JP2020048005A - Broadcasting station list creation device - Google Patents

Abstract

To provide a broadcasting station list creation device capable of providing a highly accurate broadcasting station list.SOLUTION: A broadcasting station list creation server 2 includes a scan information acquisition part 111 for acquiring scan information about the reception state of each broadcasting station in a reception frequency band obtained by scan operation of an on-vehicle device 1, a secondary mesh DB update part 112 for creating information stored in a secondary mesh database 120 on the basis of the acquired scan information, a probe information acquisition part 113 for acquiring the probe information about the reception state of a broadcasting station actually receiving by the on-vehicle device 1, a ternary mesh DB update part 114 for creating information stored in a ternary mesh database 130 on the basis of the acquired probe information, and a broadcasting station list creation part 116 for creating a broadcasting station list 2 by using the information of secondary mesh if there is, otherwise on the basis of the information of the ternary mesh.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a broadcast station list creating device that creates and configures a broadcast station list based on information sent from a vehicle.

  Conventionally, broadcast reception information including the radio wave intensity, physical channel, logical channel, and position information of a received television broadcast is obtained from a broadcast receiver, and a channel list (broadcast station list) is created or updated, and upon request, There is known a channel list providing server that transmits the latest channel list to a broadcast receiving device (for example, see Patent Document 1). Each broadcast receiving apparatus uploads broadcast reception information created by acquiring channel information for all channels to a channel list providing server at a predetermined viewing information transmission cycle.

JP 2017-92877 A

  By the way, in the method disclosed in Patent Document 1 described above, it is assumed that the broadcast reception information is transmitted from each broadcast receiving apparatus to the channel list providing server at a predetermined viewing information transmission cycle for all the channels. Although the creation is performed, when considering an in-vehicle digital broadcast receiver as the broadcast receiving device, it is difficult to obtain the broadcast reception information from each broadcast receiving device, and the accuracy of the created channel list may be reduced. There was a problem.

  For example, an in-vehicle digital broadcast receiver is operable when an accessory switch of the vehicle is turned on, so that it is not always possible to acquire broadcast reception information for all channels in a predetermined viewing information transmission cycle. On the other hand, when the accessory switch of the vehicle is on, the broadcast reception information can be acquired. However, for that purpose, it is necessary to acquire the channel information for all the channels, and the process for this takes time. Generally, the time when the accessory switch is turned on is when the vehicle is in use, and it is not practical to acquire channel information for all channels, which takes time in such a situation.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a broadcast station list creating device capable of providing a highly accurate broadcast station list.

  In order to solve the above-described problems, a broadcast station creating apparatus according to the present invention divides a traveling target area of a vehicle into first divided regions having a large area and can receive the divided broadcasting stations for each of the first divided regions. Wide area information storage means for storing the information of the broadcast station, and detailed information storage means for storing the information of the receivable broadcasting station for each of the second divided areas by dividing the traveling target area into the second divided areas having a small area. A scan information acquisition unit for acquiring scan information on a reception state of each broadcast station within a reception frequency band obtained by a scan operation by a broadcast receiver mounted on the first vehicle; and a scan information acquisition unit. Wide area information creating means for creating information stored in the wide area information storage means based on the scan information; and probe information relating to the reception state of the broadcast station actually being received by the broadcast receiver. Probe information acquisition means for acquiring the, based on the probe information acquired by the probe information acquisition means, detailed information creating means for creating information stored in the detailed information storage means, when a specific position is specified, If the information creation by the detailed information creating means has been completed for the second section area including the specific position, a broadcast station list including receivable broadcast stations in the second section area is created. However, if the creation of the information by the detailed information creating means has not been completed and the creation of the information by the wide area information creating means has been completed for the first partitioned area including the specific position, this first Broadcast station list creating means for creating a broadcast station list including broadcast stations that can be received in the segmented area.

  Since broadcast station information collected by the broadcast receivers of a plurality of moving vehicles can be collected as probe information and a broadcast station list can be created, a highly accurate broadcast station list can be created. Become. In addition, since probe information is collected only for broadcasting stations that are receiving, it may be impossible to collect a sufficient number of probe information in areas where the frequency of vehicle travel is low, but in such cases, Alternatively, a broadcast station list with relatively high accuracy can be created by using a broadcast station list created based on scan information sent from each vehicle.

  Further, it is preferable that the above-described first divided region is a secondary mesh of the standard region mesh, and the second divided region is a tertiary mesh of the standard region mesh. By using such a standard area mesh, it is easy to associate with a specified specific position, and information management of a broadcast station for creating a broadcast station list is facilitated.

  Further, when the broadcast station list creation request including the travel position of the second vehicle is sent from the second vehicle, the broadcast station list creation means described above uses the travel position as a specific position to display the broadcast station list. It is desirable to make it. Further, it is desirable to further include a broadcast station list transmitting unit that transmits the broadcast station list created by the above-described broadcast station list creating unit to the second vehicle. Thus, a broadcast station list including broadcast stations that can be received at the traveling position of the vehicle can be created. Further, on the vehicle side, it is possible to acquire the latest broadcast station list according to the traveling position.

  Further, the above-mentioned broadcasting station list creating means, if the creation of the information by the wide area information creating means for the first segmented area including the specific position is not completed, the terrestrial digital television broadcasting operation regulations (ARIB TR According to -B14), it is desirable to create a broadcast station list including a broadcast station specified by an area identification corresponding to a specific position. As a result, a broadcast station list including broadcast stations that are expected to be receivable can be created even in an area where scan information and probe information are not transmitted from the vehicle.

It is a figure showing the whole vehicles system composition of one embodiment. FIG. 3 is a diagram illustrating a detailed configuration of a broadcast station list creation server. It is a figure showing the detailed composition of an in-vehicle device. It is a flowchart which shows the operation | movement procedure of the update process of a secondary mesh database. It is a figure which shows the update object of a secondary mesh when a reception state is favorable. It is a figure which shows the update object of a secondary mesh when a reception state is not favorable. It is a flowchart which shows the operation | movement procedure of the update process of a tertiary mesh database. 6 is a flowchart showing an operation procedure for creating a broadcast station list. It is a figure which shows the specific example of a broadcast station list preparation.

  Hereinafter, an embodiment to which a broadcast station list creation device of the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an overall configuration of a vehicle system according to an embodiment. The vehicle system according to the present embodiment includes an in-vehicle device 1 mounted on each of a plurality of vehicles driven by a user, and a broadcast station list creation server 2 connected to the in-vehicle device 1 via a network 3. Have been.

  In the present embodiment, the in-vehicle device 1 has a function of a terrestrial digital broadcast receiver (broadcast receiver), and can receive one or a plurality of broadcast stations (broadcast signals) transmitted from a broadcast tower around the traveling position. it can.

  In each of the in-vehicle devices 1, a scan operation for frequency-sweeping (scanning) the reception frequency band and detecting each broadcasting station in which the frequency of the broadcast signal is included in the reception frequency band is performed at a predetermined timing (for example, when an instruction from a driver or the like is issued). It is conceivable that there is an instruction from a sales representative or the like at the time of vehicle sale or delivery, etc.), and the identification information of the detected broadcasting station, the reception frequency, the reception state of C / N, etc. The included scan information is transmitted to the broadcast station creation server 2.

  Also, when each in-vehicle device 1 is actually receiving a broadcast signal from any of the broadcast stations, the reception information such as the identification information of the broadcast station (broadcast signal) being received, the reception frequency, the C / N, etc. Probe information including the information is transmitted to the broadcast station creation server 2.

  Further, at each vehicle-mounted device 1, at a predetermined timing while the vehicle is traveling (for example, when the vehicle crosses the boundary of the tertiary mesh as the standard area mesh), the broadcast station list transmission to the broadcast station list creation server 2 is performed. Send a request and receive the returned station list.

  FIG. 2 is a diagram showing a detailed configuration of the broadcast station list creation server 2. As shown in FIG. 2, the broadcast station creation server 2 includes a communication processing unit 100, a control unit 110, a secondary mesh database (DB) 120, and a tertiary mesh database (DB) 130.

  The communication processing unit 100 performs a modulation process on a signal suitable for a communication line with the network 3 and a demodulation process on the signal, and transmits and receives various information to and from the vehicle-mounted device 1 via the network 3.

  The control unit 110 controls the entire broadcast station list creation server 2, and executes a program stored in a RAM or a ROM or a program stored in another memory by a CPU to control the broadcast station list. Performs various processes related to

  The secondary mesh database 120 divides a travel target area (for example, in Japan) of a vehicle into first large divided areas and stores information on receivable broadcasting stations for each first divided area. I do. As the first segmented area, for example, a secondary mesh of a standard area mesh is used. In the initial state, an area identification defined in the digital terrestrial television broadcasting operation regulations (ARIB TR-B14) is assigned to each secondary mesh. By making such an assignment, it is possible to determine a broadcast station that may be receivable at a location corresponding to each secondary mesh by a network identification / TS identification corresponding to a region identification.

  The tertiary mesh database 130 divides the area into which the vehicle travels into smaller second divided areas, and stores information on receivable broadcasting stations for each of the second divided areas. As the second section area, for example, a tertiary mesh of a standard area mesh is used. In the initial state, an area identification defined in the digital terrestrial television broadcasting operation regulations (ARIB TR-B14) is assigned to each tertiary mesh. By performing such an assignment, it is possible to determine a broadcast station that may be receivable at a location corresponding to each tertiary mesh by a network identification / TS identification corresponding to a region identification.

  The control unit 110 includes a scan information acquisition unit 111, a secondary mesh DB update unit 112, a probe information acquisition unit 113, a tertiary mesh DB update unit 114, a broadcast station list transmission request reception unit 115, and a broadcast station list creation. And a broadcast station list transmitting unit 117.

  The scan information acquisition unit 111 acquires scan information transmitted from each vehicle-mounted device 1 by receiving the scan information via the network 3. The scan information includes a secondary mesh code that specifies a secondary mesh corresponding to the position of the vehicle on which the in-vehicle device 1 serving as the transmission source is located, and a broadcast station (broadcast) detected by the scanning operation of the in-vehicle device 1 Signal identification information (for example, network identification / TS identification defined in the terrestrial digital television broadcasting operation regulations (ARIB TR-B14)), the reception frequency of the broadcast signal, C / N, and the like.

  The secondary mesh DB updating unit 112 updates the broadcast station information for each secondary mesh stored in the secondary mesh database 120 when the scan information is acquired by the scan information acquiring unit 111. The details of this updating process will be described later.

  The probe information acquisition unit 113 acquires probe information sent from each vehicle-mounted device 1 by receiving the probe information via the network 3. The probe information includes a tertiary mesh code for specifying a tertiary mesh corresponding to the position of the vehicle on which the in-vehicle device 1 serving as the transmission source is located, and identification of a broadcast station (broadcast signal) being received by the in-vehicle device 1 Information, the reception frequency of the broadcast signal, C / N, and the like.

  The tertiary mesh DB updating unit 114 updates the broadcast station information for each tertiary mesh stored in the tertiary mesh database 130 when the probe information is acquired by the probe information acquiring unit 113. The details of this updating process will be described later.

  The broadcast station list transmission request receiving unit 115 receives a broadcast station list transmission request sent from each in-vehicle device 1. This broadcast station list transmission request includes a tertiary mesh code for specifying a tertiary mesh corresponding to the position of the vehicle on which the in-vehicle device 1 serving as the transmission source is located. You can see if you want.

  When the broadcast station list transmission request receiving section 115 receives a broadcast station list transmission request, the broadcast station list creating section 116 creates a broadcast station list corresponding to the tertiary mesh code included in the transmission request. The broadcast station list transmitting section 117 transmits the broadcast station list created by the broadcast station list creating section 116 to the source of the broadcast station list transmission request.

   FIG. 3 is a diagram illustrating a detailed configuration of the vehicle-mounted device 1. As shown in FIG. 3, the in-vehicle device 1 includes a navigation processing unit 10, a TV tuner processing unit 14, an operation unit 20, an input control unit 24, a display processing unit 30, a display device 32, a digital-analog converter (D / A). ) 40, a speaker 42, a control unit 50, a hard disk device (HDD) 70, and a USB interface unit (USB I / F) 80.

  The navigation processing unit 10 performs a navigation operation for guiding the traveling of the vehicle equipped with the in-vehicle device 1 using the map data stored in the hard disk device 70. Used together with the GPS device 12 for detecting the position of the vehicle. In the present embodiment, it is assumed that the navigation processing unit 10 specifies a tertiary mesh code corresponding to the traveling position of the vehicle and determines whether or not to enter an adjacent tertiary mesh. The TV tuner processing unit 14 receives a terrestrial digital broadcast signal and performs processing for reproducing video and audio.

  The operation unit 20 is for receiving various operations by the user, and includes various switches and operation knobs. The input control unit 24 monitors an operation state of the operation unit 20 and detects an input content by a user.

  The display processing unit 30 outputs video signals for displaying various operation screens and the like, displays these screens on the display device 32, and receives the map screen created by the navigation processing unit 10 and the TV tuner processing unit 14. A video signal for displaying a video screen or the like corresponding to the terrestrial digital broadcast signal is output, and these screens are displayed on the display device 32. The display device 32 is installed in the front center of the driver's seat and the front passenger seat, and is configured using, for example, a liquid crystal display device (LCD).

  The digital-analog converter 40 converts audio data such as audio and music generated by the processing of the navigation processing unit 10 and the TV tuner processing unit 14 into analog audio signals and outputs the analog audio signals from the speaker 42.

  The control unit 50 controls the entire in-vehicle apparatus 1, and is realized by executing a predetermined program stored in a ROM, a RAM, or the like by the CPU.

  The USB interface unit 80 is for inputting and outputting signals to and from the portable terminal device 90 via a USB cable. The USB interface unit 80 includes a USB port and a USB host controller. Note that the connection between the in-vehicle device 1 and the portable terminal device 90 may be established using Bluetooth (registered trademark) or a wireless LAN. The use of the mobile terminal device 90 enables an Internet connection with various servers. The function of the mobile terminal device 90 may be built in the vehicle-mounted device 1. Alternatively, an Internet connection may be established by performing communication with an external access point (not shown) using a wireless LAN.

  In addition, the control unit 50 described above performs a scan processing unit 51, a scan information transmission unit 52, a probe processing unit 53, and a probe information transmission unit in order to create and acquire a broadcast station list in cooperation with the broadcast station list creation server 2. A broadcast station list transmission request processing section 55; a broadcast station list receiving section 56; and a broadcast station list display section 57.

  The scan processing unit 51 performs a TV tuner process at a predetermined timing such as when there is an instruction from a driver or the like, or when there is an instruction from a sales clerk when selling or delivering a vehicle, or the like. The scan operation is performed to detect each broadcast station in which the frequency of the broadcast signal is included in the reception frequency band. By this scanning operation, scan information including identification information of the detected broadcast station, a reception frequency, a reception state such as C / N, and the like is created.

  The scan information transmission unit 52 transmits the scan information created by the scan processing unit 51 to the broadcast station list creation server 2 together with the secondary mesh code corresponding to the position of the vehicle at the time of the scan operation.

  While the TV tuner processing unit 14 is receiving any broadcast station (broadcast signal), the probe processing unit 53 transmits probe information including identification information of the broadcast station, a reception frequency, a reception state such as C / N, and the like. create.

  The probe information transmitting unit 54 performs a process of transmitting the probe information created by the probe processing unit 53 to the broadcast station list creating server 2 together with the tertiary mesh code corresponding to the position of the vehicle at the time of creating the probe information.

  The broadcast station list transmission request processing unit 55 creates a broadcast station list transmission request including a tertiary mesh code for specifying the tertiary mesh when the running vehicle enters the adjacent tertiary mesh, and A process of transmitting the list to the list creation server 2 is performed.

  The broadcast station list receiving unit 56 receives the broadcast station list transmitted from the broadcast station list creation server 2 in response to the broadcast station list transmission request transmitted by the broadcast station list transmission request processing unit 55.

  The broadcast station list display unit 57 performs a process of displaying the broadcast station list received by the broadcast station list receiving unit 56 on the display device 32. A broadcast station list screen including the broadcast station list is created, and this screen is displayed on the display device 32 by the display processing unit 30. The display of the broadcast station list is performed when a tuning operation by the TV tuner processing unit 14 is instructed.

  The above-described secondary mesh database 120 is a wide area information storage unit, the tertiary mesh database 130 is a detailed information storage unit, the scan information acquisition unit 111 is a scan information acquisition unit, and the secondary mesh DB update unit 112 is a wide area information creation unit. In addition, the probe information acquiring unit 113 broadcasts the probe information, the tertiary mesh DB updating unit 114 broadcasts the detailed information, the broadcast station list producing unit 116 broadcasts the broadcast station list, and the broadcast station list transmitting unit 117 broadcasts the broadcast. The broadcast station list creating server 2 corresponds to the station list transmitting unit, and corresponds to the broadcast station list creating device.

  The vehicle system of the present embodiment has such a configuration, and the operation will be described next.

(Update operation of secondary mesh database 120)
FIG. 4 is a flowchart showing the operation procedure of the update processing of the secondary mesh database 120. The scan information acquisition unit 111 determines whether scan information sent from the vehicle-mounted device 1 mounted on any vehicle has been received (step 100). If not received, a negative determination is made and this determination is repeated.

  Further, when the scan information sent from any of the in-vehicle devices 1 is received, an affirmative determination is made in the determination of step 100. Next, the secondary mesh DB updating unit 112 extracts one scan detection station included in the scan information (step 102), and the C / N of the broadcast station (broadcast signal) becomes greater than a predetermined value (for example, 25 dB). It is determined whether it is high (step 104).

  If it is high (the reception condition is good), a positive determination is made. Next, the secondary mesh DB updating unit 112 determines that the broadcast signal of this broadcast station can be received in a wide range including the secondary mesh from which the scan information has been acquired, and includes the secondary mesh. Then, a range obtained by adding two secondary meshes on the upper, lower, left and right sides is set as an update target (step 106).

  FIG. 5 is a diagram illustrating an update target of the secondary mesh when the reception state is good. In FIG. 5, a secondary mesh from which scan information is acquired is indicated by A. Also, a range in which two secondary meshes are added at the top, bottom, left, and right of the center of A is hatched, and the hatched range is an update target when the reception state is good. .

  On the other hand, when it is low (when the reception state is not good), a negative determination is made in the determination of step 104. Next, the secondary mesh DB update unit 112 determines that the broadcast signal of this broadcast station can be received in a narrow range including the secondary mesh from which the scan information is acquired, and includes the secondary mesh. Then, a range obtained by adding one secondary mesh to the upper, lower, left, and right sides is set as an update target (step 108).

  FIG. 6 is a diagram illustrating an update target of the secondary mesh when the reception state is not good. In FIG. 6, a secondary mesh from which scan information is acquired is indicated by B. Also, a range obtained by adding one secondary mesh to each of the upper, lower, left, and right around B is hatched, and the hatched range is an update target when the reception state is not good. .

  Next, the secondary mesh DB update unit 112 updates the broadcast station information for the set secondary mesh to be updated (step 110). For example, for each secondary mesh, it is determined whether the network identification, frequency, and C / N as identification information of the broadcast station of interest are registered or not registered (initial state). , These data included in the scan information are newly registered. If the registration has been completed, the C / N included in the current scan information is used to update the previous C / N. For example, an average value of C / N is calculated by adding a new C / N. When a plurality of frequencies for the same broadcasting station are registered in one secondary mesh, the frequency having the highest C / N (average value) is selected as a tuning candidate in the secondary mesh of the broadcasting station. Is set as

  Next, the secondary mesh DB updating unit 112 determines whether or not another scan detection station is included in the scan information (Step 112). If another scan detection station exists, an affirmative determination is made, and the process returns to step 102, where the next scan detection station is extracted and the same processing is repeated. If there is no other scan detection station, a negative determination is made in the determination of step 110. In this case, the process returns to step 100 and the reception determination of the scan information is repeated.

(Update operation of tertiary mesh database 130)
FIG. 7 is a flowchart showing the operation procedure of the update processing of the tertiary mesh database 130. The probe information acquisition unit 113 determines whether or not probe information sent from the vehicle-mounted device 1 mounted on any vehicle has been received (step 200). If not received, a negative determination is made and this determination is repeated.

  Further, when the probe information transmitted from any of the in-vehicle devices 1 is received, an affirmative determination is made in the determination of step 200. Next, the tertiary mesh DB updating unit 114 updates the broadcast station information for the tertiary mesh from which the probe information has been acquired (step 202). For example, for this tertiary mesh, it is determined whether the network identification, frequency, and C / N as the identification information of the broadcast station included in the probe information are registered or not registered (initial state). , These data included in the probe information are newly registered. If the information has already been registered, the C / N included in the current probe information is used to update the previous C / N. For example, an average value of C / N is calculated by adding a new C / N. When a plurality of frequencies for the same broadcasting station are registered in the tertiary mesh, the frequency with the highest C / N (average value) is selected as a channel selection candidate in the tertiary mesh for the broadcasting station. Is set. Thereafter, the process returns to step 200, and the reception determination of the probe information is repeated.

(Broadcast station list creation operation)
FIG. 8 is a flowchart showing an operation procedure for creating a broadcast station list. The broadcast station list transmission request receiving unit 115 determines whether a broadcast station list transmission request transmitted from the vehicle-mounted device 1 mounted on any vehicle has been received (step 300). If not received, a negative determination is made and this determination is repeated.

  Further, when a broadcast station list transmission request transmitted from any of the in-vehicle devices 1 is received, an affirmative determination is made in the determination of step 300. Next, the broadcast station list creating unit 116 determines whether or not the updated information of the broadcast station is stored in the tertiary mesh corresponding to the tertiary mesh code included in the received broadcast station list transmission request. (Step 302). Here, "updated" means that the information of all the broadcasting stations specified by all the network IDs / TS IDs corresponding to the area IDs stored as the initial state in the tertiary mesh is updated, and the frequency and C / N is stored. If it has been updated, a positive determination is made. In this case, the broadcast station list creating unit 116 determines the network identification / TS identification, the broadcast station name, and the frequency of each broadcast station corresponding to the updated tertiary mesh (if a plurality of frequencies exist, C A broadcast station list including a frequency set as a selection candidate with the highest / N) is created (step 304). Then, the broadcast station list transmitting section 117 transmits the created broadcast station list to the in-vehicle apparatus 1 that has transmitted the broadcast station list transmission request (step 306). Thereafter, returning to step 300, the reception determination of the broadcast station list transmission request is repeated.

  If the information of the broadcasting stations (information of all broadcasting stations or some broadcasting stations) stored in the tertiary mesh of interest has not been updated, a negative determination is made in the determination of step 302. . In this case, the broadcast station list creating unit 116 determines whether or not the updated information of the broadcast station is stored in the secondary mesh including the tertiary mesh of interest (step 308). Here, “updated” means that the information of all the broadcasting stations specified by all the network IDs / TS IDs corresponding to the area IDs stored in the secondary mesh as an initial state is updated, and the frequency and C / N is stored. If it has been updated, a positive determination is made. In this case, the broadcast station list creating unit 116 determines the network identification / TS identification, the broadcast station name, and the frequency of each broadcast station corresponding to the updated secondary mesh (if a plurality of frequencies exist, C A broadcast station list including a frequency set as a selection candidate with the highest / N) is created (step 310). Thereafter, the process proceeds to step 306, where the broadcast station list is transmitted.

  If the broadcast station information stored in the two meshes of interest has not been updated (the initial state is maintained), a negative determination is made in the determination of step 308. In this case, the broadcast station list creation unit 116 generates a broadcast station list including the network identification / TS identification of each broadcast station corresponding to the tertiary mesh (initial state) of interest and the broadcast station name (no frequency). Is created (step 312). Thereafter, the process proceeds to step 306, where the broadcast station list is transmitted.

  FIG. 9 is a diagram showing a specific example of creating a broadcast station list. In FIG. 9, b indicates a tertiary mesh corresponding to the traveling position of the vehicle, and probe information has not been received for a broadcasting station (CBC television) of network identification 7FC3 included in the tertiary mesh. The information stored in the next mesh is not updated. On the other hand, a indicates a secondary mesh including a tertiary mesh b, and information on the secondary mesh has been updated.

  In such a state, when a broadcast station list transmission request is sent from the in-vehicle device 1 mounted on the vehicle traveling on the tertiary mesh b, the broadcast station list creation server 2 corresponds to the tertiary mesh b. A broadcast station list is created using information corresponding to the secondary mesh a instead of the information, and is sent to the in-vehicle device 1.

  As described above, the broadcast station list creation server 2 of the present embodiment collects, as probe information, broadcast station information actually received by the in-vehicle devices 1 of a plurality of running vehicles to create a broadcast station list. Therefore, it is possible to create a highly accurate broadcast station list. In addition, since probe information is collected only for broadcasting stations that are receiving, it may be impossible to collect a sufficient number of probe information in areas where the frequency of vehicle travel is low, but in such cases, Alternatively, by using the broadcast station list created based on the scan information sent from the in-vehicle device 1 of each vehicle, a broadcast station list with relatively high accuracy can be created.

  In addition, by using a secondary mesh or a tertiary mesh as a standard area mesh, it is easy to associate with a specified specific position, and information management of a broadcast station for creating a broadcast station list is facilitated. Become. In addition, by setting the specific position as the travel position of the vehicle, a broadcast station list including broadcast stations that can be received at the travel position of the vehicle can be created. Further, on the vehicle side, it is possible to acquire the latest broadcast station list according to the traveling position.

  Also, a broadcast station list including broadcast stations that are expected to be receivable can be created for an area where scan information and probe information are not transmitted from the in-vehicle apparatus 1 (step 312 in FIG. 8). Case).

  Note that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, as shown in FIGS. 5 and 6, the range of the secondary mesh for updating the information based on the scan information is changed according to the C / N of the broadcasting station. The manner may be changed as appropriate. Alternatively, the information may be constantly updated for a secondary mesh within a certain range without being changed.

  As described above, according to the present invention, it is possible to create a broadcast station list by collecting, as probe information, broadcast station information that is actually being received by the broadcast receivers of a plurality of running vehicles, A highly accurate broadcast station list can be created. In addition, since probe information is collected only for broadcasting stations that are receiving, it may be impossible to collect a sufficient number of probe information in areas where the frequency of vehicle travel is low, but in such cases, Alternatively, a broadcast station list with relatively high accuracy can be created by using a broadcast station list created based on scan information sent from each vehicle.

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Broadcast station list creation server 3 Network 100 Communication processing unit 111 Scan information acquisition unit 112 Secondary mesh DB update unit 113 Probe information acquisition unit 114 Tertiary mesh DB update unit 115 Broadcast station list transmission request reception unit 116 Broadcast station List creating unit 117 Broadcasting station list transmitting unit 110 Control unit 120 Secondary mesh database (DB)
130 Tertiary mesh database (DB)

Claims (5)

Wide-area information storage means for dividing an area to be traveled by the vehicle into first section areas having a large area and storing information on receivable broadcasting stations for each first section area;
Detailed information storage means for dividing the traveling target area into second divided areas having a small area and storing information on receivable broadcasting stations for each of the second divided areas;
Scan information acquisition means for acquiring scan information on the reception state of each broadcast station within a reception frequency band obtained by a scan operation by a broadcast receiver mounted on the first vehicle;
Based on the scan information acquired by the scan information acquisition means, a wide area information creating means for creating information stored in the wide area information storage means,
Probe information acquisition means for acquiring probe information on the reception state of the broadcast station that is actually receiving by the broadcast receiver,
Based on the probe information obtained by the probe information obtaining means, based on the detailed information creating means to create information stored in the detailed information storage means,
When the specific position is designated and the creation of the information by the detailed information creating means is completed for the second divided area including the specific position, the reception is performed in the second divided area. A broadcast station list including possible broadcast stations is created, and the creation of information by the detailed information creating unit is not completed, and the wide area information creating unit performs the first divisional area including the specific position. A broadcast station list creating means for creating a broadcast station list including receivable broadcast stations in the first sectioned area when the information creation has been completed;
A broadcast station list creation device, comprising:   2. The broadcasting station list creating device according to claim 1, wherein the first divided area is a secondary mesh of a standard area mesh, and the second divided area is a tertiary mesh of a standard area mesh. 3.   The broadcast station list creating means, when a broadcast station list creation request including the travel position of the second vehicle is sent from the second vehicle, creates the broadcast station list as the specific position using the travel position as the specific position. 3. The broadcast station list creating device according to claim 1, wherein   The broadcast station list creating device according to claim 3, further comprising: a broadcast station list transmitting unit that transmits the broadcast station list created by the broadcast station list creating unit to the second vehicle.   The broadcasting station list creating means, if the creation of information by the wide area information creating means has not been completed for the first segmented area including the specific position, terrestrial digital television broadcasting operation rules (ARIB TR) The broadcast station according to any one of claims 1 to 4, wherein a broadcast station list including a broadcast station specified by an area identification corresponding to the specific position is created according to -B14). List creation device.

Images