US20120133834A1 - Channel changer in a video processing apparatus and method thereof - Google Patents
Channel changer in a video processing apparatus and method thereofDownload PDFInfo
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- US20120133834A1 US20120133834A1US13/367,054US201213367054AUS2012133834A1US 20120133834 A1US20120133834 A1US 20120133834A1US 201213367054 AUS201213367054 AUS 201213367054AUS 2012133834 A1US2012133834 A1US 2012133834A1
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- channel
- user input
- channel selection
- video processing
- video signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/482—End-user interface for program selection
Definitions
- the present inventionrelates to a video processing apparatus and a video processing method, and more particularly, to a video processing apparatus and a video processing method capable of performing a channel change rapidly.
- a video processing apparatus like TV and a set-top box for TVreceives a video signal such as public broadcasting, cable broadcasting, and satellite broadcasting, performs video-processing suitable for the received video signal, and displays a video based on the processed video signal.
- the video processing apparatusreceives a video signal through one of a plurality of channels which is selected by a user.
- the process in which the video processing apparatus receives a video signal through one of the plurality of channelsis called tuning.
- FIG. 1is a flow diagram illustrating a video signal tuning operation performed by a conventional video processing apparatus.
- a userselectively inputs one of a plurality of channels through an inputting device like a remote control (not shown) in a video processing apparatus (S 11 ).
- a channelis selected through a channel up/down button provided in the remote control.
- the video processing apparatusdisplays a channel number indicating a selected channel on a display part (not shown), for example, in the form of an OSD (on-screen display) so that the user can recognize which channel is selected (S 12 ).
- the video processing apparatustries to perform tuning with regard to a video signal of the selected channel (S 13 ).
- the video processing apparatusperforms tuning with reference to a frequency corresponding to the selected channel.
- the video processing apparatusdetermines whether the tuning for the video signal of the selected channel is finished (S 14 ). When it is determined that the tuning is not finished, it continues to perform tuning. When the tuning is determined to be finished, the video processing apparatus performs video processing suitable for the tuned video signal and displays a video based on the processed video processing on a display part (S 15 ). Then, the video processing apparatus returns to the first stage and repeats the same operations according to a channel selection by the user.
- a video processing apparatuscomprising a signal receiving part receiving a video signal through one of a plurality of channels, a user inputting part in which the channel is selected and inputted by a user, a video processing part processing the video signal received by the signal receiving part, and a controller controlling the signal receiving part to start receiving a video signal through a first channel upon the first channel selection among the plurality of channels by the user, and to start receiving a video signal through a second channel upon the second channel selection among the plurality of channels by the user, wherein the second channel selection is made during the receiving process of the first channel.
- the video processing apparatusis a television receiver.
- said television receiverfurther comprises of a display screen.
- said television receiveris a cable broadcast receiver.
- the start of receiving of the video signal through a second channeloccurs before a start of display of OSD indicating the first channel number and/or name.
- the start of receiving the video signal through the second channeloccurs after a predetermined time reference has passed from the time when the first channel was selected by the user.
- the predetermined reference timeis equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- the predetermined reference timeis less than the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- the predetermined reference timeis selectable by the user
- the selection of the predetermined reference timeis made through an OSD.
- the video processing apparatusfurther comprises an OSD generating part generating OSD data indicating the channel for the video signal, wherein the video processing part processes the OSD data so that a video based on the OSD data generated by the OSD generating part can be displayed, and the controller controls the OSD generating part and the video processing part so that a video based on the OSD data corresponding to a channel selected by the user can be displayed.
- a video processing methodcomprising determining whether a first channel is selected among a plurality of channels by a user, starting receiving of a video signal through the first channel upon the selection of the first channel, determining whether a second channel is selected among the plurality of channels by the user, starting receiving a video signal through the second channel upon the second channel selection, and processing a video signal received through the second channel wherein the second channel selection is made during the receiving process of the first channel.
- the video processing methodis incorporated in a television receiver.
- said television receiverfurther comprises of a display screen.
- said television receiveris a cable broadcast receiver.
- the start of receiving of the video signal through a second channeloccurs before a start of display of OSD indicating the first channel number and/or name.
- the start of receiving the video signal through the second channeloccurs after a predetermined time reference has passed from the time when the first channel was selected by the user.
- the predetermined reference timeis equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- the predetermined reference timeis less than the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- the predetermined reference timeis selectable by the user.
- the selection of the predetermined reference timeis made through an OSD.
- the video processing methodfurther comprises generating OSD data indicating the channel, and processing the OSD data so that a video based on the generated OSD data can be displayed.
- a video processing methodcomprising determining whether a first channel is selected among a plurality of channels by a user, receiving a video signal through the first channel, determining whether a second channel is selected among the plurality of channels by the user during the receiving process of the first channel, receiving a video signal through the second channel in accordance with the determination of the second channel selection, and processing a video signal received through the second channel, wherein the receiving of the video signal through the second channel occurs predetermined reference time after the selection of the first channel by the user.
- the predetermined reference timeis equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- FIG. 1is a flow diagram illustrating a video signal tuning operation performed by a conventional video processing apparatus.
- FIG. 2is a block diagram illustrating a configuration of a video processing apparatus according to an embodiment of the present invention.
- FIG. 3is a flow diagram illustrating a video processing method according to an embodiment of the present invention.
- FIG. 4is a flow diagram illustrating a video processing method according to another embodiment of the present invention.
- FIG. 2is a block diagram illustrating a configuration of a video processing apparatus 100 according to an embodiment of the present invention.
- the video processing apparatus 100receives a video signal for public broadcasting, cable broadcasting, satellite broadcasting or the like and performs video processing suitable for the received video signal to display a video based on the processed video signal.
- the video processing apparatus 100may be provided as TV, set-top boxes or the like.
- the video processing part 100comprises a signal receiving part 110 , a video processing part 120 , a display part 130 , a user inputting part 140 , an OSD generating part 150 , an information storing part 160 , and a controller 170 .
- the signal receiving part 110receives a video signal of public broadcasting, cable broadcasting, satellite broadcasting or the like.
- the signal receiving part 110may be provided as a tuner.
- the signal receiving part 110performs tuning of video signals corresponding to one of a plurality of channels.
- the signal receiving part 110starts and finishes tuning the video signal for a channel selected by a user according to control by the controller 170 .
- the signal receiving part 110performs tuning a video signal with reference to a frequency corresponding to the channel selected by a user.
- the video processing part 120processes the video signal so that a video can be displayed on the display part 130 according to the video signal received by the signal receiving part 110 .
- the video processing part 120can perform decoding for extracting video information from the inputted video signal, scaling for controlling resolution of the video signal decoded according to a characteristic of the display part 130 and user' s setting, and processing for enhancing a video signal quality (referred to as a picture enhancement).
- the video processing part 120is preferable to perform a video processing suitable for the characteristics of an inputted video signal and the display part 130 .
- the display part 130is displayed a video based on the video signal processed by the video processing part 120 .
- the display part 130may be provided as a CRT (cathode ray tube), an LCD (liquid crystal display), a PDP (plasma display panel), a DLP (digital light processing) display, an OLED (organic light-emitting diode), an SED (surface-conduction electron-emitter display) and an FED (field emission display) or other types of displays.
- CTRcathode ray tube
- LCDliquid crystal display
- PDPplasma display panel
- DLPdigital light processing
- OLEDorganic light-emitting diode
- SEDsurface-conduction electron-emitter display
- FEDfield emission display
- In the user inputting part 140is inputted a command by a user.
- In the user inputting part 140is inputted one of a plurality of channels selected by a user.
- the user inputting part 140may be provided with a button corresponding to one of the plurality of channels and/or a channel change (increasing or decreasing).
- the user inputting part 140may be provided as a remote control or an operation panel.
- the OSD generating part 150generates OSD data indicating the plurality of channels.
- the OSD datacan indicate channel numbers and channel names.
- the video processing part 120video-processes the OSD data so that a video based on the OSD data generated by the OSD generating part 150 can be displayed on the display part 130 according to control of the controller 170 .
- the information storing part 160is stored data needed for an operation of the controller 170 .
- the controller 170entirely controls the video processing apparatus 100 .
- the controller 170controls the OSD generating part 150 and the video processing part 120 to display the OSD of the selected channel when a user selects and inputs a channel, and controls the signal receiving part 110 to start tuning of the video signal for the selected channel.
- the controller 170determines whether a predetermined reference time has passed since a previous channel was selected. When the new channel is determined to be selected after the predetermined reference time has passed, the controller 170 controls the signal receiving part 110 to stop the present tuning and to start tuning a video signal tuning for the new channel.
- the predetermined reference timemay be set to have a value which is equal to or greater than the time necessary for the OSD, indicating the channel number/name of the previous channel, to be displayed in the display part 130 ; hereinafter referred to as OSD delay time. Given so, the controller 170 ignores user's input of new channel until the OSD indicating the channel number/name of the previous channel is displayed to the user, thereby allowing the user to acknowledge the previous channel number/name before accepting channel change to a new channel. Furthermore, the predetermined reference time may be set to have a value with is less than the OSD delay time. Given so, the controller 170 accepts user's input of new channel, and starts the process for changing to the new channel before the OSD is displayed. Still furthermore, the predetermined reference time may be set to zero, in effect eliminating the feature of delaying the acceptance timing of new channel during the sequential channel change.
- Determination of the OSD delay timemay depend on the particular parts used in the apparatus incorporating the present invention. Actual OSD delay time may be calculated from the known specification or may be measured through testing.
- the predetermined reference timemay be stored in the information storing part 160 to have a value which is at least the OSD delay time, less than the OSD delay time or zero. Alternately, the predetermined reference time may be set by the user. In this case, the OSD generating part 150 is preferable to generate the OSD data of a user interface which can set the predetermined reference time so as to have an option of displaying the channel number/name of the previous channel before accepting sequential channel up/down command or accepting sequential channel up/down command immediately after accepting channel change command of the previous channel.
- the controller 170controls the video processing part 120 to perform video processing for the tuned video signal and to display a video based on the processed video signal on the display part 130 .
- the controller 170may be provided as a computer program operated by a microprocessor such as a CPU.
- FIG. 3is a flow diagram illustrating a video processing method according to the present invention.
- one of a plurality of channelsis selected by a user (S 101 ).
- tuning for the video signal of the selected channelstarts (S 102 ).
- a channel number indicating the selected channelis displayed on a display part as the shape of OSD (S 103 ).
- a new channelis selected by the user (S 104 ).
- tuning for the previous channelis stopped, the newly selected channel number is displayed on the OSD (S 102 ), and tuning for the video signal of the newly selected channel starts S 103 .
- FIG. 4is a flow diagram illustrating the video processing method according to another embodiment of the present invention. The steps are similar to FIG. 3 except S 105 , S 202 , and S 203 . That is, in this embodiment, the step for determining whether the predetermined time has passed, after the channel selection command of the previous channel, is not performed. Therefore, upon new channel selection, the process returns to the step for displaying the new channel (S 202 ) and start of tuning for the new channel (S 203 ).
- the video processing apparatusis not limited to TV, but may be applied to a set-top box for TV or any other types of devices incorporating a television tuner having a channel changing function.
- the display part 130 in the above described embodimentmay be omitted.
- the OSD generating part 150may be omitted in some cases.
- a video processing apparatus and a video processing methodcapable of performing a channel change rapidly.
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Abstract
Description
- This application is a Continuation of U.S. patent application Ser. No. 11/602,210 filed on Nov. 21, 2006, which claims priority from Korean Patent Application No. 2005-0114399, filed on Nov. 28, 2005, in the Korean Intellectual Property Office, the disclosures of each of which is incorporated herein by reference.
- 1. Field of Invention
- The present invention relates to a video processing apparatus and a video processing method, and more particularly, to a video processing apparatus and a video processing method capable of performing a channel change rapidly.
- 2. Description of the Related Art
- A video processing apparatus like TV and a set-top box for TV receives a video signal such as public broadcasting, cable broadcasting, and satellite broadcasting, performs video-processing suitable for the received video signal, and displays a video based on the processed video signal. The video processing apparatus receives a video signal through one of a plurality of channels which is selected by a user. The process in which the video processing apparatus receives a video signal through one of the plurality of channels is called tuning.
FIG. 1 is a flow diagram illustrating a video signal tuning operation performed by a conventional video processing apparatus. As shown inFIG. 1 , a user selectively inputs one of a plurality of channels through an inputting device like a remote control (not shown) in a video processing apparatus (S11). Here, it is assumed that a channel is selected through a channel up/down button provided in the remote control.- The video processing apparatus displays a channel number indicating a selected channel on a display part (not shown), for example, in the form of an OSD (on-screen display) so that the user can recognize which channel is selected (S12). The video processing apparatus tries to perform tuning with regard to a video signal of the selected channel (S13). The video processing apparatus performs tuning with reference to a frequency corresponding to the selected channel.
- Next, the video processing apparatus determines whether the tuning for the video signal of the selected channel is finished (S14). When it is determined that the tuning is not finished, it continues to perform tuning. When the tuning is determined to be finished, the video processing apparatus performs video processing suitable for the tuned video signal and displays a video based on the processed video processing on a display part (S15). Then, the video processing apparatus returns to the first stage and repeats the same operations according to a channel selection by the user.
- However, according to the conventional video processing apparatus, until tuning suitable for the video signal of the selected channel is finished after a user selects one of the channels, a new channel selection by the user is not considered. Accordingly, in the case that a channel is sequentially selected by pressing a channel up or down button sequentially, for example, the newly selected channel is ignored while tuning suitable for the video signal of the first selected channel is performed. Hence, there is a problem that the operation of such a conventional video processing apparatus is not suitable for sequential channel changing in a rapid manner, especially in a broadcasting environment like digital broadcasting having increased number of channels to choose from.
- It is therefore an aspect of the invention to provide a video processing apparatus and a video processing method capable of performing a channel change rapidly to solve the above-described problem.
- Additional aspects of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
- The foregoing and/or other aspects of the present invention can be achieved by providing a video processing apparatus, comprising a signal receiving part receiving a video signal through one of a plurality of channels, a user inputting part in which the channel is selected and inputted by a user, a video processing part processing the video signal received by the signal receiving part, and a controller controlling the signal receiving part to start receiving a video signal through a first channel upon the first channel selection among the plurality of channels by the user, and to start receiving a video signal through a second channel upon the second channel selection among the plurality of channels by the user, wherein the second channel selection is made during the receiving process of the first channel.
- According to an aspect of the present invention, the video processing apparatus is a television receiver.
- According to an aspect of the present invention, said television receiver further comprises of a display screen.
- According to an aspect of the present invention, said television receiver is a cable broadcast receiver.
- According to an aspect of the present invention, the start of receiving of the video signal through a second channel occurs before a start of display of OSD indicating the first channel number and/or name.
- According to an aspect of the present invention, the start of receiving the video signal through the second channel occurs after a predetermined time reference has passed from the time when the first channel was selected by the user.
- According to an aspect of the present invention, the predetermined reference time is equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- According to an aspect of the present invention, the predetermined reference time is less than the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- According to an aspect of the present invention, the predetermined reference time is selectable by the user
- According to an aspect of the present invention, the selection of the predetermined reference time is made through an OSD.
- According to an aspect of the present invention, the video processing apparatus further comprises an OSD generating part generating OSD data indicating the channel for the video signal, wherein the video processing part processes the OSD data so that a video based on the OSD data generated by the OSD generating part can be displayed, and the controller controls the OSD generating part and the video processing part so that a video based on the OSD data corresponding to a channel selected by the user can be displayed.
- The foregoing and/or other aspects of the present invention can be achieved by providing a video processing method, comprising determining whether a first channel is selected among a plurality of channels by a user, starting receiving of a video signal through the first channel upon the selection of the first channel, determining whether a second channel is selected among the plurality of channels by the user, starting receiving a video signal through the second channel upon the second channel selection, and processing a video signal received through the second channel wherein the second channel selection is made during the receiving process of the first channel.
- According to an aspect of the present invention, the video processing method is incorporated in a television receiver.
- According to an aspect of the present invention, said television receiver further comprises of a display screen.
- According to an aspect of the present invention, said television receiver is a cable broadcast receiver.
- According to an aspect of the present invention, the start of receiving of the video signal through a second channel occurs before a start of display of OSD indicating the first channel number and/or name.
- According to an aspect of the present invention, the start of receiving the video signal through the second channel occurs after a predetermined time reference has passed from the time when the first channel was selected by the user.
- According to an aspect of the present invention, the predetermined reference time is equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- According to an aspect of the present invention, the predetermined reference time is less than the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- According to an aspect of the present invention, the predetermined reference time is selectable by the user.
- According to an aspect of the present invention, the selection of the predetermined reference time is made through an OSD.
- According to an aspect of the present invention, the video processing method further comprises generating OSD data indicating the channel, and processing the OSD data so that a video based on the generated OSD data can be displayed.
- The foregoing and/or other aspects of the present invention can be achieved by providing a video processing method, comprising determining whether a first channel is selected among a plurality of channels by a user, receiving a video signal through the first channel, determining whether a second channel is selected among the plurality of channels by the user during the receiving process of the first channel, receiving a video signal through the second channel in accordance with the determination of the second channel selection, and processing a video signal received through the second channel, wherein the receiving of the video signal through the second channel occurs predetermined reference time after the selection of the first channel by the user.
- According to an aspect of the present invention, the predetermined reference time is equal to at least the time required for the OSD, indicating the first channel number and/or name, to be displayed on a display screen after the selection of the first channel by the user.
- The above and/or other aspects and advantages of the prevent invention will become apparent and more readily appreciated from the following description of the exemplary embodiments, taken in conjunction with the accompany drawings, in which:
FIG. 1 is a flow diagram illustrating a video signal tuning operation performed by a conventional video processing apparatus.FIG. 2 is a block diagram illustrating a configuration of a video processing apparatus according to an embodiment of the present invention.FIG. 3 is a flow diagram illustrating a video processing method according to an embodiment of the present invention.FIG. 4 is a flow diagram illustrating a video processing method according to another embodiment of the present invention.- Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below so as to explain the present invention by referring to the figures.
- The same elements are given the same reference numerals in various embodiments, and their description may be omitted in some embodiments.
FIG. 2 is a block diagram illustrating a configuration of avideo processing apparatus 100 according to an embodiment of the present invention. Thevideo processing apparatus 100 receives a video signal for public broadcasting, cable broadcasting, satellite broadcasting or the like and performs video processing suitable for the received video signal to display a video based on the processed video signal. Thevideo processing apparatus 100 may be provided as TV, set-top boxes or the like.- As shown in
FIG. 2 , thevideo processing part 100 comprises asignal receiving part 110, avideo processing part 120, adisplay part 130, auser inputting part 140, anOSD generating part 150, aninformation storing part 160, and acontroller 170. - The
signal receiving part 110 receives a video signal of public broadcasting, cable broadcasting, satellite broadcasting or the like. Thesignal receiving part 110 may be provided as a tuner. Thesignal receiving part 110 performs tuning of video signals corresponding to one of a plurality of channels. Thesignal receiving part 110 starts and finishes tuning the video signal for a channel selected by a user according to control by thecontroller 170. Thesignal receiving part 110 performs tuning a video signal with reference to a frequency corresponding to the channel selected by a user. - The
video processing part 120 processes the video signal so that a video can be displayed on thedisplay part 130 according to the video signal received by thesignal receiving part 110. For example, thevideo processing part 120 can perform decoding for extracting video information from the inputted video signal, scaling for controlling resolution of the video signal decoded according to a characteristic of thedisplay part 130 and user' s setting, and processing for enhancing a video signal quality (referred to as a picture enhancement). Thevideo processing part 120 is preferable to perform a video processing suitable for the characteristics of an inputted video signal and thedisplay part 130. - In the
display part 130 is displayed a video based on the video signal processed by thevideo processing part 120. Thedisplay part 130 may be provided as a CRT (cathode ray tube), an LCD (liquid crystal display), a PDP (plasma display panel), a DLP (digital light processing) display, an OLED (organic light-emitting diode), an SED (surface-conduction electron-emitter display) and an FED (field emission display) or other types of displays. - In the
user inputting part 140 is inputted a command by a user. In theuser inputting part 140 is inputted one of a plurality of channels selected by a user. Theuser inputting part 140 may be provided with a button corresponding to one of the plurality of channels and/or a channel change (increasing or decreasing). Theuser inputting part 140 may be provided as a remote control or an operation panel. - The
OSD generating part 150 generates OSD data indicating the plurality of channels. The OSD data can indicate channel numbers and channel names. In this case, thevideo processing part 120 video-processes the OSD data so that a video based on the OSD data generated by theOSD generating part 150 can be displayed on thedisplay part 130 according to control of thecontroller 170. In theinformation storing part 160 is stored data needed for an operation of thecontroller 170. - The
controller 170 entirely controls thevideo processing apparatus 100. Thecontroller 170 controls theOSD generating part 150 and thevideo processing part 120 to display the OSD of the selected channel when a user selects and inputs a channel, and controls thesignal receiving part 110 to start tuning of the video signal for the selected channel. In the case that the user selects a new channel during tuning, thecontroller 170 determines whether a predetermined reference time has passed since a previous channel was selected. When the new channel is determined to be selected after the predetermined reference time has passed, thecontroller 170 controls thesignal receiving part 110 to stop the present tuning and to start tuning a video signal tuning for the new channel. - The predetermined reference time may be set to have a value which is equal to or greater than the time necessary for the OSD, indicating the channel number/name of the previous channel, to be displayed in the
display part 130; hereinafter referred to as OSD delay time. Given so, thecontroller 170 ignores user's input of new channel until the OSD indicating the channel number/name of the previous channel is displayed to the user, thereby allowing the user to acknowledge the previous channel number/name before accepting channel change to a new channel. Furthermore, the predetermined reference time may be set to have a value with is less than the OSD delay time. Given so, thecontroller 170 accepts user's input of new channel, and starts the process for changing to the new channel before the OSD is displayed. Still furthermore, the predetermined reference time may be set to zero, in effect eliminating the feature of delaying the acceptance timing of new channel during the sequential channel change. - Determination of the OSD delay time may depend on the particular parts used in the apparatus incorporating the present invention. Actual OSD delay time may be calculated from the known specification or may be measured through testing.
- The predetermined reference time may be stored in the
information storing part 160 to have a value which is at least the OSD delay time, less than the OSD delay time or zero. Alternately, the predetermined reference time may be set by the user. In this case, theOSD generating part 150 is preferable to generate the OSD data of a user interface which can set the predetermined reference time so as to have an option of displaying the channel number/name of the previous channel before accepting sequential channel up/down command or accepting sequential channel up/down command immediately after accepting channel change command of the previous channel. - When the tuning of the video signal is finished, the
controller 170 controls thevideo processing part 120 to perform video processing for the tuned video signal and to display a video based on the processed video signal on thedisplay part 130. Thecontroller 170 according to the embodiment of the present invention may be provided as a computer program operated by a microprocessor such as a CPU. FIG. 3 is a flow diagram illustrating a video processing method according to the present invention. First, one of a plurality of channels is selected by a user (S101). Then, upon the channel selection by the user, tuning for the video signal of the selected channel starts (S102). Next, a channel number indicating the selected channel is displayed on a display part as the shape of OSD (S103).- Next, it is determined whether a new channel is selected by the user (S104). When it is determined that the new channel is selected, it is determined whether a predetermined reference time has passed since a previous channel was selected (S105). When it is determined that the predetermined reference time has passed, tuning for the previous channel is stopped, the newly selected channel number is displayed on the OSD (S102), and tuning for the video signal of the newly selected channel starts S103.
- When it is determined that the predetermined reference time has not passed at the stage of S105 or the user does not select the new channel at the stage of S104, it is determined whether the tuning of the present channel is finished (S106). When determined that the tuning is not finished, it is determined whether a new channel is selected by the user while tuning is being performed (S104). When it is determined that the tuning is finished, video processing for the tuned video signal is performed and the video is displayed on the display part (S107). Next, the video processing apparatus returns to the first stage and repeats the stages S102 through S107 when a channel is selected by the user S101.
FIG. 4 is a flow diagram illustrating the video processing method according to another embodiment of the present invention. The steps are similar toFIG. 3 except S105, S202, and S203. That is, in this embodiment, the step for determining whether the predetermined time has passed, after the channel selection command of the previous channel, is not performed. Therefore, upon new channel selection, the process returns to the step for displaying the new channel (S202) and start of tuning for the new channel (S203).- The video processing apparatus according to the present invention is not limited to TV, but may be applied to a set-top box for TV or any other types of devices incorporating a television tuner having a channel changing function. In this case, the
display part 130 in the above described embodiment may be omitted. Also, theOSD generating part 150 may be omitted in some cases. - As described above, according to the present invention,
- there is provided a video processing apparatus and a video processing method capable of performing a channel change rapidly.
- Although a few exemplary embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (22)
1. A video processing apparatus, comprising:
a user input unit to receive a user input for channel selection;
a signal receiving unit to receive a video signal from one of a plurality of channels in accordance with the user input for channel selection;
a video processing unit to process the video signal received by the signal receiving unit; and
a controller to command the signal receiving unit to receive a video signal from a first channel upon a first user input for channel selection among the plurality of channels and to receive a video signal from a second channel, which is different from the first channel, upon a second user input for channel selection among the plurality of channels,
wherein if the second user input for channel selection is received before the signal receiving unit receives a video signal from a channel in accordance with the first user input for channel selection or if the second user input for channel selection is received while the signal receiving unit receives a video signal from a channel in accordance with the first user input for channel selection or the video processing unit processes the video signal received from the channel in accordance with the first user input for channel selection before the video signal is displayed on a display screen, the controller commands the signal receiving unit to receive a video signal from a channel of the second user input for channel selection so that the video signal from the channel of the second user input for channel selection is displayed on the display screen, and the video signal from the channel of the first user input for channel selection is not displayed on the display screen although the first user input for channel selection is received by the user input unit.
2. The video processing apparatus according toclaim 1 , wherein the video processing apparatus is a television receiver.
3. The video processing apparatus according toclaim 2 , wherein said television receiver further comprises the display screen.
4. The video processing apparatus according toclaim 2 , wherein said television receiver is a cable broadcast receiver.
5. The video processing apparatus according toclaim 2 , wherein the start of receiving of the video signal from the channel of the second user input for channel selection occurs before a start of display of OSD indicating the first channel.
6. The video processing apparatus according toclaim 1 , wherein if the second user input for channel selection is received within a predetermined reference time from the time when the first user input for channel selection was received and tuning to the first channel is not completed, the second user input for channel selection is ignored,
wherein if the tuning to the first channel is completed within the predetermined reference time, the start of receiving the video signal from the channel of the second user input for channel selection occurs when the second user input for channel selection is received after the tuning to the first channel is completed, and
wherein if the tuning to the first channel is not completed within the predetermined reference time, the start of receiving the video signal from the channel of the second user input for channel selection occurs upon the second user input for channel selection after the predetermined reference time has passed.
7. The video processing apparatus according toclaim 6 , wherein the predetermined reference time is equal to at least the time required for an OSD, indicating the first channel, to be displayed on the display screen after the first user input for channel selection.
8. The video processing apparatus according toclaim 6 , wherein the predetermined reference time is less than the time required for an OSD, indicating the first channel, to be displayed on the display screen after the first user input for channel selection.
9. The video processing apparatus according toclaim 6 , wherein the predetermined reference time is selectable by the user.
10. The video processing apparatus according toclaim 9 , wherein the selection of the predetermined reference time is made through an OSD.
11. The video processing apparatus according toclaim 1 , further comprising an OSD generating unit generating OSD data indicating the channel for the video signal,
wherein the video processing unit processes the OSD data so that a video based on the OSD data generated by the OSD generating unit can be displayed, and
the controller controls the OSD generating unit and the video processing unit so that a video based on the OSD data corresponding to a channel selected by the user can be displayed.
12. A video processing method of a video processing apparatus, comprising:
receiving a user input for channel selection;
receiving a video signal from a first channel upon a first user input for channel selection among a plurality of channels; and
receiving a video signal from a second channel, which is different from the first channel, upon a second user input for channel selection among the plurality of channels,
wherein if the second user input for channel selection is received before the video signal from a channel in accordance with the first user input for channel selection is received or if the second user input for channel selection is received while the video signal from the channel in accordance with the first user input for channel selection is received or while the video signal received from the channel in accordance with the first user input for channel selection is processed before the video signal is displayed on a display screen, the receiving of the video signal from the channel of the second user input for channel selection comprises receiving the video signal from the channel of the second user input for channel selection so that the video signal from the channel of the second user input for channel selection is displayed on the display screen, and the video signal from the channel of the first user input for channel selection is not displayed on the display screen although the first user input for channel selection is received.
13. The video processing method according toclaim 12 , wherein the video processing apparatus is a television receiver.
14. The video processing method according toclaim 13 , wherein said television receiver further comprises of the display screen.
15. The video processing method according toclaim 13 , wherein said television receiver is a cable broadcast receiver.
16. The video processing method according toclaim 13 , wherein the start of receiving of the video signal from the channel of the second user input for channel selection occurs before a start of display of OSD indicating the first channel.
17. The video processing method according toclaim 12 , wherein if the second user input for channel selection is received within a predetermined reference time from the time when the first user input for channel selection was received and tuning to the first channel is not completed, the second user input for channel selection is ignored,
wherein if the tuning to the first channel is completed within the predetermined reference time, the start of receiving the video signal from the channel of the second user input for channel selection occurs when the second user input for channel selection is received after the tuning to the first channel is completed, and
wherein if the tuning to the first channel is not completed within the predetermined reference time, the start of receiving the video signal from the channel of the second user input for channel selection occurs upon the second user input for channel selection after the predetermined reference time has passed.
18. The video processing method according toclaim 17 , wherein the predetermined reference time is equal to at least the time required for an OSD, indicating the first channel, to be displayed on the display screen after the first user input for channel selection.
19. The video processing method according toclaim 17 , wherein the predetermined reference time is less than the time required for an OSD, indicating the first channel, to be displayed on the display screen after the first user input for channel selection.
20. The video processing method according toclaim 17 , wherein the predetermined reference time is selectable by the user.
21. The video processing method according toclaim 20 , wherein the selection of the predetermined reference time is made through an OSD.
22. The video processing method according toclaim 12 , further comprising:
generating OSD data indicating the channel; and
processing the OSD data so that a video based on the generated OSD data can be displayed.
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2608535A2 (en) | 2013-06-26 |
| CN1976405B (en) | 2011-06-15 |
| KR100765961B1 (en) | 2007-10-11 |
| EP2608535A3 (en) | 2013-08-28 |
| US20070121019A1 (en) | 2007-05-31 |
| CN1976405A (en) | 2007-06-06 |
| KR20070055897A (en) | 2007-05-31 |
| US8130327B2 (en) | 2012-03-06 |
| EP1791360A2 (en) | 2007-05-30 |
| EP1791360A3 (en) | 2010-07-28 |
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