JP2006340292A - Vehicle-borne digital broadcasting receiver control units and program for vehicle-borne digital broadcasting receiver control unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a vehicle-borne digital broadcasting receiver to receive/store additional data in an opportunity of running time becoming long. <P>SOLUTION: A vehicle-borne digital-broadcasting receiver control unit controls the vehicle-borne digital-broadcasting receiver, and makes it download additional data such as an upgrade product program from a ground digital TV broadcasting electric-wave during a run of the route, after obtaining a user's permission, when only distance with a sufficient route with the good receiving environment of a ground digital TV broadcasting electric-wave continues on the guidance route to the destination. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle digital broadcast receiver control apparatus that performs control for receiving and storing additional data in a digital broadcast receiver, and a program for the in-vehicle digital broadcast receiver control apparatus.

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

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

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

  For this reason, it is desirable that the in-vehicle digital broadcast receiver can receive additional data even while the vehicle is running. Further, additional data having a large data size such as a new version program takes time to receive all of the data, so it is convenient if it can be received and stored in anticipation of an opportunity to increase the running time.

  The present invention has been made in view of the above points, and it is an object of the present invention to enable an in-vehicle digital broadcast receiver to receive and store additional data in accordance with an opportunity that travel time becomes longer.

  In order to achieve the above object, the present invention as claimed in claim 1 includes: a current position specifying means for specifying a current position; a destination receiving means for receiving an input of a destination; and a current position specified by the current position specifying means. A determination unit that determines that the distance to the destination received by the destination reception unit is longer than a reference distance, and a vehicle between the current position and the destination based on the determination by the determination unit. And a control means for performing processing for receiving and accumulating additional data other than the program content included in the digital broadcast radio wave in the digital broadcast receiver mounted on the vehicle-mounted digital broadcast receiver control device.

  Since it is like this, the in-vehicle digital broadcast receiver control device is based on the long distance from the identified current position to the accepted destination until it reaches the destination from the current position. Since the digital broadcast receiver installed in the vehicle performs processing to receive and store additional data other than program content contained in the digital broadcast radio wave, the in-vehicle digital broadcast receiver is adapted to the opportunity to increase travel time. Additional data can be received and stored.

  According to a second aspect of the present invention, in the in-vehicle digital broadcast receiver control device according to the first aspect, guidance from the current position specified by the current position specifying means to the destination received by the destination receiving means Guiding route specifying means for specifying a route is provided, and the determining means determines that the length of the guiding route specified by the route specifying means from the current position to the destination is longer than a reference distance. It is characterized by.

  In this way, the in-vehicle digital broadcast receiver control device uses the length of the guide route from the current position to the destination as the distance from the identified current position to the received destination. Digital broadcast receivers can receive and store additional data more accurately by capturing opportunities for longer travel times.

  According to a third aspect of the present invention, in the in-vehicle digital broadcast receiver control device according to the second aspect, the reference distance is an amount depending on a traveling speed allocated to a road on the guide route. It is characterized by.

  In this way, by adding the vehicle speed assigned to the road on the guide route to the reference distance, it becomes possible to receive and store additional data with higher accuracy by capturing the opportunity for a longer travel time.

  According to a fourth aspect of the present invention, in the in-vehicle digital broadcast receiver control device according to the first aspect, the guidance from the current position specified by the current position specifying means to the destination received by the destination receiving means. Guidance route specifying means for specifying a route, and good reception area specifying means for specifying an area where the reception intensity of the digital broadcast radio wave is good (hereinafter referred to as a good reception area), and the determination means includes the current position From the guide route specified by the route specifying means to the destination, it is determined that the distance of the portion corresponding to the good reception area specified by the good reception area specifying means is longer than a reference distance, The control means performs processing for receiving and storing the additional data in the digital broadcast receiver in the portion based on the determination of the determination means. And wherein the door.

  In this way, the in-vehicle digital broadcast receiver control device corresponds to a good reception area on the guide route from the current position to the destination as the distance from the identified current position to the received destination. Since the length of the portion is used, the in-vehicle digital broadcast receiver can receive and store additional data with higher accuracy by capturing the opportunity for a longer travel time.

  According to a fifth aspect of the present invention, in the in-vehicle digital broadcast receiver control device according to the fourth aspect, the reference distance is an amount depending on a traveling speed assigned to a road on the portion of the guide route. It is characterized by being.

  In this way, by adding the vehicle speed assigned to the road on the part of the guide route to the reference distance, it is possible to capture and receive the additional data with higher accuracy by capturing the opportunity to increase the travel time.

  According to a sixth aspect of the present invention, in the in-vehicle digital broadcast receiver control device according to any one of the first to fifth aspects, the user receives and accumulates additional data based on the determination by the determination means. Inquiring means that accepts a reply input from the user in response to the inquiry, and the control means is that the reply input accepted by the inquiring means is that additional data can be received and stored. On the basis of this, a process for receiving and storing additional data other than the program content in the digital broadcast receiver is performed from the current position to the destination.

  In this way, the in-vehicle digital broadcast receiver control device does not download additional data during traveling against the user's intention.

  The invention according to claim 7 is a current position specifying means for specifying a current position, a destination receiving means for receiving an input of a destination, and the destination receiving means receives from a current position specified by the current position specifying means. Determining means for determining that the distance to the destination is longer than a reference distance, and digital broadcasting mounted on the vehicle between the current position and the destination based on the determination by the determining means A program that causes a computer to function as a control unit that performs processing for receiving and storing additional data other than program content included in a digital broadcast radio wave in a receiver.

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

(First embodiment)
Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows an in-vehicle composite system 1 according to this embodiment, an operation unit 2 connected to the in-vehicle composite system 1, a display 3, and a speaker 4. As will be described in detail below, the in-vehicle composite system 1 has received a user's permission when a route having a good reception environment for digital terrestrial TV broadcast waves continues for a sufficient distance on the guide route to the destination. The additional data such as the new version program is downloaded from the terrestrial digital TV broadcast wave (corresponding to reception and storage) while traveling on the route.

  The operation unit 2 includes a touch panel, a mechanical switch, and the like, and outputs a signal corresponding to the operation content to the in-vehicle composite system 1 by receiving a user operation. The display 3 displays a video based on the video signal received from the in-vehicle composite system 1. The speaker 4 outputs sound based on the sound signal received from the in-vehicle composite system 1.

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

  The system control unit 11 includes a normal microcomputer having a CPU, a RAM, a ROM, and the like, and realizes various functions by the CPU executing an operation program recorded in the ROM. Specifically, the system control unit 11 selects one of the digital TV reception unit 12, the audio head unit unit 13, and the car navigation unit 14 based on a signal for switching the system mode from the operation unit 2. The video signal and the audio signal received from the selected target are output to the display 3 and the speaker 4, respectively. Further, the system control unit 11 outputs data based on the signal received from the operation unit 2 to the digital TV reception unit 12, the audio head unit unit 13, and the car navigation unit 14. The system control unit 11 mediates data exchange among the digital TV receiving unit 12, the audio head unit unit 13, and the car navigation unit 14. For example, when data addressed to the digital TV receiving unit 12 is received from the car navigation unit 14, the data is output to the digital TV receiving unit 12. Other functions realized by the system control unit 11 will be described later. Note that the system control unit 11 may be realized as hardware having a circuit configuration that realizes the function (for example, a circuit in which a circuit configuration such as FPGA is programmable).

  The digital TV receiving unit 12 includes a tuner unit 21, a TS (Transport Stream) demodulating unit 22, a video / audio output unit 23, a digital TV reception control unit 24, and a memory unit 25.

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

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

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

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

  The digital TV reception control unit 24 includes a normal microcomputer having a CPU, a RAM, a ROM, and the like, and realizes various functions by the CPU executing an operation program recorded in the ROM. Specifically, the digital TV reception control unit 24 realizes a function such as accumulating additional data received from the TS demodulation unit 22 in the memory unit 25. Note that the system control unit 11 may be realized as hardware having a circuit configuration that realizes the function (for example, a circuit in which a circuit configuration such as FPGA is programmable).

  By having such a configuration, the digital TV receiving unit 12 takes out video data and audio data of program content from radio waves of terrestrial digital TV broadcast received by the antenna 15, and audio signals and audio data based on the video data Is output to the system control unit 11. Further, the digital TV receiving unit 12 downloads additional data such as program guide data, latest version program, broadcast station logo mark, etc. from the radio wave of the terrestrial digital TV broadcast received by the antenna 15.

  When the audio head unit unit 13 receives information from the system control unit 11 that the audio head unit unit 13 is selected by operating the operation unit 2, the audio head unit unit 13 reproduces music by an audio device such as a CD player or an MD player. The audio signal output from the audio device is output to the system control unit 11. Further, when the audio head unit unit 13 receives information from the system control unit 11 that the audio head unit unit 13 is not selected by the operation of the operation unit 2, the audio head unit unit 13 stops reproduction.

  The car navigation unit 14 includes a car navigation control unit 41, a host vehicle position detection unit 42 including a GPS receiver, and a map information storage unit 43.

  The car navigation control unit 41 includes a normal microcomputer having a CPU, a RAM, a ROM, and the like, and realizes various functions by the CPU executing an operation program recorded in the ROM. For example, the car navigation control unit 41 calculates a guidance route to the destination, and causes the display 3 and the speaker 4 to display a map image and a right / left turn guidance voice for route guidance along the calculated guidance route, respectively. Therefore, the data is output to the system control unit 11. The car navigation control unit 41 may be realized as hardware having a circuit configuration that realizes a necessary function (for example, a circuit in which a circuit configuration such as an FPGA is programmable).

  The map information storage unit 43 stores road data including link and node positions and types, connection relation information between nodes and links, facility data including facility positions, names, types, and the like. Has field strength data. The field-specific field strength data is data including data on the strength (goodness / badness of reception state, reception strength value, etc.) of the terrestrial digital TV broadcast radio wave for each region. This intensity may be the electric field intensity of a radio wave from a broadcasting station that mainly broadcasts additional data among terrestrial digital TV broadcast radio waves.

  FIG. 2 is a block diagram showing processing executed by the system control unit 11, the digital TV reception control unit 24, and the car navigation control unit 41 in order to realize the functions of the present embodiment. As shown in this figure, the system control unit 11 implements an inquiry process 111 and a receiver control process 112 by executing a program in its own ROM in addition to the above-described functions. In addition to the above-described functions, the digital TV reception control unit 24 executes a program in its own ROM, thereby realizing a download notification information storage process 241 and a download process 242. In addition, the car navigation control unit 41 executes a program in its own ROM, thereby realizing a guidance route calculation process 411, a vehicle position specifying process 412, an electric field strength reading process 413, and a download determination process 414. The in-vehicle digital broadcast receiver control program 500 shown in FIG. 3 is a flowchart of a program executed by the CPU of the car navigation control unit 41 for executing the download determination process 414. The inquiry program 600 shown in FIG. 4 is a flowchart of a program executed by the CPU of the system control unit 11 for execution of an inquiry process 111.

  Hereinafter, specific contents of the illustrated processes will be described along the operation of the in-vehicle composite system 1. In the following description, the operation of each CPU that executes these processes will be described as the operation of the process itself. In addition, data transfer between a plurality of processes executed by the same CPU is realized through writing and reading of data to and from the RAM.

  First, when an occupant of the vehicle operates the operation unit 2 and inputs a destination name, a position coordinate, and the like, as shown by an arrow A, the guide route calculation process 411 uses the information on the destination as a system control unit. 11, and further receives coordinate information of the current location as indicated by an arrow B from a vehicle position specifying process 412 that repeatedly calculates the vehicle position based on a signal from the vehicle position detection unit 42. Then, the guidance route calculation process 411 reads the road data and facility data in the map information storage unit 43, calculates the optimum (for example, the shortest) guidance route from the current location to the destination, and calculates the calculated guidance route as an arrow. As shown in C, the data is transferred to the download determination process 414. FIG. 5 shows an example of the guide route 60 calculated in this way. The guide route 60 in this example passes through the A city 63, the B city 64, the C city 65, the D city 66, and the E city 67 from the current location 61 to the destination 62.

  The download determination process 414 starts the operation of receiving the guidance route data from the guidance route calculation process 411, accepts the guidance route in step 510 in the execution of the in-vehicle digital broadcast receiver control program 500, and then continues to step 515. Then, it is determined whether the total distance from the current position to the destination along the guidance route is greater than or equal to the reference distance. If the distance is equal to or greater than the reference distance (for example, a constant value of 150 kilometers), then Step 520 is executed, and if it is less than the reference distance, the operation is terminated.

  In step 520, it is determined whether there is additional data to be downloaded. Specifically, as shown by an arrow D, data for inquiring whether there is additional data to be downloaded is output to the download notification information storage process 241 of the digital TV reception control unit 24 via the system control unit 11, and the response is sent. wait.

  The download notification information storage process 241 that receives this inquiry data constantly repeats the acquisition additional data list based on the download notification information that specifies additional data that can be downloaded from the additional data sent from the TS demodulator 22. Created / updated. For example, when a new program for the digital TV reception control unit 24 or logo data of a broadcasting station is recorded in the download notification information, it is added to the acquisition scheduled additional data list. At this time, if a downloadable time or a downloadable channel is specified for specific additional data, the specification is also recorded in the acquisition scheduled additional data list in association with the additional data. Note that the recording destination of the acquisition scheduled additional data list is the memory unit 25. Upon receiving the inquiry data from the download determination process 414, the download notification information storage process 241 uses the contents of the current acquisition-scheduled additional data list as response data, as indicated by an arrow E, via the system control unit 11 as a guide route. Output to the calculation process 411.

  When the download determination process 414 waiting for a response in step 520 receives such response data from the download notification information storage process 241, predetermined data (eg, program guide data, new version program data) is included in the response data. If there is any additional data to be downloaded, step 525 is subsequently executed. If not, the operation is terminated. The predetermined data may be data of a type whose data size is known to be large, may be data having a data size larger than a predetermined amount, or may not be extracted together with program content. It may be the data.

  In step 525, the guide route accepted in step 510 is compared with information on the electric field strength on the route. Specifically, as indicated by an arrow F, data requesting the field strength information on the guidance route is passed to the field strength reading process 413, and a response is awaited.

  Upon receiving the request data from the download determination process 414, the electric field intensity reading process 413 reads out the electric field intensity information on the guidance route from the electric field intensity data for each area in the map information storage unit 43, and returns the read result as a response. As data, as indicated by the arrow G, it is passed to the download determination process 414.

  Upon receiving such response data from the electric field strength reading processing 413, the download determination processing 414 waiting for a response in step 525 specifies the electric field strength for each position on the guide route based on the response data. To do. For example, the response data may indicate that reception in City A 63 is poor reception, City B 64 is good reception, City C 65 is reception poor, City D 66 is good reception, and City E 67 is good reception. For example, in the guidance route, a partial section from entering B city 64 to exiting (hereinafter referred to as partial section α), and a partial section from entering D city 66 to arrival at destination 62 (hereinafter referred to as partial section) (referred to as β) is a portion with good reception.

  Subsequently, in step 530, it is determined whether or not there is a portion that takes more than the reference time for passage among the continuous portions identified in step 525 (that is, the radio wave condition is good). The passing speed used for this determination may be a past average traveling speed of the host vehicle, a traveling speed determined in advance for each road type (for example, an expressway, a general road), or the road data. If the traveling speed for each road (for example, average speed, speed limit) is recorded, the traveling speed may be used.

  For example, let us consider a case where a travel speed predetermined for each road type is used. Here, the reference time is 1 hour, the speed for a general road is 30 km / h, and the speed for a toll road is 80 km / h. The partial section α is assumed to be a general road and the total distance is 15 kilometers. Further, the partial section β is composed of a general road 10 km, a toll road 80 km, and the total distance is 90 km. In this case, since the time taken for the passage of the partial section α is 30 minutes and the time taken for the passage of the partial section β is 1 hour 20 minutes, the partial section β takes more than the reference time for the passage.

  Note that the comparison of whether or not the travel time based on the travel speed assigned to the partial section on the route in step 530 is equal to or longer than the reference travel time is substantially the travel assigned to the partial section. The distance at which the time taken when traveling in the partial section at speed is equal to the reference time is defined as a reference distance (a value different from that in step 515), and the reference distance is the distance of the total stroke of the partial section. It is equivalent to the comparison of whether or not it is less than.

  If there is something that takes more than the reference time to pass, step 535 is subsequently executed, otherwise the operation is terminated.

  Subsequently, in step 535, it is determined whether or not there are a plurality of partial sections that meet the conditions of step 530, that is, a partial section that requires more than a reference time for passage in the guidance route. If there is only one, it is set as a selected partial section, and then step 545 is executed. In step 540, the one having the longest transit time among the plurality of partial sections meeting the conditions is set as the selected partial section, and then step 545 is executed.

  In step 545, a reservation inquiry request is made for the selected partial section. That is, as shown by an arrow H, data requesting the passenger to inquire about whether or not to make a download reservation for the selected partial section is output to the inquiry processing 111 and the response Wait until the download permission data is received.

  The inquiry process 111 starts to operate upon receiving reservation inquiry request data or immediately preceding inquiry request data described later from the download determination process 414. First, in step 610 of FIG. 4, the received data is reservation inquiry request data. In step 620, the display 3 is displayed for reservation inquiry as shown by an arrow I, and a response to the display is displayed on the operation unit 2 in step 620. Wait until it is done.

  FIG. 6 shows an example 70 of a display screen for reservation inquiry. The display screen 70 has a map and an inquiry window 71 superimposed on the map. The inquiry window 71 includes a message indicating the selected section and data to be downloaded and asking whether or not downloading may be performed in the selected section. The display screen 70 includes an affirmative button 72 and a negative button 73 that can be selected by the occupant via the touch panel or mechanical switch of the operation unit 2, and a warning window 74 that includes a message that the digital TV cannot be viewed during downloading. have.

  In response to the selection of the affirmative button 72 or the negative button 73 using the operation unit 2, the inquiry processing 111 subsequently downloads data indicating whether or not download is possible according to the selection, as indicated by an arrow K in step 630. It outputs to 414, and operation | movement is complete | finished after that.

  When the download determination process 414 receives the download permission data from the inquiry process 111, the download determination process 414 subsequently determines in step 550 whether or not the passenger (user) has permitted the download based on the contents of the download permission data. If permitted, step 555 is subsequently executed. If not permitted, the operation is terminated.

  In step 555, as indicated by an arrow L, while receiving the current location data from the own vehicle position specifying process 412, the own vehicle reaches the download start point (the boundary between the C city 65 and the D city 66 in the example of FIG. 5). When waiting and reaching, in step 560, an immediately preceding inquiry request for the selected partial section is made. That is, as shown by an arrow M, data for requesting the passenger to inquire whether the download can be performed from now on is output to the inquiry processing 111 for the selected partial section. End operation.

  When the inquiry processing data 111 receives this immediately preceding inquiry request data, it starts the operation as described above. First, in step 610 of FIG. 4, it is determined that the received data is not reservation inquiry request data, and then in step 640, the arrow As indicated by N, display for the last inquiry is performed on the display 3, and the process waits until a response to the display is made to the operation unit 2.

  FIG. 7 shows an example of a display screen 80 for the last inquiry. The display screen 80 has a map and an inquiry window 81 superimposed on the map. The inquiry window 81 includes a message indicating the download target and asking whether or not the download can be performed now. The display screen 80 includes an affirmative button 82 and a negative button 83 that can be selected by the occupant via the touch panel or mechanical switch of the operation unit 2, and a warning window 84 that includes a message that the digital TV cannot be viewed during the download. have.

  When the selection of the affirmative button 72 or the negative button 73 using the operation unit 2 is received, the inquiry process 111 subsequently determines in step 650 whether or not downloading is permitted based on the selection, and is permitted. If this is not the case, the operation is terminated.

  In step 660, it is determined whether or not a digital TV image is currently displayed on the display 3, that is, whether or not the digital TV receiving unit 12 is selected as the source of the display image on the display 3. If it is displayed, step 670 is subsequently executed, and if it is not displayed, step 680 is subsequently executed. In step 670, the car navigation unit 14 is selected as the source of the image displayed on the display 3, and then step 680 is executed.

  Subsequently, in step 680, as indicated by an arrow P, download request data including designation of a download target is passed to the receiver control process 112, and then the operation is terminated.

  When receiving the download request data from the inquiry process 111, the receiver control process 112 outputs the received data to the download process 242 of the digital TV reception control unit 24 as indicated by an arrow Q.

  Upon receiving the download request data from the receiver control process 112, the download process 242 receives the download target additional data from the TS demodulator 22 based on the designation of the download target included in the download request data, and the memory unit 25. Note that the download process 242 can change the reception channel by controlling the tuner unit 21 when the reception channel needs to be changed in order to download the additional data. When the download of the additional data is completed, the download process 242 indicates that the download has been completed, as indicated by the completion notification window 91 in FIG. To display. As for the download completion display, the download process 242 sends a completion display request to the download determination process 414, and the download determination process 414 displays a download completion display on the display 3 based on the request. You may be allowed to.

  By the operation of each part as described above, the in-vehicle composite system 1 has the total distance along the guide route from the current position to the destination being the reference distance or more (see steps 510 and 515), and the data to be downloaded is Yes (see step 520), and when it takes more than the reference time (or the stroke is more than the reference distance) to travel in a series of well-received portions in the guidance route (steps 525, 530) (See step 545, 620), and inquires of the user whether or not the download reservation is possible (see steps 545 and 620). ) If the user permits (see steps 630 and 550), when the vehicle reaches the download target portion (see 550), the user is inquired of whether to start downloading (see steps 560 and 640). If the user permits (see step 650), the digital TV receiver 12 starts downloading (step 680). , See receiver control process 112). Then, the digital TV receiving unit 12 completes downloading of the additional data and displays a completion message on the display 3 while the portion is traveling (see download processing 242).

  As described above, the in-vehicle composite system 1 has the digital TV receiving unit 12 between the current position and the destination based on the long distance and travel time of the guide route from the current position to the destination. In addition, since the processing for downloading additional data other than the program content included in the digital broadcast radio wave is performed, the in-vehicle composite system 1 can accurately download the additional data while accurately estimating the opportunity for a longer travel time.

  In addition, the in-vehicle composite system 1 uses the length and travel time of the portion corresponding to the good reception area on the guide route from the current position to the destination as the distance from the current position to the destination. It becomes possible to download additional data by capturing the opportunity to become more accurate.

  Also, additional data may be downloaded during driving against the user's intention by inquiring the user whether download is possible at the time of determining the part of the guide route to download and immediately before the actual download. In addition, it is possible to cope with the user's conversion from the download reservation to the execution.

  In the above embodiment, the system control unit 11 and the car navigation unit 14 correspond to an example of an in-vehicle digital broadcast receiver control device, and the digital TV reception unit 12 corresponds to an example of an in-vehicle digital broadcast receiver. The programs executed by the car navigation control unit 41, such as the in-vehicle digital broadcast receiver control program 500, and the programs executed by the CPU of the system control unit 11, such as the inquiry program 600, are the programs in the claims. It corresponds to an example.

  In addition, the car navigation control unit 41 functions as an example of a current position specifying unit by executing the vehicle position specifying process 412 and functions as an example of a destination receiving unit by receiving a destination input from the operation unit 2. Then, by executing the guide route calculation process 411, it functions as an example of a guide route specifying unit, and by executing the steps 515 and 530 of the in-vehicle digital broadcast receiver control program 500 in the download determination process 414, It functions as an example of a good reception area specifying means by executing the electric field strength reading process 413.

Further, the CPU of the system control unit 11 functions as an example of an inquiry unit by executing the inquiry process 111, and functions as an example of a control unit by executing the receiver control process 112.
(Other embodiments)
As mentioned above, although embodiment of this invention was described, the scope of the present invention is not limited only to the said embodiment, The various form which can implement | achieve the function of each invention specific matter of this invention is included. It is.

  For example, the in-vehicle composite system 1 does not necessarily have the field-specific field strength data in advance, and may acquire only a necessary amount from a server on the network by wireless communication, for example. Further, without using the field-specific field strength data, the additional data may be downloaded on the route when the total route of the guide route is longer than the reference distance.

  Further, the in-vehicle composite system 1 does not necessarily need to calculate a guide route. For example, when the linear distance from the current position to the destination is longer than the reference distance, an area between the current position and the destination ( For example, the additional data may be downloaded when the user is in an elliptical area focusing on the current position and the destination.

  Further, the reference distance may not only change based on the traveling speed for each road as in the above embodiment, but may also change based on the traffic information for each road acquired using, for example, a VICS receiver, It may change randomly within a certain range.

  Further, when the in-vehicle composite system 1 knows the data size of the additional data scheduled to be received stored in the download notification information storage process 241, the reference distance may increase as the size of the additional data increases. .

  In addition, reception of a destination is not limited to input by a vehicle occupant, and may be realized by receiving via a wireless communication network.

  In addition, the current position may be specified by receiving the position coordinates from a road device while traveling near a road device along the road that wirelessly transmits its position coordinates.

  The on-vehicle digital broadcast receiver control device of the present invention is such that the digital TV receiving unit 12, the audio head unit unit 13, and the car navigation unit 14 as in the above embodiment are integratedly managed by the system control unit 11. The car navigation unit 14 includes an in-vehicle digital broadcast receiver, and the car navigation control unit 41 of the car navigation unit 14 executes all of the processes shown in FIGS. May simply download additional data based on the control of the car navigation control unit 41.

  In addition, when the digital TV receiving unit 12 has the own vehicle position detecting unit 42 and the linear distance from the input destination to the current position is equal to or greater than the reference distance, in the region between the current position and the destination The additional data may be downloaded. In this case, the control part of the digital TV receiver 12 corresponds to the in-vehicle digital broadcast receiver control device, and the part for downloading the additional data of the digital TV receiver 12 corresponds to the in-vehicle digital broadcast receiver.

It is a block diagram which shows the structure etc. of the vehicle-mounted composite system. 4 is a block diagram illustrating a configuration of processing contents of a system control unit 11, a digital TV reception control unit 24, and a car navigation control unit 41. FIG. 10 is a flowchart of an in-vehicle digital broadcast receiver control program 500 that is executed by the car navigation control unit 41 for a download determination process 414. 10 is a flowchart of an inquiry program 600 executed by the system control unit 11 for an inquiry process 111. It is a map which shows the guidance route from the present location 62 to the destination 61. It is a figure which shows the display screen 70 for a reservation inquiry. It is a figure which shows the display screen 80 for a last inquiry. It is a figure which shows the display screen for a download completion notification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted complex system, 2 ... Operation part, 3 ... Display, 4 ... Speaker,
11 ... System control unit, 12 ... Digital TV reception unit,
13 ... Audio head unit part, 14 ... Car navigation part, 15 ... Antenna,
21 ... Tuner unit, 22 ... TS demodulation unit, 23 ... Video / audio output unit,
24 ... Digital TV reception control unit, 25 ... Memory unit, 41 ... Car navigation control unit,
42 ... own vehicle position detection unit, 43 ... map information storage unit, 60 ... guide route, 61 ... current location,
62 ... destination, 63 to 67 ... city area, 70, 80 ... display screen,
71, 82 ... inquiry window, 72, 82 ... affirmative buttons,
73, 83 ... Denial button, 74, 84 ... Alert window,
91 ... Completion notification window, 111 ... Inquiry process, 112 ... Receiver control process,
241 ... Download notification information storage process, 242 ... Download process,
411 ... guide route calculation process, 412 ... own vehicle position specifying process,
413 ... electric field strength reading process, 414 ... download determination process,
500: In-vehicle digital broadcast receiver control program, 600: Inquiry program.

Claims (7)

Current position specifying means for specifying the current position;
A destination receiving means for receiving an input of the destination;
Determination means for determining that a distance from a current position specified by the current position specifying means to a destination received by the destination receiving means is longer than a reference distance;
Based on the determination by the determination means, the additional data other than the program content included in the digital broadcast radio wave is received and stored in the digital broadcast receiver mounted on the vehicle between the current position and the destination. A vehicle-mounted digital broadcast receiver control device comprising: control means for performing processing for causing A guide route specifying means for specifying a guide route from the current position specified by the current position specifying means to the destination received by the destination receiving means;
2. The vehicle-mounted device according to claim 1, wherein the determination unit determines that a length of the guide route specified by the route specification unit from the current position to the destination is longer than a reference distance. Digital broadcast receiver controller. The in-vehicle digital broadcast receiver control device according to claim 2, wherein the reference distance is an amount depending on a traveling speed assigned to a road on the guide route. Guidance route specifying means for specifying a guide route from the current position specified by the current position specifying means to the destination received by the destination receiving means;
A good reception area specifying means for specifying an area where the reception intensity of the digital broadcast radio wave is good (hereinafter referred to as a good reception area),
The determination unit is configured such that a distance of a portion corresponding to the good reception area specified by the good reception area specifying unit of the guide route specified by the route specifying unit from the current position to the destination is a reference. Determine that it is longer than the distance,
The in-vehicle digital according to claim 1, wherein the control unit performs processing for receiving and storing the additional data in the digital broadcast receiver in the portion based on the determination of the determination unit. Broadcast receiver control device. The in-vehicle digital broadcast receiver control device according to claim 4, wherein the reference distance is an amount depending on a traveling speed assigned to a road on the portion of the guide route. Based on the determination by the determination means, the user is inquired whether the additional data can be received and stored, and has an inquiry means for accepting the user's reply input to the inquiry,
The control means, based on the fact that the reply input received by the inquiry means is that additional data can be received and stored, during the period from the current position to the destination. 6. The in-vehicle digital broadcast receiver control apparatus according to claim 1, wherein the broadcast receiver performs processing for receiving and storing additional data other than the program content. Current position specifying means for specifying the current position;
A destination receiving means for receiving an input of the destination;
Determining means for determining that the distance from the current position specified by the current position specifying means to the destination received by the destination receiving means is longer than a reference distance; and
Based on the determination by the determination means, the additional data other than the program content included in the digital broadcast radio wave is received and stored in the digital broadcast receiver mounted on the vehicle between the current position and the destination. A program that causes a computer to function as a control means for performing processing.

Images