JP5533679B2 - Broadcast receiving apparatus, broadcast station information management apparatus, broadcast station information management system, and broadcast station information management method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that receives a digital broadcast broadcast in a local area, a broadcast station information management apparatus that manages information related to a broadcast station that transmits the digital broadcast, a broadcast station information management system, and a broadcast station information management method. About.

  Conventional terrestrial digital broadcasting in Japan has been based on the assumption that, for example, a program with the same content is broadcast in a wide area of one prefecture. FIG. 1 is a diagram illustrating an example of a reception area of a digital broadcast transmitted from a wide area broadcast station. In FIG. 1, circles centered on the wide area broadcast station A and the wide area broadcast station B indicate an example of a range in which digital broadcasts transmitted from the respective broadcast stations can be received. In this way, the wide area broadcast receiving area is a wide area of the prefecture or more. In such wide-area broadcasting, a one-segment broadcasting program having the same content as a normal high-definition broadcasting program is simultaneously broadcast (simultaneous broadcasting). Note that such a wide-area one-segment broadcast receiver is installed in many mobile phone devices, smartphones, and car navigation devices, and thus the diffusion rate is increasing.

  Under such circumstances, field one-segment broadcasting demonstration experiments are being conducted. This uses transmission power that is smaller than the transmission power in normal one-segment broadcasting. This transmission power is about 10 mW at maximum, and is classified into weak power and low power. The reception range in the case of weak power is about 1 m, and the reception range in the case of low power is about 500 m. Therefore, it is a local broadcast rather than a wide area.

  Area one segment broadcasting is used, for example, for broadcasting in a store or broadcasting in an event venue, and transmits information on products sold in the store, and information on events and performers in the event venue. That is, the area one segment broadcast is broadcast at a limited place, and the content of the broadcast is related to the place. This area one segment broadcast is transmitted using a so-called white space channel, which is not broadcasted by a wide-area broadcast station, from 13ch to 52ch of the UHF band as in the case of terrestrial digital broadcasting.

  FIG. 2 is a diagram illustrating an example of a reception range of a digital broadcast transmitted from an area one segment broadcast station. In FIG. 2, the reception range of the digital broadcast transmitted from the area one segment broadcast station AOB1 is an area having a diameter of 100 m centering on the broadcast station, and the reception range of the digital broadcast transmitted from the area one segment broadcast station AOB2 is This is an area with a diameter of 200 m centered on the broadcasting station.

  Since such area one segment broadcasts can only be received locally, in order to receive area one segment broadcast signals, a mobile terminal equipped with a receiver must be connected to the area where the area one segment broadcast is being performed. It needs to be moved to the vicinity. Comparing area one-segment broadcasting with normal wide-area broadcasting, in area one-segment broadcasting, the number of broadcasting stations increases or decreases depending on the opening or closing of stores, the presence of events, and the like. Also, it is not always broadcast. For this reason, the channel list for area one segment broadcasting needs to be updated at a certain frequency.

  Since area one-segment broadcasting is performed in a narrow area, it takes a lot of work to make the receiving terminal recognize which channel is being used in which area. . That is, it is necessary to go to an area where area one segment broadcasting is performed, and to perform a so-called channel scan for investigating whether or not all the channels of 13 to 52 ch in the UHF band are broadcast one by one. However, the channel scan surveys all channels and also takes time to survey each channel, so it takes time to prepare for receiving area one segment broadcasting. Sometimes it takes more than a minute.

  On the other hand, it is conceivable to acquire a channel list of area one segment broadcasting via a communication network. For example, a system has been proposed in which the current position of a portable wireless terminal is transmitted to a base station, the peripheral information is extracted on the base station side, and transmitted to the wireless terminal (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-122671

  Because there are many area one-segment broadcasting stations, using the communication network to acquire information for receiving area one-segment broadcasting is wasteful, such as area one-segment broadcasting in areas far from the current area. Data acquisition is likely to occur. For example, in the system using the base station described above, the same information may be transmitted every time the terminal accesses, the transmitted information is wasteful, takes a long time, and the amount of data to be transmitted Problems such as many are likely to occur.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique in which a receiving terminal side efficiently obtains information for receiving an area one segment broadcast that can be received in the vicinity.

  A broadcast receiver according to an aspect of the present invention is a general-purpose broadcast receiver, a broadcast station information holding unit that holds information about a broadcast station, a position detection unit that detects the position of the broadcast receiver, and a broadcast Of the information about the broadcast station held in the station information holding unit, an extraction unit that extracts information about a broadcast station that can be received within a range set around the position detected by the position detection unit, and a position detection unit A transmission unit that transmits the detected position and information about the broadcast station extracted by the extraction unit to a broadcast station information management apparatus that manages information about the broadcast station in an integrated manner, and a broadcast station that is transmitted by the transmission unit If there is a difference between the information and the information about the broadcast station that can be received within the range set around the position specified by the broadcast station information management device, update information for updating the difference, Release Comprising a receiver for receiving from the station information management device, based on the update information received by the receiving unit, an update unit for updating the information regarding the broadcasting stations held in the broadcast station information holding unit.

  Another aspect of the present invention is a broadcast station information management apparatus. This apparatus includes a broadcast station information holding unit that holds information relating to collected broadcast stations, and a broadcast that can be received from a general-purpose broadcast receiving apparatus within a range set around the position and the position of the apparatus. Information on a broadcast station that can be received within a range set around a position received by the reception unit, out of information on the broadcast station held in the reception unit that receives information on the station and the broadcast station information holding unit As a result of the comparison by the comparison unit comparing the information on the broadcast station received by the reception unit, the information on the broadcast station received by the reception unit, and the information on the broadcast station extracted by the extraction unit, there is a difference between the two In some cases, an update information generation unit that generates update information for updating the difference, and a transmission unit that transmits the update information generated by the update information generation unit to the broadcast receiving apparatus.

  Yet another aspect of the present invention is a broadcast station information management system. This broadcast station information management system is a broadcast station information management system that includes a general-purpose broadcast reception device and a broadcast station information management device that manages information related to the broadcast station in an integrated manner. Of the information about the broadcast station held in the first broadcast station information holding unit, the first position detection unit that holds information about the station, the position detection unit that detects the position of the broadcast receiver, and the position detection unit A first extraction unit that extracts information about broadcast stations that can be received within a range set around the detected position, a position detected by the position detection unit, and a broadcast station extracted by the first extraction unit; A first transmission unit that transmits information to the broadcast station information management device, information about the broadcast station transmitted by the first transmission unit, and a range set around a position specified by the broadcast station information management device Received When there is a difference between the information about possible broadcast stations, the first receiving unit that receives update information for updating the difference from the broadcast station information management device, and the update received by the first receiving unit And an update unit that updates information on the broadcast station held in the first broadcast station information holding unit based on the information. The broadcast station information management device can receive a second broadcast station information holding unit that holds information about the collected broadcast stations, a position of the device from the broadcast receiving device, and a range set around the position Receivable within the range set around the position received by the second receiving unit from the second receiving unit that receives information about the broadcasting station and the information about the broadcasting station held in the second broadcasting station information holding unit A second extraction unit for extracting information on a broadcast station, a comparison unit for comparing information on the broadcast station received by the second reception unit, and information on the broadcast station extracted by the second extraction unit, and a comparison unit If there is a difference between the two as a result of comparison, an update information generation unit that generates update information for updating the difference and the update information generated by the update information generation unit are transmitted to the broadcast receiving apparatus. Second transmission And, with a.

  Yet another aspect of the present invention is a broadcast station information management method. This method is based on a position detection step in which a portable broadcast receiving apparatus detects the position of its own apparatus, and a range set around the detected position with reference to information on a broadcasting station held by the broadcast receiving apparatus. The first extraction step for extracting information relating to broadcast stations that can be received within the network, the position detected by the position detection step, the information relating to the broadcast stations extracted in the first extraction step, and the information relating to the broadcast stations are integrated. A first transmission step for transmitting to a broadcast station information management device managed by the broadcast station, a broadcast station that can be received by the broadcast station information management device within a range set around the position from the broadcast reception device and the position of the device. A first reception step for receiving information, and a range set around the position received by the first reception step in the information about the broadcast station held by the broadcast station information management device A second extracting step for extracting information relating to the broadcast station that can be received in the step, a comparing step for comparing the information relating to the broadcast station received in the first receiving step and the information relating to the broadcast station extracted in the second extracting step; When there is a difference between the two as a result of the comparison in the comparison step, a second transmission step for transmitting update information for updating the difference to the broadcast receiving device, and the broadcast receiving device is a broadcasting station information management device A second receiving step for receiving the update information from the first update step, and an update step for updating the information on the broadcast station held by the broadcast receiving device based on the update information received in the second receiving step.

  Note that any combination of the above-described components and a representation of the present invention converted between a method, an apparatus, a system, a recording medium, a computer program, and the like are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the receiving terminal side can acquire efficiently the information for receiving the area one segment broadcast which can be received nearby.

It is a figure which shows an example of the receiving area of the digital broadcast sent from a wide area broadcasting station. It is a figure which shows an example of the reception range of the digital broadcast sent from an area one segment broadcast station. It is a figure which shows the structure of the broadcast station information management system which concerns on embodiment of this invention. It is a sequence diagram for demonstrating operation | movement of the broadcasting station information management system which concerns on embodiment of this invention. It is a figure which shows an example of the area one segment broadcast station information hold | maintained at the broadcast station information holding part of a broadcast receiver. FIG. 6 is a diagram showing a position distribution of the transmitter described in FIG. 5. It is a figure which shows the structure of TMCC information. It is a figure which shows an example of the area one segment broadcast station information hold | maintained at the broadcast station information holding part of a broadcast station information management apparatus. It is a figure which shows the position distribution of the transmitter described in FIG. It is a flowchart for demonstrating the comparison process of FIG.4 S21. It is a figure which shows the state after the update of the area one segment broadcast station information hold | maintained at the broadcast station information holding part of a broadcast receiver.

  FIG. 3 is a diagram showing a configuration of the broadcast station information management system 500 according to the embodiment of the present invention. The broadcast station information management system 500 includes a broadcast receiving apparatus 100 and a broadcast station information management apparatus 200. The broadcast receiving apparatus 100 and the broadcast station information management apparatus 200 are configured to be capable of bidirectional communication via a network 300 (for example, the Internet or a mobile phone network). Usually, there are a large number of broadcast receiving apparatuses 100. On the other hand, the broadcasting station information management apparatus 200 appears to be one when viewed from the outside, but there are cases in which the contents are many identical apparatuses.

  The broadcasting station terminal device 400 is provided in each broadcasting station that performs area one-segment broadcasting, and broadcast station information management device that transmits information on area one-segment broadcasting stations (hereinafter referred to as area one-segment broadcasting station information as appropriate) via the network 300. 200. Specific examples of area one segment broadcast station information will be described later. The broadcast station terminal device 400 may be integrated with the transmitter, or may be another device. The broadcast subject of the area one segment broadcast always registers the latest area one segment broadcast station information in the broadcast station information management apparatus 200 through the broadcast station terminal apparatus 400.

  The broadcast receiving apparatus 100 is a portable apparatus that can receive area one-segment broadcasting. Examples of the broadcast receiving device 100 include a mobile phone, a smartphone, a portable music player, a car navigation device, a game machine, a broadcast receiving dedicated device, and an electronic dictionary. In the following description, a mobile phone or a smartphone is assumed.

  The broadcast receiving apparatus 100 includes an antenna 11, a broadcast receiving unit 12, a position detection unit 13, a storage unit 14, a control unit 16, and a communication unit 19. The broadcast receiving unit 12 receives a digital broadcast radio wave via the antenna 11, demodulates a broadcast signal selected from the radio wave, and outputs the obtained digital stream to the control unit 16. The position detection unit 13 detects the current position of the broadcast receiving apparatus 100 and outputs it to the control unit 16. The position detection unit 13 can detect the current position of the broadcast receiving apparatus 100 using, for example, GPS. Furthermore, if a gyro sensor is used in addition to GPS, the current position can be detected with higher accuracy.

  The storage unit 14 includes a broadcast station information holding unit 15. The broadcast station information holding unit 15 holds area one segment broadcast station information. The area one segment broadcast station information includes at least identification information for uniquely identifying each area one segment broadcast station and version information. The identification information is managed by the broadcast station information management apparatus 200, and the identification information is given so that all area one-segment broadcast stations throughout the country become unique identification information. For example, the identification information may be a combination of a plurality of information such as a combination of a broadcast station position and frequency.

  The control unit 16 includes an extraction unit 17 and an update unit 18. These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and can be realized by a program loaded in the memory in terms of software, but here by their cooperation. Draw functional blocks. Therefore, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The extraction unit 17 can receive within the range set around the position of the broadcast receiving device 100 detected by the position detection unit 13 in the area one segment broadcast station information held in the broadcast station information holding unit 15. Extract area one segment broadcasting station information of area one segment broadcasting station. A specific example of the set range will be described later.

  The communication unit 19 is an interface for connecting to the network 300. In the present embodiment, the following information transmission / reception is mainly performed. The communication unit 19 transmits the position of the broadcast receiving device 100 detected by the position detection unit 13 and the area one segment broadcast station information extracted by the extraction unit 17 to the broadcast station information management device 200. At this time, only the identification information and the version information of the extracted area one segment broadcast station information may be transmitted. In addition, the communication unit 19 receives update information from the broadcast station information management apparatus 200 and outputs it to the control unit 16.

  The update information is set around area one segment broadcast station information transmitted from the communication unit 19 of the broadcast receiving apparatus 100 to the broadcast station information management apparatus 200 and the position specified by the broadcast station information management apparatus 200. If there is a difference between the area one segment broadcasting station information of the area one segment broadcasting stations that can be received within a certain range, the difference is updated. More specifically, information for matching the area one segment broadcast station information held in the broadcast station information holding unit 15 of the broadcast receiving apparatus 100 with the area one segment broadcast station information specified by the broadcast station information management apparatus 200. It is.

  The range set around the position of the broadcast receiving apparatus 100 by the extraction unit 17 of the broadcast receiving apparatus 100 and the range set around the position by the extracting unit 25 described later of the broadcast station information management apparatus 200 Are controlled to match or match. In addition, an algorithm for extracting an area one-segment broadcasting station that can be received within the range set around the position of the broadcast receiving device 100 by the extraction unit 17 of the broadcast receiving device 100, and a broadcast station information management device 200 described later. The algorithm for extracting the area one segment broadcasting station that can be received within the range set around the position by the extracting unit 25 is the same.

  The update unit 18 updates the area one segment broadcast station information held in the broadcast station information holding unit 15 based on the update information received by the communication unit 19. At that time, it is preferable that the update of the area one segment broadcast station information held in the broadcast station information holding unit 15 is started after all of the update information is normally received by the communication unit 19.

  Broadcast station information management apparatus 200 manages area one segment broadcast station information in an integrated manner. The broadcast station information management apparatus 200 is constituted by a server, for example. The broadcasting station information management apparatus 200 is installed in a unit in which an identifier for a wide-area broadcast is uniquely present, that is, generally in a country unit, but is installed in a smaller administrative unit (for example, a prefecture). Also good. In addition, a server that exists in each region may be integrated by a single server and displayed as one piece of information nationwide.

  The broadcast station information management apparatus 200 includes a communication unit 21, a storage unit 22, and a control unit 24. The storage unit 22 includes a broadcast station information holding unit 23. The broadcast station information holding unit 23 holds area one segment broadcast station information collected from the broadcast station terminal device 400 in the area to be managed. Hereinafter, in the present embodiment, the broadcast station information holding unit 23 always holds the latest information about the area one segment broadcast stations in all regions (for example, the whole country) that the broadcast station information management apparatus 200 should manage. It is assumed that It is also assumed that the latest information is always maintained for information related to area one-segment broadcasting, such as information on buildings that affect the radio wave conditions of area one-segment broadcasting and information on nearby frequency bands. And

  The communication unit 21 is an interface for connecting to the network 300. In the present embodiment, the following information transmission / reception is mainly performed. The communication unit 21 receives the area one segment broadcast station information of the area one segment broadcast station that can be received within the range set around the position of the broadcast receiver 100 and the position of the broadcast receiver 100 from the broadcast receiver 100. To do. In addition, update information generated by the communication unit 21 and an update information generation unit 27 described later is transmitted to the broadcast receiving apparatus 100.

  The control unit 24 includes an extraction unit 25, a comparison unit 26, and an update information generation unit 27. These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and can be realized by a program loaded in the memory in terms of software, but here by their cooperation. Draw functional blocks. Therefore, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The extraction unit 25 is an area that can be received within a range set around the position of the broadcast receiving device 100 received by the communication unit 21 in the area one segment broadcast station information held in the broadcast station information holding unit 23. Extract area one segment broadcasting station information of one segment broadcasting station. The comparison unit 26 compares the area one segment broadcast station information received by the communication unit 21 with the area one segment broadcast station information extracted by the extraction unit 25. The comparison unit 26 determines whether the area one segment broadcast station information received by the communication unit 21 and the area one segment broadcast station information extracted by the extraction unit 25 are the same based on the version information. it can. When there is a difference between the two as a result of the comparison by the comparison unit 26, the update information generation unit 27 generates update information for updating the difference.

  FIG. 4 is a sequence diagram for explaining the operation of broadcast station information management system 500 according to the embodiment of the present invention. This sequence diagram shows one update processing of area one segment broadcast station information held in the broadcast station information holding unit 15 of the broadcast receiving apparatus 100. The update process may be executed periodically (for example, once a day, once in an hour, etc.), may be executed due to a user operation, or the broadcast receiving apparatus 100 may be executed in advance. It may be executed due to the movement of the set distance. The broadcast receiving apparatus 100 and the broadcast station information management apparatus 200 execute the update process in cooperation while performing bidirectional communication via the network 300.

  FIG. 5 is a diagram illustrating an example of area one segment broadcast station information held in the broadcast station information holding unit 15 of the broadcast receiving apparatus 100. In the following description, the area one segment broadcast station information shown in FIG. 5 is held in the broadcast station information holding unit 15 of the broadcast receiving apparatus 100 in the initial state before the processing shown in the sequence diagram of FIG. Suppose that

  In the table shown in FIG. 5, each area is assigned one area one segment broadcasting station (hereinafter referred to as a transmitter as appropriate). “No”, “location”, “ID”, “version”, “reception area”, “physical CH”, “segment”, and “TMCC information” are assigned to each column as items.

  “No” is a serial number of the transmitter added to make the description of this specification easy to understand, and is an item that does not need to be provided in practice. “Position” indicates the position where the transmitter is installed in longitude and latitude. In FIG. 5, only “fixed” “position” is handled, but the transmitter may be installed in a moving body such as a car. “ID” is an identification code unique to all transmitters managed by the broadcast station information management apparatus 200 added to the transmitter, and a different identification code is assigned to each transmitter. FIG. 5 shows an example in which an identification code is generated by combining the latitude and longitude of the transmitter position and the transmitter number within the same latitude and longitude. Since the transmitter 1 and the transmitter 7 exist at the same position, it is recognized that they are different depending on “−1” and “−2” added at the end of the identification code. Note that the rules for generating the identification code are arbitrary, and other rules may be used.

  “Version” is a version of information described in each line. Each time the parameter affecting the reception of the broadcast described in the line changes, the value is incremented from 0x0000. This parameter change is applicable to any parameter, and the magnitude of the change does not matter. For example, even when there is no change in the transmitter itself, the reception area described below may change and “version” may change due to the construction of a high-rise building. In FIG. 5, “version” is described by a number, but may be described by the date and time when the parameter is applied.

  The “reception area” indicates an area where each area one segment broadcast can be received. A radius of 100 m indicates that reception is possible within a radius of 100 m centering on the position of the transmitter. In FIG. 5, the transmitter 6 is described as “* 1”. This indicates that the receiving area is not a circular area but a closed area in which a plurality of latitudes and longitudes are designated and connected. Transmitter 6 connects four points (135.0150 degrees east longitude, 35.00200 degrees north latitude), (135.0100 degrees east longitude, 35.00300 degrees north latitude), (135.0050 degrees east longitude, 35.00200 degrees north latitude) and (135.0100 degrees east longitude, 35.00000 degrees north latitude). The closed area is a receivable area.

  FIG. 6 is a diagram illustrating the position distribution of the transmitter described in FIG. In FIG. 6, the longitude of 0.0025 degrees and the latitude of 0.001 degrees are drawn to correspond to about 100 m in accordance with the actual situation near Japan. In FIG. 6, “No”, “position”, and “reception area” of each transmitter are depicted. It can be seen that the “reception area” of the transmitter 6 is not a circular area.

  Returning to FIG. “Physical CH” indicates the physical channel number of the UHF band in which each area one segment broadcast is performed. “Segment” is normally assigned segment 0. Currently, one-segment broadcasting is performed in segment 0. However, in consideration of future changes, segments other than 0 may be allocated as long as one segment broadcasting is possible in other segments. “TMCC information” is a transmission parameter to be included in TMCC for transmitting one-segment broadcasting.

  FIG. 7 is a diagram illustrating a configuration of TMCC information. The configuration of this TMCC information is defined in the standard “ARIB STD-B31” of terrestrial digital broadcasting defined by the Radio Industries and Businesses Association.

  FIG. 8 is a diagram showing an example of area one segment broadcast station information held in the broadcast station information holding unit 23 of the broadcast station information management apparatus 200. In the following description, in the initial state before the process shown in the sequence diagram of FIG. 4 is started, the area one segment broadcast station information shown in FIG. Suppose it is held.

  When FIG. 8 and FIG. 5 are compared, many places are common, but there are also different places. In the table of FIG. 8, portions different from FIG. 5 are underlined. Hereinafter, different parts will be described in order. The “version” and “reception area” of the transmitter 2 are different. The “version” and “segment” of the transmitter 3 are different. There is no transmitter 4. Note that the transmitter 4 is not originally displayed in the table of FIG. 8, but is drawn for convenience in order to make the description easy to understand. The “version” and “physical CH” of the transmitter 7 are different.

  The transmitter 9 is a transmitter which does not exist in FIG. 5, and all items are underlined. Since the transmitter 9 exists in the same position as the transmitters 1 and 7, the last end of “ID” is “−3” so that the transmitters 9 can be identified.

  FIG. 9 is a diagram illustrating a position distribution of the transmitter described in FIG. The description mode is the same as in FIG. Comparing FIG. 9 with FIG. 6, it can be seen that the “reception area” of the transmitter 2 has changed greatly. In FIG. 9, it can be seen that the transmitter 9 is present but the transmitter 4 is not present. In FIG. 6, the reverse relationship is obtained.

  Based on the above, the sequence diagram shown in FIG. 4 will be described. First, the position detection unit 13 of the broadcast receiving apparatus 100 detects the current position of the broadcast receiving apparatus 100 (S10). Next, the extraction unit 17 of the broadcast receiving apparatus 100 selects an area one segment broadcast station that can be received within a range set around the current position of the broadcast receiving apparatus 100 in the transmitter list in the broadcast station information holding unit 15. Search and extract from inside (S11). Next, the communication unit 19 of the broadcast receiving apparatus 100 transmits the current position of the broadcast receiving apparatus 100 and the “ID” and “version” of the transmitter extracted by the extracting unit 17 to the broadcast station information management apparatus 200 ( S12).

  For example, the point A in FIG. 6 is the current position of the broadcast receiving apparatus 100. Various shapes such as a circle and a rectangle are conceivable as a range set around the current position as the center or the center of gravity. In FIG. 6, a square region having a side of 100 m is considered. A region B drawn by a bold line is the region. Transmitters that can be received in this area B are transmitters 1, 4, and 7. In this case, the information transmitted from the broadcast receiving apparatus 100 to the broadcast station information management apparatus 200 in step S12 includes the current position of the broadcast receiving apparatus 100 (35.00100 degrees north latitude, 135.00250 degrees east longitude) and the transmitters 1, 4, and 7 respectively. "ID" and "version".

  Next, the extraction unit 25 of the broadcast station information management device 200 selects an area one-segment broadcast station that can be received within a range set based on the current position of the broadcast reception device 100 transmitted from the broadcast reception device 100. Search and extract from the transmitter list in the broadcast station information holding unit 23 (S20). Next, the comparison unit 26 compares the “ID” and “version” of the transmitter extracted by the extraction unit 25 with the “ID” and “version” of the transmitter transmitted from the broadcast receiving apparatus 100. (S21).

  Explaining in accordance with the above-described example, the extraction unit 25 extracts the current position (35.00100 degrees north latitude, 135.00250 degrees east longitude) of the broadcast receiving apparatus 100 transmitted from the broadcast receiving apparatus 100, and sets the point A in FIG. To do. This point A is the same position as the point A in FIG. Then, a range is set around the position, and area one segment broadcast station information of area one segment broadcast stations that can be received within the range is extracted. The range is determined by the same algorithm as the algorithm for determining the range set by the broadcast receiving apparatus 100. That is, the region B in FIG. 6 and the region B in FIG. 9 are the same. If the area B in FIG. 6 is a square, the area B in FIG. 9 is a similar square. If the area B in FIG. 6 is a circle, the area B in FIG. 9 is also a similar circle.

  The extraction unit 25 extracts transmitters that can be received in the range B of FIG. 9 from the table of FIG. As can be seen from FIG. 9, three transmitters 1, 2, and 7 are extracted. Next, the comparison unit 26 determines the “ID” and “version” of the transmitters 1, 2, and 7, and the “ID” and “version” of the transmitters 1, 4, and 7 transmitted from the broadcast receiving apparatus 100. Compare.

  First, regarding the transmitter 1, “version” transmitted from the broadcast receiving apparatus 100 is compared with “version” extracted in step S20. Both “versions” are 0x0003, and it can be determined that the parameters for broadcasting have not changed. That is, the comparison result for the transmitter 1 is the same. Note that the notation using the serial number such as the transmitter 1 is only used for the sake of simplification of description, and the actual comparison is performed by “ID”.

  Next, regarding the transmitter 2, the transmitter 2 does not exist in the information transmitted from the broadcast receiving apparatus 100, but the transmitter 2 exists in the information extracted in step S <b> 20. As can be seen from a comparison between FIG. 5 and FIG. 8, the reception area of the transmitter 2 has increased from a radius of 10 m to a radius of 300 m, so that the area B has entered the reception area of the transmitter 2. For this reason, the transmitter 2 is newly extracted in step S20. As described above, the comparison results are different for the transmitter 2.

  Next, regarding the transmitter 4, the transmitter 4 exists in the information transmitted from the broadcast receiving apparatus 100, but the transmitter 4 does not exist in the information extracted in step S20. This is because the transmitter 4 itself has disappeared, as can be seen by comparing FIG. 5 and FIG. In this way, the comparison results are different for the transmitter 4 as well.

  Next, regarding the transmitter 7, the transmitter 7 exists both in the information transmitted from the broadcast receiving apparatus 100 and in the information extracted in step S <b> 20. However, as can be seen by comparing FIG. 5 and FIG. 8, the “physical CH” is different. As a result, "version" is also different. The actual version to be compared is “version”. In this way, the comparison results are different for the transmitter 7 as well.

  The comparison processing in step S21 has been described based on a specific example, but will be described more generally below. FIG. 10 is a flowchart for explaining the comparison process in step S21 of FIG. First, the transmitter extracted by the extraction unit 17 of the broadcast receiving apparatus 100 in step S11 of FIG. 4 and the transmitter extracted by the extraction unit 25 of the broadcast station information management apparatus 200 in step S20 of FIG. Comparisons are made one by one (S30). When all the comparisons are finished (Y in S30), the comparison process in step S21 is finished.

  If all the comparisons have not been completed (N in S30), one next transmitter is picked up (S31). With reference to the “ID” of the transmitter, whether the transmitter with the “ID” exists in both the transmitter extracted in step S11 of FIG. 4 and the transmitter extracted in step S20 of FIG. It is determined whether or not (S32). If both are present (Y in S32), it is determined whether or not the “version” of both transmitters having the same “ID” are the same (S33). If they are the same (Y in S33), it is determined that the comparison results of the transmitters having the same “version” are the same, that is, it is determined that they have the same transmission parameters. Don't be. Then, it returns to step S30.

  When there is no transmitter with the same “ID” in step S32 (N in S32) and “version” is different in step S33 (N in S33), it is determined that the comparison results of the picked-up transmitters are different. The In this case, the information of the broadcast station information management apparatus 200 is prioritized (S34), and the transmitter is a target for generating the update information. Then, it returns to step S30. Note that a method in which priority is given to information having a newer “version” may be adopted. In this case, when the “version” transmitted from the broadcast receiving apparatus 100 is newer, the transmitter is not a generation target of the update information.

  Returning to FIG. 4, the update information generation unit 27 is different in information between the transmitter extracted by the extraction unit 17 of the broadcast receiving device 100 and the transmitter extracted by the extraction unit 25 of the broadcast station information management device 200. Is extracted and update information is generated (S22). In the example described above, the transmitter 1 is the same, and the transmitters 2, 4, and 7 are different. The update information generation unit 27 includes “ID”, “version”, “reception area” of the transmitter 2, “ID” of the transmitter 4, deletion information, and “ID”, “version”, “ Update information including “physical CH” is generated. The communication unit 21 transmits different information extracted by the update information generation unit 27 to the broadcast receiving apparatus 100 as update information (S23).

  The communication unit 19 of the broadcast receiving apparatus 100 receives the update information, and the update unit 18 updates the area one segment broadcast station information held in the broadcast station information holding unit 15 based on the update information (S13). . In the example described above, the transmitters 2, 4, and 7 are updated. Comparing FIG. 5 and FIG. 8, there are differences in addition to the transmitters 2, 4, and 7, but only the transmitter of the area one segment broadcast that can be received in the area B is updated.

  FIG. 11 is a diagram illustrating a state after the area one segment broadcast station information held in the broadcast station information holding unit 15 of the broadcast receiving apparatus 100 is updated. In the table of FIG. 11, the updated part is underlined. Specifically, “version” and “reception area” of the transmitter 2 and “version” and “physical CH” of the transmitter 7 are updated. Further, the transmitter 4 is deleted.

  Note that the updating unit 18 starts updating after the reception of all information transmitted from the broadcast station information management apparatus 200 is completed. This is because there is a possibility of data inconsistency when updated with halfway information. For example, it is assumed that the “physical CH” of the transmitters 1 and 2 installed in the same place are 30 ch and 31 ch, respectively, and they are switched. In the case where the information that the “physical CH” of the transmitter 1 is changed to 31ch can be acquired, but the information that the “physical CH” of the transmitter 2 is changed to 30ch cannot be acquired, the update unit 18 transmits the broadcast station. If the data in the information holding unit 15 is updated, the data is acquired from 30 ch, which is the same “physical CH” for the transmitters 1 and 2, and a contradiction occurs. In order to prevent this, the update unit 18 may start updating data after confirming that all data has been received normally. For example, a checksum or CRC (Cyclic Redundancy Check) is added to the data, or data length information is transmitted to the receiving side in advance, and all data is received on the receiving side. What is necessary is just to be able to confirm that the data has been transmitted.

  As described above, according to the present embodiment, broadcast receiving apparatus 100 can efficiently acquire information for receiving area one segment broadcast that can be received in the vicinity. That is, the current position of the broadcast receiving apparatus 100 and area one segment broadcast station information of area one segment broadcast that can be received within a range set based on the current position are transmitted to the broadcast station information management apparatus 200. The broadcast station information management device 200 receives area one segment broadcast station information of area one segment broadcast that can be received within a range set based on the current position of the received broadcast reception device 100, received area one segment broadcast station information, and And the difference is transmitted to the broadcast receiving apparatus 100 as update information. Thus, by updating only the area one segment broadcast station information in the vicinity of the current position of the broadcast receiving apparatus 100, the amount of data communication can be reduced. Moreover, the amount of data transmitted from the broadcast receiving apparatus 100 to the broadcast station information management apparatus 200 can be further reduced by using the version information.

  Further, by extracting the area one segment broadcast station information from each database using the same algorithm on the broadcast receiving apparatus 100 side and the broadcast station information management apparatus 200 side, synchronization of both databases can be ensured.

  The present invention has been described based on some embodiments. It is understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. By the way.

  100 broadcast receiving device, 13 position detecting unit, 15 broadcasting station information holding unit, 17 extracting unit, 18 updating unit, 200 broadcasting station information management device, 23 broadcasting station information holding unit, 25 extracting unit, 26 comparing unit, 27 updating information 500 generation station information management system.

Claims (8)

A general-purpose broadcast receiver,
A broadcasting station information holding unit that holds information about broadcasting stations;
A position detector for detecting the position of the broadcast receiver;
An extraction unit that extracts information on a broadcast station that can be received within a range set around a position detected by the position detection unit, among information on the broadcast station held in the broadcast station information holding unit,
A transmission unit that transmits the position detected by the position detection unit and the information about the broadcast station extracted by the extraction unit to a broadcast station information management apparatus that collectively manages information about the broadcast station;
When there is a difference between the information about the broadcast station transmitted by the transmission unit and the information about the broadcast station that can be received within the range set around the position specified by the broadcast station information management device A receiving unit for receiving update information for updating the difference from the broadcast station information management device;
Based on the update information received by the reception unit, an update unit that updates information about the broadcast station held in the broadcast station information holding unit;
A broadcast receiving apparatus comprising: The information regarding the broadcasting station includes identification information for uniquely identifying each broadcasting station, and version information,
The broadcast receiving apparatus according to claim 1, wherein the transmission unit transmits the identification information and the version information of information regarding the broadcast station extracted by the extraction unit.   An algorithm for extracting broadcast stations that can be received within the range set around the position by the extraction unit, and a broadcast that can be received within the range set around the position by the broadcast station information management device The broadcast receiving apparatus according to claim 1 or 2, wherein an algorithm for extracting a station is the same.   The update unit starts update of information on a broadcast station held in the broadcast station information holding unit after all of the update information is normally received by the receiving unit. 4. The broadcast receiving device according to any one of 3. A broadcasting station information holding unit that holds information about the collected broadcasting stations;
A receiving unit that receives information about a broadcast station that can be received within a range set around the position of the position of the apparatus from a portable broadcast receiving apparatus;
An extraction unit that extracts information on a broadcast station that can be received within a range set around a position received by the reception unit, among information on the broadcast station held in the broadcast station information holding unit,
A comparison unit that compares the information about the broadcast station received by the reception unit with the information about the broadcast station extracted by the extraction unit;
As a result of the comparison by the comparison unit, when there is a difference between them, an update information generation unit that generates update information for updating the difference;
A transmission unit that transmits the update information generated by the update information generation unit to the broadcast receiving device;
A broadcast station information management device comprising: The information regarding the broadcasting station includes identification information for uniquely identifying each broadcasting station, and version information,
The comparison unit may determine whether the information about the broadcast station received by the reception unit and the information about the broadcast station extracted by the extraction unit are the same based on the version information. Item 6. The broadcast station information management device according to Item 5. A broadcasting station information management system comprising a general-purpose broadcast receiving device and a broadcasting station information management device that comprehensively manages information about broadcasting stations,
The broadcast receiving device is:
A first broadcast station information holding unit for holding information about the broadcast station;
A position detector for detecting the position of the broadcast receiver;
A first extraction for extracting information related to a broadcast station that can be received within a range set around a position detected by the position detection unit from information related to the broadcast station held in the first broadcast station information holding unit. And
A first transmission unit that transmits the position detected by the position detection unit and the information about the broadcast station extracted by the first extraction unit to the broadcast station information management device;
There is a difference between the information about the broadcast station transmitted by the first transmission unit and the information about the broadcast station that can be received within a range set around the position specified by the broadcast station information management device A first receiving unit that receives update information for updating the difference from the broadcast station information management device;
An update unit for updating information on the broadcast station held in the first broadcast station information holding unit based on the update information received by the first reception unit;
The broadcasting station information management device includes:
A second broadcast station information holding unit for holding information about the collected broadcast stations;
A second receiving unit that receives information about the position of the apparatus from the broadcast receiving apparatus and a broadcast station that can be received within a range set around the position;
A second extraction for extracting information on a broadcast station that can be received within a range set around a position received by the second reception unit from information on the broadcast station held in the second broadcast station information holding unit. And
A comparison unit that compares the information about the broadcast station received by the second reception unit with the information about the broadcast station extracted by the second extraction unit;
As a result of the comparison by the comparison unit, when there is a difference between them, an update information generation unit that generates update information for updating the difference;
A broadcast station information management system, comprising: a second transmission unit that transmits the update information generated by the update information generation unit to the broadcast receiving device. A position detection step in which a portable broadcast receiving device detects the position of the device itself;
A first extracting step of referring to information about a broadcasting station held by the broadcast receiving device and extracting information about a broadcasting station that can be received within a range set around the detected position;
A first transmission step of transmitting the position detected by the position detection step and the information about the broadcast station extracted by the first extraction step to a broadcast station information management apparatus that comprehensively manages information about the broadcast station; ,
A first receiving step in which the broadcast station information management device receives the position of the device from the broadcast receiving device and information relating to a broadcast station that can be received within a range set around the position;
A second extraction step of extracting information about a broadcast station that can be received within a range set around the position received by the first reception step, among the information about the broadcast station held by the broadcast station information management device; ,
A comparison step of comparing the information about the broadcast station received by the first reception step with the information about the broadcast station extracted by the second extraction step;
As a result of the comparison in the comparison step, when there is a difference between the two, a second transmission step of transmitting update information for updating the difference to the broadcast receiving device;
A second receiving step in which the broadcast receiving device receives the update information from the broadcast station information management device;
An update step of updating information on the broadcast station held by the broadcast receiving device based on the update information received in the second receiving step;
A broadcast station information management method comprising:

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