JP4377732B2 - In-vehicle broadcast receiver - Google Patents

Description

  The present invention is an in-vehicle device capable of outputting, to an output device such as a monitor, a region-designated broadcast such as a mobile broadcast that designates a region through which the remaining route ahead of the current location on the guide route searched for by the navigation unit passes to the destination side The present invention relates to a broadcast receiving apparatus.

  Generally, an in-car car navigation device has a function of searching for a guide route connecting a departure place and a destination on a map road and displaying them on a monitor or the like when a departure place and a destination are input.

  In addition, this type of car navigation system is equipped with a GPS (Global Positioning System Global Positioning System) receiver, which constantly detects the current location of the own vehicle (own vehicle), with the current location as the center. Information on intersections, landmarks, and the like necessary for traveling on the predetermined guidance route is displayed as navigation information on a monitor or the like, or a required voice guide or the like is output.

  By the way, in recent years, as one of systems for providing traffic information such as traffic jams, traffic regulations, and traffic accidents using this type of car navigation device, VICS provides such traffic information via FM multiplex broadcasting. (Vehicle Information System and Communication System) and its receiving device have been proposed.

As an example of this type of broadcast receiving apparatus, a traffic information display apparatus has been proposed that displays on a display means traffic information of the prefecture where the vehicle is currently traveling from the prefecture where it is currently traveling (see, for example, Patent Document 1). ).
Japanese Patent Laid-Open No. 10-4366

  However, in such a conventional traffic information display device, since the vehicle can only receive traffic information of the next scheduled prefecture from the prefecture where the vehicle is currently traveling, for example, an area farther away than the neighboring prefecture, In other words, emergency information or warnings such as heavy rains, strong winds, floods, typhoons, earthquakes, etc. that specify areas in three prefectures or more, traffic information on traffic accidents or traffic jams that may affect a wide area in three prefectures, etc. An area-specific emergency alert broadcast cannot be received over a wide area.

  This is a very important issue nowadays when the driving range of automobiles is rapidly expanding due to the development of motorization.

  The present invention has been made in consideration of such circumstances, and its purpose is broadcasting that designates an area through which the remaining route of the destination side ahead of the current location passes among all the lines of the guidance route searched by the navigation unit. Is to provide an in-vehicle broadcast receiving apparatus capable of receiving video over a wide area and displaying video and outputting audio.

  The present invention has been made paying attention to the fact that an area-specific emergency alert broadcast is included as part of a data broadcast in a mobile broadcast scheduled to be broadcast soon, and is configured as follows. .

The invention according to claim 1 is a navigation unit that searches for a guide route that connects the starting point and the destination on the map road when the starting point and the destination of the vehicle are input, and is read from the navigation unit. A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route, and a remaining route for searching for an area through which the remaining route read from the remaining route calculating means passes. Area search means, a broadcast receiving section that receives a broadcast so that the channel can be selected, an area designation broadcast detection means that detects presence / absence of a broadcast that designates an area during the broadcast received by the broadcast reception section, and this area designation An area-designated broadcast that specifies the area searched by the remaining route area search means is extracted from the area-designated broadcast detected by the broadcast detection means, and is output to the output means. Comprising a specified broadcast extraction means, and the area designation broadcast extraction means, among the broadcast specifying the remaining path area for the region containing the current position of the vehicle to the point of the required distance away traveling on the path An in- vehicle broadcast receiving apparatus comprising a route distance limiting function for outputting to the output means in a limited manner to a region-designated broadcast broadcast on the network .

The invention according to claim 2 is a navigation unit that searches for a guide route that connects the starting point and the destination on the map road when the starting point and the destination of the vehicle are input, and is read from the navigation unit. A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route, and a remaining route for searching for an area through which the remaining route read from the remaining route calculating means passes. Area search means, a broadcast receiving section that receives a broadcast so that the channel can be selected, an area designation broadcast detection means that detects presence / absence of a broadcast that designates an area during the broadcast received by the broadcast reception section, and this area designation An area-designated broadcast that specifies the area searched by the remaining route area search means is extracted from the area-designated broadcast detected by the broadcast detection means, and is output to the output means. A designated broadcast extracting means, wherein the area designated extracting means is expected to arrive by a predetermined scheduled time from a current position of a vehicle traveling on the route in the broadcast designating the remaining route area. An in-vehicle broadcast receiving apparatus characterized by including a scheduled arrival time limiting function for outputting to the output means in a limited manner to an area-designated broadcast broadcast to an area including a point .

The invention according to claim 3 is a navigation unit that searches for a guide route that connects the starting point and the destination on the map road when the starting point and the destination of the vehicle are input, and is read from the navigation unit. A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route, and a remaining route for searching for an area through which the remaining route read from the remaining route calculating means passes. Area search means, a broadcast receiving section that receives a broadcast so that the channel can be selected, an area designation broadcast detection means that detects presence / absence of a broadcast that designates an area during the broadcast received by the broadcast reception section, and this area designation An area-designated broadcast that specifies the area searched by the remaining route area search means is extracted from the area-designated broadcast detected by the broadcast detection means, and is output to the output means. Designated broadcast extraction means, and the area designation extraction means is expected to arrive within a predetermined time from a current position of a vehicle traveling on the route in the broadcast designating the remaining route area. An in-vehicle broadcast receiving apparatus comprising a function for limiting a scheduled arrival time for outputting to the output means in a limited manner to an area-designated broadcast broadcast to an area including a point .

The invention according to claim 4 includes setting means for presetting at least one of a route distance from the current position to a predetermined distance, an estimated arrival time at the required point, or an estimated arrival time. It is an in-vehicle broadcast receiving device given in any 1 paragraph of Claims 1-3 .

According to a fifth aspect of the present invention, the region-designated broadcast is a region-designated emergency alert broadcast, and the region-designated extraction means forcibly outputs the region-designated emergency alert broadcast to the output means, or The in-vehicle broadcast according to any one of claims 1 to 3 , further comprising a forcible output function for forcibly selecting and outputting the broadcast receiving unit in an emergency broadcast designated for a region. It is a receiving device.

According to a sixth aspect of the present invention, the broadcast is a mobile broadcast including a data broadcast, and the output means includes a display device for displaying the contents of the mobile broadcast as a video and an audio output means for outputting as a sound. It is a vehicle-mounted broadcast receiver of any one of Claims 1-5 characterized by the above-mentioned.

  According to the present invention, a broadcast designating an area through which the remaining route on the destination side ahead of the current location passes among all lines of the guidance route searched by the navigation unit is received over a wide area, and video display and audio output are performed. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram mainly showing all the guide routes and the remaining routes searched by the navigation unit of the in-vehicle broadcast receiving apparatus 1 according to an embodiment of the present invention, and FIG. 2 shows the overall configuration of the in-vehicle broadcast receiving apparatus 1. FIG.

  As shown in FIG. 2, the in-vehicle broadcast receiving apparatus 1 includes a digital broadcast receiving unit 2 as an example of a broadcast receiving unit, a car navigation unit 3 as an example of a navigation unit, a memory 4 having ROM and RAM (not shown), and this memory 4. A system controller 5 comprising a CPU (Central Processing Unit) used as a work area and a recording area, etc., and an example of a display device, comprising an LCD (Liquid Crystal Display) 6 equipped with sound output means such as a speaker (not shown). It is mounted on vehicles such as automobiles.

  The digital broadcast receiver 2 includes an antenna 2a that receives satellite digital broadcast waves such as mobile broadcasts, a tuner (not shown), a demultiplexer (DEMUX), and an AV decoder operation unit. The tuner has a function of extracting a signal having a specific frequency from a high-frequency digital modulation signal including video / audio data. In addition, the tuner includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, thereby having a function of demodulating the selected digital modulation signal and outputting a transport stream.

  The demultiplexer has a function of separating the transport stream into a video stream, an audio stream, and a PSI / SI (Program Specific Information / Service Information) of a required image compression method such as MPEG2 (Moving Picture Experts Group 2). The demultiplexer supplies a video stream and an audio stream to the AV decoder, and supplies program information included in the PSI / SI to the system controller 5. Channel selection operation or the like for the digital broadcast receiving unit 2 can be performed using the operation unit.

  The system controller 5 has a channel selection control function for the digital broadcast receiving unit 2. That is, the system controller 5 has a function of reading data necessary for channel selection from the memory 4 and performing processing for sending channel selection data necessary for channel selection to the tuner and other necessary control. 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 the PSI / SI information.

  The car navigation unit 3 receives navigation radio waves wirelessly transmitted to the ground from a plurality of GPS artificial satellites (not shown), and measures the current position (own vehicle position) of the vehicle on which the in-vehicle broadcast receiving device 1 is mounted. Own vehicle position to determine the position on the map by determining the vehicle position from the GPS receiver positioning data and the map data read from the map information storage medium / reading device A route for searching for a guide route on the map road from the current position of the vehicle to the destination input in advance at the time of departure on the map road, and generating navigation information including landmarks necessary for traveling on the guide route The graphic drawing part which displays the image which overlapped the search part and the map and the own vehicle position on LCD6 is provided.

  As the vehicle position detection (positioning) means, a self-contained navigation device that measures the position of the vehicle using inertia or the like may be provided, and these positioning data and a map read from a map information storage body such as a DVD The vehicle position may be calculated from the data. In addition, the car navigation unit 3 may include a voice synthesis unit for voice guidance.

  FIG. 1 shows the entire route of the guidance route 7 searched by the route search unit of the car navigation unit 3, the remaining route 10 from the current location 8 to the destination 9 of the vehicle on the guidance route 7, and the remaining route 10. To the point Pa reached when traveling the required distance from the current location 8, to the point Pb reached when traveling to the destination 9 and other required locations until the scheduled time, toward the destination 9 and other required locations A point Pc that is reached when the vehicle travels to a predetermined required time. In FIG. 1, for convenience of illustration, a case where these three points Pa to Pc are the same point is illustrated, but they may be different from each other.

  The estimated arrival time and estimated arrival time are calculated by the system controller 5 based on the data of the traveling speed of the host vehicle and the distance of the remaining route 10. The traveling speed of the own vehicle is obtained by reading from the speedometer of the automobile.

  The memory 4 stores map information recorded on a recording medium such as a DVD (Digital Versatile Disc), while the system controller 5 includes a remaining route calculation unit 5a, a remaining route region search unit 5b, and a region designation broadcast. A processing program that functions as the detection means 5c and the area designation broadcast extraction means 5d is installed.

FIG. 3 shows a flowchart when the system controller 5 functions as the remaining route calculation means 5a and the remaining route area search means 5b. In the figure, reference numerals S1 to S4 denote steps of the flowchart.

  That is, when the remaining route display mode is selected by the user via an operation unit (not shown), first, the remaining route calculation means 5a of the system controller 5 reads all lines of the guide route 7 from the navigation unit 3 in S1.

  In the next S2, the remaining route 10 is calculated from the read guide route 7, and navigation information including landmarks and the like necessary for traveling on the remaining route 10 is extracted.

  That is, the remaining route calculation means 5a receives the route distance from the current location of the host vehicle to a point that is a required distance away from the current location, a point that is expected to arrive from the current location by a predetermined scheduled time, and the current location within a predetermined required time. It is read whether or not any of the planned points is selected by the user's manual operation on the operation unit, and the remaining routes to the required points Pa, Pb, and Pc that meet these conditions are calculated.

  Next, in S3, the system controller 5 acts as the remaining route area searching means 5b, reads the map information of the area through which the remaining route 10 calculated in S2 passes from the memory 4, and the area through which this remaining route 10 passes, for example, In FIG. 1, the areas A and B are searched, and in the next S4, the area and code data table stored in advance in the memory 4 is looked up to obtain the area codes of the areas A and B. Store it in.

  Moreover, the system controller 5 functions as the area designation broadcast detection means 5c and the area designation broadcast extraction means 5d by executing the processing program shown in the flowchart of FIG. In FIG. 4, reference numerals S11 to S17 denote steps in this flowchart.

  That is, first, in S11, the system controller 5 reads all received contents of, for example, mobile broadcast received by the digital broadcast receiver 2, from the digital broadcast receiver 2, and temporarily stores them in a buffer.

  Mobile broadcasting broadcasts contents including data services such as multi-channel audio broadcasting, sports entertainment videos, news and weather forecasts, emergency warning broadcasting (EWS), etc. from artificial satellites or the like by digital broadcast waves. The emergency warning broadcast has additional information that forcibly activates the digital broadcast receiving unit 2 at the time of reception, and this additional information records the urgency of the emergency broadcast program, the target area, and the program number. A channel selection operation is performed based on the information.

  Thereafter, in S12, the system controller 5 reads all the received contents received from the buffer as the area designation broadcast detecting means 5c, and in the next S13, it is determined whether there is an emergency information broadcast in the emergency alert broadcast. Analyze and detect by detection means.

  This emergency warning broadcast detection means is composed of a system controller 5 and a demultiplexer. This emergency warning broadcast detection means monitors the activation control bit included in the additional information signal, and when the activation control bit changes from 0 to 1, while the activation control bit is 1, the PMT (Program Map Table) of the receiving channel. Monitor emergency alert descriptors in At this time, if “start_end_flag = 1” and “area_code = area-designated area designation code 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.

  If it is determined in S13 that there is no emergency alert broadcast, the process returns to S11 again, and the steps from S12 are repeated. On the other hand, if it is determined that there is an emergency alert broadcast, the process proceeds to the next S14. In S14, an area designation code is extracted from the emergency alert.

  On the other hand, the region designation code is read from the memory 4 in the next S15. In the next S16, the area designation broadcast detection means 5c compares the area designation code of the remaining route 7 with the area designation code of each received emergency alert to determine whether there is a matching area designation code, If there is no matching area designation code, the process returns to S11 again, and S11 and subsequent steps are repeated. On the other hand, if it is determined that there is a matching area designation code, the process proceeds to S17.

  In S17, the emergency alert broadcast whose area designation code matches is extracted by the area designation broadcast extraction means 5d, outputted to the LCD 6 as the output means and the audio output means, and at least one of video and audio is outputted.

  Therefore, according to this in-vehicle broadcast receiving apparatus 1, the user selects the remaining route display mode by operating the operation unit (not shown), and further, in the remaining route display mode, the route distance point Pa, the estimated arrival time point When either Pb or estimated arrival time point Pc is selected, the remaining route 10 corresponding to the selection is calculated by the remaining route calculating means 5a of the system controller 5.

  Then, the remaining route area searching means 5b searches for the location where the calculated remaining route 10 passes.

  On the other hand, from all the broadcast contents received by the digital broadcast receiving unit 2, it is detected whether or not there is an area-designated broadcast designating the area of the remaining route 10, that is, whether there is an emergency alert broadcast designating the area. In some cases, the emergency warning broadcast designated by the area 5c is extracted by the area designation broadcast extraction means 5d and output to the LCD 6 and the audio output means, displayed on the LCD 6 as a video, and the audio output means. Is output by voice. The output to the output means such as the LCD 6 of the emergency warning broadcast may be preferentially output by forcibly interrupting the output currently being output to the output means, or when the output means is stopped. The emergency warning broadcast may be forcibly output by forcibly driving the output means.

  Therefore, according to this in-vehicle broadcast receiving apparatus 1, not only navigation information around the current location of the vehicle, but also regional designation broadcasts such as emergency warning broadcasts designated for each area through the remaining route 10 ahead of the current location. It can be received and output to the LCD 6.

For this reason, even if the area where the remaining route passes is not limited to multiple areas such as multiple prefectures, such as adjacent prefectures, but more than 3 areas farther than that, The contents of a certain emergency warning broadcast can be output by output means such as the LCD 6.

  In addition, the emergency warning broadcast allows the user to obtain emergency warning information and traffic information such as heavy rain, strong wind, flood, earthquake, traffic accident, traffic regulation, etc. in the area where the remaining route passes.

  Further, since the remaining route 10 can be arbitrarily set as the end point at any one of the route distance point Pa, the estimated arrival time point Pb, and the estimated arrival required time point Pc, the necessary distance from the current location of the own vehicle can be set. It is sufficient for the user to be able to obtain the contents of the emergency alert broadcast that specifies the area that passes by the distance, or the area that is scheduled to arrive from the current location or the estimated time of arrival. It is common not to obtain the contents of emergency warning broadcasts.

  Similarly, after a user arrives at a required point such as a destination, the user generally does not want to obtain the contents of emergency warning broadcasts in the area ahead of the user.

  In this way, emergency warning broadcasts in areas not desired by the user are cut and not output to the output means such as the LCD 6, so that the memory capacity for recording these emergency warning broadcasts can be saved.

The schematic diagram which mainly shows all the lines of the guidance route searched by the navigation part of the vehicle-mounted broadcast receiver which concerns on one Embodiment of this invention, and the remaining route. The block diagram which shows the structure of the vehicle-mounted broadcast receiver which concerns on one Embodiment of this invention. The flowchart which shows the process sequence in case the system controller shown in FIG. 2 functions as a remaining route calculation means and a remaining route area search means. The flowchart which shows the process sequence in case the system controller shown in FIG. 2 functions as a regional designation broadcast detection means and a regional designation broadcast extraction means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle broadcast receiver 2 Digital broadcast receiver 3 Navigation part 4 Memory 5 System controller 5a Remaining route calculation means 5b Remaining route area search means 5c Area designation broadcast detection means 5d Area designation broadcast extraction means 6 LCD
7 Route 10 Remaining route Pa Route distance point Pb Arrival predetermined time point Pc Arrival predetermined time point

Claims (6)

A navigation unit that searches for a guide route that connects the departure point and the destination on the map road when the departure point and the destination of the vehicle are input;
A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route read from the navigation unit;
A remaining route area search means for searching for an area through which the remaining route read from the remaining route calculation means passes;
A broadcast receiver for receiving broadcasts in a selectable manner;
During the broadcast received by the broadcast receiving unit, an area designated broadcast detecting means for detecting the presence or absence of a broadcast designating the area;
From the area-designated broadcast detected by the area-designated broadcast detecting means, the area-designated broadcast extracting means for extracting the area-designated broadcast designating the area searched by the remaining route area searching means, and outputting to the output means;
Comprising
The area-designated broadcast extraction means is limited to the area-designated broadcast broadcasted for the area including the current position of the vehicle traveling on the route to a point a required distance from the broadcast designating the remaining route area. Route distance limiting function to output to the output means,
Vehicle broadcast receiving apparatus characterized in that it comprises. A navigation unit that searches for a guide route that connects the departure point and the destination on the map road when the departure point and the destination of the vehicle are input;
A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route read from the navigation unit;
A remaining route area search means for searching for an area through which the remaining route read from the remaining route calculation means passes;
A broadcast receiver for receiving broadcasts in a selectable manner;
During the broadcast received by the broadcast receiving unit, an area designated broadcast detecting means for detecting the presence or absence of a broadcast designating the area;
From the area-designated broadcast detected by the area-designated broadcast detecting means, the area-designated broadcast extracting means for extracting the area-designated broadcast designating the area searched by the remaining route area searching means, and outputting to the output means;
Comprising
The area designation extracting means is broadcast for areas including the remaining route area designated from the current position of the vehicle traveling on the route to a point scheduled to arrive by a predetermined scheduled time. A function to limit the expected arrival time that is output to the output means limited to the area designation broadcast,
Vehicle broadcast receiving apparatus characterized in that it comprises. A navigation unit that searches for a guide route that connects the departure point and the destination on the map road when the departure point and the destination of the vehicle are input;
A remaining route calculating means for calculating a remaining route from the current position of the vehicle to a required point on the destination side in the entire guide route read from the navigation unit;
A remaining route area search means for searching for an area through which the remaining route read from the remaining route calculation means passes;
A broadcast receiver for receiving broadcasts in a selectable manner;
During the broadcast received by the broadcast receiving unit, an area designated broadcast detecting means for detecting the presence or absence of a broadcast designating the area;
From the area-designated broadcast detected by the area-designated broadcast detecting means, the area-designated broadcast extracting means for extracting the area-designated broadcast designating the area searched by the remaining route area searching means, and outputting to the output means;
Comprising
The area designation extraction means is broadcast for areas including the remaining route area designated from the current position of the vehicle traveling on the route to a point where it is scheduled to arrive within a predetermined required time. A function to limit the estimated time required to output to the output means limited to the area designation broadcast,
Vehicle broadcast receiving apparatus characterized in that it comprises. Setting means for setting in advance at least one of a route distance from the current position to a predetermined distance, an estimated arrival time to the required point, or an estimated arrival time;
The in-vehicle broadcast receiving apparatus according to any one of claims 1 to 3, further comprising: The above regional designated broadcast is a regional designated emergency warning broadcast,
The area designation extracting means forcibly causes the output means to output the area-designated emergency alert broadcast, or forcibly causes the broadcast reception section to select and output the area-designated emergency broadcast. Output function
The in-vehicle broadcast receiving apparatus according to any one of claims 1 to 3, further comprising: The above broadcast is a mobile broadcast including a data broadcast,
The in-vehicle apparatus according to any one of claims 1 to 5, wherein the output means includes a display device that displays the contents of the mobile broadcast as a video and an audio output means that outputs as audio. Broadcast receiving device.

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