JP4522221B2 - Digital television broadcast receiver - Google Patents

Description

  The present invention relates to an in-vehicle digital television broadcast receiving apparatus (TV apparatus), and in particular, in the case of a TV apparatus whose display during travel is not regulated, control is performed so as to receive viewer participation programs with priority. The present invention relates to a digital television broadcast receiving apparatus that controls to preferentially receive programs other than the viewer participation type in the case of a TV apparatus in which display during travel is restricted.

Recently, terrestrial digital broadcasting has been started, and it can be used not only in homes but also in in-vehicle devices. In terrestrial digital TV broadcasting, unlike analog TV broadcasting, user-participation-type broadcasting is possible through two-way communication (see, for example, Patent Document 1). As an example of this user-participation-type broadcasting service, there is a viewer-participation-type quiz program, which receives an answer to the problem presented to the viewer from the viewer and introduces the correct answer rate on TV broadcasting. Another example is a sports program, in which a viewer requests profile information of participating players, and the program provider provides the information individually to the user.
By the way, in a vehicle-mounted TV device, a driver cannot see a TV image while traveling (see Patent Document 2). For example, when the driver can view the TV screen, the display amount is limited when the driver tries to view the TV image, or the screen is rotated so that the driver cannot see the TV image. Or, the screen of the TV device provided on the front side of the vehicle is not displayed (blacked out) during traveling, and only audio is allowed to be auditioned. However, regardless of whether or not the TV device provided on the rear seat side of the vehicle is running, the occupant can always watch TV images.
: JP 2004-193681 A : JP 2003-214878 A

Even if a viewer participatory TV broadcast is received while driving, the driver cannot perform the operation, and only the voice is heard. The viewer participatory program is not interesting for the driver, and a program other than the viewer participatory program is selected. Often to do. On the other hand, in the TV device provided on the rear seat side of the vehicle, the occupant can always watch TV images even while traveling. The entertainment property is improved for users.
Conventionally, it is possible to select a program (channel) in consideration of (1) whether or not the TV device is restricted from being displayed during travel and whether or not (2) it is a viewer participation program. There was a problem that channel selection was troublesome.
From the above, an object of the present invention is to provide a digital program in which a predetermined program can be preferentially selected in consideration of whether display during travel is restricted or whether the program is a viewer participation program. A television broadcast receiver is provided.

According to the present invention, there is provided a receiving unit for receiving a digital broadcast signal, and a television program being broadcast on each channel based on program arrangement information included in the received digital television broadcast signal. In the case of an in-vehicle television device whose display during travel is not restricted, control is performed so that viewer participation type programs are received preferentially, and display during travel In the case of a vehicle-mounted television device that is restricted, this is achieved by a vehicle-mounted digital television broadcast receiving device that includes a control unit that performs control so that a program other than the viewer participation type is received preferentially.
In addition to the above means, the digital television broadcast receiving apparatus of the present invention comprises means for detecting the received electric field strength of each channel, and the control means is a vehicle-mounted television apparatus whose display during travel is not restricted. Is a program of a channel whose received electric field strength is a set level or higher, and viewer-participation-type programs are preferentially arranged over other programs so that presets can be selected, and the display during driving is regulated. In the case of a television apparatus, a program other than the viewer participation type program that has a channel whose reception electric field strength is equal to or higher than a set level can be preferentially arranged over the viewer participation type program so that preset selection can be performed.
In addition to the above-described means, the digital television broadcast receiving apparatus of the present invention includes means for creating and displaying an electronic program guide screen, and the control means is a vehicle-mounted television apparatus whose display during travel is not restricted. In the case of an in-vehicle television device in which the viewer participation type program is highlighted so as to be distinguishable from other programs on the electronic program guide screen, and the display during running is regulated, The type program is not displayed on the electronic program guide screen.

  According to the present invention, it is possible to preferentially select a predetermined program in consideration of whether the display during travel is restricted or whether the program is a viewer participation type program. For example, in the case of an in-vehicle TV device in which display during travel is not regulated, a viewer participation type program can be preferentially received, and in the case of an in-vehicle TV device in which display during travel is regulated. Can preferentially receive programs other than the viewer participation type.

  In the in-vehicle digital TV apparatus, the received electric field strength of each channel is detected, and whether the TV program being broadcast on each channel is a viewer participation program based on the program arrangement information included in the received TV broadcast signal Identify whether or not. In the case of an in-vehicle TV device in which display during travel is not restricted at the time of program selection, control is performed so that viewer participation type programs are received preferentially, and in-vehicle display in which display during travel is restricted. In the case of a TV apparatus, control is performed so as to preferentially receive programs other than the viewer participation type.

Digital Television Broadcast Receiving Device FIG. 1 is a block diagram of a digital television broadcast receiving device (TV device) of the first embodiment.
The antenna 11 receives a digital TV broadcast signal radio wave, and the front end unit 12 extracts a desired reception frequency component selected by the user from the TV broadcast signal received via the antenna 11 and the extracted TV broadcast. Frequency conversion is performed on the signal to output an intermediate frequency signal. The baseband unit 13 performs quadrature demodulation processing and FEC (Forward Error Correction) processing on the intermediate frequency signal output from the front end unit 12, then deinterleaves and descrambles the original data string. Finally, error detection / correction processing is performed and high-efficiency code data (MPEG data) is output. The data separation unit 14 separates the MPEG video data, the MPEG audio data, and the information data (program sequence information SI) of the channel selected by the user from the high efficiency code data (MPEG data) of all the channels input from the baseband processing unit 13. Then, the MPEG video data and the MPEG audio data are input to the audio decoding unit 15 and the image decoding unit 16, respectively, and the program sequence information SI is input to the information data decoding unit 17. The audio decoding unit 15 decodes the input MPEG audio data into PCM audio data, converts it into an analog audio signal and inputs it to the audio output unit 19, and the image decoding unit 16 decodes the MPEG video data to convert the video signal. The information data decoding unit 17 decodes the program arrangement information SI and inputs it to the control unit 18.

  Figure 2 shows the correspondence between the names of the various tables that make up the program sequence information SI and their packet identifiers PID and table IDs: (1) PAT (Program Association Table), (2) CAT (Conditional Access Table) , (3) PMT (Program Map Table), (4) NIT (Network Information Table), (5) SDT (Service Description Table), (6) BAT (Bouquet Association Table), (7) EIT (Event Information Table) (8) TDT (Time Date Table), (9) RST (Running Status Table), and (10) ST (Stuffing Table). The first four tables PAT, CAT, PMT, and NIT are called program specification information PSI (Program Specific Information). According to the program arrangement information SI, (1) program name, broadcast date and time, description of the program, information about the program such as whether the program is a viewer participation program, (2) current date, time, (3) program Present progress status is presented.

Returning to FIG. 1, the control unit 18 is connected to the front end unit 12, the data separation unit 14, the received electric field strength detection unit 21, the operation / display unit 22, the EPG image creation unit 23, the traveling display regulation television identification unit 24, and the like. Then, various controls described later are executed. The reception electric field strength detection unit 21 detects the reception electric field strength of the reception channel during auto-preset control and inputs it to the control unit 18. The operation / display unit 22 includes a display unit 22a and an operation unit 22b. The operation unit 22b is provided with a program selection key K1, an EPG screen display request key K2, a preset key K3, and the like. To perform program guide display using EPG data, (1) EPG screen display is requested with key K2 during normal screen display, and (2) EPG screen is changed from the normal screen to the EPG dedicated screen as shown in FIG. (3) Scroll the EPG dedicated screen appropriately to select the desired program, and (4) Return to the normal screen by the return operation.
The on-running display restriction TV specifying unit 24 sets whether or not the on-running display is restricted. The TV device provided on the front side of the vehicle is set to “with in-running display restriction”. “No display restriction during travel” is set for the TV device provided on the rear side.

The control unit 18 accumulates the program sequence information SI input from the information data decoding unit 17, creates EPG screen information by an EPG screen display request from the operation / display unit 22, and inputs the EPG screen information to the EPG image creation unit 23. The EPG image creation unit 23 creates an EPG screen (see FIG. 3) including guidance information for all programs and all channels using the EPG screen information input from the control unit 18 and inputs the EPG screen to the image output unit 21. The control unit 18 sends a channel selection signal to the front end 12 and inputs the received program information PID to the data separation unit 14 based on the user's channel selection operation. Further, the control unit 18 periodically performs auto-preset control, identifies receivable channels, presets them in the preset memory 18a, and selects a channel preset in the preset memory 18a every time the preset key K3 is operated. As a signal, it is input to the front end and receives TV broadcast signals in preset order.
The communication device 25 is a transmission device that transmits viewer participation data input from the operation unit 22b to a television station.

Auto Preset Control FIG. 4 is a processing flowchart of auto preset control.
When reception of the digital TV broadcast is started (step 101), the control unit 18 extracts and stores the latest program arrangement information SI included in the TV broadcast signal (step 102). In such a state, the control unit 18 periodically receives each channel, detects the received electric field strength, and stores a channel having the received electric field strength equal to or higher than a set level as a receivable station (step 103). Next, the control unit 18 checks whether the TV device is restricted from being displayed during travel (step 104). If the TV device is a TV device provided on the rear side, “no display restriction during travel” is set, the control unit 18 determines the received electric field strength of the receivable channel and the program arrangement information SI of the channel. refer. Then, the control unit 18 arranges receivable viewer participation programs in the order of received electric field strength, and then arranges programs other than receivable viewer participation programs in the order of received electric field strength and stores them in the preset memory 18a (step 105). That is, when there is no display restriction during travel, the preset memory 18a is stored in the preset order so that the viewer participation program is preferentially selected.

On the other hand, if the TV device provided on the front side is set to “with display restriction during travel”, the control unit 18 obtains the received electric field strength of the receivable channel and the program arrangement information SI of the channel. refer. Then, the control unit 18 arranges programs other than the receivable viewer participation programs in the order of the received electric field strength, and then arranges the receivable viewer participation programs in the order of the received electric field strength and stores them in the preset memory 18a (step 106). That is, when there is a display restriction during traveling, the preset memory 18a stores the programs other than the viewer participation program in the preset order so that the programs are preferentially selected.
If the preset key K3 is operated after the above auto-preset, tuning is performed in the order preset in the preset memory 18a for each operation (step 107). As a result, when there is no display restriction during travel, the viewer participation program is preferentially selected, and when there is display restriction during travel, a program other than the viewer participation program is preferentially selected.
In the above, they are arranged in the order of received electric field, but they may be arranged in ascending order of channel numbers. In short, when there is no display restriction during running, the preset memory is stored in order so that viewer participation programs are preferentially selected. What is necessary is just to memorize | store in order in a preset memory so that a program may be selected preferentially.

FIG. 5 is a block diagram of a digital television broadcast receiving apparatus according to the second embodiment. Components identical with those of the first embodiment shown in FIG. A different point is that the reception electric field intensity detection unit 21 is removed.
FIG. 6 is an EPG screen processing flow of the second embodiment. When reception of the digital TV broadcast is started (step 201), the control unit 18 extracts and stores the latest program arrangement information SI included in the TV broadcast signal (step 202). Next, the control unit 18 checks whether or not the EPG display is requested by the operation of the key K2 (step 203), and if the EPG display is requested, the control unit 18 checks whether or not the TV device in which the running display is restricted (step 204). . If the TV device is a TV device provided on the rear side, “no display control during running” is set, the control unit 18 creates EPG screen information that highlights the viewer participation program to create an EPG. Input to the image creation unit 23. The EPG image creation unit 23 highlights the viewer participation programs 71 and 72 as shown in FIG. 7A using the EPG screen information input from the control unit 18 (step 205). As a result, the user can easily recognize the viewer participation program and select the program with priority.
On the other hand, if the TV apparatus is a TV apparatus provided on the front side, “with display restriction during running” is set, the control unit 18 creates EPG screen information from which the viewer participation program has been removed. Input to the EPG image creation unit 23. The EPG image creation unit 23 displays an EPG screen that does not include a viewer participation program as shown in FIG. 7B using the EPG screen information input from the control unit 18 (step 206). As a result, the user cannot select the viewer participation program and can preferentially select a program other than the viewer participation program.

It is a block diagram of the digital television broadcast receiving apparatus (TV apparatus) of 1st Example. It is a correspondence table of the names of various tables constituting the program arrangement information SI, their packet identifiers PID, and table IDs. It is an EPG dedicated screen example. It is a processing flow of auto preset control. It is a block diagram of the digital television broadcast receiver of 2nd Example. It is an EPG screen processing flow of 2nd Example. It is an EPG screen example of 2nd Example.

Explanation of symbols

12 Front end unit 13 Baseband processing unit 14 Data separation unit 15 Audio decoding unit 16 Image decoding unit 17 Information data decoding unit 18 Control unit 19 Audio output unit 20 Image output unit 21 Received electric field strength detection unit 22 Operation / display unit 23 EPG Image creation unit 24 Display regulation television identification unit 25 during travel Communication device

Claims (3)

In an in-vehicle digital television broadcast receiver,
A receiver for receiving a digital broadcast signal;
Means for identifying whether or not the television program being broadcast on each channel is a viewer participation program based on program arrangement information included in the received digital television broadcast signal;
In the case of a vehicle-mounted television device whose display during travel is not regulated, the vehicle-mounted television device that is controlled so as to receive a viewer-participation-type program preferentially and the display during travel is regulated In this case, control means for controlling to receive programs other than the viewer participation type with priority,
A digital television broadcast receiver characterized by comprising: Means for detecting the received field strength of each channel;
In the case of an in-vehicle television device whose display during travel is not regulated, the control means includes a program of a channel having a received electric field strength of a set level or higher and a viewer participation type program. In the case of an in-vehicle television device that allows the preset selection to be arranged in priority over the programs of the above, and the display during travel is restricted, it is a program of a channel whose received electric field strength is equal to or higher than the set level and is a viewer participation type 2. The digital television broadcast receiving apparatus according to claim 1, wherein programs other than the above can be pre-selected and preset selected from the viewer participation type programs. Means for creating and displaying an electronic program guide screen,
In the case of a vehicle-mounted television device whose display during travel is not regulated, the control means highlights a viewer-participation-type program so that it can be distinguished from other programs on the electronic program guide screen. 2. A digital television according to claim 1, wherein in the case of an in-vehicle television device whose display during travel is restricted, a viewer participation program is not displayed on said electronic program guide screen. Broadcast receiving device.

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