CN1917615B - Screen display insert - Google Patents

Abstract

The absence of MPEG processing in a consumer digital recorder player may preclude on-screen message display of recorder status. Various method are disclosed which facilitate the on-screen display of recorder player status messages. A first embodiment returns a reproduced decoded, analog video signal (102) to the digital recorder player (200) for insertion of status messages. In a further embodiment recorder message data (271) is coupled to the digital signal decoder (100) for inclusion with the decoded analog video signal (102). In another embodiment a recorder message command (TAG/CMD) is coupled to the decoder (100) to access recorder specific graphical messages. In yet a further embodiment, recorder message data (271) is tagged and coupled to the decoder (100) to select recorder specific graphical messages if available or to display recorder message data. In yet another embodiment, digital or analog operating mode determines recorder message display position and timing.

Description

On-screen display insertion

Application of the present invention is to be that September 13, application number in 1996 are that of 96197939.9 patent application of the same name divides an application the applying date.

Technical field

The present invention is relevant with the field of digital video record, especially with the various device part between connection relevant.

Background technology

Digital video signal can be processed, and has the bit stream that bit rate reduces so that form.According to the MPEG compression method, can realize that the such processing of this minimizing bit rate can carry out, and can format, for example, but with the compatible structure of a kind of MPEG, such as the sort of structure that in digital satellite system, is adopted, for example DSS^TMMajor Leagues of perhaps being advised or GA terrestrial broadcast system.

Consumer's video tape recorder can be used to provide the registering capacity of analog signal and digitally encoded signal, and this digital signal is for example compatible with mpeg standard, and has GA or DSS^TMSignal format.The consumer's video tape recorder that is adopted can be thought two electronic systems within a box, shared video recording mechanism, servo system, and control system.In the place of analog luminance signal composition frequency modulation(FM) RF carrier frequency while analog chrominance signal composition Modulation and Amplitude Modulation the 2nd RF carrier frequency, can use the conventional simulation recording method.When being reproduced, two signals of being modulated are by demodulation, in conjunction with and be connected to video display.

In record and replay operations mode, displaying information on screen can show the operating state of video tape recorder, alert consitions, and during the tape, writing time, timing code or the like.Information displayed on screen or OSD can be increased to analog video output signal so that to the user video tape recorder state information is provided.

Through utilizing consumer's video tape recorder, can accomplish digital record as a kind of digital code stream register/reproducer.With the bit stream of mpeg compatible, for example transmission package can write down and playback to simplify through transmission package is formatd again by record.For example, transmission package can be buffered with error-detecting and to the digital word that institute calculates and increases and proofread and correct.Code stream with error-detecting can be formatd, to become recording data blocks or to be included in the synchronization blocks of the predetermined bite in each recording track.The synchronization blocks signal can be encoded so that the signal that is more suitable in digital record is provided, and for example, removes any direct current part, and perhaps the signal to record carries out frequency spectrum shaping, and such modulation can produce through the coding of " code book " type.In manner of playback, recording process is reversed effectively, and for example, " code book " encodes decoded, detects and correction error, and removes the synchronization blocks format, becomes the form of original MPEG and so on to recover bit stream.

In order to reduce the fringe cost increment of digital record and regeneration to greatest extent, in video tape recorder, do not comprise mpeg decode and coding.Like this, video tape recorder must be handled the bag stream of MPEG and so on, and does not change or increase.Therefore, video tape recorder provides program to postpone or the time migration setting.Yet, during simulated operation, increase to video tape recorder state and the alarm and the demonstration of tape timer etc. of analog output signal, during the mode of digit manipulation, can not exist.Therefore, through observing the video tape recorder control panel, only can understand the video tape recorder state.

Through using BDB Bi-directional Data Bus, can simplify derived digital signal, system interconnection between video tape recorder and the monitor display and control.Any interconnection meeting that is added on the analogue system brings elusive complexity and confusion to the user.No matter the operating state of video tape recorder how, a kind of simple interconnection of connection need be provided between derived digital signal and display all.Through identical interconnection system, this simple interconnecting method must be simplified the work of analog-and digital-video tape recorder.In addition, video tape recorder state and warning message need show to the user in analog-and digital-video tape recorder working method.

Summary of the invention

Be provided at the recording status that has omitted for some reason under the digital operation mode primely by following creative device, report to the police and tape regularly shows etc.A kind of digital television receiver comprises receiving system, is used for receiving between from first compressed digital video signals of network source and second compressed digital video signals and the display message data from local source and selecting.A kind of decoding device is connected with this receiving system, with one of them compressed digital video signals of decoding, to form vision signal.A form makeup is formatd the video display message with the vision signal combination.A control device is connected to this receiving system; To be controlled at the selection between the one the second compressed digital video signals; And in response to second compressed digital by the selection of frequency signal, the display message data-signal is coupled to the video display message carried out formative formatting mechanism.

A kind of digital device of the digital video representation signal that is used to reset is used to use with the decoder and the display message combiner of digital compression video signal, and this replay device comprises the converter of playback digital video representation signal from the recording medium.The electronic equipment of resetting is connected with the transducer of fast acquisition of digital video representation signal, and the output signal ratio spy who is used to decode with generation flows.The status message generator is in response to the working method of this device, to produce the message data signal.This message data signal is coupled, with format, and by this display message combiner and the vision signal combination of decoding from the special stream of output signal ratio.

Description of drawings

Fig. 1 is the block diagram that includes the signal source that is coupled to decoding and display.

Fig. 2 has shown the example block diagram that comprises various creative embodiment.

Fig. 3 has shown the example block diagram of the simplification switch that comprises various creative embodiment.

Embodiment

Fig. 1 illustrates consumer's DAB video system of simplification.The signal source of packing, the audio frequency and video of compression is shown as with decoder with control data and is connected with display.Receiver IRD100 specially is connected withreception antenna 50, and the signal of modulation also can be provided from the cable distribution network (not shown).The packetized signals of this modulation is by tuning, demodulation, and also the program that the user confirms is separated in the piece that is designated as bag source 109.The output inbag source 109 comprises by the transmission package of the audio frequency and video of mpeg decode and control data stream, to produce the Voice & Video signal by decoder 117.The output ofdecoder 117 is connected to thedisplay 300 that is used to keep watch on.Other packetized signals source with dashed lines is shown as the alternative data flow of being carried out mpeg decode by decoder 117.Thereforedecoder 117 can be used to therefore reduce the cost in other source to decoding from the MPTS in external packets source.For example, the computer of packing output signal can be represented to form in bag source 75.Sort signal can be from computer storage, to extract or produce such as computer network from external source.This computer sources can be from the audio frequency and video and the control data of magnetic disc store regeneration compression.In addition, digital video display can be represented in bag source 75, such as the DVD checker-work.By the magnetic tape reproducing register another transmission package source can be provided,bag source 200, it can have such as with D-VHS or the corresponding form of DVC standard.

Consumer's digital video receiver of simplifying, register and display system are illustrated in the example block diagram of Fig. 2.This system adopts digital video signal source, for example integrated receiver decoder or IRD100, and audio frequency and videomonitor display device 300 and digitalvideo tape recorder 200, this digitalvideo tape recorder 200 for example adopts D-VHS or DVC form.In illustrated system, the digital video representation signal is modulated on the RF carrier wave and byantenna 50 and receives.Antenna 50 is connected with integrated receiver decoder IRD100., the carrier wave of modulation can be provided toreceiver 100 by the cable distribution system (not shown).This integratedreceiver decoder 100 by be tuned to the RF carrier frequency and the transmitting data stream of decoding and mpeg compatible thus.

This transmitting data stream can be decoded, to produce analogue audio frequency and vision signal, to be kept watch on by audio frequency andvideo display 300 immediately.The output signal of this decoding is by being connected receiver, signal 101 between IRD100 and thedisplay 300 and 104 expressions.Considerationdesignation number register 200 to cost does not comprise mpeg encoded and decoding.Thereforedigital recorder 200 plays the function of bit stream register/reproducer, postpones ability so that time migration or program to be provided.The omission that MPEG handles and make and to come and go with degree, the image playback in slow motion or the track manner of playback for simplifying the required complicacy of non-standard rate play capability.Therefore, generally speaking,receiver 100 will be connected to digital A/V bus 112 with the bag of mpeg compatible stream, with by register 200 records.Similarly, come the playback bag stream of self-recorder 200 to send back to receiver, so that mpeg decode produces audio frequency and video.The status message that in register, omits additional consequence that MPEG handles and be display message on the screen or OSD form can not make up or be added in the pack bitstream of playback.Therefore, the operating state of register can not offer the user significantly.

In addition, because just at record, resetting and stopping mode obtaining the register pictorial data, then the user does not know what the response of the control command below the register is.For example change to the rewinding meeting and cause that the image of resetting is such as switching to incoming bit stream from playback; This is known electronics to electronics or E to the E state; Perhaps, the image of for example resetting can disappear and replaced by the freeze frame that IRD produces, and perhaps motion video is mixed captions by color field.Therefore, as the sign of recording mode response, the user is not sure of and knows these visual display effects.

System shown in Figure 2 has shown first creative jockey, and wherein the bit stream of decoding is connected to register 200 from receiver IRD100 through BDB Bi-directional Data Bus 112.This transmission package stream is connected to data/address bus throughinterface 110 and receives at register 200 places by means of receiving 210.This interface is Be Controlled through control data stream, and this data flow is to carry on the separated wires in data/address bus 112.Control signal can be extracted through start-up control switch (not shown) from user input, or the IR remote control command that is produced by the user produces.For example, the user can select to keep watch on the DAB vision signal that is received by antenna 50.Can select this receiver through touch or remote control.The selection of receiver can cause keeping watch on automatically this demonstration to be selected, i.e. this demonstration is automatically switched to the audio frequency and video output of keeping watch on mpeg decode.This user can select digital recording mode, and it can make throughbus 112 and be coupled to register and opening entry from the MPTS that IRD receives.Similarly, select the manner of playback of digital recorder can make the data flow of playback be coupled to thedecoder 117 ofreceiver 100, so that decode throughbus 112.

Be coupled to register 200 with the packetized signals of mpeg compatible and be processed, so that by piece D.REC210 record.A buffer memory is included among the piece D.REC210, and data are flow to row buffering, to set up the signal than the more suitable record of packetized signals that comprises the data pulse with variable interval.Buffered data streams is read from buffer, to form record format synchronization blocks, its available error-detecting correction data word code.The formative data flow of this synchronization blocks can be modulated, so that kind is by record as stated, and is coupled through selector switch A4 from record block D.REC210.D-VCR working method according to selecting is controlled selector switch A4 and A5.For example, shown that in Fig. 2 switch A4 and A5 have digital record contact DR and digital replaying contact DP, be used for data flow is coupled torotary head device 250 or output stream therefrom.For analog operation, switch A4 and A5 adopt another position, AP, analog record and AP emulated for playback.Be coupled to from the formative data flow of the synchronization blocks of D.REC210 and placemagnetic head assembly 250, so as on tape record.

In manner of playback, the formative data flow of the synchronization blocks of record is reproduced from tape by the transducinghead 251 that is positioned on the device 250.The signal that is recovered is by digital replaying piece D.REP220 demodulation, to remove any record channel modulation.By means of the data word of inserting before the record signal of resetting is carried out error-detecting and correction then.After error correction, the synchronization blocks format is removed, and the bit stream that is recovered has identical with the packet format that is coupled to register basically packet format.Bag stream from piece D.REP220 is coupled tointerface 210, and it should wrap stream in response to the manner of playback of register and be coupled to BDB Bi-directionalData Bus 112, so that bydecoder 117 decodings.

100 pairs of bag streams with mpeg compatible of integrated receiver decoder are decoded and are produced video/audio output signal.For example, Fig. 2 illustrates video andaudio output signal 101 and 102 andcomponent video signal 104, for example S-Video., the vision signal of this digital replaying does not have usually by shielding the recording status information that upward demonstration or OSD device provide.

The receiver IRD100 that in Fig. 2, shows with reduced form comprises controller CTRL115, and it provides the The whole control of receiver, and is for example tuning, unwraps head control along separate routes, and EBI is controlled and is coupled to the bag stream ofmpeg decoder 117 and selects.In addition, can indicate the state or the working method of receiver by means of display message on the screen on the vision signal that is added to decoding.Controller 115 can be constructed on the screen display message or read predetermined stored message from memory block MEM510.This screen is gone up display message or OSD is coupled to OSD inserter or adder,piece 520, wherein, this message is formatd so that analog video shows, and be added to or with the vision signal combination of mpeg decode.This video with osd signal is throughoutput amplifier 118 outputs, so that shown bymonitor display 300.

Record reproducing device 200 comprises on-screen display generator in Fig. 2, OSD.GEN270, and it is connected with control system CTRL205.In response to the signal from register controlledsystem 205,osd generator 270 produces state or the warning message that is suitable for condition of work.This message is formatted as vision signal, in piece OSD.ADD275, to be inserted into or to be included in the analog video signal.Analog video signal is coupled to screen from video selector piece SEL.280 and showsadder 275.

Selector 280 is bycontrol system 205 controls and be provided at the selective power between the various simulation signal generators.For example, the signal that switch A1 provides at tuner provides analog input signal to select between the audio frequency andvideo output signal 102 of base-band analog signal input and mpeg decode.The output of switch A1 is connected to piece A.REC, so that record.

The selector switch A3 of SEL280 can provide primely and be coupled to the signal selection that screen is gone up demonstration adder 275.Switch A3 shown in Fig. 2 provides creationary connection, the video composition ofoutput signal output 102 is coupled to the input of the last demonstration of screen adder 275.The status message of the register reproducer 200 that therefore, for example in playback, produces can be added to from thevision signal composition 102 of output transmission package stream decoding.Therefore, can see the replay signal that is added with the mpeg decode that shields the digital form generation of going up message,signal 103 bydisplay 300.

During the analog operation of register reproducer, switch A3 goes up emulated for playback signal VHS and showsadder 275. therefore to screen, and during analog operation, OSD message is added in the emulated for playback vision signal.When selecting digital record, OSD message can advantageously be added to from theanalog video signal 102 of the bit stream decoding reset.Therefore, connect through favourable feedback, recorder status message and video composition make up and export asanalog signal 103.

The switch A2 of selector SEL.280 advantageously provides the bypass screen and goes up the connection that showsadder 275, and allowsoutput signal 102 to be directly coupled to monitor display 300.Therefore the bypass of switch A2 action allows to watch the output signal of decoding and gets rid of because the possibility that 275 pairs of signals of adder reduce.When the standby mode register is closed, maybe when watching non-record " in real time " bit stream of decoding, can automatically select bypass path A2.In order during analog record, to allow to watch the non-tracer signal of decoding, can manually operate this by-pass switch.For example through E/E register passage, this favourable bypass connects has got rid of unnecessary analog recorder signal processing, and itself can damage thesignal 102 that digitlization produces.In addition, this favourable bypass functionality can for example be simplified by Mechanical Contact, allows receiver IRD100 to be connected to monitordisplay 300 such as switch A2, and no matter the operating state ofregister 200.

On-screen display generator 270 produces with specified level and vertical synchronization timing formatted message, and feasible when this message is inserted into vision signal, it is displayed on the precalculated position of display screen., when working in the digital replaying mode and adopt this above-mentioned favourable feedback to connect, the vertical synchronization different with the analog recorder duration of work capable of using regularly advantageously produces OSD message.This different horizontal and vertical synchronization have regularly advantageously compensated inhibit signal diffusion and the mpeg decode delay issue of inreceiver 100, running into.Therefore use different OSD synchronization timings advantageously in the work of analog or digital register, to obtain identical predetermined message position basically.

The time delay of processing and mpeg decode can be accumulated as the period of multiframe.Multiframe postpones or the time migration meeting causes OSD message prior to the visible phenomenon of the playback of reality.The time migration meeting such prior to replay event of register OSD message is rendered as the result of user's control command and the delay of corresponding playback image effect occurs.When displayed record time code signal or register tape timer, this time migration meeting causes bigger problem.For example, during magnetic tape reproducing, from the screen of register tape timer show or writing time coded signal OSD can see special event.The time of being seen allows the position successively of selected incident., if the in-edit of the time of the being seen electronic editing that is used between register, carrying out, the scene of edited result will be located between preview period before the selected scene.Through delay, message produces, message communicating, and tape timer time yardage or counter are revised in appearing or passing through of OSD, and the time migration effect between this message and playback image can advantageously be suppressed.Inregister 200, can be the delay of DLY.207 by switch A7 or A8 selected marker.For example, when thevision signal 102 of decoding is had the register OSD message of inserting atpiece 275 places by feedback,, can produce the instruction of OSD message in response to controller 205.Come the message command signal CMD of self-controller 205 to be illustrated as and be coupled to switch A7 and delay line DLY207.In response to being register 200 selected modes, promptly analog or digital comes control switch A7.Switch A7 is displayed on digital form, and selects the delay version from the signal CMD of delay line 207.This delay instruction signal can cause the generation and the insertion of OSD message, and it overlaps with the vision signal of decoding basically.The device of a replacement has adopted switch A8, and it can be inserted intodelay line 207 in the output of osd generator 270.In this device, switch A7 is connected to the output of controller 205.Switch A8 also can be used for signal CMD is postponed to be coupled tobus 112 and IRD100.In the access signal through retardation ratio such as DLY.116 being incorporated into memory or the output signal of memory, the also time migration between the delay image of recoverable OSD message and decoding in receiver 100.Utilize the whole bag of tricks, for example by means of the delay of using clock data to latch, shift register, one-shot multivibrator or the like can obtain the synchronous of image and OSD of resetting.For example during carrying out the edit mode of preview by the algorithm process that shows number, tape timer or timing code OSD can be synchronous with the image of decoding.Therefore the image that can import selection is digital with identical demonstration, so that accomplish electronic editing.During the analog operation ofregister 200, come the command signal CMD of self-controller 205 not postpone, and switch A7 is directly coupled togenerator 270.

In another creative embodiment, display message can advantageously utilize display capabilities on the screen ofreceiver 100 on the screen that is produced by register 200.The message that register provides can be coupled toreceiver 100 through the pilot of data/address bus 112, inserts so that shield demonstration at the piece OSD520 place of Fig. 2.This register message data can be formatted as word message bygenerator 270, and attaching above that has a mark or label.The word message of mark that is shown as signal 271 is coupled to thecontroller 115 of IRD100, from other control bus data, to separate.The word message that separate the back is coupled, and inserts with video so that carry out display formatization by OSD520.Produce word message in response to the OSD command signal CMD that comes self-controller 205.As stated, atpiece 207 places, signal CMD can be postponed., the word message frompiece 270 can be postponed in thedelay 207 of another point owing to switch A7 insertion.

In another creative embodiment,receiver 100 comprisesmemory 510, and it comprises receiver screen and goes up the specific OSD message of display message and register 200.Go up the special message that idsplay order signal CMD can the access record device in response to register screen, the last idsplay order signal of this screen can be coupled to controller 115 throughcontrol bus.In register 200, produce screen bycontroller 205 and go up idsplay order signal CMD, the also definite in addition message that will produce of controller.Therefore, command signal CMD can advantageously be coupled to 100 pairs of receivers and be stored in the format that the special graphical messages of register in thememory 510 is carried out access and demonstration.

In thereceiver 100 of another creative structure, between register word message or receiver graphical messages, select in response to register instruction adaptability ground.Selection between register literal or IRD graphical messages show allows to have the interconnection of different qualities and the register of setting and various years and receiver.For example, an old receiver can be connected to the register of making recently, and therefore, this receiver memory does not comprise the graphical messages of pre-programmed, comes record support device screen to go up appearing of display message.Therefore this receiver can show the simple text message that is produced by register.On the contrary, the graphical messages of the various products that more modern receiver can be through selecting the various manufacturing age carried out pre-programmed, and these various graphical messages can replace the register word message and are shown.Through appending to sign or the label in the word message, can be reduced at the selection between simple text or the graphical messages.For example, this sign or label can comprise command signal CMD, and it selects and start the special message of needed register.In addition, this label can provide enough capacity, with the characteristic information of announcement recordings device, and the producer of those and register for example, model, version or version height and the relevant information of sequence number.Whencontroller 115 received this literal message with sign or label, this sign or label were translated, and caused fromIRD memory 510, selecting a register special pattern message., if receiver memory special register message of no use or carry out pre-programmed for the specific message of register characteristic then should start format and show additional simple text message by sign.As stated, can insert a delay cell and compensate OSD message, the decoding of literal or figure and playback is the displacement in the time between the decoded picture and space.

Fig. 2 illustrates a monitor display, and it has three input end of analog signal:AV signal 101 and 103, audio frequency and component audio signal 104 (for example S-video), or brightness and chrominance component Y, Pr, Pb.In addition, through radio frequency (RF) signal RF IN,display 300 can receive the Voice & Video signal.Aknown signal selector 310 is coupled to video and synchronous processing circuit (not shown), and it produces image and shows in combination.Start the switch on thedisplay 300 through the user, perhaps start remote control command, with regard to maycommand signal selector 310 through the emission of modulation IR control flows by the user.Through the automatic control ofselector switch 310, can advantageously select illustrated these three base-band input signals.For example, just can automatically select to comprise the input signal of register OSD state display message to the selection of digital record or manner of playback.This recorder status OSD can be produced as described above.In addition, the permission of many baseband signal inputs can allow the interconnection of the special device of function.For example, through using such as output signal 101, orcomponent video signal 103,, just the signal of non-record can be decoded from IRD100 direct viewing easily to form A/V signal 103 with being used for theoutput signal 102 that register OSD inserts.

Fig. 3 illustrates the for example operating position ofdisplay 301 of display that cost reduced.In order to reduce cost, the quantity of signal input part can be restricted to for example RF input, one-component video or S-video inputs and an AV signal input.This outstanding selection of theselector 280 of Fig. 2 and bypass capability allowdisplay 301 to bring in monitor log and material non-record through single A/V input., this demonstration can advantageously utilize component video signal to connect, and outside connecting at signal, definite and control demonstration input is selected.For example, owing to can suppose that component video signal or S-VIDEO signal provide than the better displayed image quality of NTSC code signal, this component signal that is coupled to the component signal input can automatically cause the selection in component signal source.Therefore, when component and component signal were coupled to display 301inputs 1 and 2 respectively, input controller had such logic, and its predetermined component signal of selecting is imported as a reference., this is imported selection automatically and can stop and keep watch on the signal comprise the special information displayed on screen of register that comes fromregister 200 couplings of Fig. 2., this is selected to be advantageously used in the remote control that starts AV signal with reference to input automatically and selects, for example thesignal 103 on the input 2.Through allowing or interrupt output coupledsignal 104, andcomponent signal 104 is carried out creative control, can ondisplay 301, watch the signal that comprises information displayed on screen throughregister 200 couplings from IRD100.For example, the signal that the user selects non-record bit stream promptly to receive will cause thecontroller 115 ofreceiver 100 to begin to produce or export to have the forexample component signal 104 of S-VIDEO form.Selection to the recording picture signal that is used to show will causecontroller 115 interruption generating or output component signal 104.Therefore; The controller 312 ofmonitor 301 is connected to the component signal input; To come the disappearance ofdetection signal 104 throughsignal 309; And makinginput selector 311 switch to theAV signal 103 on theinput 2 for example from thecomponent input signal 104 on the input 1,input 2 is connected to theselector 280 of theregister 200 among Fig. 2.

Claims (5)

1. a digital device (200), being used to reset is stored in the compressed digital video representation signal on the recording medium, and said digital device comprises:

Processing unit (251,220) is used to handle the said digital video representation signal that is stored on the recording medium, to produce the compressed digital video signals stream (221) of an output, to be decoded by a decoder (117);

Status message generator (205/270) is used to produce a message data signal (272) of indicating the working method of said digital device (200);

Display message combiner (275); Has the first input end that is connected with said message data signal (272); With second input that is used for receiving the vision signal (102) of decoding from said decoder (117); So that the vision signal (102) of said message data signal and said decoding is combined, on video-frequency monitor, to show synchronously; And

Delay element; Be connected to said status message generator (205/270); Be used to postpone the generation or the transmission of said message data signal (272); Wherein said delay element provides delay, to compensate the decode time of said decoder, makes said message data signal synchronous with the vision signal of the said decoding that is used for showing synchronously thus.

2. according to the described digital device of claim 1 (200), wherein said status message generator (205/270) is in response to a tape timer or time code signal.

3. according to the described digital device of claim 1 (200), wherein said delay element provides a delay that equals the decode time of said decoder, makes the vision signal of said message data signal and said decoding synchronous thus.

4. according to the described digital device of claim 1 (200), the said message data signal that is wherein produced by said status message generator (205/207) is in response to the command signal that the user produces.

5. according to the described digital device of claim 4 (200), the infrared remote control that the working method of wherein said digital device (200) produces through the user instructs to be controlled.

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