry of a character. Once the user enters the PIN, the user may request acceptance of the PIN by inputting the “A” key on remote40 (FIG. 7) as instructed by the PINentry button bar239. Similarly the user may cancel the PIN entry override process, as in step232 (FIG. 5), by entering the “C” key on remote40 (FIG. 7) as instructed by the PINentry button bar239. If the user enters in an improper PIN number in step233 (FIG. 5), theMOD application client65 returns the user to the presenttitle catalog screen197.

In another embodiment, the user may configure theMOD application client65 through a graphical user interface menu (not shown) to block certain MOD titles grouped under certain themes. As a non-limiting example, a user may configure the DHCT16 to block all MOD titles under an “Adult Programming” theme if such a theme was included in the browse-by category list211 (FIG. 9). If the user attempted to access the “Adult Programming” theme, theDHCT16 would present a PIN entry screen similar to thePIN entry screen231 shown inFIG. 11. Thus, the user would be asked to enter the correct PIN as described above to access the blocked “Adult Programming” theme. Information for the categories set by the user as blocked may be stored in NVM by the MOD application client if space is available on theDHCT16. Alternatively, theMOD application client65 may send a UDP/IP message to theMOD application server19 to store the blocking information for the particular user in theMOD application server19 database (not shown).

In yet another embodiment, the user may configure theMOD application client65 to block rental of MOD titles according to some pre-set limits on media service. As a non-limiting example, theDHCT16 may block presentation of MOD titles after a certain number of successful requests have been made in a given time period. Thus, a user may configure the DHCT16 to allow five MOD title rentals in a month to control costs. In another non-limiting example, the user may limit the rental of MOD titles after a certain number of requests of a particular type of media has been ordered. Thus, theDHCT16 may limit rental of all MOD titles after the user has ordered five premium-priced MOD title rentals. Additionally, the user, in another non-limiting example, may limit rental of all MOD titles after a specific monetary value has been expended in a given time period. Thus, the user may set a $50.00 per month for MOD title rental, and after that amount has been spent, the DHCT16 blocks further rental attempts unless the user overrides the blocking process by entering the PIN. In each of these non-limiting examples, the user can override the block placed on the rental by entering a proper PIN as described above. All of this user-configured blocking information is stored in theMOD application server19 database (not shown) as described for previous user configurations.

If theMOD application client65 determines that the selected MOD title is not blocked by any of the aforementioned parameters, as in step230 (FIG. 5), or the user overrides the blocking process, as instep233, theMOD application client65 presents the user with a title rental accessPIN entry screen240, as in step238 (FIG. 5).FIG. 12 is a display diagram of a title rental accessPIN entry screen240 presented to the user requesting PIN confirmation of purchase of the MOD title previously selected. Similarly as above, the PIN may consist of any alphanumeric character or other non-alphanumeric character. In one embodiment, theMOD application client65 retrieves the value of the PIN from the API of thenavigator51 application on the DHCT, such that a single “purchase PIN” can be used for the user across multiple applications that deal with purchases. Thecenter portion242 of the title rental accessPIN entry screen240 includes a message requesting PIN entry andseveral blocks243 representing the requisite number of characters to be entered. The user may enter the PIN to access a blocked title with the remote40 (FIG. 7). Upon entry of each character, an asterisk may appear in eachblock243 signifying entry of a character. Once the user enters the PIN, the user may request acceptance of the PIN by inputting the “A” key on remote40 (FIG. 7) as instructed by the PINentry button bar244. The user may also cancel the PIN entry override process, as in step248 (FIG. 5), by entering the “C” key on remote40 (FIG. 7) as instructed by the PINentry button bar239. If the user enters in an improper PIN number instep249, theMOD application client65 returns the user to the presenttitle catalog screen197 as previously discussed.

After the user has selected the desired MOD title for purchase, theMOD application client65 causes theDHCT16 to present the user an “please wait” message, as in step250 (FIG. 6) while the MOD service is being established as described above.FIG. 13 is a display diagram of the please waitbarker253 presented to the user while service is established from theheadend11 to the user'sDHCT16. Establishing service entails setting up a VOD session with the specified VOD content server identified for the title in the catalog. Thebarker253 merely is a pop up window that appears for the duration of the delay that may typically last a few seconds.

Returning toFIG. 6, while the please waitbarker253 is presented to the user, a determination is made whether the MOD session can be established, as shown instep251. The session is established as discussed above if the resources of the system10 (FIG. 1) are available. If resources are unavailable at the time the user desires to view the MOD title, a message is presented to the user stating that the MOD service request cannot be fulfilled at that time, as instep252.FIG. 14 is a display diagram of the MOD serviceunavailable barker252 presented to the user indicating that the purchased MOD title cannot be presented at the requested time. In the embodiment shown inFIG. 14, the user is informed to try again later; however, in another embodiment, the user may be provided an opportunity to receive the MOD service at some point in the future by reserving the selected MOD title for a set future time. From the MOD serviceunavailable screen252, the user is presented with thetitle catalog screen197 upon entering a cancel command as instructed in abottom portion254.

If a session is available for transmitting the MOD title from theVOD content server22 to theDHCT16, the user is presented a help screen (actual help screen not shown) with the title purchased, as instep257, prior to presenting the MOD title ondisplay31. This screen may include instructions about how the remote unit40 (FIG. 7) controls the presentation of the MOD title if such functions (ie., stop, fast-forward, rewind, pause, etc.) are enabled. Thereafter,MOD application client65 directs theoperating system46 in theDHCT16 to tune the MPEG program specified in the session resource, as in step258 (FIG. 6). TheDHCT16 then presents the user the video associated with the purchase title with additional MOD VOD stream control (i.e., stop, fast-forward, rewind, pause, etc.), as in step259 (FIG. 6), if the additional support functions are enabled by the chosen rental option.

In one embodiment, before the rented MOD title is actually presented to the user, promotional material may be presented to the user prior to the rented MOD title. Associated with a rental option may be a set of movie trailers, each with their own asset ID. TheMOD application client65 initiates a session for each of them with the specified VOD content server22 (FIG.2). Typically the VOD stream control functions are disabled during trailers, as specified by the system operator in the rental option. The movie trailers are similar to movie trailers shown in movie theaters prior to the presentation of the feature presentation and are comprised of pre-edited segments of the entire movie or MOD title. Depending on the theme category of the rented MOD title, theMOD application server19 may provide a sequence of movie trailers in the same theme as the rented MOD title. As a non-limiting example, the sequence of movie trailers may be coming attractions of MOD titles soon to be offered by the cable service provider.

In another embodiment, theDHCT16 enables the user to reserve rental of a future MOD title presented as a trailer prior to the rented MOD title as described above. In this embodiment the reservation of future rentals would be made at a time when the MOD title to be rented in the future is not currently available. Thus, in a non-limiting example, the user, upon viewing a sequence of trailers of coming attraction MOD titles, may immediately reserve rental of one of the MOD titles shown in the trailer sequence for future viewing after the MOD title has been made available for rental. This advance rental provides the user priority for the time reserved for future viewing and insures that the system resources are available for at least fulfilling this rental request. Another non-limiting example enables the user to simply request notification of future release of a MOD title included in a sequence of trailers presented prior to the presentation of a rented MOD title. Thus, the user may receive a notification barker (not shown) instructing the user that the MOD title is now available for rental at the convenience of the user. In this non-limiting example, bandwidth is not reserved for the user at a given time, but instead, the user is prompted that a previously unavailable MOD title is now available for rental. Consequently, each reservation or request about a MOD title made by a user is communicated from the DHCT16 to theheadend11 and stored in a memory (not shown). The future title reminders are transmitted to theMOD application server19 by theMOD application client65 via the UDP socket as described previously for other user customizations.

When the end of the MOD title is reached or the time allotted for viewing the MOD title has expired, theDHCT16 presents the user with a message denoting that the rental period is over or that the MOD title has ended, as instep260.FIG. 15 is a display diagram of the rentalperiod end screen260 presented to the user when the duration of the rental period has expired. Upon entering the cancel command through remote40 (FIG. 7) as instructed by the rentalperiod end screen260, the user returns to the MOD title catalog screen197 (FIG. 5).

As an additional alternative, the user may prematurely end rental of the MOD title prior to expiration of the rental duration by stopping play of the MOD title and choosing an option to terminate the rental.FIG. 16 is a display diagram of the endmovie rental screen264 presented to the user when providing the opportunity to prematurely end rental of a MOD title prior to expiration of the rental duration. If the user selects the “SEL” key on the remote40 (FIG. 7) as instructed in the endmovie rental screen264, the rental of the selected MOD title is terminated and the user is returned to the MOD title catalog screen197 (FIG. 5) where the user may opt to exit the MOD application completely. If the user selects the cancel option as provided in the endmovie rental screen264, the user is returned to the presentation of the MOD title. If the user prematurely cancels the rental of the MOD title before a pre-configured time set by a system operator at the headend through a GUI (FIG. 22), the user will not be charged for rental of the MOD title. As a non-limiting example, the user may decide after watching a purchased MOD title for three minutes to cancel the rental. If the pre-configured time to cancel without charge had not expired, the user would not pay for the MOD title rental.

TheMOD application client65 may also present the user other barkers informing the user of other conditions prior to and during rental of a MOD title depending on specific situations that may occur. If, as a non-limiting example, a problem occurs during delivery of the MOD title to theDHCT16 that causes an interruption in the service, a message may be presented to the user instructing the user of the problem.FIG. 17 is a display diagram of the MODservice problem barker265 presented to the user informing of the user of a problem in the delivery of the purchased MOD title. The MODservice problem barker265 may include a cancel option enabling the user to exit the MOD application completely and implement other services while the MOD service is temporarily disabled.

If upon attempt to initially access the MOD channel, the system operator has defined a conditional access descriptor regulating access to the MOD service, and thenavigator application51 on theDHCT16 determines that the conditional access package has not been transmitted to theDHCT16, thenavigator51 will display anunauthorized barker267 instead of activating the MOD service.

If during session setup theMOD application server19 is notified of a VOD session setup for a particular title and rental option for which the user has been designated by the billing system used by the system operator as unauthorized, theMOD application server19 will use an API of theVOD content server22 with whom the session was created and ask that the session be tom-down because it is not authorized. When the MOD application client is notified that the session has been tom-down because the user is not authorized, theDHCT16 may present the user a MOD rental not authorizedbarker267 informing the user that the user is not authorized to receive MOD rentals and to contact the system operator.FIG. 18 is a display diagram of the MOD rental not authorizedbarker267. As a series of non-limiting examples, reasons for unauthorization of MOD service access may include failure of the user to pay a prior service bill, user election to not receive MOD service, system incompatibility, or other reasons configured by the system operator at theheadend11. The VOD rental not authorizedbarker267 includes a cancel option enabling the user to return to the MOD catalog.

Returning toFIG. 5, the user, upon accessing theMOD application client65 the user may already have current rentals. The first time the MOD application is activated, it retrieves the information about the user's current rentals in the request for user information described previously. The purchase related information includes a list of title IDs for current rentals and a session ID for each if the MOD application server19 (FIG. 2) knows that the session has not been torn down by theDNCS23 or theVOD content server22. Also returned are any user-configurable parameters that have been stored by theMOD application server19 in its database in response to configuration settings made available via theMOD application client65.

Once theMOD application client65 determines that the user has a current rental, it checks with theDNCS23 to see if the session for that rental is active using the session status request described previously. If the session is active upon this determination instep193, theMOD application client65 causes theDHCT16 to present the user a current rental screen. If the session is not active, another MOD session may be established. In a non-limiting example, the user is enabled to rent multiple MOD titles at a given time, in which case the session for the most recently viewed title would be established. In another non-limiting example, the user may be activating theMOD application client65 at some time subsequent to a previous rental for completion of viewing of the previously rented MOD title. In another non-limiting example, the user may be re-activating theDHCT16 andVOD application client65 after a power outage that interrupted presentation of the previously purchased MOD title.

FIG. 19A is display diagram of a MOD currentrental screen270 presented to a user under the scenario described above. The currentrental screen270 merely informs the user that a MOD title has previously been rented and that its rental duration has not expired. The lower portion of thedisplay271 displays the MOD title currently rented, the length of the MOD title, and the rental time remaining. The lower portion of the display also provides the user the option to end the rental of the MOD title or to play the MOD title. If the user ends the rental, theDHCT16 presents the endmovie rental screen264 shown inFIG. 16.FIGS. 19B and 19C are both diagrams of alternative embodiments of the currentrental screen270 with increased functionality.

InFIG. 19B, aplay status indication272 is provided depicting a bar graph indication of the point in the MOD title where viewing was last stopped. A “Play From” option graphic273 is included which enables the user to select the re-commencement point of the MOD title presentation. InFIG. 19C, a “Time Remaining”indication272′ is provided which depicts bargraphs for both the playing time (previously viewed time) of the MOD title and the remaining rental period. A “lay Selector” option273 (similar to the “lay From” option inFIG. 19B) is provided to enable the user to select a recommencement point or even to end the rental completely.

As discussed above and as shown instep259 ofFIG. 6, the MOD title may be presented to the user with VCR-like stream control functionality. VOD stream control functionality includes the ability to fast-forward, rewind, pause, stop, etc. Whether a user may utilize these MOD support mechanisms may be determined by the system operator in configuring MOD rental options as described previously, and further by the user in selecting between multiple rental options where some options include VOD stream control functionality and others do not. As a non-limiting example, a system operator at theheadend11 may configure using the MOD application server GUI whether presentation of MOD titles includes MOD support functionality through an interface (FIG. 22) at theheadend11. In bothFIGS. 19B and 19C,image area274 is provided which may be configured as a still image where the MOD title was previously stopped.

FIG. 20 is a display diagram of the VODstream control mechanisms275 as described inFIG. 6 that a user may utilize during viewing of a MOD title. The VOD stream control mechanisms are available fromstep259 fromFIG. 6. If the user depresses a key on remote40 (FIG. 7) representing fast-forward, a fast-forward banner is presented, as described inblock276 to the user ondisplay31, and theDHCT16 presents a fast-forward video stream. The fast-forward video stream may or may not be a separate video stream from the real-time video stream presented in normal play mode. The MOD application client, upon receiving a fast forward request, initiates a request to the VOD content server22 (FIG. 2) to receive the fast-forward video stream rather than the play stream or to merely expedite the play stream. This request is a UDP/IP message to the IP address and port number of the VOD content server video pump that is returned to the MOD application client as a resource in the session setup confirmation (described previously). If the user initiates a command to return to play video stream, theDHCT16 initiates the same process with theVOD content server22 in reverse to return to real-time play mode.

If the user enters depresses a key on remote40 (FIG. 7) representing a rewind function, a rewind banner, as described inblock277, is presented ondisplay31 and theDHCT16 presents a rewind video stream. As described with the fast-forward stream above, the rewind video stream may or may not be a separate video stream from the real-time video stream. When the user returns to playing the video stream in real-time, therewind banner277 is removed.

At any time in the presentation of the MOD title on thedisplay31, the user may stop the presentation of the video stream. Upon entry of a stop command on remote40 (FIG. 7), theDHCT16 presents a stop banner, as described inblock278, and the presentation of video on display is stopped by directing theVOD content server22 to stop the stream. After the video is stopped, theDHCT16 presents the MOD currentrental screen270 as described above and shown inFIG. 19. As described below, theMOD application client65 may activate a screen saver after the MOD currentrental screen270 has been displayed on thedisplay31 for a pre-configured (FIG. 22) amount of time to prevent the image of the MOD currentrental screen270 from becoming burned into thedisplay31.

Depressing a key on remote40 (FIG. 7) representing a play function causes theDHCT16 to display a “play” banner on thedisplay31, as described inblock279. Upon presenting the play banner, the video is played at real-time speed as discussed above and the play banner is removed after a few seconds thereafter, as depicted inblock281.

If the user desires to pause the playing of the MOD title, a command on remote40 (FIG. 7) may be initiated by depressing a key representing “pause”. When theMOD application client65 on theDHCT16 receives the command to pause the presentation of the MOD title ondisplay31, the pause banner is presented, as depicted instep282, the pause command is sent to theVOD content server22, and a freeze-frame image of the video where it was stopped in the video stream is presented on thedisplay31. After the video stream has been paused for a pre-configured amount of time, block284 depicts that thepause banner282 is removed and the video is stopped. A stop banner is presented similarly as described above in reference to block278. TheMOD application client65 may activate a screen saver after the MOD currentrental screen270 has been displayed on thedisplay31 for a pre-configured amount of time to prevent the image of the MOD currentrental screen270 from becoming burned into thedisplay31. The screen saver function is described in more detail below.

Other inputs on the remote40 (FIG. 7) or other input device may also represent functionality that is applicable to the presentation of a MOD title, as shown inblock285. Upon entry of one of these other keyed inputs, a banner may appear ondisplay31 indicating the appropriate action corresponding to the input. As a non-limiting example, pressing the “INFO” button on the remote40 (FIG.7) directs theMOD application client65 to display a graphic showing the elapsed time in the movie and the rental time remaining.

If a still image is maintained on thedisplay31 for a pre-configured amount of time, theMOD application server65 may invoke a screen saver function to protect thedisplay31 from a burn in effect that can occur if an image remains on a display too long. The still screen, as a non-limiting example, may be the currentrental screen227 as described above in regard to the stop and pause functions, or the still screen may be any other image that does not change with time. The system operator at theheadend11 may configure the MOD application to include a screen saver that may be activated after a set time has expired. The screen saver may comprise a sequence of still screens that may be advertisements, announcements or other information capable of display on a still screen. The sequence of still screens may be displayed in a rotation that enables each screen to be displayed for some configurable time period before the next still screen is displayed.FIG. 21 is a diagram of a non-limiting example of a sequence of still screens287 that may comprise a screen saver operation. In this non-limiting example, a series of still screens288a-288hrotate in succession.

In another embodiment, the screen saver is presented as a video stream that, as a non-limiting example, is a set of movie trailers of movies currently available for rental in the MOD title catalog screen197 (FIG. 8B). In this non-limiting example, theDHCT16 tunes the MPEG stream containing the trailers, with the frequency and program number being passed to theMOD application client65 in the service parameter data. Thus, in this non-limiting example, if the user has stopped the presentation of the MOD title and walked away, theDHCT16, after a pre-configured amount of time, tunes thedisplay31 to a channel of movie trailers. The movie trailers, as described above, are pre-edited segments of MOD titles (movies, etc.) that are, for example, new releases or coming attractions and are continuously presented until the user presses a key on remote40 (FIG. 7). Upon hitting any remote40 key, the user is returned to the previous point where the user left off in the MOD application—the MOD current rental screen (which appears when the user stops the presentation of a MOD title).

In yet another embodiment, the screen saver may be configured by the system operator, through an interface on the MOD application server at theheadend11, to be some type of moving image. As a non-limiting example, the system operator may configure the MOD application to display a logo of the cable service provider to the user as the screen saver.

Because of the possible limited resources available for MOD title presentation (i.e., bandwidth, number of streams supported by MOD content server21 (FIG. 2), number of streams per title, number ofMOD content servers21, etc.), the user is typically offered a limited amount of time to view the rented title. This period is described above in regard to the rental options screen227 (FIG. 10). Rented duration time is typically be longer than the length of the MOD title to allow the user to use the VOD stream control mechanisms described above, but that may not always be the case. As a non-limiting example, the user, via a chosen rental option, may purchase a MOD title to be displayed in its entirety without any interruption generation by the user similar to a conventional movie theater. However, it is more common that the rental period is longer that the MOD title length to enable access to the VOD stream control mechanisms. Different play options enable the user to implement the VOD stream control mechanisms while still having the opportunity to view the MOD title in its entirety.

In one embodiment, the user is informed by a display barker (not shown) at the beginning of the presentation session of the purchased MOD title of the time to finish the viewing of the MOD title. However, the user has full and free control of the VOD stream control mechanisms, as described above and inFIG. 20 throughout the rental duration. It is the responsibility of the user to view the program before the expiration of the rental duration. Thus, if the user rewinds the video stream to a point where the new time remaining to play the remaining video stream is greater than the remaining rental duration and plays from that point, the user will not be able to view the entire MOD title. Similarly if the user stops the presentation of the MOD title and commences playing the MOD title such that the remaining presentation time is greater than the remaining rental duration, the user will not be able to view the entire MOD title. No other message is presented to the user other than the initial display barker and the rental period end screen260 (FIG. 15) once the rental duration is complete.

Another embodiment is that the user is afforded full and free control of the VOD stream control mechanisms as described above and as shown inFIG. 20 throughout the rental duration. If the time remaining in the rental duration becomes equal to the remaining length of the MOD title, a warning barker (not shown) is presented to the user informing the user that the time remaining in the rental duration is insufficient to view the remaining MOD title to completion. After the user has been alerted by the warning barker, the user may still activate the VOD stream control mechanisms, but the entire MOD title cannot be viewed in its entirety. An alternative embodiment to this embodiment affords the user an opportunity to purchase additional rental time for viewing the remaining MOD title. A extra time purchase barker (not shown) may be presented to the user as part of the warning barker enabling the user to purchase sufficient additional time to complete viewing the MOD title.

Still another embodiment allows the user to utilize the VOD stream control mechanisms during a MOD period that is the calculated difference between the remaining rental duration and the remaining presentation length. While the MOD period is not equal to zero, the user is enabled to utilize all VOD stream control mechanisms as described above; however, when the MOD period does expire (become zero), the user is no longer enabled to use certain VOD stream control mechanisms unless the MOD period again becomes greater than zero. As a non-limiting example, if the MOD period expires, the rewind, stop and pause functions would no longer operate because otherwise the user would not be able to view the MOD title in its entirety because the remaining rental duration is insufficient. The user could still use the fast-forward function since this would operate to make the remaining rental duration greater than the remaining title length (i.e., a MOD period greater than zero). Thus, once the user fast-forwards the MOD title thereby making the MOD period greater than zero, the previously inoperative VOD stream control mechanisms (i.e., stop, rewind, and pause) would operate again.

If the user tunes to a channel other than the MOD channel that is presenting the purchased MOD title, or if the user powers off the DHCT, the stop mode is automatically entered . In one non-limiting example, if the MOD period does not expire before the returns to the MOD channel of the MOD title, presentation of the MOD title resumes where it was stopped. In another non-limiting example, if the MOD period does expire before the user returns to the MOD channel presenting the MOD title, the MOD title resumes streaming to theDHCT16 even though theDHCT16 is tuned to another channel and the user is alerted by a resume barker (not shown) of the MOD title presentation resumption. If, in another non-limiting example, the user returns after expiration of the MOD period, the presentation of the MOD title is resumed at the point in the MOD title such that the MOD title ends at the end of the rental duration thereby causing a middle portion of the MOD title to be unviewed by the user. Regardless of the different embodiments involving the MOD period, if the user returns to the MOD channel after the rental duration has expired, the MODtitle catalog screen197 is displayed and no portion of the MOD title is viewed.

Calculation of the MOD period, remaining title length, and rental period remaining are determined as follows. TheMOD application client65 stores in memory on theDHCT16 the time at which the MOD title is purchased. It also stores the rental option, which includes the rental duration. Thus, at any time theMOD application client65 can calculate the time remaining in the rental period.

TheVOD content server22 provides an API for theMOD application client65 to request the normal play time (NPT) value of a video stream being played. Based on this information and the duration of the title (stored in the catalog), theMOD application client65 can calculate at any given time the remaining title length. Alternatively, theMOD application client65 can calculate the NPT based on the time of the last stream control operation and the rate at which the VOD content server is playing the stream.

TheMOD application client65 can then calculate at regular intervals such as once per minute the VOD period equal to the rental time remaining minus the remaining title length. During the rewind stream control operation, this calculation is done more frequently based on the rate of rewind that was specified to theVOD content server22. In this case theMOD application client65 can calculate the NPT based on NPT at initiation of rewind, rate of rewind, and duration of the rewind operation. This allows theMOD application client65 to recomputed the VOD period at a constant interval of for example 60 NPT seconds. As a non-limiting example, if the rewind rate is 30 times the normal play rate the VOD period would be recalculated every 2 seconds (60 seconds divided by 30) to be effectively reevaluating the VOD period every 60 seconds of movie being streamed out of the VOD content server.

Alternatively, theMOD application client65 can pre-compute the point in the stream during rewind that will cause the VOD period to drop below zero and request that theVOD content server22 stop rewinding the stream at that point.

The system operator may configure, using the MOD application server GUI, parameters that determine when a session ends if the user interrupts the presentation of a MOD title. In one embodiment, the system operator may, via an interface (not shown), configure a session to be maintained for the entire rental duration even during the portion of the rental period when the user is not viewing the MOD title. This non-limiting example maintains the bandwidth for the user regardless of other system constraints or requests. In another embodiment, the system operator, through the interface at theheadend11, may configure the session providing the MOD title to be torn down after a pre-configured time. The pre-configured time may be based upon certain user input or some user inactivity. As a non-limiting example, if the user stops the presentation of a MOD title and the pre-configured time of inactivity expires, the session established to deliver the MOD title to theDHCT16 of the user may be tom down as described above. When the user returns to the MOD channel theMOD application client65 determines that there is a current rental but that no session exists. It then follows the steps described previously to set up a session with theVOD content server22. If this session fails and the rental period is still active, theMOD application client65 retries the session setup and different intervals based on the reason for the session setup failure. Additionally, a problem barker is displayed informing the user that the MOD service cannot be re-established and that the MOD application is retrying.

IfDHCT16 power is lost during MOD title viewing one of two scenarios may occur. First, for a power glitch whereby theDHCT16 immediately reboots and the user subsequently tunes to the MOD channel, the session for the MOD title will still be playing. Thus, the MOD application client will discover from the MOD application server that the user has a current rental and will then verify with the VOD content server that the session is active. Hence, when the MPEG frequency and program information is retrieved from theDNCS23 session and resource manager for that session, the stream will have been playing during the elapsed power outage time and the user will rewind the movie to view the portion they missed.

For a longer term power outage, the session and resource manager in theDNCS23 will determine that theDHCT16 is no longer responding to the session status request as described previously. The session will be torn down and theMOD application server19 will be notified of the session tear-down and record the fact that there is no session for that user and title in the database. Then, when theDHCT16 is powered-up and the MOD service activated, theMOD application client65 will be told that no session currently exists for the current rental.

A system operator interface may enable the system operator to configure presentation of promotional information such as movie trailers or previews upon user requests for information about a MOD title. As described above in regard toFIG. 8A, the system operator may configure the MOD title catalog display to present an option for the user to view a preview or trailer of the MOD title if the user requests “INFO” about a particular MOD title. The preview or trailer may be configured, through the interface, to appear in a reduced portion of the MOD title catalog screen or in a full screen format.

Additionally a system operator interface (not shown) for promotional information may enable a system operator to configure different areas of various screens, as described above, for example, the MODtitle catalog screen197. In one embodiment, the system operator can configure brand graphics to appear on the display screens mentioned above. Brand graphics may include graphics identifying the cable service provider. As a non-limiting example, a brand graphic298 inFIG. 19C identifies the cable service provider as “Victory Cable”. In this non-limiting example, the brand graphic includes an image logo with the identifying information “Victory Cable”. Thus, the system operator, through an interface, can cause the brand graphic298 to be shown on any MOD display screen wherein the brand graphic is a separate image file typically stored onBFS server28 that is accessed whenever a user activates the MOD application.

In an alternative embodiment, the advertising graphics that appear in the MOD screens may be provided by an external operator located at another physical location apart fromheadend11. The system operator, in this embodiment, configures the MOD application, through the interface, to implement advertising graphics in the MOD display screens broadcast to theDHCTs16 from theBFS28 that are stored externally to thecable television system10. As a non-limiting example, advertising graphics stored externally to the cable television system may be accessed by a universal resource locator (URL), for example, across the Internet for implementation in the MOD display screens. Thus, each time theMOD application client65 attempts to retrieve an advertisement according to a pre-configured URL, a different advertisement graphic may be obtained from the external provider of the graphic so the user always sees different advertisements. In this embodiment, APIs (application programming interfaces) are provided to the external advertising graphic providers to enable compatibility with the MOD display screen configurations. Moreover, this embodiment enables advertisements to be quickly updated and tailored to the interests of an individual user or group of users.

A user may access theMOD application client65, as described above, from a “trailer channel” if the user desires to purchase the MOD title corresponding to a particular trailer on the display. This configuration of the MOD service is indicated to theMOD application client65 uses facilities of theoperating system46 to tune to the specified QAM frequency and MPEG program to display the trailers. The title ID about which trailer is currently playing is carried in an MPEG private data PID synchronous with the MPEG video and audio. TheMOD application client65, upon a user input initiated during a particular trailer presentation, would set thedisplay31 to the MODtitle catalog screen197 with the MOD title corresponding to the particular trailer highlighted. The user could then purchase that particular MOD title in a manner as described above.

As an alternative embodiment, the trailer channel may actually be a plurality of trailer-type channels configured according to style, genre, theme, etc. As a non-limiting embodiment, theMOD application server19 may be configured to support a comedy trailer channel wherein all trailers advertise MOD titles that are comedies, a drama trailer channel for dramatic MOD titles, etc. Just as above, the user, upon viewing a trailer in any one of these trailer channels may, upon input by remote40 (FIG. 7) go to the MOD title catalog screen with the MOD title corresponding to the trailer highlighted for purchase.

FIG. 22 is a non-limiting example of asystem operator GUI295 for configuring some of the previously described configurable parameters. In this non-limiting example, theGUI295 enables the system operator to configure the duration between pause and stop modes. Additionally, the system operator may configure the time duration for tearing down a session after user inactivity, as described above. A time parameter, in this non-limiting example, may be set to notify the user prior to tearing down a session. The system operator may configure a time parameter wherein the user may cancel a rental of a MOD title. The length of preview of a MOD title may also be configured by setting a time parameter. Finally, in this non-limiting example, the system operator may determine which title category is initially shown to the user. Alternatively, a system operator may, through a GUI as described above, define bandwidth limitations forindividual DHCTs16 to limit the bandwidth assigned to any oneDHCT16 and thereby the number of MOD title rentals at a time.

The present invention describes theMOD application server19 andclient65 as a system that delivers media to the user of theDHCT16 where the media described is typically movies; however, it is not the intent to limit the present invention merely to a system that delivers video (i,e.movies) only. It should be clear that the MOD application may be implemented to deliver any type of visual and aural media to the user of theDHCT16. As a non-limiting example, the headend11 (FIG. 1) and DHCT16 (FIG. 3) may be implemented by the MOD application to provide music-on-demand, stock quotes on-demand, television programs on-demand etc. TheMOD application server19, in this alternative embodiment, is a media on demand server that manages all media-type requests as demanded and coordinates the appropriate components in theheadend11 to provide the service on-demand. Thus, theVOD content manager21 would operate to provide the video-on-demand service, and other media-type content managers may be employed (i.e., Stock quotes-on-demand content manager, etc.) would provide that media type on-demand. Thus video-on-demand is but one type of media that is deliverable on-demand in the manner consistent with the present invention.

The MOD application, which comprises an ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In the context of this document, a “computer-readable medium” can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer readable medium can be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific examples (a nonexhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM) (electronic), a read-only memory (ROM) (electronic), an erasable programmable read-only memory (EPROM or Flash memory) (electronic), an optical fiber (optical), and a portable compact disc read-only memory (CDROM) (optical). Note that the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, and then stored in a computer memory.

The flow charts described above and shown in the figures of the present invention show the architecture, functionality, and operation of a possible implementation of the present invention. In this regard, each block represents a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order.

It should be emphasized that the above-described embodiments of the present invention, particularly, any “preferred embodiments” are merely possible examples of the implementations, merely setting forth for a clear understanding of the principles of the inventions. Any variations and modifications may be made to the above-described embodiments of the invention without departing substantially from the spirit of the principles of the invention. All such modifications and variations are intended to be included herein within the scope of the disclosure and present invention and protected by the following claims.