JP3992534B2 - In-vehicle audiovisual apparatus and in-vehicle broadcast receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an in-vehicle audiovisual apparatus capable of receiving an emergency alert broadcast.
[0002]
[Prior art]
A digital broadcast receiver that receives digital broadcasts using satellites or terrestrial waves selects an arbitrary broadcast wave from a plurality of broadcast waves received through an antenna by a tuner, and a plurality of channels included in the selected broadcast wave An arbitrary channel is selected by demultiplexing, a digital signal of the selected channel is taken out, and a video / audio signal is output by decoding the digital signal.
[0003]
By the way, in such a digital broadcasting system, an emergency warning broadcast is transmitted when a disaster occurs, and a mechanism for forcibly receiving the emergency warning broadcast by a receiving device is prepared. The receiving apparatus monitors a start control bit included in a TMCC (Transmission and Multiplexing Configuration Control) signal that is a signal for performing transmission control such as a transmission method, a frame structure, and TS_ID, and the start control bit changes from 0 to 1. While the activation control bit is 1, the emergency alert descriptor in the PMT (Program Map Table) of the reception channel is monitored. At this time, if “start_end_flag = 1” and “area_code = area-designated area designator set in the receiving apparatus”, the channel described in service_id in the PMT is selected and received. When the emergency alert descriptor is deleted from the PMT of the reception channel, the reception device ends the emergency alert broadcast (EWS) reception process.
[0004]
[Problems to be solved by the invention]
If the user is watching the television at the time of the emergency alert broadcast, the emergency alert broadcast automatically switched from the program being viewed can be viewed. TMCC can be received even if the receiver is in the TV OFF (standby state) by operating the tuner and CPU, and during the emergency alert broadcast, the TV ON process is automatically executed to display the emergency alert broadcast video. It is possible to present.
[0005]
By the way, in recent years, in-vehicle television receivers have been provided, but it is not desirable for the driver to watch the screen while driving to ensure safety, and when the parking brake is activated as a preventive measure Alternatively, the video is displayed only when the shift lever is put into the parking position and the parking measure (parking operation) is taken. Therefore, TV images cannot be obtained while driving, and it is necessary to rely on information of only TV sound. Such measures are considered to be taken when an in-vehicle digital broadcast receiving device capable of receiving an emergency alert broadcast is provided, and the detailed information of the emergency alert broadcast broadcast while traveling is seen. It is thought that a situation that cannot be done will occur.
[0006]
In addition, when an emergency warning broadcast is issued while leaving the car for a while, such as parking, there is a possibility that this may be missed. Furthermore, when sound output other than TV sound (for example, CD playback) is performed during driving, the sound of emergency alert broadcasting may not be heard depending on the volume. Also, when the car navigation system is displayed while traveling, the emergency warning broadcast is missed.
[0007]
In view of the above circumstances, an object of the present invention is to provide an in-vehicle audiovisual apparatus and an in-vehicle broadcast receiver that can eliminate as much as possible a situation in which a driver misses or misses an emergency warning broadcast. And
[0008]
[Means for Solving the Problems]
The in-vehicle audiovisual apparatus according to the present invention is an in-vehicle audiovisual apparatus having a plurality of audio / video output sources, including a broadcast receiving apparatus capable of receiving an emergency alert broadcast as one of the audio / video output sources. When the broadcast receiving apparatus receives an emergency alert broadcast when audio / video is output from another source, control means is provided for performing processing so that the driver can listen to the audio from the broadcast receiving apparatus ( Hereinafter, this section is referred to as a first configuration).
[0009]
In the said structure, it processes so that a driver | operator can hear the audio | voice from a broadcast receiver. For example, the sound from the broadcast receiving apparatus is made louder than other sources (for example, radio, CD player, DVD player, cassette tape, car navigation system, etc.), or the sound from other sources is muted. In this mute process, a process of outputting the sound from the broadcast receiving apparatus at a constant volume is performed without being restricted by the sound volume setting state of other sources. Thereby, the driver can be surely heard the sound of the emergency warning broadcast.
[0010]
The on-vehicle audiovisual apparatus having the first configuration may be configured to output a broadcast reception video for a short time together with the audio processing output at the time of emergency alert broadcasting when traveling. The on-vehicle audiovisual apparatus having the first configuration is configured to output a broadcast reception video together with the audio processing output at the time of emergency alert broadcasting when it is estimated that there is a person in the vehicle in a non-running state. May be.
[0011]
The in-vehicle broadcast receiving apparatus according to the present invention is an in-vehicle broadcast receiving apparatus capable of receiving an emergency warning broadcast, and stores the received content in the storage means when the emergency warning broadcast is received while the vehicle is running. It is characterized by being configured (hereinafter referred to as the second configuration in this section).
[0012]
If it is said structure, it will become possible to view although it is not real-time by reproducing the information preserve | saved at a memory | storage means, although it is not real time.
[0013]
In the second configuration, it is preferable that the content of the emergency alert broadcast stored in the storage unit is reproduced when the traveling is stopped and the parking operation is performed. As a method of starting playback, it is possible to display some message and play it by the user's playback operation. However, as described above, it is more reliable that the emergency warning broadcast is played back automatically based on the parking operation. Will be.
[0014]
The in-vehicle broadcast receiving apparatus of the present invention is an in-vehicle broadcast receiving apparatus capable of receiving an emergency warning broadcast, and after an estimated time when there is no person in the vehicle in a non-running state, the emergency warning broadcast is transmitted for a certain period of time. When the emergency alert broadcast is received during this period, the received content is saved in the storage means (hereinafter referred to as the third configuration in this section).
[0015]
With the above configuration, even when an emergency warning broadcast is issued while leaving the vehicle for a while, such as parking, the oversight can be minimized.
[0016]
In the third configuration, it is preferable to reproduce the content of the emergency alert broadcast stored in the storage means when it is estimated that there is a person in the vehicle in the non-running state. As a method of starting playback, it may be possible to display some message and playback by the user's playback operation, but automatically based on the assumption that there are people in the vehicle in the non-running state as described above. This will ensure that the emergency alert broadcast is reproduced.
[0017]
In the above configuration or the third configuration, it is preferable that the reception standby state is canceled when information indicating that the remaining amount falls below a predetermined value is obtained from the remaining amount detecting unit of the on-vehicle battery. According to this, it is possible to prevent a situation in which the remaining battery power is exhausted due to standby for receiving the emergency alert broadcast.
[0018]
The in-vehicle broadcast receiving apparatus of the present invention is an in-vehicle broadcast receiving apparatus capable of receiving an emergency warning broadcast, and includes a table in which position information and an area designator for emergency warning broadcasting are associated with each other, and a car navigation system Is configured to set an area designator for emergency alert broadcasting based on the position information obtained from (hereinafter referred to as the fourth configuration in this section).
[0019]
With the above configuration, even if the reception location changes due to driving of the vehicle, the area designator is set in response to this change, so that overlooking of the emergency warning broadcast is prevented.
[0020]
In the fourth configuration, it is preferable that a plurality of area designators for emergency alert broadcasting are set corresponding to a plurality of areas on the travel route to the destination input to the navigation system. According to this, not only the emergency alert broadcast corresponding to the current location but also the emergency alert broadcast corresponding to each location up to the destination can be viewed.
[0021]
The in-vehicle broadcast receiving apparatus of the present invention is an in-vehicle broadcast receiving apparatus capable of receiving an emergency warning broadcast, and includes a table in which position information is associated with information on broadcasting stations in various locations, and is obtained from a car navigation system. Based on the position information to be selected, the local broadcast station that is performing the emergency alert broadcast is selected from the table, and the emergency alert broadcast reception standby state is formed in a situation where broadcast viewing is not selected. It is characterized by that.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing an in-vehicle audiovisual apparatus that is equipped with a digital broadcast receiving apparatus capable of receiving an emergency warning broadcast and systemized with an audio device such as a car navigation system and a radio or CD player.
[0023]
The digital broadcast receiver 5 includes an antenna 1 that receives a terrestrial digital broadcast wave, a tuner 2, a demultiplexer (DEMUX) 3, and an AV decoder 4. The tuner 2 extracts a signal of a specific frequency from the high frequency digital modulation signal including video / audio data. Further, the tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, thereby demodulating the selected digital modulation signal and outputting a transport stream. The demultiplexer 3 separates the transport stream into an MPEG2 (Moving Picture Experts Group 2) video stream, an audio stream, and PSI / SI (Program Specific Information / Service Information). The demultiplexer 3 supplies the video stream and the audio stream to the AV decoder 4 and supplies program information included in the PSI / SI to the system controller 17. A channel selection operation or the like for the digital broadcast receiving apparatus 5 is performed using the operation unit 15. Further, the system controller 17 performs channel selection control in the digital broadcast receiving device 5 (processing for reading data necessary for channel selection from the memory 16 and sending channel selection data necessary for channel selection to the tuner 2) and other controls. To do. Note that a plurality of services are multiplexed in the transport stream, and the process for selecting an arbitrary service from among them is determined by the packet ID of the arbitrary service in the transport stream from the PSI / SI. It becomes possible by taking out data such as whether or not it is multiplexed. The transport stream can also be selected based on PSI / SI information.
[0024]
The demultiplexer 3 and the system controller 17 constitute an emergency warning broadcast detection system. This emergency alert broadcast detection system monitors the activation control bit included in the TMCC (Transmission and Multiplexing Configuration Control) signal. When the activation control bit changes from 0 to 1, the PMT of the reception channel while the activation control bit is 1 Monitor the emergency alert descriptor in (Program Map Table). At this time, if “start_end_flag = 1” and “area_code = area designator designated by the prefecture set in the receiving apparatus”, the channel described in service_id in the PMT is selected and received. Then, when the emergency alert descriptor is deleted from the PMT of the reception channel, the reception device ends the emergency alert broadcast (EWS) reception process.
[0025]
The AV decoder 4 includes a video decoder that decodes the video stream output from the demultiplexer 3 and an audio decoder that decodes the audio stream. The video decoder decodes the input variable length code to obtain a quantization coefficient and a motion vector, and performs inverse DCT conversion, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input encoded signal to generate audio data. The audio / video data generated by the decoding is output to the AV selector / mixer 19.
[0026]
The car navigation unit 12 includes a GPS (Global Positioning System) receiver 6 that performs positioning by receiving radio waves from a satellite, a self-contained navigation device 7 that performs positioning using inertia or the like even when GPS radio waves do not reach, a GPS receiver The vehicle position calculation unit 8 determines the position of the vehicle from the positioning data of 6 and the positioning data of the self-contained navigation device 7 and the data read from the map information storage medium / reading device 9, and determines the position on the map. The route search processing unit 10 determines a route for performing navigation from the current position of the host vehicle to the destination input in advance at the time of departure, and the graphic drawing unit 11 that displays an image by superimposing the map and the host vehicle position. In addition, the car navigation unit 12 may include a voice synthesis unit for voice guidance.
[0027]
Such an in-vehicle audiovisual apparatus is configured to function in cooperation with the operation of the car, and the system controller 17 is provided with a parking / stop / open lock for detecting parking / stop of the car and unlocking / locking of the door. Information from the detection device 13 and information from the voltage monitoring circuit 14 that monitors the voltage of the vehicle-mounted battery 25 are supplied. The operation unit 15 not only operates the digital broadcast receiving device 5 but also operates audio equipment such as the CD player 18 and the FM / AM receiver 22, operates the car navigation unit 12, and signals from the AV selector / mixer 19 Also used for selection operations. In addition to the information required by the digital broadcast receiver 5, the memory 16 includes information required by the car navigation unit 12, and further, a video / audio unit (a CD player 18, an AV selector / mixer 19, an audio amplifier 20, FM / AM receiver 22 equipped with antenna 21 and display unit 24) storing setup information and control programs, and emergency warning broadcasts received during running and parking (predetermined time after engine stop, etc.) The image and sound are stored.
[0028]
The AV selector / mixer 19 performs selection switching and mixing processing on the video / audio output of the AV decoder 4, the audio output of the CD player 18, and the audio output of the FM / AM receiver 22. The audio amplifier 20 amplifies the output of the AV selector / mixer 19 and supplies it to the speaker 23. The display unit 24 is composed of a liquid crystal display panel, for example, and displays video (digital broadcast reception video, car navigation video, etc.) output from the AV selector / mixer 19.
[0029]
In the ignition key switch 27, four positions of OFF-Acc-ON-Egn are set, which are the respective states at the time of parking-power supply to the electrical component-engine ON-starter motor operation. The ignition key switch 27 is connected to an automobile electrical component (engine control device, wiper, horn, fan motor, etc.) 26. The switches 28, 29, and 30 are turned on / off according to instructions from the system controller 17, and the power lines 31, 32, and 33 are turned on / off by turning on / off the switches 28, 29, and 30, respectively. Specific ON / OFF contents will be described later. On the other hand, the power line 34 is connected to the system controller 17, the memory 16, the operation unit 15, and the voltage monitoring unit 14, and always supplies power from the battery 25 regardless of the position of the key switch 27 (the key is removed). The voltage monitoring unit 14 monitors the voltage drop of the battery 25, the memory 16 holds the stored contents, and the operation unit 15 and the system controller 17 are in the input standby state. Note that illustrations of fuses, relays, and automotive control devices actually included in the power supply system are omitted.
[0030]
When the driver returns to the car and unlocks it, the parking / opening / locking detecting device 13 detects the unlocking, and the information is transmitted to the system controller 17. When the driver turns the key switch 27 to the Acc position with the key, the system controller 17 turns on the switches 28, 29, and 30. As a result, the CD player 18, the FM / AM receiver 22, the AV selector / mixer 19, the audio amplifier 20, the display unit 24, the digital broadcast receiving device (hereinafter sometimes simply referred to as TV) 5, and the car navigation system 12 It becomes possible to supply power to the audio device, and it becomes possible to operate and view each audio device, TV, and car navigation. The operation unit 15 selects TV, navigation, CD, and radio. Based on this selection, the AV selector / mixer 19 performs selection / mixing (volume control), and the display unit 24 has a TV screen or a car navigation screen. Is displayed. The audio signal output from the speaker 23 is a mixture or switching of TV sound, CD or radio sound, and car navigation guide sound by the AV selector / mixer 19. For example, the sound may be mixed with CD sound. When the voltage monitoring unit 14 detects that the voltage of the battery 25 has dropped below the set value, the information is transmitted to the system controller 17 and the switches 28, 29, and 30 are turned off. When the starter motor (not shown) is operated with the key switch 27 in the Egn position, the engine starts and the key is returned to the ON position.
[0031]
When the shift lever is put into the drive position and the parking brake is released, the vehicle can run, and when the accelerator is depressed, the car starts running. At this time, the parking / opening / locking detecting device 13 senses that the vehicle has moved from the parking / stopping state to the traveling state, and transmits the information to the system controller 17. Here, in the case where the user is watching TV while parked, when the parked state is canceled, TV sound is continuously output from the speaker 23, but the TV video displayed on the display unit 24 is displayed on the AV selector. / Switched to the navigation screen or graphic screen by the mixer 19, or the output is muted and the digital broadcast receiver 5 maintains the broadcast reception standby state while taking measures to prevent the driver from gazing at the TV image And we wait for emergency warning broadcast. Further, even when the TV is not selected before traveling, when the TV is turned off during traveling, or when switching to playback of another audiovisual source, the digital broadcast receiving device 5 is in an emergency alert in the traveling area. Select the channel that is sending the broadcast and wait for the emergency alert broadcast.
[0032]
When the emergency alert broadcast detection unit detects an emergency alert broadcast while traveling, the system controller 17 controls the AV selector / mixer 19 to output only the TV audio output of the digital broadcast receiver 5 to the audio amplifier 20. Other audio devices and car navigation guide voices are prevented from being input to the audio amplifier 20. In addition, it is not constrained by the volume adjustment of the operation unit 15 that determines the output volume of the acoustic device, and for example, even when the volume is reduced, the TV sound is output from the speaker 23 at a constant volume that can be heard by the driver. It is also possible to display the emergency alert broadcast on the screen only for a few seconds, for example, so that the driver does not pay close attention to the video display while traveling. Further, after the display for several seconds, a message such as “please perform parking operation to view the emergency alert broadcast” may be displayed.
[0033]
When the emergency alert broadcast is received during traveling, the system controller 17 causes the memory 16 to record the received content of the emergency alert broadcast. When traveling is stopped and the parking state is entered, this state is detected by the parking / opening / locking detecting device 13 and transmitted to the system controller 17. At this time, the system controller 17 reads the broadcast reception content stored in the memory 16 and sends it to the AV decoder 4. The video signal generated by the AV decoder 4 is selected by the AV selector / mixer 19 under the control of the system controller 17 and sent to the display unit 24. Thereby, the video of the emergency alert broadcast stored during the traveling is displayed.
[0034]
Here, when an emergency disaster occurs or is likely to occur, emergency warning broadcasting is automatically performed even when the user is not watching the broadcast by sending a signal superimposed on the broadcast wave from the broadcasting station side. The receiver (digital broadcast receiver 5) is activated to transmit disaster information. In addition, the area where the emergency alert broadcast receiver is activated can be limited and selected, and if the area code corresponding to the receiver installation location is set in advance, only the receiver that matches the area code set and transmitted on the sending side, The receiver can be activated, and the region code is assigned to each prefecture. In the case of a fixed receiver, once the area code is set at the time of installation of the receiver, it is not necessary to change the setting until moving, but in the case of a moving car, the area code of the receiver is set according to the location of the own vehicle. If you do not set it appropriately, you will not be able to get information where you need it when you need it. In addition, since the stations that can be received change as the vehicle moves, the vehicle position data obtained from the navigation system 12 is acquired at any time, the receivable channel is set according to the current position, and the area code for emergency alert broadcasting is updated. Just do it. Information (table) for this purpose may be stored in the memory 16.
[0035]
In addition, when broadcasting emergency warning broadcasts, if all emergency warning broadcasts issued for each prefecture that pass to the destination entered in the navigation among the transmitted regional codes are targeted for receiver activation (regional The simultaneous setting of multiple codes), the situation of the destination local area can be grasped at an early stage, and it is possible to respond quickly to route changes and destination changes.
[0036]
A state in which it is estimated that there is a person in the vehicle in a non-running state (engine driving state, door unlocked state even when the engine is not driven, key inserted into the key switch 27, sound device ON state In a case where a person is detected by the sensor, or in a case where it is estimated that a person is present by a combination of these, etc., the digital broadcast receiver 5 is energized while the switch 29 is in an ON state under the control of the system controller 17. When the emergency alert broadcast detection unit receives the emergency alert broadcast, the system controller 17 (the audio / video device other than the TV is selected / viewed or nothing is viewed) If the switch 28 is turned off, the switch 28 is turned on), so that the video / audio received by the digital broadcast receiver 5 is output. The selector / mixer 19 is controlled so that the audio is amplified to a constant level by the audio amplifier 20 regardless of the volume setting level of the operation unit 15 and output at a constant volume from the speaker. It is displayed on the display unit 24. When the key switch 27 is in the Acc state and the car navigation system 12 is operating, the system controller 17 stores the position information from the car navigation system 12 and the memory 16 or the map information storage medium / reader 9 medium. Based on the stored broadcast station related information (broadcast station service area area data and channel information), the channel that is sending the emergency alert broadcast that can be received in the area where the car is located is determined, and this channel is selected. The tuner 2 may be controlled to station.
[0037]
A state in which there is no person in the vehicle in a non-running state (a state in which the key is removed from the key switch 27, a door is locked, or a person is not detected by the sensor, it is estimated that there is no person in combination. In this case, the switches 28 and 30 are turned off by the control of the system controller 17 to stop the power supply to the video / audio reproduction device system and the navigation system 12, but the switch 29 remains on for a certain time. During this time, power is supplied to the power supply line 32, and the digital broadcast receiving apparatus 5 is in a reception standby state by selecting the emergency alarm broadcast transmission channel in the area (the AV decoder 5 is set to be unpowered). May be) When an emergency warning broadcast is broadcast during the standby holding period, the data demodulated by the tuner 2 is stored in the memory 16 by selecting a necessary layer portion by the demultiplexer 3. When an emergency broadcast is broadcast while the driver leaves the car, the driver returns to the car to unlock the door, detects that a key is inserted into the key switch 27, or the key switch When 27 is at the Acc position, a warning sound is sounded or the driver is alerted by the voice synthesis that there is an emergency warning broadcast. At the same time, the emergency warning broadcast video recorded and held in the memory 16 The audio data is read out and sent to the AV decoder 4 to generate a video / audio signal. The AV selector / mixer 19 selects and outputs the video / audio. Thus, even if the emergency warning broadcast is broadcast for a while after the driver leaves the car, the broadcast content can be immediately viewed when the driver returns to the car.
[0038]
When the waiting time has passed before the driver returns to the car, the system controller 17 turns off the switch 29 and releases the standby state for the emergency warning broadcast. Further, when the voltage monitoring unit 14 detects a voltage drop (decrease in the remaining amount) of the battery 25 by the end of standby reception, the system controller 17 turns off the switch 29, so that the battery is prevented from running out.
[0039]
In the above example, video / audio or the like is recorded in the memory 16, but video / audio or the like may be recorded on a hard disk or the like having a large capacity.
[0040]
【The invention's effect】
As described above, according to the present invention, it is possible to eliminate as much as possible a situation where the driver misses or misses the emergency warning broadcast.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an in-vehicle audiovisual apparatus equipped with a digital broadcast receiver capable of receiving an emergency warning broadcast according to the present invention.
[Explanation of symbols]
5 Digital Broadcasting Receiver 12 Navigation System 15 Operation Unit 16 Memory 17 System Controller 19 AV Selector / Mixer 25 Battery 27 Ignition Key Switch

Claims (8)

A vehicle-mounted broadcast receiving apparatus having broadcast receiving means for receiving a broadcast wave and storage means for storing the received broadcast, and determining means for determining whether or not a vehicle equipped with the vehicle-mounted broadcast receiving apparatus is running; In the case where an emergency warning broadcast is received by the broadcast receiving means when the judgment means determines that the vehicle is running, the storage and reproduction is performed to store the received emergency warning broadcast in the storage means A vehicle-mounted broadcast receiving apparatus comprising: a control unit; 2. The in-vehicle broadcast receiving apparatus according to claim 1, wherein the storage / reproduction control means stores the emergency warning broadcast during the travel and then is determined by the determination means that the travel is not being performed. An in-vehicle broadcast receiving apparatus that plays back an emergency alert broadcast recorded in the storage means. In the in-vehicle broadcast receiver according to claim 1 or 2,
  An estimation means for estimating whether there are people in the vehicle,
  Control means for causing the broadcast receiving means to maintain a reception standby state capable of receiving an emergency warning broadcast even after the determination means determines that the vehicle is not traveling and the estimation means estimates that there is no person in the vehicle; Further comprising
  The vehicle-mounted broadcast receiving apparatus, wherein the storage / reproduction control unit records the emergency alert broadcast in the storage unit when receiving the emergency alert broadcast during the reception standby. The in-vehicle broadcast receiver according to claim 3,
  The in-vehicle broadcast receiving apparatus, wherein the control means cancels the reception standby state when the reception standby state elapses for a predetermined time. In the in-vehicle broadcast receiving apparatus according to claim 3 or 4,
  The storage / reproduction control means stores the emergency warning broadcast while waiting for reception, and when the determination means and the estimation means estimate that there is a person in the vehicle instead of running, An in-vehicle broadcast receiving apparatus for reproducing an emergency alert broadcast recorded in a storage means. 6. The in-vehicle broadcast receiver according to claim 3, further comprising a remaining amount detecting unit that detects a remaining amount of the in-vehicle battery, wherein the control unit receives a remaining amount from the remaining amount detecting unit. The vehicle-mounted broadcast receiving apparatus, wherein the reception standby state is canceled when information indicating that the value is lower than a predetermined value is obtained. The in-vehicle broadcast receiver according to any one of claims 1 to 6, wherein the navigation system, a table in which position information is associated with an area designator for emergency alert broadcasting, and a position obtained from the navigation system An in-vehicle broadcast receiving apparatus comprising: an area designator setting means for setting an area designator for emergency alert broadcasting based on information. 8. The in-vehicle broadcast receiver according to claim 7, wherein the area specifier setting means corresponds to a plurality of areas on a travel route to a destination input to the navigation system, for an emergency warning broadcast. An in-vehicle broadcast receiving apparatus characterized in that a plurality of sets are set.

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