JP2001094897A - Onboard diigtal television broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve conventional problems such that information from broadcasting can not be sufficiently obtained because pictures are not displayed in order to prevent driver's attention from being interrupted and the selection of sub- sound or the like is very troublesome. SOLUTION: The onboard digital television broadcast receiver is constituted so as to extract a broadcast sort identification code from the program information of a broadcasting program provided through digital broadcast and automatically select the reproduced sound of the received program on the basis of the traveling state of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle digital television broadcast receiving apparatus, and more particularly to a method for reproducing video and audio of a program received by a receiving apparatus based on a driving condition of a vehicle. By making a selection, it is intended to provide the driver with effective information while ensuring safety during traveling.

[0002]

2. Description of the Related Art A conventional on-vehicle television broadcast receiving apparatus is connected to a sensor unit for detecting a running state (stop or running) of a vehicle, and receives a signal only when it is detected that the vehicle is stopped. The displayed video signal is displayed on the screen of the display device. In other cases, a setting is made to turn off the screen display or turn off the power supply of the display device, which may distract the driver's attention. The reproduced sound is directly reproduced from a speaker or the like.

[0003] Most of recent TV broadcasts are broadcast in multiplex audio, and stereo broadcast, bilingual broadcast, main / sub audio broadcast, and monaural broadcast audio are broadcasted according to the content of the program. .

[0004] In particular, most of the programs having the main / sub sound broadcast a commentary sound for people with low vision who cannot see the image.

In recent years, digital broadcasting has been developed, and, for example, satellite digital broadcasting using a communication satellite has been viewed in ordinary households. Development studies are underway.

[0006] In these digital broadcasts, the above-mentioned multiplex audio broadcasting is possible, and further, it is possible to transmit program information together with a radio wave for broadcasting. The program information includes various information related to the program being broadcast, and includes a discrimination code for specifying an audio broadcast of the program. Obtaining and creating program guides are also being done.

[0007]

However, in the case where the receiving device is mounted on a vehicle, as described above, the receiving device is designed so as not to take the driver's attention in order to ensure safety during traveling. It is necessary to adopt a configuration that does not perform screen display, and there is a problem that sufficient information cannot be obtained by broadcasting only audio since general television broadcasting provides information using images and sounds.

[0008] The above problem is that, when a received program is a multiplex broadcast having sub-audio, sufficient information about the program being broadcast cannot be obtained by selecting the sub-audio as reproduction audio. Although it is possible, it is necessary to confirm whether or not the program has sub-audio by displaying it on a receiving device or the like. It is necessary for the operator to determine whether the broadcast is broadcast in two languages or has sub-audio for commentary for people with low vision. In addition, the selection as the reproduction sound is very troublesome, and performing an operation during traveling has a problem from the viewpoint of safety.

In view of the above problems, it is an object of the present invention to determine information woven into program information transmitted together with a program being broadcast in digital television broadcasting,
In the case where the program being received is broadcast with multiplexed audio and has a main / sub audio, while the vehicle is running or the screen is not displayed, only the sub audio is selected and reproduced as the reproduced audio. It is an object of the present invention to provide a receiver capable of sufficiently providing program information to a driver and ensuring safety during traveling.

A further object of the present invention is to provide a digital broadcast, in which image information of a currently received program is superimposed on a video signal and transmitted, whereby a still image other than a general moving image display is broadcast. In such a case, the still image is displayed on the screen to provide sufficient information without damaging the driver's attention.

[0011]

In order to solve the above-mentioned problems, the present invention provides at least a reception selecting section for receiving and selecting a broadcast radio wave, a demodulation section for demodulating the received and selected broadcast radio wave, A demultiplexer unit that distributes the demodulated radio signal to other information signals such as video signals, audio signals, and program information, a data decoder unit that decodes the information signal, and a video signal decoding unit that decodes the video signal. An audio signal decoding unit that decodes an audio signal, and an in-vehicle digital television broadcast receiving device that includes a sensor unit that detects a vehicle driving condition in a vehicle, and inputs an output from the sensor unit to the receiving device, The output of the sensor unit indicates that the vehicle is running, and based on the program information received by the on-vehicle television broadcast receiving apparatus, a video for reproducing the received program. It is achieved by providing information and a selection means for selecting voice information to the in-vehicle digital television broadcast receiving apparatus.

Further, the present invention provides at least a reception selecting section for receiving and selecting a broadcast radio wave, a demodulation section for demodulating the received and selected broadcast radio wave, and a video signal and an audio signal based on the demodulated radio signal. And a demultiplexer unit for distributing to other information signals such as program information, a data decoder unit for decoding the information signal, a video signal decoding unit for decoding a video signal, an audio signal decoding unit for decoding an audio signal, In the in-vehicle digital television broadcast receiving device having an image, the video signal decoding unit detects the type information of the video included in the received video signal of the broadcast wave, and displays the image based on the detected type information. This is achieved by providing a selection means for selecting information in the on-board digital television broadcast receiver.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an on-vehicle digital television broadcast receiving apparatus according to the present invention.

Reference numeral 1 denotes an in-vehicle digital television broadcast receiver, in which a radio wave received by the antenna 5
Reception channel selection unit 1 for selecting the radio wave of the broadcasting station selected by the operator
0, and a demodulation unit 12 for demodulating the received radio wave.
To the operation control unit 30 that controls the operation of each function in the operation. The signal wave demodulated by the demodulation unit 12 may be transmitted to the descrambler unit 1 according to an instruction from the operation control unit 30 if necessary.
In step 4, the decoded signal is sent to the MPEG demultiplexer 16, and the multiplexed data stream is separated into individual data streams. These individual data streams are based on an instruction from the control operation unit 30,
EPG (Electronic Prog) from demodulated data stream
ram Guide: electronic program guide) EPG / data decoder 18 for detecting information and data information, video signal decoder 20 for decoding the video signal of the program being received, audio for decoding the audio signal of the program being received Signal decoding unit 22
Is sent to each section. The decoding information of the EPG / data decoder unit 18 and the video signal decoding unit 20 is sent to the operation control unit 30, and the operation control unit 30 receives the information and the information input from the driving situation detection unit 40 to the operation control unit 30. , A control signal is sent to the display video control unit 24 and the reproduction audio control unit 26 to select the video reproduced by the display unit 34 and the audio reproduced by the speaker 36.

The driving condition detecting unit 40 outputs a signal from a sensor 41 provided on a rotary drive unit such as a rotating shaft of a front wheel for detecting the speed of the vehicle and a parking brake sensor 42 for detecting the operating condition of the parking brake. , An output signal indicating the driving condition of the vehicle is transmitted to the operation control unit 30 in the in-vehicle digital television receiver 1.

The operation input section 32 is an input section for giving various instructions to the digital television broadcast receiver 1 from a driver or a passenger of the vehicle, and is operated by a remote controller (not shown).

The operation of the present invention will be described below with reference to the flowchart shown in FIG.

When the automatic mode for selecting and receiving a television broadcast is selected by an operation of the driver or the like on the operation input unit 32 (step 100), the operation control unit 30 performs a driving operation to obtain information on the running condition of the vehicle. The output from the status detection unit 40 is obtained, and the information is stored as C0 (step 101).

Next, the operation control section 30 determines whether or not the vehicle is traveling at C0 (step 102), and if not, proceeds to step 104 to turn on the screen display,
If the vehicle is running, the process proceeds to step 103 and the screen display is turned off.

When the screen display status is set in the steps up to the above, the process proceeds to a step for selecting a reproduced sound. First, the broadcast content of the program received from the program information decoded by the EPG / data decoder unit 18 is transmitted to the operation control unit 3.
0, and the content is stored as S0 (step 110).

The program information includes information on a program being broadcast and a program scheduled to be broadcast as shown in FIG. 3, and the program information shown in FIG. 3 is displayed on the screen by an input from an operator. Can also be displayed.

In FIG. 3, "two", "sub", "su",
Each phrase of "mo" is described in the lower right corner of the column displaying each program name, and this phrase indicates the type of broadcast in each program, and is "bilingual broadcast", "main / secondary audio", respectively. Broadcast "," stereo broadcast ", and" monaural broadcast ". This information is included as a part of the data (broadcast type identification code) decoded by the EPG / data decoder unit 18 from the radio wave received by the in-vehicle digital television receiver 1. S0 is obtained by extracting the broadcast type identification code of the received program.

Steps 111 to 113 following the stored value of S0 with respect to the broadcast contents of the program acquired in step 110 represent program information judgment means provided inside operation control unit 30. In these steps, the broadcast type identification code is determined, and based on the determination result, the audio to be reproduced by the operation control unit 30 is selected, and an instruction to the reproduced audio control unit 26 is given.

First, a comparison is made between the value of S0 sent from the EPG / data decoder unit 18 to the operation control unit 30 and the broadcast type identification code representing monaural broadcasting (step 111). If the comparison results match, it is determined that the received program is a monaural broadcast, and the operation control unit 30 gives an instruction to the reproduction audio control unit 26 to select monaural audio as the reproduction audio (step 115). .

If the value of S0 does not match the broadcast type identification code of the monaural broadcast at step 111, it is determined that the program being received is being broadcast by multiplex audio, and S0 is a broadcast representing stereo broadcast. This is compared with the type identification code (step 112). Here, when the values match, the control operation unit 30 gives an instruction to the reproduced sound control unit 26 to select both the main / sub sound as the reproduced sound (step 116).

If the values do not match in step 112, S0 is compared with a broadcast type identification code representing a bilingual broadcast (step 113). If the values match, the operation control unit 30 outputs only the main sound as the reproduced sound. An instruction is given to the reproduction sound control unit 26 to select (step 117).

If the S0 value does not match the bilingual broadcast identification code in step 113, the operation control section 30 gives an instruction to the reproduction audio control section 26 to select the sub-audio as the reproduction audio (step 114). At this time, since the value of S0 is not a monaural broadcast, a stereo broadcast, or a bilingual broadcast, the program being received is a sub-audio different from the main audio in the audio multiplex broadcast (generally, Commentary voice)
Becomes

In the above steps, image display and sound selection are performed based on the determination of the traveling state of the vehicle and the multiplex sound of the broadcast program being received. The following steps show the operation steps when it is detected that the received program has ended and the next program having another broadcast mode has been received due to the change in the vehicle running state and the program information.

The operation control section 30 confirms the output information from the driving situation detecting section 40 and stores the result as C1 (step 120).

Next, the operation control unit 30 executes step 101
And the value of C0 stored in step 120
The operation control unit 30 compares the value of C1 with the value of C1 (Step 121), and when the values do not match, stores the newly obtained driving condition detection output C1 as C0 (Step 122).
Returning to step 102, the subsequent operations are repeated. If the values match in step 121, it is determined that there is no change in the driving situation, and the flow proceeds to the next step 125.

In step 125, the operation control section 30 acquires the program information (broadcast type identification code) from the EPG / data decoder section 18 and stores the result as S1.

Next, the operation control section 30 executes step 110
And the value of S0 stored in step 125
The operation control unit 30 compares the value of S1 with the value of S1 (step 126), and if the values do not match, stores the newly obtained program information output value S1 as S0 (step 127), and returns to step 1111. Repeat the subsequent operations. If the values match in step 126, it is determined that there is no change in the program information, and the process proceeds to the next step.

At step 130, the operation control unit 30 confirms the operation information from the operation input unit 32 and determines whether or not the selection of the receiving station has been changed (step 130).

When it is detected in step 130 that the operator has performed an operation of changing the channel selection, the operation control unit 30 sends the reception channel selection unit 10 to receive the newly selected reception station. When the completion of reception channel selection is detected based on information from the demodulation unit 12, the process returns to step 110, and the subsequent steps are repeated.

In step 131, it is detected whether or not an operation of canceling the automatic reception / voice selection mode is selected by the operator. If the operator is required to release the automatic mode in step 131, the operation control unit 30 releases the automatic mode of audio selection (step 140), and the reproduction sound of the television broadcast is performed by the operator's selection. Will be able to do it. If the operation of canceling the automatic mode has not been performed by the operator in step 131, the operation control unit 30 returns to step 120 and repeats the subsequent steps.

According to the above-described embodiment, the operation control is performed based on the broadcast type identification code included in the program information transmitted from the broadcasting station in the digital television broadcast and the output from the driving situation detecting section for detecting the driving situation of the vehicle. It is possible to automatically select the sound to be reproduced by the unit 30.

As a further embodiment of the present invention, a digital television broadcast can be transmitted by superimposing various video type identification codes on the broadcast video information. It is possible to transmit a video type identification code indicating that the image is a still image such as a weather chart, instead of a typical moving image.

The above-mentioned video type identification code is detected by video type information detecting means provided in the video signal decoding section 20 in the in-vehicle digital television receiver 1. The video type information detecting means provided in the video signal decoding unit 20 reads the video type identification code superimposed on the video signal decoded by the video decoding unit 20 and sends the video type identification code to the operation control unit 30. The operation control unit 30 includes the video decoding unit 20
When the video type identification code transmitted from the device indicates that the image being received is a still image, the operation status detection unit 40
Can output an instruction to the display video control unit 24 to display a still image on the display unit 34, even when the output from indicates that the vehicle is running.

With such a still image, sufficient information can be provided to the driver together with the voice information without damaging the driver's attention.

FIG. 4 shows an example of a flowchart for displaying a still image. In this flowchart, portions having the same step numbers as those in the flowchart of FIG. 2 perform the same operations as those in FIG. 2, and thus description thereof will be omitted.

Steps 101 to 104 are the same as those in FIG.

In step 201, the operation control unit 30 acquires a video type identification code from the video type information identification means provided in the video signal decoding unit 20, and stores it as P0. In the subsequent step 202, it is determined whether or not P0 is a code representing a still image.

If the result of determination in step 202 is that P0 represents a still image, the screen display is turned on (step 20).
3). That is, even if it is determined in step 102 that the vehicle is running and the screen display is turned off, the steps 202 to 203 are performed so as to display the still image on the screen.
Set with.

If the result of determination in step 202 is that P0 is not a still image, the screen display is turned off in step 204. Then, the process proceeds to Step 110, and thereafter, Step 1
17 are the same as those in the flowchart of FIG.

When the image display and the reproduction sound are selected in the operations up to step 117, the operation control unit 30 proceeds to step 120 to determine the next operation, and changes in the driving condition as in the flow of FIG. Check for Thereafter, in step 210, the operation control unit 30 acquires a video type identification code from a video type information detecting unit newly provided in the video signal decoding unit 20, and stores it as P1. this
A comparison between P1 and P0 acquired in step 201 is determined (step 211).

If the result of determination in step 211 is that P0 is different from P1, the operation control unit 30 sets the newly acquired P1
Is stored as P0 (step 212), the process returns to step 202, and the operations after this step are repeated.

If the result of the determination in step 211 is that the values of P1 and P0 match, the operation control unit 30 proceeds to step 125 and thereafter repeats the same operation as in the flowchart of FIG.

[0049]

As described above, according to the present invention, the reproduction is performed based on the output from the detection unit for detecting the running condition of the vehicle and the broadcast type identification code obtained from the program information on the program being broadcast and received. Since the sound to be selected is selected, it is possible to provide information on the program being received without losing the driver's attention while driving, and
Since the setting is made so that the reproduced sound is automatically selected based on the output of the detection unit and the broadcast type identification code, it is possible to omit the operation that the driver needs to perform to obtain the maximum information. Has an effect.

Further, the present invention provides an additional method for transmitting a video type identification signal superimposed on a video signal detected by a video signal decoding unit, wherein the video type identification signal represents a still image. The video information is set to be automatically displayed on the screen, so that additional information can be provided to the driver, and the information can be more effectively provided from the television broadcast to the driver. It is.

[Brief description of the drawings]

FIG. 1 is a block diagram of an in-vehicle digital television receiver according to the present invention.

FIG. 2 is an operation flowchart of the in-vehicle digital television receiver according to the present invention.

FIG. 3 An example of an EPG

FIG. 4 is a flowchart of a vehicle-mounted digital television receiver that displays a still image.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 In-vehicle digital television broadcast receiving device 10 Reception tuning unit 18 EPG / data decoder unit 20 Video signal decoding unit 22 Audio signal decoding unit 24 Display video control unit 26 Playback audio control unit 30 Operation control unit 32 Operation input unit 34 Display unit 36 Speaker 40 Operation status detector

Claims (4)

[Claims] 1. A receiving channel selecting unit for receiving and selecting a broadcast radio wave, a demodulating unit for demodulating a received and selected broadcast radio wave, a video signal, an audio signal, and program information from a demodulated radio signal. A vehicular digital system comprising: a demultiplexer for distributing to other information signals; a data decoder for decoding the information signal; a video signal decoder for decoding a video signal; and an audio signal decoder for decoding an audio signal. In the television broadcast receiving apparatus, a sensor unit for detecting a driving condition of a vehicle, program information determining means for determining program information of a broadcast wave being received from an information signal decoded by the data decoder unit, and an output of the sensor unit. An in-vehicle digital television broadcast receiving apparatus, comprising: selecting means for selecting video information and audio information to be reproduced from the determined program information. 2. When the sensor unit detects that the vehicle is running and the program information determination unit determines that the program information of the program being received is a program having sub-audio, 2. The in-vehicle digital television broadcast receiver according to claim 1, wherein the selecting means selects a sub-audio as the audio to be reproduced. And a demodulation section for demodulating the received and tuned broadcast radio waves, a video signal, an audio signal, program information and the like from the demodulated radio signal. A demultiplexer for distributing the information signal to other information signals, a data decoder for decoding the information signal, a video signal decoder for decoding a video signal, and an audio signal decoder for decoding an audio signal. A digital television broadcast receiving apparatus, comprising: means for detecting type information of a video included in a video signal of the received broadcast radio wave; and selecting means for selecting an image to be displayed based on the detected type information. An in-vehicle digital television broadcast receiving device, characterized in that: 4. The method according to claim 3, wherein when the type information of the detected video indicates that the video being broadcast is a still image, the selection means selects display of a still image. In-vehicle digital television broadcast receiver.