JP2010114747A - Information processing apparatus and program switching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further shorten the time from channel selection to display. <P>SOLUTION: The present invention comprises: a main video processor 3; a sub video processor 4; and a controller 10 in which, when it is recognized that the main video processor 3 selects another broadcast station different from a broadcast station under outputting at present via a remote controller RC for allowing a user to select the broadcast station or the other broadcast station, channel selection processing due to the sub video processor 4, which is not under outputting at present, is started and when it is recognized that the other broadcast station is finally determined via the remote controller RC, the main video processor 3 is switched to the sub video processor 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an information processing apparatus and a program switching method, and is suitable for application to, for example, a television receiver capable of receiving terrestrial digital television broadcasts.

  Conventionally, in a television receiver capable of receiving terrestrial digital television broadcasts (hereinafter referred to as a terrestrial digital television receiver), a program to be selected from a terrestrial digital television broadcast wave received via an antenna is selected. A transport stream is obtained by extracting and decoding the data.

  In the digital terrestrial television receiver, the transport stream is subjected to descrambling processing and filtering processing, and then separated into program video, program audio, and an electronic program guide, and the program video is displayed on an LCD (Liquid Crystal Display). ) And the like, and the program audio is output from the speaker.

In this terrestrial digital television receiver, when displaying an electronic program guide superimposed on a program video, it is possible to easily search for a TV program desired by the user by seamlessly switching the display of the electronic program guide without a sense of incongruity. (For example, refer to Patent Document 1).
JP 2006-313948 A

  By the way, in a terrestrial digital television receiver having such a configuration, a user's operation on a remote controller (hereinafter simply referred to as a remote controller) allows the user to select another broadcast station desired by the user from the TV program of the currently output broadcast station. When switching to a TV program, tuner tuning processing and transport stream analysis processing are required, and thus there is a problem that it takes a long time to complete the channel selection operation.

  In the terrestrial digital television receiver, the next action is predicted when the broadcast station to be selected is sequentially switched in response to the user's continuous pressing operation on the channel up button or the channel down button of the remote controller. There has also been proposed a method of starting tuner tuning processing and transport stream analysis processing in advance based on the prediction result.

  However, in this case, if the prediction result is not satisfied, no effect can be expected, and the terrestrial digital television receiver still has a problem that it takes time for the channel selection operation.

  The present invention has been made in consideration of the above points, and an object of the present invention is to propose an information processing apparatus and a program switching method excellent in usability that can further shorten the time from channel selection to display.

  In order to solve such a problem, the information processing apparatus of the present invention comprises a first tuner and a first decoder. When a broadcast station is selected by the first tuner, the information is decoded by the first decoder. A main processing unit that outputs a program of a broadcast station, a second tuner, and a second decoder. When another broadcast station is selected by the second tuner, it is decoded by the second decoder. A sub-processing unit for outputting a program of another broadcast station, a selection unit for allowing the user to select a broadcast station or another broadcast station, and a broadcast station currently being output by the main processing unit via the selection unit When recognizing that another broadcasting station is selected, the channel selection processing by the sub-processing unit that is not currently outputting is started, and the other broadcasting station is finally determined through the selection unit. When recognized, main processing To be provided and a control unit for switching to the sub-processing unit from.

  As a result, the channel selection process for the other broadcast station can be started by the sub-processing unit at the stage where the other broadcast station is selected but not finally determined. If the output source is switched from the current broadcasting station by the main processing unit to another broadcasting station where the channel selection processing has already been completed by the sub processing unit, the other broadcasting station The time from selecting a channel to displaying a program can be greatly reduced.

  Further, in the program switching method of the present invention, when a broadcasting station is selected by the first tuner of the main processing unit including the first tuner and the first decoder, the broadcast decoded by the first decoder. When a broadcasting station is output, or when another broadcasting station is selected by the second tuner of the sub-processing unit including the second tuner and the second decoder, it is decoded by the second decoder. Another broadcast station different from the currently output broadcast station is selected through a program output step for outputting a program of another broadcast station and a selection unit for allowing the user to select a broadcast station or another broadcast station. When recognizing that, when the channel selection process control step for starting the channel selection process by the sub-processing unit that is not currently being output, and when the other broadcast station is finally determined via the selection unit , Main processing From to have a switching step of switching to the sub-processing unit.

  As a result, the channel selection process for the other broadcast station can be started by the sub-processing unit at the stage where the other broadcast station is selected but not finally determined. If the output source is switched from the current broadcasting station by the main processing unit to another broadcasting station where the channel selection processing has already been completed by the sub processing unit, the other broadcasting station The time from selecting a channel to displaying a program can be greatly reduced.

  According to the present invention, the channel selection process for the other broadcast station can be started by the sub-processing unit at the stage where the other broadcast station is selected but not finally determined. When the station is finally determined, if the output source is switched from the current broadcasting station by the main processing unit to another broadcasting station where the channel selection processing has already been completed by the sub processing unit, Information processing apparatus and program switching that can greatly shorten the time from selecting a broadcast station to displaying a program and thus further reducing the time from selecting to displaying the program. A method can be realized.

Hereinafter, the best mode for carrying out the invention (hereinafter referred to as an embodiment) will be described. The description will be given in the following order.
1. First embodiment (when program list screen is used)
2. Second embodiment (when a cross media bar is used)
3. Other embodiments

<1. First Embodiment>
(1) [Configuration of terrestrial digital television receiver]
In FIG. 1, reference numeral 1 denotes a terrestrial digital television receiver according to an embodiment of the present invention as a whole, and a control unit 10 having a CPU (Central Processing Unit) configuration performs overall control.

  The control unit 10 of the terrestrial digital television receiver 1 executes television display processing corresponding to various commands received from the remote controller (hereinafter referred to as a remote controller) RC via the light receiving unit 13. It is made like that.

  In practice, the terrestrial digital television receiver 1 receives the broadcast wave S1 of the terrestrial digital television broadcast via the antenna 2 and transmits it to the first digital tuner unit 21 of the main video processing unit 3.

  The first digital tuner unit 21 selects a modulated signal having a predetermined frequency from the broadcast wave S1 supplied via the antenna 2, and performs predetermined signal processing such as demodulation processing and error correction processing on the modulated signal. As a result, the transport stream TS1 is restored and sent to the first descrambler 22.

  The first descrambler 22 performs descrambling processing for releasing the scrambled state on the transport stream TS1, and as a result, sends the transport stream TS1D after the scrambled state is released to the first demultiplexer 23. To do.

  The first demultiplexer 23 separates and extracts the video stream VS1 and the audio stream AS1 by performing filtering on the transport stream TS1D based on the value of PID (Packet IDentification) stored in the header portion. Is sent to the first decoder 24.

  The first demultiplexer 23 also extracts additional data ES1 for configuring a program list screen (described later) from the transport stream TS1D, and sends it to the first decoder 24.

  The first decoder 24 obtains a video signal VD1, an audio signal AD1, and additional information ED1 by performing decoding processing on the video stream VS1, the audio stream AS1, and the additional data ES1, respectively.

  The first decoder 24 sends the video signal VD1 to the video processing unit 7 via the changeover switch 5, sends the audio signal AD1 to the audio processing unit 6 via the changeover switch 5, and adds the additional information ED1. It can be sent to the EPG generation unit 8 via the changeover switch 5.

  The audio processing unit 6 performs predetermined audio processing or the like on the audio signal AD1 supplied from the first decoder 24 via the changeover switch 5, and supplies the audio signal ADS1 obtained as a result to the speaker 11, thereby Sound corresponding to the audio signal ADS1 is output from a speaker.

  The video processing unit 7 performs predetermined image processing such as noise removal processing, resolution conversion processing, frame interpolation processing, and the like on the video signal VD1 supplied from the first decoder 24 via the changeover switch 5 and obtains the result. The video signal VDS1 is sent to the composition processing unit 9.

  The EPG generation unit 8 generates program list screen data LG1 having an OSD configuration based on the additional information ED1 supplied from the first decoder 24 via the changeover switch 5, and sends this to the synthesis processing unit 9.

  The synthesis processing unit 9 synthesizes the video signal VDS1 supplied from the video processing unit 7 and the program list screen data LG1 supplied from the EPG generation unit 8 by, for example, OSD (On Screen Display) processing, and obtains the result. The synthesized signal VZ1 is output to the LCD 12.

  Thereby, the composition processing unit 9 displays the program video on the LCD 12 in a state where a program list screen (described later) is superimposed on the program video of the broadcast station selected by the main video processing unit 3. .

  The terrestrial digital television receiver 1 includes a sub video processing unit 4 having the same function as the main video processing unit 3, and the sub video processing unit 4 includes a second digital tuner unit 31 and a second descrambler 32. The second demultiplexer 33 and the second decoder 34 are included.

  The second digital tuner unit 31, the second descrambler 32, the second demultiplexer 33 and the second decoder 34 of the sub video processing unit 4 are also the first digital tuner unit 21 and the first descrambler of the main video processing unit 3. 22 has the same function as the first demultiplexer 23 and the first decoder 24.

  The second digital tuner unit 31 of the sub video processing unit 4 selects a modulated signal having a frequency different from that of the main video processing unit 3 from the broadcast wave S1 supplied via the antenna 2, and outputs the modulated signal to the modulated signal. The transport stream TS2 is restored by performing predetermined signal processing such as demodulation processing and error correction processing, and is sent to the second descrambler 32.

  The second descrambler 32 performs descrambling processing for releasing the scrambled state on the transport stream TS2, and as a result, sends the transport stream TS2D after the scrambled state is released to the second demultiplexer 33. To do.

  The second demultiplexer 33 separates and extracts the video stream VS2 and the audio stream AS2 by filtering the transport stream TS2D based on the value of the PID stored in the header portion, and extracts them from the second decoder. 34.

  The second demultiplexer 33 also extracts additional data ES2 for configuring a program list screen (described later) from the transport stream TS2D, and sends this to the second decoder 34.

  The second decoder 34 obtains a video signal VD2, an audio signal AD2, and additional information ED2 by performing decoding processing on the video stream VS2, the audio stream AS2, and the additional data ES2, respectively.

  The second decoder 34 sends the video signal VD2 to the video processing unit 7 via the change-over switch 5, sends the audio signal AD2 to the audio processing unit 6 via the change-over switch 5, and the additional information ED2 It can be sent to the EPG generation unit 8 via the changeover switch 5.

  When receiving a command for switching from the main video processing unit 3 to the sub video processing unit 4 from the remote controller RC via the light receiving unit 13, the control unit 10 receives the video signal VD1, the audio signal AD1, and the additional information ED1 from the main video processing unit 3. Instead, the video signal VD2, the audio signal AD2, and the additional information ED2 from the sub video processing unit 4 are switched to be output.

  As a result, the audio processing unit 6 performs predetermined audio processing or the like on the audio signal AD2 supplied from the second decoder 34 via the changeover switch 5, and supplies the audio signal ADS2 obtained as a result to the speaker 11. Thus, the sound corresponding to the audio signal ADS2 is output to the speaker.

  The video processing unit 7 performs predetermined image processing such as noise removal processing, resolution conversion processing, frame interpolation processing, and the like on the video signal VD2 supplied from the second decoder 34 via the changeover switch 5 and obtains the result. The video signal VDS2 is sent to the composition processing unit 9.

  The EPG generation unit 8 generates program list screen data LG 2 having an OSD configuration based on the additional information ED 2 supplied from the second decoder 34 via the changeover switch 5, and sends this to the synthesis processing unit 9.

  The synthesis processing unit 9 synthesizes the video signal VDS2 supplied from the video processing unit 7 and the program list screen data LG2 supplied from the EPG generation unit 8 by, for example, OSD (On Screen Display) processing, and obtains the result. The synthesized signal VZ2 is output to the LCD 12.

  As a result, the composition processing unit 9 displays the program video of the other broadcasting station on the LCD 12 in a state where the program list screen (described later) is superimposed on the program video of the other broadcasting station selected by the sub video processing unit 4. It is designed to display.

  As described above, the terrestrial digital television receiver 1 has the main video processing unit 3 and the sub video processing unit 4, and either one can be selected by the control unit 10 via the changeover switch 5. ing.

(2) [Program switching display processing procedure]
Next, the program switching display processing procedure by the terrestrial digital television receiver 1 will be described using the flowchart of FIG.

  In this case, in the terrestrial digital television receiver 1, when the program video of the channel number “061” obtained by the main video processing unit 3 is displayed on the LCD 12, it is selected by the user via the program list screen. A program switching display process until the program video of channel number “081” is switched and displayed will be described.

  The control unit 10 of the terrestrial digital television receiver 1 enters from the start step of the routine RT1 according to the application program and proceeds to the next step SP1.

  In step SP1, the control unit 10 displays the program video X1 having the channel number “061” based on the composite signal VZ1 generated through the main video processing unit 3 as shown in FIG. The superimposed program list screen PLG1 is also presented, and the process proceeds to the next step SP2.

  The program list screen PLG1 has a configuration in which a time axis is provided on the vertical axis and a broadcasting station axis is provided on the horizontal axis, and program display frames W1 to W8 are formed in units of TV programs. In this example, the terrestrial digital television receiver 1 is currently selected for a TV program “Marumaru Market” broadcast by a broadcast station “ABS1” with a channel number “061” displayed in red, which is different from the others. It has been shown that

  Since the program display frame W1 is displayed in a red color different from the others on the program list screen PLG1, the user is visually informed that the program display frame W1 is focused and currently being selected. It is made to be able to let you.

  In step SP2, the control unit 10 changes the channel selection destination from the currently focused program display frame W1 to other program display frames W2 to W8 based on a command given from the remote controller RC via the light receiving unit 13. It is determined whether or not.

  If a negative result is obtained here, this means that the focus remains on the program display frame W1 and the channel selection destination is not changed. At this time, the control unit 10 performs step SP1 and subsequent steps. Repeat the process.

  On the other hand, if an affirmative result is obtained in step SP2, this means that the focus is moved from the currently focused program display frame W1 to the other program display frames W2 to W8. This indicates that the station has been changed. At this time, the control unit 10 proceeds to the next step SP3.

  In step SP3, for example, as shown in FIG. 4, the control unit 10 focuses the TV program “Shirodane!” With the channel number “081” corresponding to the program display frame W2 via the remote controller RC. Recognizing that the broadcasting station “ABS1” with the number “061” has been changed to the broadcasting station “Kuji TV” with the channel number “081”, the process proceeds to the next step SP4.

  In step SP4, the control unit 10 starts the channel selection process for the broadcasting station “Kuji TV” of the channel number “081” using the sub video processing unit 4 at this time, and proceeds to the next step SP5.

  In this case, the control unit 10 merely changes the target focused through the remote controller RC from the broadcast station “ABS1” to the broadcast station “Kuji TV”, and the TV program “ “Shirodane!” Was not finally determined, but at this stage, the sub-picture processing unit 4 starts the channel selection process for the broadcast station “Kuji Television” with the channel number “081”.

  In step SP5, the control unit 10 finally determines the TV program “Shirodane!” Of the broadcast station “Kuji TV” corresponding to the currently focused program display frame W2 through the remote controller RC as a viewing target. It is determined whether or not.

  If a negative result is obtained here, although this is focused on the TV program “Shirodane!” In the program display frame W2, it has not yet been finally determined as a viewing target. This indicates that the focus may be moved to other program display frames W3 to W8. At this time, the control unit 10 repeats the processing after step SP2.

  On the other hand, if an affirmative result is obtained in step SP5, this means that when the TV program “Shirodane!” In the program display frame W2 is focused, the user decides on the remote controller RC (not shown). 2), the TV program “Shirodane!” Of the broadcasting station “Kuji TV” in the program display frame W2 is determined as the final viewing target, and control is performed at this time. The unit 10 moves to the next step SP6.

  In step SP6, the control unit 10 switches from the main video processing unit 3 that is currently outputting to the sub video processing unit 4 that has already started the channel selection processing in step SP4, moves to the next step SP7, and ends the processing. .

  As described above, the control unit 10 is not finally determined as a viewing target, but starts the channel selection process for the broadcast station “Kuji TV” when the program display frame W2 is focused. As a result, the waiting time from when the TV program “Shirodane!” Of the broadcasting station “Kuji TV” is determined as the final viewing target until the program video is displayed can be greatly shortened. Has been made.

(3) [Operation and effect]
In the above configuration, in the terrestrial digital television receiver 1, when the program display frame W1 of the program list screen PLG1 is determined as a viewing target, that is, the broadcast station “ABS1” of the channel number “061” is selected as the main video processing unit. When the control unit 10 recognizes that the focus has been moved from the program display frame W1 to the program display frame W2 during channel selection, the control unit 10 starts the following processing.

  That is, when the program display frame W2 is focused, the control unit 10 of the terrestrial digital television receiver 1 does not make a final decision for the TV program “Shirodane!” In the program display frame W2. Then, the sub video processing unit 4 starts the channel selection process for the broadcast station “Kuji TV” having the channel number “081” corresponding to the program display frame W2.

  Accordingly, when the control unit 10 of the terrestrial digital television receiver 1 recognizes that the program is finally determined as a viewing target while being focused on the program display frame W2, the TV program "ABS1" It is possible to switch from the main video processing unit 3 that is currently outputting the “Marumaru Market” program video to the sub video processing unit 4 that has already started the channel selection process.

  At this time, when the control unit 10 of the terrestrial digital television receiver 1 is switched to the sub video processing unit 4, the channel selection process has already been completed or the channel selection process has been completed. The program image of the program “Marumaru Market” can be instantaneously switched from the program image of the TV program “Shirodane!” To be displayed on the LCD 12.

  This is a terrestrial digital television receiver having only the main video processing unit 3 as in the prior art, and is selected after the program display frame W2 is focused and finally determined as a viewing target. Compared with the case where processing is started, the display wait time for the program video after switching can be greatly shortened.

  According to the above configuration, in the terrestrial digital television receiver 1, while displaying the program video of the program display frame W1 selected on the program list screen PLG1, the other program display frame W2 is finally selected as a viewing target. Even in such a case, it is possible to reduce stress on the user by eliminating or minimizing the waiting time until the program video in the program display frame W2 is displayed.

<2. Second Embodiment>
Also in the second embodiment, the hardware configuration is the same as that of the terrestrial digital television receiver 1 in the first embodiment, and the program switching display processing procedure of the routine RT1 in the first embodiment is the same. Therefore, the description thereof is omitted here for the sake of convenience, and only the differences will be described.

  In the terrestrial digital television receiver 1 according to the second embodiment, instead of using the program list screen PLG1 as shown in FIGS. 3 and 4, the “cross media bar” as shown in FIGS. A program list screen PLG2 of a format called “(registered trademark of Sony Corporation)” is used.

  In this program list screen PLG2, on the horizontal axis, music icon AC1, movie icon AC2, terrestrial digital broadcast icon AC3, BS (Broadcasting Satellite) broadcast icon AC4, CS (Communication Satellite) broadcast icon AC5, external input icon AC6 and Internet icon AC7 is arranged, and a broadcasting station is arranged on the vertical axis.

  The control unit 10 of the terrestrial digital television receiver 1 selects the terrestrial digital broadcast icon AC3 on the program list screen PLG2 according to the user's operation on the remote controller RC, and then the TV program “Marumaru Market” by the broadcast station “ABS1”. In the state in which the channel number “061” on which is broadcast is finally determined by the focus frame FC (FIG. 5), the program video of the TV program “Marumaru Market” is displayed on the LCD 12 via the main video processing unit 3.

  Thereafter, the control unit 10 of the terrestrial digital television receiver 1 starts the TV program by the broadcast station “Kuji TV” in accordance with the user's operation on the remote controller RC from the state where the channel number “061” is finally determined by the focus frame FC. When it is recognized that the channel number “081” on which “Shirodane!” Is broadcast is selected by the focus frame FC, the following processing is performed.

  That is, when the channel number “081” is selected by the focus frame FC, the control unit 10 of the terrestrial digital television receiver 1 assumes that it is not the final determination for the TV program “Shirodane!” Of the broadcasting station “Kuji Television”. At this stage, the sub video processing unit 4 starts the channel selection process for the broadcast station “Kuji TV” having the channel number “081” corresponding to the focus frame FC.

  Accordingly, when the control unit 10 of the terrestrial digital television receiver 1 recognizes that the broadcast station “Kuji TV” is finally determined as a viewing target while the channel number “081” is selected by the focus frame FC. Thus, it is possible to switch from the main video processing unit 3 that is currently outputting the program video of the TV program “Marumaru Market” by the broadcast station “ABS1” to the sub video processing unit 4 that has already started the channel selection process.

  At this time, when the control unit 10 of the terrestrial digital television receiver 1 is switched to the sub video processing unit 4, the channel selection process has already been completed, or the channel selection process has been completed. The program image of the TV program “Marumaru Market” can be instantaneously switched from the program image of the TV program “Shirodane!” To be displayed on the LCD 12.

  As described above, the control unit 10 of the terrestrial digital television receiver 1 is not finally determined as a viewing target, but when the channel number “081” is selected by the focus frame FC, the broadcasting station “Kuji TV” is selected. ”Is started, the TV program“ Shirodane! ”Of the broadcasting station“ Kuji TV ”is determined as the final viewing target, and the waiting time until the program video is displayed is displayed. Time can be significantly reduced.

<3. Other embodiments>
In the above-described embodiment, the case where the control unit 10 of the digital terrestrial television receiver 1 switches the program video of the TV program as an output target has been described. However, the present invention is not limited to this, and the radio You may make it switch the program audio | voice of a program as an output object.

  In the above-described embodiment, the control unit 10 of the terrestrial digital television receiver 1 performs the program list screen PLG1 as shown in FIGS. 3 and 4 and the program list screen as shown in FIGS. The case where PLG2 is used as a target has been described.

  However, the present invention is not limited to this, and the control unit 10 of the terrestrial digital television receiver 1 can display the program list screen having various configurations such as a three-dimensionally displayed program list screen and a text-displayed program list screen. May be used as a target.

  Further, in the above-described embodiment, the control unit 10 of the terrestrial digital television receiver 1 selects the program display frame W1 to W8 based on the focus, or selects the channel by the focus frame FC. The case where the number was selected was described.

  However, the present invention is not limited to this, and the control unit 10 of the terrestrial digital television receiver 1 broadcasts by selecting one of the program display frames W1 to W8 or a channel number via an operator such as a cursor. You may make it select a station.

  Further, in the above-described embodiment, the case where any one of the program display frames W1 to W8 or the channel number is selected via the remote controller RC as the selection unit has been described.

  However, the present invention is not limited to this, and any one of the program display frames W1 to W8 or a channel number is selected via an operation button or the like (not shown) provided on the main body of the terrestrial digital television receiver 1. You may do it.

  Furthermore, in the above-described embodiment, the channel selection process is started when any one of the program display frames W1 to W8 or the channel number is selected via the remote controller RC as the selection unit, and the channel selection destination is the viewing target. When it is recognized that the final decision has been made, the case where the main video processing unit 3 that is currently outputting is switched to the sub video processing unit 4 that has already started the channel selection processing has been described.

  However, the present invention is not limited to this. When the channel selection process is terminated after the channel selection process is started at the stage of selecting any one of the program display frames W1 to W8 or the channel number via the remote controller RC, Even when the channel selection destination is not finally determined as the viewing target, the main video processing unit 3 may be switched to the sub video processing unit 4 that has already completed the channel selection processing.

  Further, in the above-described embodiment, the case where the control unit 10 of the terrestrial digital television receiver 1 executes the program switching display processing procedure of the routine RT1 according to the application program installed in advance has been described.

  However, the present invention is not limited to this, and the program switching display processing procedure of the routine RT1 described above is executed in accordance with an application program installed from a predetermined recording medium, an application program downloaded from the Internet, and other application programs installed by various routes. You may make it do.

  Furthermore, in the above-described embodiment, the terrestrial digital television as the information processing apparatus according to the present invention includes the main video processing unit 3 as the main processing unit, the sub video processing unit 4 as the sub processing unit, and the control unit 10 as the control unit. The case where the John broadcast receiver 1 is configured has been described.

  However, the present invention is not limited to this, and the information processing apparatus of the present invention may be configured by a main processing unit, a sub processing unit, and a control unit having various other configurations.

  The information processing apparatus and the program switching method according to the present invention include, for example, a personal computer equipped with a tuner function capable of receiving a terrestrial digital television broadcast, a car navigation system, in addition to a television receiver capable of receiving a terrestrial digital television broadcast. The present invention can be applied to a system, a mobile phone, a PDA (Personal Digital Assistant), and the like.

It is a basic block diagram which shows the structure of a terrestrial digital television broadcast receiver. It is a flowchart which shows a program switching display process procedure. It is a basic diagram which shows the program image | video (1) with which the program list screen was piled up. It is a basic diagram which shows the program image | video (2) with which the program list screen was piled up. It is a basic diagram which shows the program image | video (1) with which the program list screen in other embodiment was piled up. It is a basic diagram which shows the program image | video (2) on which the program list screen in other embodiment was piled up.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Terrestrial digital television receiver, 2 ... Antenna, 3 ... Main video processing part, 4 ... Sub video processing part, 5 ... Changeover switch, 6 ... Audio processing part, 7 ... Video processing part , 8... EPG generation unit, 9... Synthesis processing unit, 10... Control unit, 11... Speaker, 12... LCD, 13. 1 descrambler, 23... First demultiplexer, 24... First decoder, 31... Second digital tuner section, 32... Second descrambler, 33. .

Claims (3)

A main processing unit that includes a first tuner and a first decoder, and outputs a program of the broadcasting station decoded by the first decoder when a broadcasting station is selected by the first tuner;
Sub-process comprising a second tuner and a second decoder, and outputting a program of the other broadcast station decoded by the second decoder when another broadcast station is selected by the second tuner. And
When recognizing that the other broadcasting station different from the broadcasting station currently being output is selected by the main processing unit via the selection unit for allowing the user to select the broadcasting station or the other broadcasting station. When the sub-processing unit by the sub-processing unit that is not currently outputting is started and when it is recognized through the selection unit that the other broadcasting station is finally determined, the sub-processing is performed from the main processing unit. An information processing apparatus comprising: a control unit that switches to a unit. A program guide screen processing unit for displaying the program guide screen output by the main processing unit on a display means,
When the control unit recognizes that the program of the other broadcast station different from the program of the broadcast station currently being output is selected and focused on the program guide screen by the selection unit, The information processing apparatus according to claim 1, wherein channel selection processing by the sub-processing unit that is not currently outputting is started. When a broadcasting station is selected by the first tuner of the main processing unit including the first tuner and the first decoder, the program of the broadcasting station decoded by the first decoder is output, or When another broadcast station is selected by the second tuner of the sub-processing unit including the second tuner and the second decoder, the program of the other broadcast station decoded by the second decoder is output. A program output step,
Currently outputting when recognizing that the other broadcast station different from the currently output broadcast station is selected via the selection section for allowing the user to select the broadcast station or the other broadcast station. A tuning process control step for starting a tuning process by the sub-processing unit that is not,
A program switching method comprising: a switching step of switching from the main processing unit to the sub-processing unit when recognizing that the other broadcasting station is finally determined via the selection unit.

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