JP2006340291A - Onboard digital broadcast receiver and program for onboard digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an onboard digital broadcast receiver to receive additional data so as not to disturb viewing of program contents while turning on a main power source of a vehicle. <P>SOLUTION: While an ACC of a vehicle is ON, a program under broadcasting at present from a terrestrial digital TV broadcasting station is not displayed on a display (cf. step 105) and the vehicle is being traveled (cf. step 108), the onboard digital broadcast receiver downloads additional data such as a program guide, a new version program and a broadcasting station logo mark from broadcasting radio waves (cf. steps 110-175). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle digital broadcast receiver and a program for the in-vehicle digital broadcast receiver.

  Conventionally, an apparatus for receiving digital broadcasting such as terrestrial digital broadcasting waits for reception and storage of additional data different from program content such as a new version program and program guide data so as not to disturb viewing of the program content. There was a technique performed in a power supply state.

In addition, as a technology assuming that a digital broadcast receiving device is mounted on a vehicle, even when the main power of the vehicle is turned off, additional data can be downloaded by receiving standby power from a secondary battery. The technology of the digital broadcast receiving apparatus is disclosed in Patent Literature 1 and Patent Literature 2.
Japanese Patent Laid-Open No. 2002-369099 JP 2004-336633 A

  However, in the techniques such as Patent Documents 1 and 2, there may be a problem that downloading is performed only while the main power supply of the vehicle is turned off. For example, it is necessary to secure a power source when the vehicle main power source is off. Moreover, when the position where the main power supply of the vehicle is turned off is a broadcast radio wave incapable area such as in a parking lot, the receiving device cannot receive additional data for a long time. In addition, when the digital broadcast receiving apparatus is mounted on a vehicle, there may be a case where information on receivable channels in the current receiving area is desired to be downloaded as additional data as the receiving area is changed due to movement of the vehicle.

  For this reason, it is desirable that the in-vehicle digital broadcast receiving apparatus can receive additional data even in a travelable state in which the main power of the vehicle is turned on.

  The present invention has been made in view of the above points, and an object of the present invention is to enable an in-vehicle digital broadcast receiving apparatus to receive additional data so as not to obstruct viewing of program content when the main power of the vehicle is on.

  In order to achieve the above object, the invention described in claim 1 is a program content reception display control means for performing control for receiving and displaying the program content included in the digital broadcast radio wave on the display device (3, 4). 21, 22, 23) and receiving additional data different from the program content based on the fact that the program content reception display control means is not functioning when receiving power from the main power source of the vehicle. And an in-vehicle digital broadcast receiving device comprising additional data receiving and storing means (24) for storing.

  In this way, when the in-vehicle digital broadcast receiving device receives power supply from the main power supply of the vehicle, the function of receiving the program content and performing display control is not fulfilled. By downloading the additional data, the additional data can be received so as not to disturb viewing of the program content when the main power supply of the vehicle is on.

  According to a second aspect of the present invention, in the in-vehicle digital broadcast receiving apparatus according to the first aspect, the additional data reception and storage means is the program content reception display control means due to the fact that the vehicle is running. The additional data different from the program content is received and stored based on the fact that the function of the function is inhibited.

  In this way, additional data is received so as not to obstruct viewing of the program content by actively using the timing at which the reception control function of the program content is hindered due to the running of the vehicle. can do.

  According to a third aspect of the present invention, in the in-vehicle digital broadcast receiving device according to the first or second aspect, the additional data reception and storage means displays on the display device a display not by the program content reception display control means. The additional data different from the program content is received and stored based on the fact that the function of the program content reception display control means is hindered due to being performed.

  In this way, by actively using the timing at which the program content reception display control function is hindered due to display not being performed by the program content reception display control on the display device, Additional data can be received so as not to disturb viewing.

  According to a fourth aspect of the present invention, there is provided a control for receiving the program content included in the digital broadcast radio wave and displaying it on the display device (3, 4) when receiving power from the main power source of the vehicle. The function for detecting that the content reception display control means (21, 22, 23) performing the function is not functioning, and the additional data different from the program content based on the detection by the detection function This is a program that causes a computer to realize the function of receiving and storing.

  Thus, the invention described in claim 1 can also be understood as a program.

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows an in-vehicle composite system 1 according to the present embodiment, a mode switch 2 connected to the in-vehicle composite system 1, a display 3, a speaker 4, and a vehicle signal detection unit 5. As will be described in detail below, in the in-vehicle composite system 1, the ACC of the vehicle is on, the program currently being broadcast by the terrestrial digital TV broadcast station is not displayed on the display 3, and the vehicle is running Sometimes, additional data such as a program guide, a new version program, a broadcast station logo mark, and the like are downloaded from broadcast radio waves.

  The mode change switch 2 includes a touch panel, a mechanical switch, and the like, and outputs a signal for switching the system mode to the in-vehicle composite system 1 upon receiving a user operation. The display 3 displays a video based on the video signal received from the in-vehicle composite system 1. The speaker 4 outputs sound based on the sound signal received from the in-vehicle composite system 1. The vehicle signal detection unit 5 outputs to the in-vehicle composite system 1 signals related to vehicle information, such as a vehicle IG on / off signal, an ACC on / off signal, an engine start / stop signal, and a vehicle speed pulse signal.

  The in-vehicle composite system 1 includes a system control unit 11, a digital TV receiving unit 12 (corresponding to an example of an in-vehicle digital broadcast receiving device), an audio head unit unit 13, a car navigation unit 14, and an antenna 15. The in-vehicle combined system 1 operates by receiving power supply from a main battery (not shown) of the vehicle while the ACC of the vehicle is on.

  The system control unit 11 selects one of the digital TV reception unit 12, the audio head unit unit 13, and the car navigation unit 14 based on the signal for switching the system mode from the mode switch 2 and selects the selected one. The video signal and audio signal received from the object are output to the display 3 and the speaker 4, respectively. Further, the system control unit 11 outputs data based on the signals received from the mode switch 2 and the vehicle signal detection unit 5 to the digital TV reception unit 12, the audio head unit unit 13, and the car navigation unit 14. The system control unit 11 mediates data exchange among the digital TV receiving unit 12, the audio head unit unit 13, and the car navigation unit 14. For example, when data addressed to the digital TV receiving unit 12 is received from the car navigation unit 14, the data is output to the digital TV receiving unit 12.

  However, when the system control unit 11 detects that the host vehicle is traveling based on the vehicle speed pulse signal from the vehicle signal detection unit 5 (that is, the vehicle speed is substantially larger than zero), the system control unit 11 and the speaker 3 The digital TV receiving unit 12 cannot be selected as the source of the video signal and audio signal to be output to 4. Alternatively, even if it can be selected, the video data received by the digital TV receiver 12 cannot be output to the display 3. Such a state in which the video from the digital TV receiving unit 12 cannot be displayed on the display 3 due to the traveling of the vehicle is referred to as a state in which traveling regulation is applied. In addition, in order for the passenger in the passenger seat or the rear seat to watch TV while traveling, such a travel restriction is released by the user making a predetermined input to such an input device (not shown). It may be.

  Note that the system control unit 11 may be realized as a general-purpose microcomputer that executes a program that realizes the above functions, or hardware having a circuit configuration that realizes the above functions (for example, an FPGA or the like). May be realized as a programmable circuit).

  The digital TV receiving unit 12 extracts video data and audio data of the program content from the radio wave of the terrestrial digital TV broadcast received by the antenna 15, and the system control unit 11 outputs the audio signal based on the video data and the audio signal based on the audio data. Output to. Further, the digital TV receiving unit 12 accumulates additional data such as program guide data, latest version program, broadcast station logo mark, etc. in a storage medium from the radio waves of the terrestrial digital TV broadcast received by the antenna 15. Details of the configuration and operation of the digital TV receiver 12 will be described later.

  When the audio head unit unit 13 receives information from the system control unit 11 that the audio head unit unit 13 is selected by operating the mode switching switch 2, the audio head unit unit 13 reproduces music by an audio device such as a CD player or an MD player. And the audio signal output from the audio device is output to the system control unit 11. When the audio head unit 13 receives information from the system control unit 11 that the audio head unit 13 is not selected by operating the mode switch 2, the reproduction is stopped.

  The car navigation unit 14 includes a car navigation control unit 41, a host vehicle position detection unit 42 including a GPS receiver, and a map information storage unit 43. The car navigation control unit 41 reads out a map near the current position from the map information storage unit 43 based on the current position information of the host vehicle received from the host vehicle position detection unit 42 and outputs the map to the system control unit 11 as a video signal. To do. In addition, when the car navigation unit 14 receives a user destination setting from an input device (not shown) or the like, the car navigation unit 14 calculates an optimum guide route from the current position to the destination, and a video signal obtained by superimposing the calculated guide route and the map. , And a guidance voice signal to the guidance route is output to the system control unit 11.

  Moreover, in the map in the map information storage unit 43, the area included in the map is divided into a plurality of areas. This division is such that different terrestrial digital broadcast station groups are different in different areas, and within the same area, the terrestrial digital broadcast station groups that can be received are the same. Hereinafter, the areas divided by this division are referred to as the same broadcasting station area. When the current position of the host vehicle enters from the same broadcast station area to another same broadcast station area, the car navigation unit 14 sets the data to that effect as data destined for the digital TV receiver 12 and the system control unit 11 is output.

  Here, a detailed configuration of the digital TV receiving unit 12 will be described. The digital TV receiving unit 12 includes a tuner unit 21, a TS (Transport Stream) demodulating unit 22, a video / audio output unit 23, a digital TV reception control unit 24, and a memory unit 25.

  The tuner unit 21 selects one reception channel in the direction of digital terrestrial TV based on a user channel selection operation or the like with respect to an input device (not shown), and the signal of the broadcast radio wave received by the antenna 15 is selected from the selected channel data. And the extracted data is output to the TS demodulator 22.

  The TS demodulating unit 22 uses MPEG data (corresponding to program content) for video and audio output to the display 3 and the speaker 4 when viewing a normal program from data of a specific channel received from the tuner unit 21. Either one or both of the additional data is extracted. The extracted MPEG data is output to the video / audio output unit 23, and the extracted additional data is output to the digital TV reception control unit 24.

  There are some additional data that can be taken out together with the program content and others that cannot be taken out. For example, since download notification information for specifying additional data that can be downloaded, which will be described later, is operated so as to be included in as many channels as possible, there is a high possibility that it can be extracted together with program content. However, new program data and program guides for channels that are not currently being viewed are not included in each channel, as in the case of announcement information. Can not be taken out. Such additional data is additional data that is highly likely not to be received / stored without affecting the viewing of the currently broadcast program.

  The video / audio output unit 23 performs a decoding process necessary for the MPEG data received from the TS demodulation unit 22 and outputs the video signal and audio signal obtained as a result to the system control unit 11.

  The digital TV reception control unit 24 is a part for recording additional data received from the TS demodulation unit 22 in the memory unit 25. The digital TV reception control unit 24 includes a CPU and the like, and implements various processes by executing programs included in the memory unit 25.

  FIG. 2 shows the processing realized by the digital TV reception control unit 24 in a block configuration. As shown in this figure, the memory unit 25 has a rewritable memory, which is a nonvolatile NVRAM 251, a volatile RAM 252, and a nonvolatile program memory 253. The digital TV reception control unit 24 reads programs for the active mode information management process 241, the acquisition additional data list storage process 242, the additional data acquisition process 243, and the additional data acquisition control process 244 from the program memory 253, respectively. Run in parallel (ie multitasking). Between these processes 241 to 244, data is exchanged through writing and reading of data to and from the memory unit 25.

  In the active mode information management process 241, the digital TV reception control unit 24 outputs information based on the signal from the mode switch 2 from the system control unit 11, that is, the current system control unit 11 outputs to the display 3 and the speaker 4. Based on a signal indicating which one of the digital TV receiving unit 12, the audio head unit unit 13 and the car navigation unit 14 is selected as a source of video and audio signals, a function for receiving and displaying digital TV (hereinafter referred to as digital). The information indicating whether or not the TV function is active, that is, the data indicating whether or not the digital TV receiving unit 12 is selected by the system control unit 11 is passed to the additional data acquisition control processing 244.

  In the acquisition schedule additional data list storage process 242, the digital TV reception control unit 24 adds the acquisition schedule addition based on the download notification information specifying the downloadable additional data among the additional data sent from the TS demodulation unit 22. Create a data list. For example, when a new program for the digital TV reception control unit 24 or logo data of a broadcasting station is recorded in the download notification information, it is added to the acquisition scheduled additional data list. At this time, if a downloadable time or a downloadable channel is specified for specific additional data, the specification is also recorded in the acquisition scheduled additional data list in association with the additional data. This acquisition schedule additional data list is recorded in the NVRAM 251.

  In addition, in the process of the acquisition scheduled additional data list storage process 242, the digital TV reception control unit 24 uses the system control to output the data output by the car navigation unit 14 and straddling the boundary of the same broadcasting station area where the host vehicle is adjacent. When received via the unit 11, additional data relating to the new same broadcast station area, such as the newly entered channel list of the same broadcast station area, may be added to the download list. In addition, in the process of the acquisition schedule additional data list storage process 242, the digital TV reception control unit 24, based on an instruction (for example, reservation of channel scan, update of logo data, etc.) by the user using an input device (not shown), A function for adding additional data to be designated may be added to the acquisition scheduled additional data list.

  In the additional data acquisition process 243, the digital TV reception control unit 24 receives additional data included in the download instruction data received from the additional data acquisition control process 244 from the TS demodulation unit 22, and further receives the additional data received from the memory unit 25. Store in the appropriate storage medium. Examples of suitable storage media include NVRAM 251 for logo data, RAM 252 for channel list, and program memory 253 for new programs. In addition, in the process of the additional data acquisition process 243, when it is necessary to change the reception channel for downloading additional data, the digital TV reception control unit 24 controls the TS demodulation unit 22 to change the reception channel.

  In the additional data acquisition control processing 244, the digital TV reception control unit 24 receives the data passed from the active mode information management processing 241, the acquisition planned additional data list recorded by the acquisition planned additional data list storage processing 242, and the system control unit 11. Based on the received vehicle speed pulse data and the like, a download instruction to the additional data acquisition process 243 based on the determination whether to receive / store (that is, download) the additional data and the determination to download is performed. For this process, the digital TV reception control unit 24 repeatedly executes the additional data acquisition control program 100 shown in FIG.

  In the execution of the additional data acquisition control program 100, the digital TV reception control unit 24 first determines in step 105 whether the digital TV function is currently active based on the data passed from the active mode information management process 241. If it is active, step 105 is executed again. If it is not active, step 108 is executed subsequently.

  In step 108, based on the vehicle speed pulse data received from the system control unit 11, it is determined whether or not the host vehicle is traveling, that is, whether or not the vehicle speed is substantially greater than zero. Step 110 is executed, and if it is not running, Step 105 is executed subsequently.

  In step 110, user setting information related to downloading additional data is read from the NVRAM 251. This user setting information is data recorded in the NVRAM 251 in accordance with a user input using an input device (not shown) by the digital TV reception control unit 24 executing a predetermined program. The contents of this data include whether or not the program guide data is preferentially downloaded over other additional data, the priority of downloading additional data other than the program guide data, and the border between adjacent broadcast station areas. Whether the channel list is downloaded and the channel is rescanned, the program table acquisition completion condition (that is, how many days the download is determined to be download completion), the download interval (for example, 2 hours), and the like.

  Subsequently, in step 115, in the read user setting information, it is determined whether or not the download of the program guide data is prioritized over others, and if it is prioritized, step 120 is subsequently executed. Subsequently, step 130 is executed.

  In step 120, it is determined whether or not the current amount of program guide data in the NVRAM 251 satisfies the acquisition completion condition described in the user setting information, that is, whether or not the acquisition of the program guide has ended. If it is determined that it is, step 125 is subsequently executed, and if it is determined that it is not completed, step 130 is subsequently executed.

  In step 125, command data is passed to the additional data acquisition process 243 so that the program guide is downloaded until the acquisition completion condition described in the user setting information is satisfied, and if the download by the additional data acquisition process 243 is completed, Subsequently, step 130 is executed.

  In step 130, it is determined whether or not additional data is described in the acquisition-scheduled additional data list recorded in the NVRAM 251, that is, whether there is additional data that can be acquired. If not, continue with step 160.

  In step 135, it is determined whether or not a plurality of additional data is described in the acquisition-scheduled additional data list. If there are a plurality of additional data, then step 140 is executed. Is to be downloaded, and then step 150 is executed.

  In step 140, the download priority order between the additional data described in the user setting information is read. Subsequently, in step 145, based on the read download priority order, the highest priority order in the currently acquired additional data list to be acquired. The additional data is specified as the additional data to be downloaded, and then step 150 is executed.

  In step 150, command data is passed to the additional data acquisition process 243 so as to download the additional data specified as the download target. When the download by the additional data acquisition process 243 is completed, step 155 is subsequently executed. In step 155, the description of the additional data downloaded in the immediately preceding step 150 is deleted from the acquisition scheduled additional data list, and then step 130 is executed again. If the user setting information includes a description not to download the channel list, the description of the channel list is deleted from the acquisition scheduled additional data list.

  By repeating steps 130 to 155 as described above, all of the additional data in the acquisition-scheduled additional data list other than the additional data described as not being downloaded in the user setting information is sequentially downloaded.

  In step 160 after the downloading of the additional data in the scheduled additional data list is completed, as in step 120, it is determined whether or not the program guide has been acquired. If not, then step 165 is executed. If it is finished, step 170 is executed. In step 165, the process for downloading the program guide is performed by the same process as in step 125, and then step 170 is executed.

  In step 170, the timer starts counting from zero seconds, and then in step 175, the timer waits until the specified time, that is, the download interval described in the user setting information elapses.

  When the digital TV reception control unit 24 receives information from the system control unit 11 that the digital TV function has changed from inactive to active during downloading of the additional data, the digital TV reception control unit 24 cancels the currently executing download. Then, the execution of the additional data acquisition control program 100 ends.

  The digital TV reception control unit 24 executes the additional data acquisition control program 100 as described above, so that the digital TV function is inactive during the operation (that is, when ACC is on). (Refer to step 105) and the travel restriction is imposed because the host vehicle is traveling (refer to step 108), repeatedly (refer to steps 170 and 175), in the acquisition scheduled additional data list The additional data (mainly additional data that cannot be downloaded together with the program viewing) (see step 130) are downloaded (see step 135, 140, and 145) in the order based on the user settings relating to the download (see step 155) (see step 155). Step 150, additional data acquisition processing 243).

  The digital TV receiving unit 12 first downloads the program guide data before or after downloading the additional data in the additional data list to be acquired based on the user settings regarding the download (see step 110) (steps 115 to 115). 125, 160, 170).

  As described above, when the digital TV receiving unit 12 is supplied with power from the main power supply of the vehicle, the function of receiving the program content and performing the display control is not performed (that is, as a result, the program is given to the passenger). The additional data is downloaded based on the fact that the content is not presented), and the additional data is received so as not to interfere with the viewing of the program content when the main power of the vehicle is on. be able to.

  Then, as a state in which the function of receiving the program content and performing the display control is not fulfilled, “the vehicle is running and the display is not based on the program content reception display control in the display device (that is, the audio head unit unit). By actively using the timing at which the program content reception / display control function is hindered due to “the state that the display by the navigation system 13 or the car navigation unit 14 is being performed”, viewing of the program content is not disturbed. As such, additional data can be received.

As described above, if the home digital broadcast receiving apparatus is used, the processing performed during the standby time is performed during traveling, so that power is supplied from the vehicle side, and reception and display control of the digital TV can be performed. Processing in which the timing not performed is regarded as the pseudo standby time is performed.
(Other embodiments)
As mentioned above, although embodiment of this invention was described, the scope of the present invention is not limited only to the said embodiment, The various form which can implement | achieve the function of each invention specific matter of this invention is included. It is.

  For example, the in-vehicle digital broadcast receiver of the present invention only needs to be able to receive digital broadcasts, and the digital broadcast is not limited to terrestrial digital TV broadcasts, but may be other digital TV broadcasts, It may be a digital radio broadcast.

  Further, the digital TV reception control unit 24 may not execute any one of Step 105 and Step 108 in the additional data acquisition control processing 244. For example, the additional data may be downloaded based only on the fact that the digital TV is not active. In this case, downloading of the additional data starts when the TV function is in an inactive state immediately after the ACC of the vehicle is turned on, and when the TV function transitions from an active state to an inactive state. Further, the additional data may be downloaded based only on the fact that the vehicle is traveling.

  Note that the digital TV receiving unit 12 may operate only when the IG of the vehicle is turned on. In other words, the digital TV receiving unit 12 only needs to be able to download additional data when the main power of the vehicle is on (for example, IG on or ACC on).

  Further, the digital TV receiving unit 12 may not be managed integrally with the audio head unit 13 and the car navigation unit 14 by the system control unit 11 as in the above embodiment. For example, the system control unit 11 does not exist, the digital TV receiving unit 12 and the audio head unit unit 13 communicate with each other, and exchange information on which video / audio signal is output to the display 3 and the speaker 4. If possible, the digital TV receiving unit 12 can determine whether to download additional data based on the information.

  In addition, the display that is not based on the program content reception display control is not limited to the display in the above-described embodiment. For example, the display image and audio of the television program recorded in the past and the sound on the display 4 and the speaker 4 It may be a display.

  In a state where the function of receiving program content and performing display control is not performed, which causes the digital TV receiving unit 12 to download additional data, the display function of the display 3 is turned off by a user operation. It may be in the state.

  Further, the additional data is not limited to the above, and any data other than the program content data is sufficient.

  In the user setting information, the priority order may be assigned to the download of the program guide in the same format as the download of other additional data.

  Further, the digital TV reception control unit 24 may be realized as one circuit (for example, a circuit in which a circuit configuration such as FPGA is programmable) that realizes the above-described functions, or the active mode information management process 241. A circuit for realizing the function, a circuit for realizing the function of the acquisition scheduled additional data list storage process 242, a circuit for realizing the function of the additional data acquisition process 243, and a circuit for realizing the function of the additional data acquisition control process 244 It may be.

  Further, the digital TV reception control unit 24 itself may be a microcomputer having a memory, and the acquisition schedule additional data list storage process 242 may record the acquisition schedule additional data list in a memory in the microcomputer. .

It is a block diagram which shows the structure etc. of the vehicle-mounted composite system. 4 is a block diagram showing a configuration of processing contents of a digital TV reception control unit 24. FIG. 7 is a flowchart of an additional data acquisition control program 100 that is executed by the CPU of the digital TV reception control unit 24 to realize the additional data acquisition processing 243.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted complex system, 2 ... Mode changeover switch, 3 ... Display, 4 ... Speaker,
5 ... Vehicle signal detector, 11 ... System controller, 12 ... Digital TV receiver,
13 ... Audio head unit part, 14 ... Car navigation part, 15 ... Antenna,
21 ... Tuner unit, 22 ... TS demodulation unit, 23 ... Video / audio output unit,
24 ... Digital TV reception control unit, 25 ... Memory unit, 41 ... Car navigation control unit,
42 ... own vehicle position detection unit, 43 ... map information storage unit,
100: Additional data acquisition control program, 241: Active mode information management process,
242 ... Acquisition scheduled additional data list storage process, 243 ... Additional data acquisition process,
244 ... Additional data acquisition control processing, 251 ... NVRAM, 252 ... RAM,
253: Program memory.

Claims (4)

Program content reception display control means (21, 22, 23) for controlling to receive the program content included in the digital broadcast radio wave and display it on the display device (3, 4);
Additional data receiving and accumulating means for receiving and accumulating additional data different from the program content based on the fact that the program content receiving display control means is not functioning when receiving power from the main power supply of the vehicle (24). The vehicle-mounted digital broadcast receiver provided with. The additional data reception / storage means receives and stores additional data different from the program content based on the function of the program content reception display control means being hindered due to the vehicle traveling. The in-vehicle digital broadcast receiver according to claim 1. The additional data reception storage means is based on the fact that the function of the program content reception display control means is obstructed due to the display not being performed by the program content reception display control means on the display device. The in-vehicle digital broadcast receiver according to claim 1, wherein additional data different from the program content is received and stored. Content reception display control means (21, 22) for performing control for receiving program content included in the digital broadcast radio wave and displaying it on the display device (3, 4) when receiving power supply from the main power source of the vehicle , 23) detecting that the function is not performed, and
A program for causing a computer to realize a function of receiving and storing additional data different from program content based on the detection by the detecting function.

Images