JP4474545B2 - Broadcast receiver for vehicles - Google Patents

Description

  The present invention relates to a broadcast receiver used by being mounted on a vehicle, and more particularly to a vehicle broadcast receiver that receives various contents and its own rewrite program by broadcasting.

  There is known a system in which upgrade data provided by digital broadcasting such as satellite broadcasting or terrestrial broadcasting is received by an on-board terminal mounted on a vehicle and a program on the on-board terminal is updated (Patent Document 1).

JP 2001-53699 A

  In the system disclosed in Patent Document 1, since there is no disclosure about the update timing of the program, the program may be updated even in a situation not desired by the user.

The broadcast receiver for a vehicle according to the invention of claim 1 is a broadcast receiver mounted on a vehicle, and receives various contents and rewrite data for rewriting a program of the broadcast receiver by broadcast waves. Means, output means for outputting various content contents received by the receiving means by image and / or sound, storage means for storing the rewrite data received by the receiving means, content output state or vehicle state Based on the determination means for predicting the future usage status of the content by the user and determining whether to start rewriting the program according to the prediction result, and when determining that the rewriting of the program is started by the determining means and rewriting means for rewriting the program using the rewriting data stored by the storage means, It includes a route setting means for setting both the recommended route, if the length of the recommended route is shorter than the predetermined distance, regardless of the determination result by the determination means, and a rewriting inhibiting means for inhibiting rewriting of the program by rewriting means Is.
According to a second aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the navigation means for outputting a road map for guiding the vehicle to the destination, and switching between the content contents and the road map are output. And an output switching means that, when the output from the output switching means is switched from the content contents to the road map, predicts that the user will not use the contents for a while and starts rewriting the program. Then, it is determined.
According to a third aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the navigation means for outputting a road map for guiding the vehicle to the destination, and switching between the content contents and the road map for output. An output switching unit that determines whether the user will use the content and starts rewriting the program when the output from the output switching unit is switched from the road map to the content. The output switching means outputs the contents after the program is rewritten by the rewriting means.
According to a fourth aspect of the present invention, in the vehicle broadcast receiver according to the first aspect, when the vehicle is traveling in an area where the received electric field strength of the broadcast wave is equal to or less than a predetermined value, It is determined that the program will not be used for a while and program rewriting is started.
According to a fifth aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the vehicle broadcast receiver further includes navigation means for outputting an image of a road map for guiding the vehicle to the destination. When the vehicle is traveling in the area to be operated, the user predicts that the content will not be used for a while and determines to start rewriting the program.
According to a sixth aspect of the present invention, in the vehicular broadcast receiver according to the fifth aspect, the area in which the driver watches the road map is a predetermined distance from the guidance intersection set on the recommended route from the current position to the destination. It is supposed to be an area within.
According to a seventh aspect of the present invention, in the vehicle broadcast receiver according to the first aspect, the determining means predicts that the user will not use the content for a while after the engine starts based on the operating state of the engine of the vehicle. Thus, it is determined that the program rewriting is started.
According to an eighth aspect of the present invention, in the vehicle broadcast receiver according to the first aspect, the determining means predicts that the user will not use the content for a while immediately after the engine is stopped based on the operating state of the engine of the vehicle. Thus, it is determined that the program rewriting is started.
According to a ninth aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the determination means determines that the user does not use the content for a while when the parking brake is turned on based on the operating state of the parking brake of the vehicle. Predicting and determining to start rewriting the program.

According to the present invention, based on the output state of the content or the state of the vehicle, the future usage status of the content by the user is predicted, and it is determined whether to start rewriting the program according to the prediction result, When it is determined to start rewriting, the program is rewritten using the rewriting data stored in the storage means. Since it did in this way, it can prevent that a program update is performed even if it is a situation which a user does not want, and a program update can be performed in a suitable situation.

  A configuration of a navigation apparatus according to an embodiment of the present invention is shown in FIG. This navigation device is mounted on a vehicle and displays a road map to guide a user to a set destination. Furthermore, by receiving terrestrial digital broadcasting, it is possible to allow a user to view a TV program or rewrite a part of firmware that is a program for its own operation. A navigation device 1 shown in FIG. 1 includes a control circuit 11, a ROM 12, a RAM 13, a current location detection device 14, an image memory 15, a display monitor 16, a speaker 17, an input device 18, a digital broadcast reception unit 19, a data storage unit 20, and a disk drive. 21. An antenna 22 is connected to the digital broadcast receiver 19. The disc drive 21 is loaded with a DVD-ROM 23 in which map data is recorded.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various processes and controls as will be described later by executing a control program stored in the ROM 12 using the RAM 13 as a work area. The current location detection device 14 is a device that detects the current location of the host vehicle. For example, a vibration gyro 14a that detects the traveling direction of the host vehicle, a vehicle speed sensor 14b that detects a vehicle speed, and a GPS sensor that detects a GPS signal from a GPS satellite. 14c and the like. The navigation main body 1 can determine a route search start point to be described later based on the current location of the host vehicle detected by the current location detection device 14.

  The image memory 15 temporarily stores image data to be displayed on the display monitor 16. The image data includes road map drawing data for displaying a road map, various graphic data, and the like, and is created in the control circuit 11 based on the map data recorded on the DVD-ROM 23. When the image data created by the control circuit 11 is output to the image memory 15, a road map is displayed on the display monitor 16, and various road traffic information is displayed on the road map.

  The display monitor 16 is a video display using, for example, a liquid crystal display, and displays the road map and road traffic information. Furthermore, a TV image can be displayed by inputting a TV (television) image signal output from the digital broadcast receiving unit 19 as described later through the control circuit 11. In the following description, a screen when displaying a road map and road traffic information is referred to as a navigation screen, and a screen when displaying a TV video is referred to as a TV screen. The user can switch the screen displayed on the display monitor 16 by operating the input device 17, and can display either the navigation screen or the TV screen on the display monitor 16.

  The speaker 17 is a speaker for voice output, and outputs various guidance voices for guiding the user to a set destination, for example, voices for instructing the user to turn left or right. Also, the TV sound can be output by inputting the TV sound output from the digital broadcast receiving unit 19 through the control circuit 11 as described later. Note that the sound output from the speaker 17 and the screen displayed on the display monitor 16 do not necessarily have to be linked. For example, TV sound may be output from the speaker 17 when a navigation screen is displayed on the display monitor 16.

  The input device 18 allows the user to set the destination and waypoint of the vehicle (hereinafter simply referred to as the destination) and to switch between the navigation screen displayed on the display monitor 16 and the TV screen. Has an input switch. The input device 18 is realized by an operation panel, a remote controller, or the like. The user can set a destination by designating a place name, a position on a map, and the like by operating the input device 18 in accordance with a screen instruction displayed on the display monitor 16. When the TV screen is displayed on the display monitor 16, it is possible to instruct the digital broadcast receiver 19 to switch the reception frequency by operating the input device 18. Thereby, the channel of the TV image displayed on the TV screen can be switched.

  The digital broadcast receiver 19 receives a terrestrial digital broadcast broadcast by a broadcast station (not shown) via the antenna 22. The term “terrestrial digital broadcasting” as used herein refers to a digital terrestrial TV broadcasting service that has recently started to be provided in some areas in Japan. In this terrestrial digital broadcasting, unlike the conventional analog TV broadcasting service, TV video and TV audio are broadcast as digital data. Further, in terrestrial digital broadcasting, various other data are broadcast in addition to these TV video data and TV audio data. For example, data scheduled to be broadcast for a television program is broadcast. In the following description, data other than these TV video data and TV audio data is referred to as additional data. As this additional data, rewrite data (hereinafter simply referred to as rewrite data) used to rewrite and upgrade the firmware of the digital broadcast receiving unit 19 may be broadcast.

  The TV video data received by the digital broadcast receiver 19 is demodulated by the digital broadcast receiver 19 and then output to the display monitor 16 through the control circuit 11 as a TV video signal. As a result, the TV screen is displayed on the display monitor 16. The TV audio data received by the digital broadcast receiver 19 is demodulated by the digital broadcast receiver 19 and then output to the speaker 17 as a TV audio signal via the control circuit 11. Thereby, TV sound is output from the speaker 17.

  On the other hand, the additional data received by the digital broadcast receiving unit 19 is output to the control circuit 11, and then the control unit 11 performs processing according to the data content. Hereinafter, the processing content when the above-described rewrite data is received as additional data will be described. The processing contents when additional data having other contents is received are not related to the present invention, and thus the description thereof is omitted.

  When the rewrite data output from the digital broadcast receiving unit 19 to the control circuit 11 is applicable rewrite data after firmware version verification or model verification is performed in the control circuit 11, the rewrite data is transferred to the data storage unit 20. Is output. The data storage unit 20 is configured using a member that can temporarily store data, such as a memory, and temporarily stores rewrite data output from the data storage unit 20. The rewrite data stored in the data storage unit 20 is read at a rewrite timing as will be described later under the control of the control circuit 11. Using this, the firmware of the digital broadcast receiver 19 is rewritten.

  The disk drive 21 reads map data for displaying a road map on the navigation screen from the loaded DVD-ROM 23. This map data includes route calculation data used for route search, route guidance data used to guide the vehicle to the destination according to recommended routes, such as intersection names and road names, and road data representing roads. include. The map data also includes background data representing map shapes other than roads such as rivers, railways, various facilities on the map (landmarks), and the like.

  In the road data, the minimum unit representing a road section is called a link, and each road is composed of a plurality of links. A point connecting the links is called a node, and each node has position information (coordinate information). The link shape, that is, the shape of the road is determined based on the position information of the node. Although an example using a DVD-ROM is described here, the map data may be read from a recording medium other than the DVD-ROM, such as a CD-ROM or a hard disk.

  When the user operates the input device 18 to set the destination, the navigation device 1 uses the current location detected by the current location detection device 14 as a route search start point and calculates a predetermined algorithm based on the above-described route calculation data. By doing so, a route search from the present location to the destination is performed. The recommended route obtained as a result of the route search is displayed on the road map on the navigation screen so as to be distinguished from other roads by changing its display form, for example, display color. Thus, the user can recognize the recommended route on the road map displayed on the display monitor 16. In addition, the navigation device 1 guides the host vehicle by instructing the traveling direction by an image or voice to the user so that the host vehicle can travel according to the recommended route. In this way, route guidance to the destination is performed by displaying the road map and guiding the vehicle to the destination according to the recommended route.

  Here, processing contents when rewrite data is received as additional data will be described. When the rewrite data is received and stored in the data storage unit 20 and a predetermined rewrite start condition described later is satisfied, the control circuit 11 displays a screen as shown in FIG. To do. In the following description, this screen is referred to as a rewrite confirmation screen. By displaying this rewrite confirmation screen, the user is confirmed whether or not the firmware of the digital broadcast receiving unit 19 is to be rewritten.

  When the rewrite start button 31 is pressed by operating the input device 18 on the rewrite confirmation screen in FIG. 2, the rewrite data stored in the data storage unit 20 is read by the control circuit 11 and the firmware of the digital broadcast receiving unit 19 is read. Rewriting is started. On the other hand, when the cancel button 32 is pressed, rewriting of the firmware of the digital broadcast receiving unit 19 is not started. In that case, the rewrite confirmation screen of FIG. 2 is displayed again after the elapse of a predetermined time or when the vehicle engine is turned on again.

  When rewriting of the firmware of the digital broadcast receiving unit 19 is started, a screen as shown in FIG. 3 is displayed on the display monitor 16. In the following description, this screen is referred to as a rewriting screen. While the firmware of the digital broadcast receiver 19 is being rewritten, the digital broadcast receiver 19 cannot be operated, so that the TV screen cannot be displayed on the display monitor 16 and TV sound is not output from the speaker 17. . Therefore, when the rewriting screen as shown in FIG. 3 is displayed, the user can recognize that the firmware of the digital broadcast receiving unit 19 is being rewritten, and during rewriting, the user can switch to the TV screen and output TV sound. You can know that you can not.

  Note that the above-described rewriting screen continues to be displayed while the firmware of the digital broadcast receiving unit 19 is being rewritten. During this time, the operation of the digital broadcast receiver 19 is prohibited, and the screen during rewriting indicates that the output of TV video and TV audio is prohibited. The time required for rewriting at this time varies depending on the data amount of the firmware to be rewritten and the processing capability of the control circuit 11, but can be about several minutes when the data amount of the firmware to be rewritten is about 10 megabytes, for example. .

  When the rewriting of the firmware of the digital broadcast receiving unit 19 is completed, a screen as shown in FIG. 4 is displayed on the display monitor 16. In the following description, this screen is referred to as a rewrite end screen. By displaying this rewriting end screen, the user can recognize that the rewriting of the firmware of the digital broadcast receiving unit 19 has ended, and can know that the prohibition of switching to the TV screen has been lifted. If the TV sound is output from the speaker 17 before the rewriting, the TV sound can be output again when the rewriting end screen is displayed.

Next, the above-described rewrite start condition will be described. The rewriting start condition can be set in advance based on the output state of the TV screen so that rewriting is started in accordance with a situation where the user is assumed not to use the TV for a while from that time. . For example, in the following case, it can be determined that the rewrite start condition is satisfied.
(A) When the display on the display monitor 16 is switched from the TV screen to the navigation screen. (B) When the host vehicle travels in a region where the received electric field strength of terrestrial digital broadcasting is weak and the TV cannot be used for a certain time or longer ( c) When the vehicle is traveling in an area where the user is likely to watch the navigation screen

  In the case of (a) above, it is considered that the user does not use the TV for a while because the user has selected to use the navigation function. Therefore, when (a) is set as a rewrite start condition and this is satisfied, rewriting of the firmware of the digital broadcast receiving unit 19 can be started. Whether or not the rewrite start condition of (a) is satisfied can be determined by the operation state of the input device 18.

  In the case of (b), the TV screen cannot be output while the host vehicle is traveling in the area. Therefore, when (b) is set as the rewrite start condition and this is satisfied, rewriting of the firmware of the digital broadcast receiving unit 19 can be started. Whether or not the rewrite start condition of (b) is satisfied can be determined by previously recording information (reception field strength map) on the reception field strength of the terrestrial digital broadcast for each region in the map data. That is, when the vehicle travels over a certain time in an area where the received electric field strength is not more than a predetermined value in the received electric field strength map, it is determined that the rewriting start condition of (b) is satisfied. Can do.

  A history of received electric field intensity measured at each point in the past may be recorded, and a received electric field intensity map may be obtained from this measurement history. At this time, the received electric field strength can be estimated from the measurement history at the surrounding points for the points having no past measurement history. At this time, the error rate (bit error rate) in the reception data of the terrestrial digital broadcast is measured instead of the received electric field strength, and when the error rate exceeds a predetermined value, the rewrite start condition of (b) is satisfied It is good.

  Or you may judge by the topographical feature of map data. For example, when the host vehicle travels for more than a certain time in an area where the received electric field strength is considered to be relatively low, such as a tunnel, a mountainous area, an urban area, or an underground parking lot, it is determined that the rewriting start condition in (b) is satisfied. can do. Whether or not the vehicle travels in the above-described region for a certain time or more may be determined based on the distance that the set recommended route passes through the region, You may judge from a vehicle running speed.

  In the case of (c), it is considered that the TV is not used for a while because the user watches the navigation screen. Therefore, when (c) is set as the rewrite start condition and this is satisfied, rewriting of the firmware of the digital broadcast receiving unit 19 can be started. Whether or not the rewrite start condition in (c) is satisfied can be determined based on the set recommended route and the vehicle position. For example, when the vehicle is traveling in a guidance intersection or an area within a predetermined distance in front of the destination, it can be determined that the rewrite start condition in (c) is satisfied. Alternatively, it may be determined that the rewriting start condition of (c) is satisfied even when the vehicle is traveling in a region where a road is complicated such as an urban area.

Alternatively, it is considered that the TV is not used for a while before or after the start of traveling of the host vehicle, and therefore the rewrite start condition may be set according to this. For example, in the following case, it can be determined that the rewrite start condition is satisfied.
(D) Immediately after starting the engine of the own vehicle (e) Immediately after stopping the engine of the own vehicle (f) When the parking brake is turned on

  In the case of (d) above, it can be determined that the vehicle has started running, and in the case of (e), it can be determined that the vehicle has been driven. Therefore, these are set as rewrite start conditions, and rewriting of the firmware of the digital broadcast receiver 19 is started. be able to. Whether or not the rewrite start condition (d) or (e) is satisfied can be determined by turning on / off the ACC power supply supplied to the navigation device 1. In the case of (e), the power of the navigation device 1 is turned on after the engine is stopped until the rewriting is finished, and the power is turned off after the rewriting is finished. preferable.

  In the case of (f), it is assumed that the user temporarily leaves the driver's seat with the engine turned on, so this is set as a rewrite start condition, and the firmware of the digital broadcast receiver 19 is rewritten. Can start. Whether or not the rewrite start condition of (f) is satisfied can be determined by a parking brake signal input from the host vehicle.

  The determination as to whether or not the rewrite start conditions described in (e) and (f) above are satisfied may be made when the host vehicle reaches the destination of the set recommended route. In this way, it is possible to prevent rewriting from starting when the host vehicle stops on the recommended route before reaching the destination.

Alternatively, before the user uses the TV, rewriting of the firmware of the digital broadcast receiving unit 19 may be started. For example, in the following case, it can be determined that the rewrite start condition is satisfied.
(G) When the display on the display monitor 16 is switched from the navigation screen to the TV screen.

  Whether or not the rewrite start condition (g) is satisfied can be determined by the operation state of the input device 18. In this case, it is preferable not to switch to the TV screen during rewriting, but to switch to the TV screen after rewriting. When the rewrite start conditions such as (a) to (g) described above are set in advance and any one of them is satisfied, rewriting of the firmware of the digital broadcast receiving unit 19 can be started.

  FIG. 5 shows a flowchart when the processing contents described above are executed in the control circuit 11. This flowchart is executed at predetermined intervals. For example, it is executed when a predetermined time elapses or when the vehicle engine is turned on. In step S <b> 1, it is determined whether rewrite data is received and stored in the data storage unit 20. If the received rewrite data is stored in the data storage unit 20, the process proceeds to step S2. If the rewrite data is not stored, the processing flow of FIG. 5 ends.

  In step S2, it is determined whether a preset rewrite start condition as described above is satisfied. If the rewrite start condition is satisfied, the process proceeds to the next step S3. If the rewrite start condition is not satisfied, step S2 is repeated until it is determined that the rewrite start condition is satisfied. In step S3, the rewrite confirmation screen of FIG.

  In step S4, it is determined whether or not the user has instructed to start rewriting on the rewriting confirmation screen displayed in step S3. This determination is made depending on which of the rewrite start button 31 and the cancel button 32 in FIG. 2 is pressed. When the rewrite start button 31 is pressed, it is determined that the start of rewriting is instructed, and the process proceeds to the next step S5. On the other hand, when the cancel button 32 is pressed, it is determined that the start of rewriting has not been instructed, and the processing flow of FIG. In step S5, the rewriting screen shown in FIG.

  In step S6, the firmware of the digital broadcast receiver 19 is rewritten. In the next step S7, it is determined whether or not the rewriting in step S6 has been completed normally. This determination can be made, for example, by collating the contents of the firmware after rewriting of the digital broadcast receiving unit 19 with the contents of the rewritten data stored in the data storage unit 20. In this case, if the collation results of both match, it is determined that the rewriting has been completed normally, and the process proceeds to the next step S8. If the collation results of both do not match, the rewriting has not been completed successfully. Determine and return to step S2. Note that it may be determined whether the rewriting has been normally completed by a method other than this.

  In step S8, the rewrite end screen of FIG. In addition, after displaying the rewriting end screen, either the TV screen or the navigation screen may be displayed. After step S8 is executed, the processing flow of FIG. 5 is terminated. At this time, the rewrite data stored in the data storage unit 20 may be erased. As described above, the firmware of the digital broadcast receiver 19 is rewritten using the received rewrite data.

According to the embodiment described above, the following operational effects can be obtained.
(1) It is determined whether or not a preset rewrite start condition is satisfied (step S2). When it is determined that the rewrite start condition is satisfied, digital broadcast reception is performed using the rewrite data stored in the data storage unit 20. The firmware of the unit 19 is rewritten (step S6). Since it did in this way, it can prevent rewriting of firmware even if it is a situation which a user does not want, and can perform rewriting of firmware in a suitable situation.

(2) The rewrite start condition is set based on the output state of the TV screen, and in any of the cases (a) to (c) or (g), it is determined that the rewrite start condition is satisfied. It was. In addition, the rewrite start condition is set based on the state of the vehicle, and in any of the cases (d) to (f), it is determined that the rewrite start condition is satisfied. Since it did in this way, rewriting start conditions can be set so that rewriting may be started according to the situation where a user is considered not to use TV for a while from that time.

(3) Before rewriting the firmware of the digital broadcast receiver 19, a rewrite confirmation screen for confirming whether or not to rewrite is displayed (step S3), and when rewriting is instructed on this rewrite confirmation screen Then, it is decided to start rewriting the firmware of the digital broadcast receiver 19 (step S4). Since it did in this way, rewriting of firmware can be performed in a more suitable situation according to a user's selection.

(4) When the firmware of the digital broadcast receiving unit 19 is being rewritten, the operation of the digital broadcast receiving unit 19 is prohibited and a rewriting screen indicating that output of TV video and TV audio is prohibited is displayed. (Step S5). Since it did in this way, it can notify a user that switching to a TV screen or output of TV sound cannot be performed during rewriting.

  In the above embodiment, an example in which terrestrial digital broadcasting is received and TV video and TV audio are output has been described. However, the present invention is not limited to this. For example, a digital broadcast from a satellite may be received, or a radio broadcast may be received to output only sound. As long as various contents such as TV programs and radio programs and rewrite data are received by broadcasting, the contents are output as images and sound, and the own firmware is rewritten using rewrite data. Included within the scope of the invention.

  In the above embodiment, when the rewriting start condition is satisfied, a rewriting screen as shown in FIG. 2 is displayed, and when the user instructs rewriting on the rewriting screen, the digital broadcast receiving unit 19 It was supposed to start rewriting firmware. However, rewriting may be started without displaying the rewriting screen. In that case, if it is determined in step S2 of FIG. 5 that the rewrite start condition is satisfied, the process of steps S3 and S4 may be performed without proceeding to step S5.

  Furthermore, in the above embodiment, during rewriting the firmware of the digital broadcast receiving unit 19, a rewriting screen as shown in FIG. 3 is displayed and switching to the TV screen is prohibited. However, when the user instructs to switch to the TV screen by operating the input device 18, the rewriting of the firmware may be stopped and the screen may be switched to the TV screen. In this case, as in the case where the cancel button 32 is pressed on the rewrite confirmation screen of FIG. 2, the rewrite confirmation screen is displayed again after a predetermined time has elapsed or when the vehicle engine is turned on again. It is preferable to prompt the user to rewrite.

  In the above embodiment, rewriting of the firmware of the digital broadcast receiving unit 19 is started when any of the rewriting start conditions (a) to (g) is satisfied. However, if a recommended route to the destination is set and the length is shorter than a predetermined distance, the required time to the destination may be short and the rewriting time may not be ensured. Therefore, in such a case, even when any of the rewrite start conditions (a) to (g) is satisfied, the rewrite start may be prohibited.

  In the above embodiment, an example is described in which the navigation device performs a route search based on map data recorded on a storage medium such as a DVD-ROM and guides the host vehicle according to the recommended route searched. The present invention is not limited to this content. For example, the present invention can be applied to a communication navigation apparatus that downloads map data from an information distribution center using wireless communication using a mobile phone or the like.

  In the above embodiment, for example, the receiving means is realized by the digital broadcast receiving section 19, the output means is realized by the display monitor 16 and the speaker 17, the storage means is realized by the data storage section 20, the judging means and the rewriting means are realized by the control circuit 11, respectively. The example which implement | achieves the 1st and 2nd display means by the display monitor 16 was demonstrated. However, the present invention is not limited to these contents. The present invention is not limited to the above-described embodiment, and other modes conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

It is a block diagram which shows the structure of the navigation apparatus by one Embodiment of this invention. It is a figure which shows the example of the rewriting confirmation screen displayed when rewriting start conditions are satisfy | filled. It is a figure which shows the example of the screen during rewriting displayed when rewriting is started. It is a figure which shows the example of the rewriting completion screen displayed when rewriting is complete | finished. It is a flowchart of the process performed when rewriting of the firmware of a digital broadcast receiving part is performed using rewriting data.

Explanation of symbols

1 Navigation body 11 Control circuit 12 ROM
13 RAM
DESCRIPTION OF SYMBOLS 14 Present location detection apparatus 15 Image memory 16 Display monitor 17 Speaker 18 Input apparatus 19 Digital broadcast receiving part 20 Data storage part 21 Disk drive 22 Antenna 23 DVD-ROM

Claims (9)

A broadcast receiver mounted on a vehicle,
Receiving means for receiving various contents and rewrite data for rewriting the program of the broadcast receiver itself by broadcast waves;
Output means for outputting various contents received by the receiving means by image and / or sound;
Storage means for storing rewrite data received by the receiving means;
Based on the output state of the content or the state of the vehicle, a determination unit that predicts whether the user will use the content in the future, and determines whether to start rewriting the program according to the prediction result;
A rewriting unit that rewrites the program using rewrite data stored by the storage unit when the determination unit determines to start rewriting the program ;
Route setting means for setting a recommended route of the vehicle;
Vehicle broadcasting , comprising: a rewrite prohibiting unit that prohibits rewriting of the program by the rewriting unit regardless of a determination result by the determining unit when the length of the recommended route is shorter than a predetermined distance. Receiving machine. The vehicle broadcast receiver according to claim 1,
Navigation means for outputting an image of a road map for guiding the vehicle to a destination;
An output switching means for switching and outputting either the content content or the road map;
When the output from the output switching unit is switched from the content content to the road map, the determination unit determines that the user will not use the content for a while and starts rewriting the program. A broadcast receiver for a vehicle. The vehicle broadcast receiver according to claim 1,
Navigation means for outputting an image of a road map for guiding the vehicle to a destination;
An output switching means for switching and outputting either the content content or the road map;
The determination means determines that when the output from the output switching means is switched from the road map to the content content, the user predicts that the content will be used from now on, and starts rewriting the program,
The vehicle broadcast receiver characterized in that the output switching means outputs the content contents after the program is rewritten by the rewriting means. The vehicle broadcast receiver according to claim 1,
The determination means predicts that the user will not use the content for a while in the future when the vehicle is traveling in an area where the reception electric field strength of the broadcast wave is a predetermined value or less, and rewrites the program. A broadcast receiver for a vehicle characterized in that it is determined to start. The vehicle broadcast receiver according to claim 1,
Navigation means for outputting an image of a road map for guiding the vehicle to a destination;
The determination unit determines that the user predicts that the user will not use the content for a while in the future and starts rewriting the program when the vehicle is traveling in an area where the driver is watching the road map. The broadcast receiver for vehicles characterized by the above-mentioned. In the broadcast receiver for vehicles of Claim 5,
The vehicle broadcast receiver characterized in that the area where the driver watches the road map is an area within a predetermined distance in front of the guidance intersection set on the recommended route from the current position to the destination. The vehicle broadcast receiver according to claim 1,
The determination means determines, based on the operating state of the engine of the vehicle, immediately after the engine is started, that the user predicts that the content will not be used for a while and starts rewriting the program. The broadcast receiver for vehicles characterized. The vehicle broadcast receiver according to claim 1,
The determination means determines, based on an operating state of the engine of the vehicle, that the user predicts that the user will not use the content for a while after the engine is stopped and starts rewriting the program. The broadcast receiver for vehicles characterized. The vehicle broadcast receiver according to claim 1,
The determination means determines that when the parking brake is turned on, the user predicts that the user will not use the content for a while and starts rewriting the program based on an operating state of a parking brake of the vehicle. The broadcast receiver for vehicles characterized by the above-mentioned.

Images