JP2013236312A - Broadcast area information generation system and broadcast area information generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast area information generation system and a broadcast area information generation method capable of selecting an optimum reception channel in accordance with a vehicle present position and an antenna installation position.SOLUTION: An on-vehicle unit 100 acquires vehicle present position information, vehicle height information related to an antenna installation position, channel information of a broadcast station receivable or unreceivable at a present position, and reception mode information indicating a reception possibility of a one-segment broadcast/full-segment broadcast, and transmits the pieces of information to a server 200. The server 200 generates broadcast area information including even information on which one of a one-segment broadcast and a full-segment broadcast can be received in accordance with a vehicle height in addition to information on which broadcast station channel can be received, for each digital broadcast receivable area. Thus, an optimum reception channel by which a full-segment broadcast is received as much as possible can be selected in accordance with a vehicle present position and a vehicle height.

Description

  The present invention relates to a broadcast area information generation system and a broadcast area information generation method, and more particularly to a method for generating broadcast area information used in an in-vehicle digital broadcast receiver having a function of appropriately switching a reception channel as a vehicle moves. is there.

  In recent years, in-vehicle digital broadcast receivers have become widespread. In a vehicle-mounted digital broadcast receiver, if a vehicle moves out of a receivable area while viewing a digital broadcast of a certain channel, the digital broadcast of the channel that has been viewed cannot be received. In response to this problem, there is known a digital broadcast receiving apparatus that can continue receiving digital broadcasts even in a destination area (see, for example, Patent Documents 1 and 2).

  In the mobile communication terminal described in Patent Document 1, channel information of broadcast stations that can be received in an area where the mobile communication terminal is located is preset in the storage unit. And based on the channel information preset in this memory | storage part, reception of the broadcast which the user selected is started. Further, in Patent Document 1, information on the current location is transmitted to a server including a database that stores location information of a plurality of regions in association with channel information of broadcast stations that can be received in each region. It is also described that channel information of broadcast stations that can be received in the area where the mobile communication terminal is located is acquired from the server.

  In the broadcast receiving apparatus described in Patent Document 2, broadcast reception sensitivity information indicating the reception sensitivity of a reception broadcast station at a travel point is collected and stored as the vehicle travels, and the stored broadcast reception sensitivity information is transmitted to the information center. To do. Then, the received broadcast reception sensitivity information is aggregated to update the receivable area for each broadcast station, and the broadcast station list is updated according to the updated receivable area for each broadcast station.

JP 2007-318365 A JP 2008-78875 A

  By the way, Japanese terrestrial digital broadcasting has a structure in which the frequency bandwidth of one channel is divided into 13 segments, of which 12 segments are allocated to high-definition broadcasting and 4 segments are allocated to standard-definition broadcasting. . In addition, only one segment is allocated to broadcasting for mobile terminals such as mobile phones and in-vehicle devices having a small screen from the viewpoint of emphasizing mobility rather than image quality.

  Broadcasting for mobile terminals is referred to as “one-segment broadcasting” by omitting one segment. On the other hand, high-definition broadcasting that broadcasts one program using all 12 segments and standard-definition broadcasting that broadcasts up to three programs using 12 segments are called “full-segment broadcasting”. When receiving a digital broadcast of a channel corresponding to the current position of the vehicle, it is desired to be able to receive as much as possible a full segment broadcast with better image quality than the one-segment broadcast.

  On the other hand, in the techniques described in Patent Documents 1 and 2, channel information (broadcast station list) of broadcast stations that can be received in the area corresponding to the current position is stored on the server. However, the channel information only shows which broadcasting station's channel can be received in the area corresponding to the current position, and cannot identify whether one-segment broadcasting or full-segment broadcasting can be received. was there.

  In addition, the reception sensitivity of terrestrial digital broadcasting is greatly influenced not only by the environment around the receiving apparatus but also by the installation position (ground height) of the antenna. However, the channel information described in Patent Documents 1 and 2 is not generated in consideration of the antenna installation position. For this reason, there is a problem in that it is not always possible to select an optimal reception channel for receiving full-segment broadcasting as much as possible even in accordance with channel information corresponding to a broadcast area.

  The present invention has been made to solve such a problem, and it is possible to select an optimal reception channel for receiving full-segment broadcasting as much as possible according to the current position of the vehicle and the installation position of the antenna in the vehicle. The purpose is to obtain information on the broadcast area.

  In order to solve the above-described problems, in the present invention, in the in-vehicle device, the current position information of the vehicle, the antenna position information regarding the installation position of the antenna in the vehicle, the channel information of the broadcasting station that can be received or cannot be received at the current position. And reception mode information indicating whether the broadcasting station can receive the one-segment broadcasting or the full-segment broadcasting, and transmits it to the server. Whether the server can receive one-segment broadcasting according to the channel information of the receivable broadcasting station and the installation position of the antenna for each receivable area of the digital broadcasting based on the information sent from the in-vehicle device. Reception mode information indicating whether full-segment broadcasting can be received is generated as broadcast area information.

  According to the present invention configured as described above, the generated broadcast area information includes information on which broadcast station channels can be received in the area corresponding to the current position of the vehicle, as well as one-segment broadcasting and full-segment broadcasting. It also includes information on which can be received. In addition, the information indicating whether or not reception is possible is generated in consideration of the installation position of the antenna. Therefore, the in-vehicle digital broadcast receiving apparatus can use the broadcast area information to select an optimal reception channel for receiving full-segment broadcasting as much as possible according to the current position of the vehicle and the installation position of the antenna in the vehicle. become.

It is a figure which shows the structural example of the broadcast area information generation system by this embodiment. It is a figure which shows an example of the broadcast area information by this embodiment. It is a figure which shows the receiving area according to vehicle height of full segment broadcasting / one segment broadcasting in this embodiment. It is a figure which shows the example of the receiving channel information which the information transmission part of this embodiment transmits to a server. It is a flowchart which shows the operation example (broadcast area information generation method) of the broadcast area information generation system by this embodiment. It is a flowchart which shows the operation example (reception channel switching method) of the vehicle-mounted digital broadcast receiver by this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a broadcast area information generation system according to the present embodiment. As shown in FIG. 1, the broadcast area information generation system of the present embodiment includes an in-vehicle device 100 and a server 200, and the in-vehicle device 100 and the server 200 are connected via a communication network 300 such as the Internet. It is configured to be possible.

  The in-vehicle device 100 includes an in-vehicle digital broadcast receiving device, a current position detecting device 20, and a system memory 30. In FIG. 1, among the configurations included in the in-vehicle device 100, the configuration other than the current position detection device 20 and the system memory 30 is the configuration of the in-vehicle digital broadcast receiving device. Further, the current position detection device 20 and the system memory 30 are provided in a vehicle-mounted navigation device.

  In the configuration of the in-vehicle digital broadcast receiver, the antenna 1 receives radio waves of digital broadcast. The tuner 2 selectively extracts a broadcast wave signal having a reception frequency matching a desired channel from the digital broadcast radio wave received by the antenna 1 and outputs the broadcast wave signal.

  The OFDM demodulator 3 demodulates the broadcast wave signal received by the tuner 2 by OFDM (Orthogonal Frequency-Division Multiplexing) to obtain a transport stream (hereinafter referred to as TS). The error correction unit 4 corrects errors generated in the transmission path for the TS demodulated by the OFDM demodulation unit 3.

  The demultiplexer unit 5 obtains a video stream, an audio stream, and a data stream by separating the multiplexed TS. Then, the demultiplexer unit 5 outputs the audio stream to the audio decoder unit 6, outputs the video stream to the video decoder unit 7, and outputs the data stream to the data decoder unit 8. Here, the data stream includes information on the receiving channel such as the broadcasting station name, TSID, affiliated station ID, and physical channel, and information on the program such as the program name, broadcasting date and time, and description of the contents.

  The audio decoder unit 6 decodes the input audio stream and outputs it as an audio signal. The video decoder unit 7 decodes the input video stream and outputs it as a video signal. The data decoder 8 decodes the input data stream and outputs it as control data.

  The broadcast area information storage unit 9 receives, for each digital broadcast receivable area, a broadcast station capable of receiving digital broadcasts, channel information indicating the channels, and one-segment broadcasts according to the antenna installation position (ground height). Reception mode information indicating whether it is possible to receive full-segment broadcasting is stored as broadcast area information. A method for generating broadcast area information stored in the broadcast area information storage unit 9 will be described later.

  FIG. 2 is a diagram illustrating an example of broadcast area information. As shown in FIG. 2, the broadcast area information stored in the broadcast area information storage unit 9 includes, as items, a broadcast station name, a TSID, an affiliated station ID, a reception mode, and a physical channel. Among these, the above-described channel information is constituted by the broadcasting station name, TSID, affiliated station ID, and physical channel.

  Here, the reception mode is information indicating whether the one-segment broadcasting can be received or the full-segment broadcasting can be received according to the ground height where the antenna is installed. In general, whether or not full-segment broadcasting can be received varies depending on the ground height at which the antenna is installed. This is because the reception sensitivity is improved when the antenna is installed at a high position, and the reception sensitivity is deteriorated when the installation position is low. On the other hand, the ground height where the antenna is installed varies depending on the vehicle type. That is, in the case of a vehicle type with a high vehicle height, the installation position of the antenna is high, and the area where full-segment broadcasting can be received increases. On the other hand, in the case of a vehicle type with a low vehicle height, the antenna installation position is low, and the area in which full-segment broadcasting can be received decreases. Therefore, in this embodiment, the reception possibility of one-segment broadcasting or full-segment broadcasting is shown as the reception mode according to the vehicle height.

  The physical channel is information indicating the channel (reception frequency) of the broadcasting station. The broadcast station name indicates the name of a broadcast station that can receive a digital broadcast. The TSID is an ID unique to the broadcasting station, and is assigned a unique ID nationwide. The affiliated station ID is an ID indicating which affiliated station the broadcast station belongs to. For example, when the affiliated station ID = 0, NHK general is assigned, when affiliated station ID = 1, NHK education is assigned, and when affiliated station ID = 2, affiliated ID is assigned.

  For example, broadcast stations having the same TSID and different physical channels are in a relay station relationship. In addition, broadcasting stations having different TSIDs but having the same affiliated station ID are in a relationship of affiliated stations. In the example of FIG. 1 and 2 broadcasting stations, It is shown that the broadcasting stations 3 and 4 are affiliated with each other. No. 3 and 4 broadcasting stations, It is shown that the broadcasting station 5 has a relay station relationship with each other.

  In the present embodiment, for example, the nationwide broadcast area is divided into fine meshes, and the broadcast area information shown in FIG. 2 is stored in the broadcast area information storage unit 9 for each mesh (digital broadcast receivable area). Yes. Here, in a single mesh, when a digital broadcast can be received on a plurality of channels by combining a relay station and an affiliated station, a plurality of broadcast area information is stored. In addition, even when the same channel can receive both full-segment broadcasting and one-segment broadcasting, the broadcasting area information is stored in two.

  In the example of FIG. 2, five pieces of broadcast area information are shown. Of these, No. No. 1 broadcasting station and No. 1 broadcasting station. The two broadcasting stations are the same (TSID, affiliated station ID, and physical channel are all the same), but whether full seg broadcasting can be received or not depends on the vehicle height. Broadcast area information is stored in two. No. No. 3 broadcasting station and No. 3 broadcasting station. 4 broadcast stations can receive both full-segment broadcasts and one-segment broadcasts at all vehicle heights, but the broadcast station information is stored in the same broadcast station but divided into two segments: full-segment broadcasts and one-segment broadcasts. .

  The current position information acquisition unit 10 acquires current position information from the current position detection device 20 that detects the current position. The vehicle height information acquisition unit 11 corresponds to the antenna position information acquisition unit of the present invention, and acquires vehicle height information from the system memory 30 as antenna position information regarding the antenna installation position. Since the antenna is generally installed at a high position on the rear glass of the vehicle or on the roof, the vehicle height information is used as the antenna position information in this embodiment. In the system memory 30, vehicle height information corresponding to the vehicle type is stored in advance.

  The channel switching unit 12 reads out broadcast area information of a receivable area (mesh) corresponding to the current position information acquired by the current position information acquisition unit 10 from the broadcast area information storage unit 9, and based on the read broadcast area information. Thus, the reception channel corresponding to the vehicle height information acquired by the vehicle height information acquisition unit 11 is selected and switched.

  At this time, the channel switching unit 12 indicates that a full-segment broadcast can be received from a broadcast station that is indicated to be able to receive a one-segment broadcast by the reception mode information included in the broadcast area information. The tuner 2 is controlled so as to select a channel indicated by the channel information with priority given to the broadcast station being broadcast. If the same broadcasting station can receive both one-segment broadcasting and full-segment broadcasting, the tuner 2 is controlled to receive the full-segment broadcasting.

  Also, the channel switching unit 12 selects a broadcast station that is indicated as a relay station rather than a broadcast station that is indicated as an affiliated station by the broadcast station information included in the broadcast area information. The tuner 2 is controlled so that the channel indicated by the channel information is preferentially selected.

  FIG. 3 is a diagram showing reception areas according to vehicle height of full-segment broadcasting / one-segment broadcasting. FIG. 3A shows a reception area related to a vehicle type with a low vehicle height, and FIG. 3B shows a reception area related to a vehicle type with a high vehicle height. In FIG. 3, one set of broadcast area information is stored for one mesh (rectangular region). As shown in FIG. 2, the broadcast area information includes reception mode information indicating whether full segment broadcasting or one segment broadcasting can be received according to the vehicle height. Depending on the vehicle height, the area in which full-segment broadcasting can be received varies depending on the vehicle height-specific reception mode information.

  In FIG. 3, reference numeral 31 is a relay station A full-seg broadcast receivable area (can also receive one-segment broadcasts), 32 is a relay station B full-seg broadcast receivable area (can also receive one-seg broadcasts), and 33 is a one-seg broadcast receivable area ( Full-segment broadcasting cannot be received). Of the one-segment broadcast receivable area 33, between the full-segment broadcast receivable area 31 of the relay station A and the full-segment broadcast receivable area 32 of the relay station B, the one-segment broadcast of the relay station A and the one-segment broadcast of the relay station B There are areas where broadcasts can be received.

  As is clear from a comparison between FIG. 3A and FIG. 3B, in the case of a vehicle type with a high vehicle height, the full-segment broadcast receivable area 31 of the relay station A and the full-segment broadcast receivable area 32 of the relay station B. However, it is wider than the low-car models. In the present embodiment, the channel switching unit 12 controls the tuner 2 so that the full-segment broadcasting is preferentially received in the area where the full-segment broadcasting can be received. The reception rate of full-segment broadcasting can be increased.

  The receivable information acquisition unit 13 can receive channel information of a broadcasting station that can be received or cannot be received at the current position at a predetermined timing, and can receive one-segment broadcasting or full-segment broadcasting at the broadcasting station. The reception mode information indicating this is acquired from the tuner 2 or the data decoder unit 8. The channel information acquired here is the broadcasting station name, TSID, affiliated station ID, and physical channel described with reference to FIG.

  The predetermined timing at which the receivable information acquisition unit 13 acquires the channel information and the reception mode information is, for example, when a scan process is executed by an operation of an operator (not shown) by the user. The scan process is a process of creating a channel list by detecting all receivable channels at the current position by the tuner 2. When this scan process is executed, the receivable information acquisition unit 13 acquires channel information and reception mode information regarding all channels (receivable broadcast station channels) detected by the scan process.

  The predetermined timing is when the seek process is executed by the operation of the operator by the user. The seek processing is performed by automatically checking whether each channel is receivable while controlling the tuner 2 to switch the reception frequency one channel at a time from the channel currently being received. This is a process of selecting only one channel and stopping the operation. When this seek process is executed, the receivable information acquisition unit 13 acquires channel information and reception mode information related to one channel (receivable broadcast station channel) detected by the seek process.

  The predetermined timing is when the channel being received changes to a state in which reception is not possible. In this case, the receivable information acquisition unit 13 acquires channel information and reception mode information regarding the channel whose state has changed (the channel of the broadcasting station that has become unreceivable). However, if the vehicle is traveling in places where broadcast waves do not reach, such as tunnels and underground parking lots, it is excluded from the predetermined timing. Whether the vehicle is traveling in a tunnel or an underground parking lot can be detected by a navigation device (not shown), and the navigation device may notify the receivable information acquisition unit 13 of the detection result.

  The receivable information acquisition unit 13 may acquire the channel information and the reception mode information every fixed time (for example, every 10 minutes) or every fixed travel distance (for example, every 5 km). This may be performed in the background when the in-vehicle digital broadcast receiver is not selected as a source (for example, when a navigation device or a DVD player is selected as a source). In this case, for example, the receivable information acquisition unit 13 controls the tuner 2 to perform the scanning process at a predetermined timing, and obtains channel information and reception mode information regarding all the channels detected by the scanning process. get.

  When the channel information and the reception mode information are acquired by the receivable information acquisition unit 13, the information transmission unit 14 receives the channel information and the reception mode information, the current position information acquired by the current position information acquisition unit 10, Reception channel information is generated using the vehicle height information acquired by the vehicle height information acquisition unit 11 and transmitted to the server 200 via the communication network 300.

  FIG. 4 is a diagram illustrating an example of reception channel information transmitted from the information transmission unit 14 to the server 200. In the example illustrated in FIG. 4, the current position acquired by the current position information acquisition unit 10 is represented by latitude and longitude information. Also, the vehicle height information acquired by the vehicle height information acquisition unit 11 is 1.6 m, and the channel information acquired by the receivable information acquisition unit 13 is related to two broadcast stations that can be received at the current position. Broadcast station is shown. For one of the broadcasting stations, it is shown that both one-segment broadcasting and full-segment broadcasting can be received as reception mode information.

  The information reception unit 21 of the server 200 receives the reception channel information transmitted from the information transmission unit 14. The broadcast area information generation unit 22 generates broadcast area information as shown in FIG. 2 based on the reception channel information received by the information reception unit 21. That is, for each digital broadcast receivable area (mesh) corresponding to the current vehicle position (latitude / longitude information) included in the reception channel information, the channel information of the receivable broadcasting station and the one-segment broadcasting according to the vehicle height Broadcast area information including reception mode information indicating whether or not full-segment broadcasting can be received.

  The broadcast area information storage unit 23 stores the broadcast area information generated by the broadcast area information generation unit 22. The broadcast area information stored in the broadcast area information storage unit 23 is copied and stored in the broadcast area information storage unit 9 of the in-vehicle device 100 at an arbitrary timing.

  For example, the broadcast area information can be stored in the broadcast area information storage unit 9 by downloading the broadcast area information from the server 200 to the in-vehicle device 100 via the communication network 300. Alternatively, the broadcast area information stored in the broadcast area information storage unit 23 is downloaded to a personal computer (not shown) or the like, and the broadcast area information is copied from the personal computer to a recording medium such as a DVD or a semiconductor memory. Then, the broadcast area information may be transferred from the recording medium to the broadcast area information storage unit 9 of the in-vehicle device 100 and stored.

  FIG. 5 is a flowchart showing an operation example (broadcast area information generation method) of the broadcast area information generation system according to the present embodiment. The flowchart shown in FIG. 5 starts when the power of the in-vehicle digital broadcast receiving apparatus is turned on.

  First, the receivable information acquisition unit 13 determines whether or not a scan process has been executed in the tuner 2 (step S1). When the scan process is executed, the receivable information acquisition unit 13 acquires channel information and reception mode information regarding all channels (all channels of receivable broadcast stations) detected by the scan process (step S2). The current position information acquisition unit 10 acquires current position information from the current position detection device 20 (step S3). Furthermore, the vehicle height information acquisition unit 11 acquires vehicle height information from the system memory 30 (step S4).

  The information transmission unit 14 is acquired by the channel information and reception mode information acquired by the receivable information acquisition unit 13, the current position information acquired by the current position information acquisition unit 10, and the vehicle height information acquisition unit 11. 4 is generated using the vehicle height information and transmitted to the server 200 via the communication network 300 (step S5).

  If it is determined in step S1 that the scan process has not been executed, the receivable information acquisition unit 13 determines whether or not the seek process has been executed in the tuner 2 (step S6). When the seek process is executed, the receivable information acquisition unit 13 acquires channel information and reception mode information related to one channel (receivable broadcast station channel) detected by the seek process (step S7). Thereafter, the process proceeds to step S3, and the processes of steps S3 to S5 are executed.

  If it is determined in step S6 that the seek process has not been executed, the receivable information acquisition unit 13 determines whether or not the channel being received by the tuner 2 has changed to a state in which reception is not possible (step S8). . When the channel being received has changed to a state in which reception is not possible, the receivable information acquisition unit 13 acquires channel information and reception mode information regarding the channel in which the state has changed (a channel of a broadcast station that cannot be received) ( Step S9). Thereafter, the process proceeds to step S3, and the processes of steps S3 to S5 are executed.

  When the information transmission unit 14 transmits the reception channel information to the server 200 in step S5, the information reception unit 21 of the server 200 receives the reception channel information (step S11). Based on the reception channel information received by the information reception unit 21, the broadcast area information generation unit 22 displays a digital broadcast receivable area (mesh) corresponding to the current position included in the reception channel information. Broadcast area information as shown in FIG. 2 is generated (step S12) and stored in the broadcast area information storage unit 23 (step S13).

  In the in-vehicle device 100, when it is determined that the channel being received has not been changed to an unreceivable state after the processing in step S5 is completed and in step S8, the receivable information acquisition unit 13 Then, it is determined whether or not the power supply of the in-vehicle digital broadcast receiving apparatus is turned off (step S10). If the power of the in-vehicle digital broadcast receiver is not turned off, the process returns to step S1. On the other hand, when the power of the in-vehicle digital broadcast receiving apparatus is turned off, the process of the flowchart shown in FIG. 5 ends.

  The processes in steps S <b> 1 to S <b> 10 described above are repeatedly executed in the in-vehicle digital broadcast receiving device included in the plurality of vehicles during traveling, and reception channel information is transmitted from the plurality of vehicles to the server 200. In the server 200, broadcast area information is generated for each digital broadcast receivable area (mesh) based on reception channel information at each current position sent from a plurality of vehicles, and stored in the broadcast area information storage unit 23. Is done.

  And the broadcast area information memorize | stored in the broadcast area information storage part 23 is copied and memorize | stored in the broadcast area information memory | storage part 9 of the vehicle equipment 100 at the arbitrary timings which are not synchronized with the flowchart of FIG.

  FIG. 6 is a flowchart showing an operation example of the in-vehicle digital broadcast receiver according to the present embodiment (a reception channel switching method based on broadcast area information stored in the broadcast area information storage unit 9). Note that the flowchart shown in FIG. 6 starts when the on-vehicle digital broadcast receiver is turned on.

  First, the current position information acquisition unit 10 acquires the current position information of the vehicle detected by the current position detection device 20 (step S21). Then, the channel switching unit 12 reads the broadcast area information of the receivable area corresponding to the current position information acquired by the current position information acquisition unit 10 from the broadcast area information storage unit 9 (step S22). Moreover, the vehicle height information acquisition part 11 acquires the vehicle height information of the vehicle from the system memory 30 (step S23).

  Next, the channel switching unit 12 can receive full-segment broadcasting in the receivable area at the current position based on the broadcast area information read from the broadcast area information storage unit 9 in step S22 and the vehicle height information acquired in step S23. It is determined whether there is a broadcasting station (step S24). If there is no broadcast station capable of receiving full-segment broadcasting, the process proceeds to step S27.

  On the other hand, when there is a broadcasting station capable of receiving full-segment broadcasting, the channel switching unit 12 determines whether there is only one broadcasting station capable of receiving full-segment broadcasting (step S25). In the case of only one, the channel switching unit 12 controls the tuning of the tuner 2 so as to receive the full-segment broadcasting of the broadcasting station (step S26). Thereafter, the process proceeds to step S30.

  If there are multiple broadcast stations that can receive full-segment broadcasting in the receivable area at the current position, the channel switching unit 12 switches the reception channel from the currently receiving relay station to another relay station based on the broadcast area information. It is determined whether or not (step S27). Here, when the reception channel is switched from the relay station to another relay station, the channel switching unit 12 controls the tuning of the tuner 2 so as to receive the channel of the destination relay station (step S28).

  On the other hand, when the reception channel is switched from the relay station to the affiliated station (when No is determined in step S27), the channel switching unit 12 selects the tuner 2 so as to receive the channel of the source relay station. Is controlled (step S29). After the process of step S26, S28, or S29, the channel switching unit 12 determines whether or not the power of the in-vehicle digital broadcast receiving device is turned off (step S30). If the power is not turned off, the process returns to step S21. On the other hand, when the power is turned off, the process of the flowchart shown in FIG. 6 ends.

  As described above in detail, in the present embodiment, in the in-vehicle device 100, the current position information of the vehicle, the vehicle height information, the channel information of the broadcasting station that can be received or cannot be received at the current position, and the one-segment The reception mode information indicating whether the broadcast can be received or the full segment broadcast can be received is acquired and transmitted to the server 200. Whether or not the server 200 can receive the one-segment broadcasting according to the channel information of the receivable broadcasting station and the vehicle height for each receivable area of the digital broadcasting based on the information transmitted from the in-vehicle device 100. Reception mode information indicating whether full-segment broadcasting can be received is generated as broadcast area information.

  According to the present embodiment configured as described above, the generated broadcast area information includes information on which broadcast station channel can be received in the area corresponding to the current position of the vehicle, as well as one-segment broadcasting and full-segment broadcasting. It also includes information on which can be received. In addition, the information indicating whether or not reception is possible is generated in consideration of the installation position of the antenna. Therefore, this broadcast area information is stored in the broadcast area information storage unit 9 of the in-vehicle device 100, and the broadcast area information corresponding to the area of the current position is read out and used for switching the reception channel, so that the current position of the vehicle and the vehicle Depending on the height, it becomes possible to select an optimum receiving channel for receiving full-segment broadcasting as much as possible.

  In addition, although the said embodiment demonstrated the example which uses vehicle height information as antenna position information regarding the installation position of an antenna, this invention is not limited to this. For example, vehicle type information may be used instead of vehicle height information. In this case, the reception mode information included in the broadcast area information may be configured to indicate the reception possibility of the one-segment broadcasting / full-segment broadcasting for each vehicle type, but there is a demerit that the amount of information increases. Therefore, the broadcast area information remains the same as that shown in FIG. 2, and table information stored in association with vehicle type information and vehicle height information is prepared separately, and the vehicle type information acquired from the system memory 30 is converted into vehicle height information. It may be.

  Moreover, in the said embodiment, the reception mode information according to vehicle height is memorize | stored in the broadcast area information storage part 9, and it refers to reception mode information according to the vehicle height information which the vehicle height information acquisition part 11 acquires. Although an example of selecting a receivable channel according to the vehicle height information has been described, the present invention is not limited to this. For example, the broadcast area information storage unit 9 included in the vehicle-mounted device 100 of a certain vehicle type may store broadcast area information indicating only channels that can be received according to the vehicle height of the vehicle type. In this case, the reception mode information indicates only the reception possibility of the one-segment broadcasting / full-segment broadcasting.

  In the above embodiment, the information transmission unit 14 generates the reception channel information and transmits it to the server 200 in real time when the channel information and the reception mode information are acquired by the receivable information acquisition unit 13. However, the present invention is not limited to this. For example, the generated reception channel information may be temporarily stored in the memory of the in-vehicle device 100 and transmitted to the server 200 at a predetermined timing thereafter.

  For example, when the in-vehicle device 100 and the server 200 are connected using the communication function of a mobile terminal (not shown), the reception stored in the memory at the timing when the mobile terminal is connected to the in-vehicle device 100. It is possible to transmit the channel information to the server 200.

  In addition, each of the above-described embodiments is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 9 Broadcast area information storage part 10 Current position information acquisition part 11 Vehicle height information acquisition part 12 Channel switching part 13 Receivable information acquisition part 14 Information transmission part 21 Information reception part 22 Broadcast area information generation part 23 Broadcast area information storage part 100 Car-mounted 200 server

Claims (6)

A broadcast area information generating system used for switching a reception channel in an in-vehicle digital broadcast receiving device having a function of switching a reception channel as needed when a vehicle equipped with a current position detection device for detecting a current position is moved,
The in-vehicle digital broadcast receiving device includes a current position information acquisition unit that acquires current position information detected by the current position detection device;
An antenna position information acquisition unit for acquiring antenna position information related to an antenna installation position in the vehicle;
Receivable information acquisition that acquires channel information of a broadcasting station that can be received or cannot be received at the current position, and reception mode information that indicates whether the broadcasting station can receive one-segment broadcasting or full-segment broadcasting. And
Information for transmitting the current position information acquired by the current position information acquisition unit, the antenna position information acquired by the antenna position information acquisition unit, the channel information and the reception mode information acquired by the receivable information acquisition unit to the server A transmission unit,
The server can receive one-segment broadcasting according to channel information of receivable broadcasting stations and the installation position of the antenna for each receivable area of digital broadcasting based on the information transmitted by the information transmitting unit. A broadcast area information generating unit that generates reception mode information indicating whether or not full-segment broadcasting can be received, as broadcast area information;
A broadcast area information generation system comprising: a broadcast area information storage unit that stores broadcast area information generated by the broadcast area information generation unit. The receivable information acquisition unit is configured to detect all channels detected in the scan process when a scan process for detecting all receivable channels at the current position and creating a channel list is executed by a user operation of an operator. The broadcast area information generation system according to claim 1, wherein the channel information and the reception mode information are acquired. The receivable information acquisition unit automatically checks whether or not each channel is receivable while controlling the reception frequency to be switched one channel at a time from the channel currently being received by the operation of the operator by the user. When the seek process for selecting only one receivable channel detected first and stopping the operation is executed, the channel information and the reception mode information relating to the channel detected by the seek process are acquired. The broadcast area information generation system according to claim 1. The receivable information acquisition unit acquires the channel information and the reception mode information related to a channel whose state has changed when the channel being received changes to a state in which reception is not possible. Broadcast area information generation system described in 1. The broadcast area information generation system according to claim 1, wherein the receivable information acquisition unit acquires the channel information and the reception mode information at regular time intervals or at regular travel distances. A method for generating broadcast area information used for switching a reception channel in an in-vehicle digital broadcast reception device having a function of switching a reception channel as needed when a vehicle equipped with a current position detection device for detecting a current position is moved,
The receivable information acquisition unit of the above-mentioned in-vehicle digital broadcast receiver can receive channel information of a broadcasting station that can be received or cannot be received at the current position, and can receive one-segment broadcasting or full-segment broadcasting at the broadcasting station. A first step of obtaining reception mode information indicating whether or not
A second step in which a current position information acquisition unit of the in-vehicle digital broadcast receiving apparatus acquires current position information detected by the current position detection apparatus;
A third step in which the antenna position information acquisition unit of the in-vehicle digital broadcast receiving apparatus acquires antenna position information related to an installation position of the antenna in the vehicle;
The information transmitting unit of the in-vehicle digital broadcast receiving device is acquired by the current position information acquired by the current position information acquiring unit, the antenna position information acquired by the antenna position information acquiring unit, and the receivable information acquiring unit. A fourth step of transmitting the channel information and reception mode information to the server;
Based on the information transmitted by the information transmission unit, the broadcast area information generation unit of the server performs one segment according to the channel information of the receivable broadcast station and the installation position of the antenna for each receivable area of the digital broadcast. A broadcast area comprising: a fifth step of generating reception mode information indicating whether broadcast can be received or full-segment broadcasting can be received as broadcast area information and storing it in a broadcast area information storage unit Information generation method.

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