JP2012049857A - Digital broadcast receiver, digital broadcast transmitter, digital broadcast transmission and reception system, digital broadcasting reception method, and digital broadcast transmission and reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver capable of automatic and sequential tuning and reception, without causing a user to perform tuning operation, when sequentially receiving a plurality of area one-segment broadcasts while traveling.SOLUTION: When a reception impossibility detecting unit 2101 detects that the broadcast of an area one-segment broadcast having been received becomes unreceivable, a reception control unit 2102, on the basis of frequency information of cooperative broadcast station information being information stored previously in a broadcast station information storage unit 2131 and relating to a broadcast station for broadcasting an area one-segment broadcast which becomes receivable next, controls a tuner (reception unit) 201 to receive the broadcast of the area one-segment broadcast.

Description

  The present invention relates to digital broadcast transmission technology and reception technology, and more particularly to a digital broadcast reception device, a digital broadcast transmission device, a digital broadcast transmission / reception system, a digital broadcast reception method, and a digital broadcast transmission / reception method.

  The broadcasting target area of terrestrial digital broadcasting currently being broadcasted is a relatively wide area in which the prefectural area is the main division unit, as is the case with conventional terrestrial analog broadcasting.

  In addition, in terrestrial digital broadcasting operated in Japan, in addition to normal broadband broadcasting, narrow-band broadcasting mainly intended for portable receiving terminals called one-segment broadcasting is broadcast. This one-segment broadcasting is simultaneously broadcast at the same broadcasting frequency as the broadband broadcasting. Broadband broadcasting and one-segment broadcasting that are simultaneously broadcast at the same broadcast frequency are basically operated by so-called simulcast broadcasting that broadcasts the same content at the same time.

  A demonstration test is currently being conducted to limit the broadcasting area of the one-segment broadcasting to a very narrow range, and to use it for broadcasting content other than broadband broadcasting instead of simulcast broadcasting. This one-segment broadcasting in which the broadcasting area is limited to an extremely narrow range is hereinafter referred to as area one-segment broadcasting.

  This area one seg broadcasting is a broadcast operated with extremely small transmission power called weak power or low power. Broadcasting with weak power has a receivable area of, for example, a radius of about 3 m, and broadcasting with low power has a receivable area of, for example, a radius of about 100 m. Accordingly, in area one-segment broadcasting, for example, the receivable area (broadcast target area) can be limited to the vicinity of the store or the event venue. In this way, Area One Seg Broadcasting deliberately limits the receivable area, so that limited information in the receivable area is limited to users in the receivable area by contents such as video, audio or data broadcasting. There is an advantage that it can be provided accurately. The limited information is, for example, information on products sold at the store, information on events at the event venue, and performers.

  As a conventional technique related to area one-segment broadcasting, for example, there is Patent Document 1.

JP 2010-081133 A

  However, in the case of receiving area one-segment broadcasting while moving by a digital broadcast receiving device (hereinafter, simply referred to as a receiving device) provided in a vehicle or the like on which the user is traveling, the following problems are encountered in the prior art: was there.

  That is, the receivable area of the area one-segment broadcasting is a very narrow area as described above. Therefore, when a user views an area one seg broadcast while moving, the one area one seg broadcast can be viewed only during a period during which the moving vehicle (receiving device) stays within the one one seg broadcast receivable area. It becomes.

  For example, considering a case where an area one-segment broadcasting with a radius of 100 m is viewed while moving at a speed of 40 km / h, the maximum viewable time is 200 m corresponding to the diameter of the receivable area at the longest. The period is about 18 seconds.

  In the above situation, consider a case where a user sequentially views a plurality of area one-segment broadcasts while moving.

  In this case, in order to move outside the reception area of the area one seg broadcast that the user is currently viewing and watch the next new area one seg broadcast, the user is viewing the channel on which the new area one seg broadcast is being broadcast ( Re-tuning to (frequency) is required.

  However, since the conventional receiving apparatus does not have means for presenting a new area one-segment broadcasting channel to the user, the user must set a channel by trial and error or search for a receivable channel by channel search. I had to. However, since the time during which the area one seg broadcasting can be viewed is short as described above, the area one seg broadcasting that should have been able to be received during such operations is outside the receivable area. It was possible that it would come out.

  The present invention has been made to solve the above-described problems, and its purpose is to allow a user to perform a channel selection operation when sequentially receiving a plurality of area one-segment broadcasting while moving. It is an object of the present invention to provide a digital broadcast receiving apparatus, a digital broadcast transmitting apparatus, a digital broadcast transmitting / receiving system, a digital broadcast receiving method, and a digital broadcast transmitting / receiving method capable of automatically selecting and receiving a channel.

In order to solve the above problems, the present invention provides the following apparatus, system, and method: (1) A general-purpose digital broadcast receiving apparatus (100) that receives a plurality of digital broadcasts;
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station One piece of linked broadcasting station information including second identification information for identifying a second broadcasting station that broadcasts the digital broadcast that can be received next, and broadcast frequency information that the second broadcasting station uses for broadcasting; A broadcasting station information storage unit (2131) in which one or more broadcasting station information associated with the
A receiving unit (201) for receiving digital broadcasting by the first broadcasting station;
A reception impossibility detection unit (2101) for detecting that the digital broadcast by the first broadcasting station has become unreceivable;
If the reception impossibility detection unit detects reception impossibility, the one or more current broadcast station information stored in the broadcast station information storage unit based on the received first identification information of the first broadcast station The current broadcast station information of the first broadcast station that has been received is identified, and the second broadcast is based on the broadcast frequency information included in the associated broadcast station information corresponding to the identified current broadcast station information. The receiving unit is controlled to receive a digital broadcast by the station, and a second broadcast station that broadcasts the received digital broadcast is set as a new first broadcast station, and a second identification of the second broadcast station is performed. A control unit (2102) for setting information as first identification information of the new first broadcasting station;
A digital broadcast receiver characterized by comprising:
(2) A portable digital broadcast receiver (100) for receiving a plurality of digital broadcasts,
A position detection unit (215) for detecting the position where the digital broadcast receiving apparatus is present at any time; and
A movement path recognition unit (2103) for recognizing the movement path of the digital broadcast receiving device from the transition of the position detected at any time by the position detection unit;
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station The second identification information for identifying the second broadcast station that broadcasts the digital broadcast that can be received next, the broadcast frequency information that the second broadcast station uses for broadcasting, and the position of the second broadcast station Broadcast in which at least one broadcast station information associated with information and one or more linked broadcast station information including receivable area information indicating an area in which the broadcast of the second broadcast station can be received is stored in advance Station information storage unit (2131),
A receiving unit (201) for receiving digital broadcasting by the first broadcasting station;
A reception impossibility detection unit (2101) for detecting that the digital broadcast by the first broadcasting station has become unreceivable;
When the receiving unit receives the digital broadcast from the first broadcasting station, the one or more current stations stored in the broadcasting station information storage unit are based on the received first identification information of the first broadcasting station. From the broadcast station information, specify the received current broadcast station information of the first broadcast station,
If there is one linked broadcast station information corresponding to the identified current broadcast station information, select the linked broadcast station information,
When there are a plurality of cooperative broadcast station information corresponding to the identified current broadcast station information, the position information of the second broadcast station and the receivable area information respectively included in the plurality of cooperative broadcast station information, and the movement route On the basis of the information indicating the selected broadcasting station information of the second broadcasting station that is present in the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control unit (2102) as identification information of
A digital broadcast receiver characterized by comprising:
(3) A digital broadcast transmission / reception system including a plurality of digital broadcast transmission devices (300) and a portable digital broadcast reception device (100) for receiving digital broadcasts by the plurality of digital broadcast transmission devices,
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. Transmission unit (401, 402, 404, 405) to broadcast,
The digital broadcast receiving apparatus includes:
A receiver for receiving a digital broadcast by the first digital broadcast transmitter;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
When the reception failure detection unit detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. And a control unit that uses the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device.
A digital broadcast transmission / reception system characterized by that.
(4) A digital broadcast transmission device for broadcasting a digital broadcast for a portable digital broadcast reception device,
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. A digital broadcast transmission apparatus comprising a transmission unit for broadcasting.
(5) A portable digital broadcast receiver that receives a plurality of digital broadcasts,
The first digital broadcast transmitting apparatus includes broadcast frequency information used for broadcasting by the second digital broadcast transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcast receiving apparatus moves. A receiving unit for receiving digital broadcasts including information on two linked broadcast stations,
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
When the reception failure detection unit detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. In addition, a control unit that sets the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device,
A digital broadcast receiver characterized by comprising:
(6) a plurality of digital broadcast transmitters for broadcasting digital broadcasts;
A digital broadcast transmission / reception system including a portable digital broadcast reception device that receives a digital broadcast by the plurality of digital broadcast transmission devices;
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a transmission unit that broadcasts the digital broadcast including one or more linked broadcast station information including receivable area information indicating an area where the second digital broadcast transmission apparatus can receive the broadcast,
The digital broadcast receiving apparatus includes:
A position detection unit for detecting a position where the digital broadcast receiving apparatus exists, as needed;
A movement path recognition unit for recognizing the movement path of the digital broadcast receiving device from the transition of the position detected at any time by the position detection unit;
A receiver for receiving a digital broadcast by the first digital broadcast transmitter;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives a digital broadcast by the first digital broadcast transmission device, obtains the one or more linked broadcast station information included in the received digital broadcast,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. Having a control unit as identification information of
A digital broadcast transmission / reception system characterized by that.
(7) A digital broadcast transmission device that broadcasts a digital broadcast for a portable digital broadcast reception device,
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a digital broadcast transmitter including at least one cooperative broadcast station information including receivable area information indicating a receivable area information indicating a receivable area of the second digital broadcast transmitting apparatus. Broadcast transmission device.
(8) A portable digital broadcast receiver that receives a plurality of digital broadcasts,
A position detection unit for detecting the presence position of the digital broadcast receiver as needed;
A movement path recognition unit for recognizing a movement path of the digital broadcast receiving device from the transition of the existence position detected at any time by the position detection unit;
Broadcast frequency information used for broadcast by the second digital broadcast transmission device that broadcasts the digital broadcast that is received next by the first digital broadcast transmission device as the digital broadcast reception device moves, the first Digital broadcasting that includes one or more pieces of linked broadcasting station information including location information of the digital broadcasting transmitting device 2 and receivable region information indicating a region where the broadcasting of the second digital broadcasting transmitting device can be received. A receiving unit for receiving;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives a digital broadcast by the first digital broadcast transmission device, obtains the one or more linked broadcast station information included in the received digital broadcast,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control unit to be identification information of
A digital broadcast receiver characterized by comprising:
(9) A digital broadcast receiving method used for a portable digital broadcast receiving apparatus that receives a plurality of digital broadcasts,
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station One piece of linked broadcasting station information including second identification information for identifying a second broadcasting station that broadcasts the digital broadcast that can be received next, and broadcast frequency information that the second broadcasting station uses for broadcasting; A broadcast station information storage step for storing one or more broadcast station information associated with
Receiving a digital broadcast by the first broadcast station;
An unreceivable detection step of detecting that the digital broadcast by the first broadcasting station is unreceivable;
If the reception failure detection step detects reception failure, the one or more current broadcast station information stored in the broadcast station information storage unit based on the first identification information of the first broadcast station that has been received. The current broadcast station information of the first broadcast station that has been received is identified, and the second broadcast is based on the broadcast frequency information included in the associated broadcast station information corresponding to the identified current broadcast station information. The reception step is controlled so as to receive the digital broadcast by the station, and the second broadcast station that broadcasts the received digital broadcast is set as a new first broadcast station, and the second identification of the second broadcast station is performed. A control step of setting information as first identification information of the new first broadcasting station;
A digital broadcast receiving method comprising:
(10) A digital broadcast receiving method used in a portable digital broadcast receiving apparatus that receives a plurality of digital broadcasts,
A position detecting step for detecting a position where the digital broadcast receiving apparatus exists, as needed;
A movement path recognition step for recognizing a movement path of the digital broadcast receiver from the transition of the position detected at any time in the position detection step;
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station The second identification information for identifying the second broadcast station that broadcasts the digital broadcast that can be received next, the broadcast frequency information that the second broadcast station uses for broadcasting, and the position of the second broadcast station Broadcast station information that stores in advance one or more broadcast station information that associates information and one or more linked broadcast station information including receivable area information indicating an area in which broadcast of the second broadcast station can be received. A memory step;
Receiving a digital broadcast by the first broadcast station;
An unreceivable detection step of detecting that the digital broadcast by the first broadcasting station is unreceivable;
When the receiving step receives a digital broadcast by the first broadcasting station, the one or more current stations stored in the broadcasting station information storage unit based on the received first identification information of the first broadcasting station. From the broadcast station information, specify the received current broadcast station information of the first broadcast station,
If there is one linked broadcast station information corresponding to the identified current broadcast station information, select the linked broadcast station information,
When there are a plurality of cooperative broadcast station information corresponding to the identified current broadcast station information, the position information of the second broadcast station and the receivable area information respectively included in the plurality of cooperative broadcast station information, and the movement route On the basis of the information indicating the selected broadcasting station information of the second broadcasting station that is present in the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception failure detection unit detects reception failure, the reception step is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control step for identifying information of
A digital broadcast receiving method comprising:
(11) A digital broadcast transmission / reception method using a plurality of digital broadcast transmission devices that broadcast digital broadcasts and a portable digital broadcast reception device that receives digital broadcasts by the plurality of digital broadcast transmission devices,
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. A transmission step for broadcasting
The digital broadcast receiving apparatus includes:
Receiving a digital broadcast by the first digital broadcast transmitter;
A reception additional detection step for detecting that the digital broadcast by the first digital broadcast transmission device is not received;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
If the reception failure detection step detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. And a control step of using the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device.
A digital broadcast transmission / reception method.
(12) A digital broadcast transmission / reception method using a plurality of digital broadcast transmitters for broadcasting digital broadcasts and a portable digital broadcast receiver for receiving digital broadcasts by the plurality of digital broadcast transmitters,
The first digital broadcast receiver among the plurality of digital broadcast transmitters is:
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a transmission step of broadcasting by including one or more cooperative broadcasting station information including receivable area information indicating an area where the second digital broadcast transmitting apparatus can receive a broadcast, in a digital broadcast,
The digital broadcast receiving apparatus includes:
A position detecting step for detecting the presence position of the digital broadcast receiving device as needed;
A movement path recognition step for recognizing a movement path of the digital broadcast receiver from the transition of the existing position detected at any time in the position detection step;
Receiving a digital broadcast by the first digital broadcast transmitter;
A reception failure detection step of detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the reception step receives a digital broadcast by the first digital broadcast transmission device, the one or more linked broadcast station information included in the received digital broadcast is acquired,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception failure detection step detects reception failure, the reception unit is controlled to receive a digital broadcast from the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. Including a control step as identification information of
A digital broadcast transmission / reception method.

  According to the present invention, when a plurality of area one-segment broadcasts are sequentially received while moving, it is possible to automatically and sequentially select and receive without causing the user to perform a channel selection operation.

It is a figure explaining the structure of the digital broadcast receiver which concerns on the Example of this invention. It is a figure which shows embodiment of area one-segment broadcasting. It is a figure which shows embodiment of area one-segment broadcasting. It is a figure explaining the structure of broadcast station information. It is a figure explaining TMCC. It is a flowchart explaining the flow of operation | movement of 1st Example. It is a figure which shows embodiment of area one-segment broadcasting. It is a figure explaining the structure of broadcast station information. It is a flowchart explaining the flow of operation | movement of 2nd Example. It is a figure explaining the structure of the digital broadcast transmitter which concerns on the Example of this invention. It is the figure which showed the structure of NIT. It is a figure explaining a system management descriptor. It is a figure explaining the specific example described in the additional identifier information field. It is an example expressing a complex receivable area.

[Internal configuration of digital broadcast receiver]
FIG. 1 is a block diagram for explaining a configuration of a digital broadcast receiving apparatus 100 according to an embodiment of the present invention.

  A tuner (reception unit) 201 selects and receives a broadcast wave having a predetermined frequency set by a CPU 208 (to be described later) from among the digital broadcast waves supplied from the antenna 200, and demodulates the received broadcast wave to digitally. Generate stream data.

  Further, the tuner 201 measures the radio wave intensity and C / N ratio of a broadcast wave having a predetermined frequency to be set and detects whether it can be received, the segment configuration of the received broadcast wave, the modulation method for each segment, It has a function of reading TMCC (Transmission and Multiplexing Configuration Control) information indicating transmission parameters such as coding rate.

  The tuner 201 may be capable of receiving only one-segment broadcast wave among digital broadcast waves, or can receive both wide-band broadcast (also referred to as full-segment broadcast or 12-segment broadcast) and one-segment broadcast wave. It may be a thing.

  When the digital stream supplied from the tuner 201 is scrambled, the descrambler 202 cancels the scramble. Scramble is mainly used for pay broadcasting in full segment broadcasting. In the case of one-segment broadcasting, since scramble operation is not currently performed, the digital stream of one-segment broadcasting passes through without being processed by the descrambler 202. Therefore, this descrambler 202 is not currently required for a receiver dedicated to one-segment broadcasting.

  The demultiplexer 203 separates compressed video data and audio data from the digital stream supplied from the descrambler 202 and temporarily stores them in the demultiplexer RAM 207.

  The video decoder 204 and the audio decoder 205 respectively read and decode (decompress) the compressed video data and audio data stored in the demultiplexing RAM 206, output the video data to the graphics 206, and the audio data remains as audio. Output to the outside as a signal.

  The graphics 206 generates graphics data for use in a GUI (Graphics User Interface) or the like according to the situation.

  In addition, the graphics 206 outputs the supplied video data or synthesized video data obtained by superimposing the video data and the graphics data to the outside as a video signal.

  The CPU 210 is connected to each block from the tuner 201 to the graphics 206 described above by a bus 217, and controls each block via the bus 217.

  The bus 217 further includes a ROM 211 that stores program data for causing the CPU to execute various functions, a RAM 212 that temporarily stores various variables used by the CPU, and a state of the device immediately before the power is turned off. A flash memory 213 for storing information to be shown, an RTC 214 that is a built-in clock, a user interface 216, and the like are also connected.

  The demultiplexer 203 is information used for channel selection processing, EPG (Electronic Program Guide) display, etc., in addition to separating video data and audio data from a supplied data stream. Additional data such as (Service Information) / PSI (Program Specific Information) and a data carousel used for displaying data broadcast contents are also separated and temporarily stored in the demultiplexing RAM 207.

  The CPU 210 reads the temporarily stored additional data and realizes various functions. For example, if the read additional data is a data carousel, a BML document is extracted from the data carousel, and data broadcasting content including a GUI or the like is displayed using graphics 206 according to the contents described in the BML document. Output to the outside as a signal. If the read additional data is SI, program information included in the SI is extracted, an EPG is generated using the graphics 206 according to the program information, and the EPG is output to the outside as a video signal. .

  The CPU 210 also has functions as a reception impossibility detection unit 2101, a reception control unit 2102, and a movement path recognition unit 2103, which are the main parts of the present invention. The movement path recognition unit 2103 is a block that is used in a second embodiment to be described later and is not used in the first embodiment.

  The flash memory 211 is a non-volatile memory, and can store stored information without power supply. The flash memory 211 is provided with a broadcast station information storage unit 2131 which is an area for storing broadcast station information used in each embodiment according to the present invention. Detailed description regarding the broadcast station information will be described later. The broadcast station information storage unit 2131 is a block that is used in first and second embodiments to be described later and is not used in the third embodiment.

  The RTC 214 may time itself by a crystal oscillator, or may measure time based on a TOT (Time Offset Table) included in SI obtained from digital broadcasting. In the latter case, the TOT is extracted from the SI by the CPU 210 and set in the RTC 214. In any case, the CPU 210 can acquire the current time information from the RTC 214 as needed.

  The user interface 216 detects a user operation performed by a remote controller (not shown), a button (not shown) attached to the main body, or the like.

  A GPS (Global Positioning System) 215 detects the current position of the digital broadcast receiving apparatus 100. Although an example in which GPS is used for detection of the current position is shown in this description, the current position may be detected by combining other devices such as a vehicle speed pulse and a gyro instead of GPS.

  The flash memory 213 is also provided with a map data storage unit 2132, and the map data is stored in the map data storage unit 2132. Then, based on the current position data detected by the GPS 215, the CPU 210 reads out map data of the area around the current position from the map data storage unit 2132. Next, the CPU 210 uses the graphics 207 to generate a map of the area around the current position where the current position is shown as a spot, and displays the map on a display unit connected inside or outside the apparatus. That is, this corresponds to the function of displaying the current position in the car navigation system.

  Note that the above-described broadcast station information and map data are not limited to the flash memory 213 and may be stored in any memory as long as it is a non-volatile memory such as a hard disk.

  Moreover, you may memorize | store broadcast station information and map data in a separate non-volatile memory.

The GPS 215 and the map data storage unit 2132 are blocks that are used in a second embodiment to be described later and are not used in the first embodiment.
[Area One Seg Broadcasting]
FIG. 2 is a diagram illustrating an embodiment of area one-segment broadcasting. In the figure, the area one-segment broadcasting station AOB1 faces the road. A receivable area of the area one seg broadcasting broadcast by the area one seg broadcasting station AOB1 is an area having a radius of 100 m.

  At this time, a case is considered in which the digital broadcast receiving device 100 provided in the vehicle traveling at a speed of 40 km / h from the left side to the right side of the road receives the area one-segment broadcasting station AOB1. In this case, the time that the digital broadcast receiving apparatus can receive the broadcast of the area one-segment broadcasting station AOB1 and allow the user to view it is about 18 seconds, which is a period of moving 200 m corresponding to the diameter of the receivable area at most. It is.

  FIG. 3 is a diagram showing a first embodiment of area one-segment broadcasting for explaining the operation of the first embodiment of the present invention.

  In this figure, in addition to the area one seg broadcasting station AOB1 shown in FIG. 2, there are area one seg broadcasting stations AOB2, 3 having the same receivable area as the area one seg broadcasting station AOB1, and these area one seg broadcasting stations AOB1, 2 , 3 are arranged along the road at intervals of about 200 m.

In the present invention, in a situation where a plurality of area one-segment broadcasting stations are arranged along the road in this way, the vehicle equipped with the digital broadcast receiving device 100 is directed from the left side to the right side of the road, for example, as in FIG. When traveling, it is possible to automatically and sequentially receive each broadcast broadcast by the area one-segment broadcasting stations AOB3, 2, and 1 without causing the user to perform a channel selection operation. Is.
[Broadcasting station information]
FIG. 4 is a diagram for explaining the configuration of the first broadcast station information used in the first embodiment of the present invention to realize the above-described automatic channel selection reception operation.

  Each piece of information in one area surrounded by a thick line in FIG. 4 constitutes broadcasting station information for one area one seg broadcasting station. FIG. 4 shows a list of three broadcasting station information (hereinafter referred to as broadcasting station information list) corresponding to the area one-segment broadcasting stations AOB1, 2, and 3. The order of description in the broadcast station information list is area one-segment broadcast station AOB3, 2, 1 from top to bottom.

  Each broadcast station information is classified into current broadcast station information and cooperative broadcast station information. The current broadcast station information is information related to a broadcast station that is a target of channel selection, which is used by the digital broadcast receiving apparatus 100 to select a channel. The cooperative broadcasting station information is information related to a broadcasting station that broadcasts the area one-segment broadcasting that can be received next as the digital broadcasting receiving apparatus 100 moves while receiving the broadcasting of the broadcasting station indicated by the current broadcasting station information. is there.

  The current broadcast station information and the linked broadcast station information together with information indicating the position where the broadcast station exists (position information), information indicating the physical channel used by the broadcast station for broadcasting (frequency information), It includes information (name information) indicating the name of the broadcasting station and information (range information) indicating a receivable area of the broadcast broadcasted by the broadcasting station.

  Hereinafter, the broadcast station information will be described more specifically.

  For example, there is an area one seg broadcasting station named AOB3 that broadcasts an area one seg broadcast at a frequency of 30 ch at the position of east longitude aaa north latitude bbb in the uppermost thick line, and after receiving the broadcast of this broadcast station, An area one seg broadcasting station that broadcasts a receivable area one seg broadcast indicates a broadcast station named AOB2 that broadcasts an area one seg broadcast at a frequency of 31 ch at a position of north latitude ccc north latitude ddd.

  In order to simplify the description, an example is described in which only frequency information is described as information indicating a broadcast wave. However, actually, various information described in the TMCC information shown in FIG. 5 is described as information indicating a broadcast wave. In addition, the information to be set in the tuner 201 for channel selection is also described as setting only channel (frequency) information, but in practice, various information described in the TMCC information is set.

  Similarly, an example is described in which a radius is described as information indicating a receivable area. However, the coverage area may not be a perfect circle due to the influence of surrounding terrain and buildings. Therefore, in practice, it is necessary to indicate a more complicated receivable area by a numerical value.

  In the embodiment of FIG. 4, an example is shown in which broadcast stations with a radius of 100 m are all receivable areas are arranged, but it is of course possible to have broadcast stations with different receivable areas (that is, different transmission powers).

  Further, the name information is not a broadcast station name but may be any information as long as the information can uniquely identify the broadcast station.

  For example, the broadcast station information is acquired from an external data input unit that inputs data from a communication line, a card memory, an optical disk, or the like (not shown), and stored in the broadcast station information storage unit 2131 in advance, or the digital broadcast receiving apparatus 100 A form stored in advance in the broadcast station information storage unit 2131 at the time of manufacture is conceivable. This form will be described later as Examples 1 and 2.

Alternatively, the area one seg broadcasting station may transmit the broadcasting station information included in the broadcasting wave, and the digital broadcasting receiving device may receive the broadcasting wave and acquire the broadcasting station information. This form will be described later as Example 3.
[First embodiment]
The first embodiment of the present invention will be described below.

  The first embodiment is an example where the broadcast station information list is stored in the broadcast station information storage unit 2131 in advance.

  In the first embodiment, only one piece of linked broadcast station information corresponding to the current broadcast station information in the broadcast station information is described. A feature is that the operation is realized using only the name information and the frequency information of the broadcast station information.

  Hereinafter, it demonstrates in detail using FIG.

  In FIG. 3, a case is considered where the digital broadcast receiving device 100 provided in a vehicle traveling from the left side to the right side of the road sequentially receives the broadcasts of the area one-segment broadcasting stations AOB1, 2, and 3.

  First, after the digital broadcast receiving apparatus 100 passes the point of T23, the situation is that the broadcast of the area one-segment broadcasting station AOB3 is selected and received by manual channel selection by the user, automatic channel selection of the digital broadcast receiving apparatus 100, or the like. explain.

  At this time, the reception control unit 2102 of the CPU 210 receives the name (identification information) of the broadcasting station that broadcasts the broadcast from, for example, NIT (Network Information Table), which is additional information included in the broadcast of the received area one-segment broadcasting station AOB3. ) “AOB3” is acquired.

  When receiving the broadcast, the CPU 210 controls each functional block of the digital broadcast receiving apparatus 100, decodes the broadcast of the area one-segment broadcasting station AOB3, generates content, and presents the generated content to the user. However, since these processes are not related to the present invention, the description of the processes related to content generation will be omitted in the following description.

  When the digital broadcast receiving apparatus 100 moves and passes the position of T22, it is out of the broadcast receivable area of the area one-segment broadcasting station AOB3. Accordingly, the reception impossibility detection unit 2101 of the CPU 210 detects that the broadcast of the area one-segment broadcasting station AOB3 has become unreceivable.

  The fact that reception is impossible indicates that information indicating that the electric field intensity or C / N ratio obtained from the tuner 201 has decreased, or that a PMT (Program Map Table) obtained from the demultiplex 203 cannot be acquired. Detection is performed based on information, information indicating that a decoding error obtained from the video decoder 204 or the audio decoder 205 has occurred, and the like.

  When it is detected that the broadcast of the area one-segment broadcasting station AOB3 cannot be received, the reception control unit 2102 of the CPU 210 is stored in the broadcasting station information storage unit 2131 with the name information “AOB3” acquired in advance. The current broadcasting station information of the area one-segment broadcasting station AOB3 in the broadcasting station information list is referred to, and the cooperative broadcasting station information associated with the current broadcasting station information is acquired. In this cooperative broadcasting station information, 31ch is described as frequency information of the next receivable area one-segment broadcasting station AOB2. Accordingly, the reception control unit 2102 of the CPU 210 sets this 31ch in the tuner 201 and receives the broadcast of the area one-segment broadcasting station AOB2.

  In addition, at the time of passing through the point T22, there is a possibility that other area one seg broadcasting that is not broadcast of the area one seg broadcasting station AOB2 may be received. However, when linked broadcasting station information of the broadcasting station information is obtained, Priority is given to the broadcast of the Area One Seg broadcast station described in the information.

  Further, when the digital broadcast receiving apparatus 100 moves and passes the position of T21, it is out of the broadcast receivable area of the area one-segment broadcasting station AOB2. Accordingly, the reception impossibility detection unit 2101 of the CPU 210 detects that the broadcast of the area one-segment broadcasting station AOB2 has become unreceivable.

  When detecting that the broadcast of the area one-segment broadcasting station AOB2 cannot be received, the reception control unit 2102 of the CPU 210 detects the area one-segment broadcasting station AOB2 in the broadcasting station information list stored in the broadcasting station information storage unit 2131. With reference to the current broadcast station information, cooperative broadcast station information associated with the current broadcast station information is acquired. In this cooperative broadcasting station information, 32ch is described as frequency information of the next receivable area one seg broadcasting station AOB1. Therefore, the reception control unit 2102 of the CPU 210 sets this 32ch in the tuner 201 and sets the area one seg. The broadcast of the broadcast station AOB1 is received. In this case, since it is known from the cooperative broadcasting station information that the received broadcast is the broadcast of the area one-segment broadcasting station AOB2, it is necessary to acquire the name information from the NIT as when passing through T23. Absent.

  Furthermore, when the digital broadcast receiving apparatus 100 moves and passes the position of T20, it is out of the broadcast receivable area of the area one-segment broadcasting station AOB1. Accordingly, the reception impossibility detection unit 2101 of the CPU 210 detects that the broadcast of the area one-segment broadcasting station AOB1 has become unreceivable.

When it is detected that the broadcast of the area one-segment broadcasting station AOB1 cannot be received, the reception control unit 2102 of the CPU 210 detects the area one-segment broadcasting station AOB1 in the broadcasting station information list stored in the broadcasting station information storage unit 2131. Reference is made to the current broadcast station information, but this current broadcast station information does not include cooperative broadcast station information. Therefore, the reception control unit 2102 of the CPU 210 stops the automatic channel selection information and waits for a new manual channel selection by the user. Alternatively, automatic channel selection may be attempted by searching for a new area one-segment broadcasting by channel search or random channel selection. The channel search is a process of searching for a receivable broadcast (broadcast station) by sequentially selecting physical channels (frequencies) within a predetermined range.
<Operation flow>
The flow of the operation of the main part in the first embodiment will be described with reference to FIGS.

  FIG. 6 is a flowchart for explaining the flow of operation of the first embodiment.

  The flowchart in the figure starts from the time when the first area one-segment broadcasting station is received.

  In FIG. 3, this corresponds to a state in which the digital broadcast receiving apparatus 100 has received the area one-segment broadcasting station AOB3 by the user's channel selection operation after passing through T23.

  First, in step S1001, the reception failure detection unit 2101 of the CPU 210 determines whether or not the broadcast reception is normal. If normal (S1001: Yes), the process proceeds to step S1002.

  On the other hand, when the reception state is poor and channel selection fails (S1001: No), the CPU 210 shifts the processing to step S1005.

  In step S1002, the reception impossibility detection unit 2101 of the CPU 210 determines whether or not the area one seg broadcasting currently being received can be continuously received. When the reception impossibility detection unit 2101 of the CPU 210 determines that continuous reception is possible (S1002: Yes), the reception control unit 2102 of the CPU 210 performs step S1002 until it determines that the reception impossibility detection unit 2101 can no longer receive continuously. Run repeatedly.

  If the reception impossibility detection unit 2101 of the CPU 210 determines that continuous reception is no longer possible (S1002: No), the reception control unit 2102 of the CPY 210 moves the process to step S1003.

  In FIG. 3, this corresponds to a state in which the broadcast of the area one-segment broadcasting station AOB3, 2, 1 cannot be received after the digital broadcast receiving apparatus 100 has passed T22, T21, and T20.

  In step S1003, the reception control unit 2102 of the CPU 210 determines whether or not there is cooperative broadcasting station information corresponding to the area one-segment broadcasting station that has been received so far.

  When the reception control unit 2102 of the CPU 210 determines that the cooperative broadcasting station information is present (S1003: Yes), the process proceeds to step S1004.

  In FIG. 3, this corresponds to a state in which the digital broadcast receiving apparatus 100 has associated broadcast station information corresponding to the current broadcast station information of the area one-segment broadcast stations AOB3 and 2 after passing through T22 and T21.

  On the other hand, when the reception control unit 2102 of the CPU 210 determines in step S1003 that there is no cooperative broadcasting station information (S1003: No), the process proceeds to step S1005.

  In FIG. 3, this corresponds to a state in which the digital broadcast receiving apparatus 100 has no cooperative broadcast station corresponding to the current broadcast station information of the area one-segment broadcast station AOB1 after passing T20.

  In step S1004, the reception control unit 2102 of the CPU 210 executes broadcast reception processing of the cooperative broadcasting station based on the cooperative broadcasting station information, and returns the processing to step S1001.

  In FIG. 3, this corresponds to a state in which the digital broadcast receiving apparatus 100 receives the area one-segment broadcasting stations AOB2, 1 after passing through T22 and T21.

  If channel selection fails in step S1001 or if there is no linked broadcasting station information in step S1003, the reception control unit 2102 of the CPU 210, in step S1005, can newly receive an area one segment by channel search, random channel selection, or the like. Search for broadcasts.

By executing the processing as described above, the digital broadcast receiving apparatus 100 can automatically and sequentially receive a channel selection without causing the user to perform a channel selection operation when sequentially receiving a plurality of area one-segment broadcasts while moving. It becomes possible to do.
[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  Similarly to the first embodiment, the second embodiment is an example in which a broadcast station information list is stored in the broadcast station information storage unit 2131 in advance.

  In the second embodiment, one or more linked broadcast station information corresponding to the current broadcast station information in the broadcast station information is allowed to be described. Then, when there are a plurality of pieces of cooperative broadcasting station information, the movement route of the digital broadcast receiving apparatus 100 is grasped using the GPS (position detecting unit) 215, and based on the grasped moving route information and each cooperative broadcasting station information. The feature is that the area one-segment broadcasting station to be received next is selected. In other words, in the second embodiment, the movement path recognition unit 2103 of the CPU 210 detects the transition of the current position detected by the GPS 215 as needed, and the map generated from the map data stored in the map data storage unit 2132 of the flash memory 213. Thus, the movement route of the digital broadcast receiving apparatus 100 is recognized. Then, the reception control unit 2102 of the CPU 210 selects the area one seg broadcasting station that is present at the closest position among the area one seg broadcasting stations that exist on the recognized movement route, and receives the broadcast of the selected area one seg broadcasting station. Is.

  FIG. 7 is a diagram showing a second embodiment of area one-segment broadcasting for explaining the operation of the second embodiment of the present invention.

  In the figure, an area one seg broadcasting station AOB4 is added to the area one seg broadcasting embodiment of FIG.

  FIG. 8 is a diagram for explaining the configuration of the second broadcast station information used in the second embodiment.

  In the figure, the information of the area one-segment broadcasting station AOB4 is added to the cooperative broadcasting station information corresponding to the current broadcasting station AOB2 with respect to the broadcasting station information of FIG. In addition, information on the area one-segment broadcasting station AOB4 is added to the current broadcasting station information. There is no cooperative broadcasting station information corresponding to the current broadcasting station information of the area one-segment broadcasting station AOB4.

  Hereinafter, this will be described in detail with reference to FIG.

  The movement route A in FIG. 7 is the same route as the movement route in FIG. Therefore, the digital broadcast receiving apparatus 100 receives broadcasts from the broadcast stations in the order of the area one-segment broadcast stations AOB3, 2, and 1. When specifying the current broadcasting station information of the area one-segment broadcasting station AOB3, the name information is used in the first embodiment. However, in the second embodiment, the current position information of the digital broadcast receiver 100 can be acquired by the GPS 215. Accordingly, the digital broadcast receiving apparatus 100 is located in the receivable area of which broadcast station by the current position information and the position information and receivable area information described in each current broadcast station information in the broadcast station information list. It is also possible to specify the current broadcast station information of the currently receiving broadcast station by determining whether or not the broadcast station is currently receiving.

  In addition, at the point of T21 where the broadcast of the area one-segment broadcasting station AOB2 cannot be received, according to the broadcasting station information of FIG. There are two pieces of information with the station AOB4. Therefore, it is necessary to determine which broadcast station to receive. In the second embodiment, the movement route of the digital broadcast receiving apparatus 100 can be grasped by the GPS 215. That is, in the case of the movement route A, it can be understood that the vehicle travels straight through T21. The positions of the area one-segment broadcasting stations AOB1 and AOB1 and 4 can be grasped from the position information of the broadcasting station information. Based on the above information, in this case, the digital broadcast receiving apparatus 100 can determine that it passes near the area one seg broadcasting station AOB1 rather than the area one seg broadcasting station AOB4, so select the area one seg broadcasting station AOB1 and select this Receive broadcasts from broadcast stations.

  Thus, unlike the first embodiment, the second embodiment allows a plurality of cooperative broadcasting stations. Therefore, it is important to determine which broadcast station to select from among a plurality of cooperative broadcast stations. A specific example of this determination process will be described below.

  When there are a plurality of area one seg broadcasting stations capable of receiving a broadcast on the moving path of the digital broadcast receiving apparatus 100, a broadcasting station present at the closest position on the moving path is selected from the plurality of area one seg broadcasting stations. . An example of a method for determining the presence at the closest position will be described below. For example, a perpendicular line is drawn from the selected cooperative broadcasting station to the moving path of the digital broadcast receiving apparatus 100. And the distance of the perpendicular and the distance from the intersection of a perpendicular and a movement path | route to the position of the digital broadcast receiver 100 are added. The linked broadcasting station with the shortest added distance is determined as the broadcasting station existing at the closest position.

  On the other hand, the travel route B in FIG. 7 is a route that makes a right turn at a point T70. Also in this case, the movement path of the digital broadcast receiving apparatus 100 can be grasped by the GPS 215. That is, in the case of the movement route B, it can be grasped that the vehicle turns right at T70. The positions of the area one-segment broadcasting stations AOB1 and AOB1 and 4 can be grasped from the position information of the broadcasting station information. Based on the above information, in this case, it can be determined that the vehicle passes near the area one seg broadcasting station AOB4 rather than the area one seg broadcasting station AOB1, so the area one seg broadcasting station AOB4 is selected and the broadcast of the selected broadcasting station is received. To do.

As described above, according to the second embodiment, the movement path of the digital broadcast receiving apparatus 100 is grasped by the GPS 215, and the position of the area one-segment broadcasting station is grasped by the position information of the broadcasting station information. When there are a plurality of pieces of cooperative broadcasting station information corresponding to the station information, it is possible to select a broadcasting station that passes the closest among a plurality of area one-segment broadcasting stations corresponding to the plurality of pieces of cooperative broadcasting station information.
<Operation flow>
The flow of the operation of the main part in the second embodiment will be described with reference to FIGS.

  FIG. 9 is a flowchart for explaining the flow of the operation of the second embodiment.

  In this flowchart, the same step numbers are assigned to steps having the same processing contents as those in the flowchart of the first embodiment shown in FIG.

  The flowchart of FIG. 9 also starts at the time when the first area one-segment broadcasting station is received.

  In FIG. 7, this corresponds to a state in which the digital broadcast receiving apparatus 100 has received the area one-segment broadcasting station AOB3 by the user's channel selection operation after passing through T23.

  First, in step S1001, the reception failure detection unit 2101 of the CPU 210 determines whether or not the broadcast reception is normal. If normal (S1001: Yes), the process proceeds to step S2001.

  On the other hand, if the reception state is bad and channel selection fails (S1001: No), the reception control unit 2102 of the CPU 210 moves the process to step S2005.

  In step S2001, the reception control unit 2102 of the CPU 210 determines whether or not there is one or more linked broadcast station information corresponding to the currently received area one seg broadcast station.

  When the reception control unit 2102 of the CPU 210 determines that the cooperative broadcasting station information is present (S2001: Yes), the process proceeds to step S2002.

  This corresponds to the state in which the digital broadcast receiving apparatus 100 has received the area one-segment broadcasting stations AOB3 and 2 in FIG.

  In step S2002, the reception control unit 2102 of the CPU 210 exists on the moving path of the digital broadcast receiving apparatus 100 in the area one-segment broadcasting station described in the one or more linked broadcasting station information. It is determined whether or not there is anything that can be received.

  At this time, when the area one seg broadcasting station AOB2 is received in FIG. 7, there are two pieces of cooperative broadcasting station information of the area one seg broadcasting station AOB2. Therefore, the reception control unit 2102 of the CPU 210 moves according to the method described above. In the case of route A, area one seg broadcasting station AOB1 is selected, and in the case of movement route B, area one seg broadcasting station AOB4 is selected.

  In step S2002, if the reception control unit 2102 of the CPU 210 determines that there is an area one seg broadcasting station that can be received on the moving path (S2002: Yes), the process proceeds to step S1002.

  On the other hand, if the reception control unit 2102 of the CPU 210 determines that there is no area-one-segment broadcasting station that can be received on the moving route (S2002: No), the process proceeds to step S2004.

  In step S2004, the reception control unit 2102 of the CPU 210 stops receiving the currently received broadcast. The reason why the reception is canceled in this step will be described below.

  As shown in FIGS. 3 and 7, when a plurality of area one-segment broadcasting stations are lined up along the road, each broadcasting station designates a vehicle (user) equipped with a digital broadcast receiving device 100 that receives each broadcasting as a certain predetermined one. An operation mode may be considered in which content providing information to a user in a relay format is broadcast. Step S2004 is a process required when this operation mode is considered. That is, although there is a cooperative broadcasting station, it does not exist on the moving path of the digital broadcast receiving device 100. This means that the currently receiving area one seg broadcasting station is directed to a predetermined location where the user wants to guide the user. ) Means not heading. Therefore, it is no longer necessary to receive this area one-segment broadcasting station broadcast and present the user with information to guide the user to a predetermined location, and there is a concern that the user may feel annoyed. The reception is canceled.

  Then, in step S2004, the reception control unit 2102 of the CPU 210 shifts the process to step S2005 when reception of the currently received broadcast is stopped.

  In step S1002, the reception impossibility detection unit 2101 of the CPU 210 determines whether or not the area one seg broadcasting currently being received can be continuously received. If it is determined that continuous reception is possible (S1002: Yes), the reception control unit 2102 returns the process to step S2002. In the first embodiment, step S1002 is repeatedly executed until continuous reception is no longer possible, but in the second embodiment, the process returns to S2002. The reason for this will be described below.

  In the first embodiment, information on the movement path of the digital broadcast receiving apparatus 100 is not used. Accordingly, the digital broadcast receiving apparatus 100 cannot execute the next process until after the continuous reception cannot be performed. However, in the first embodiment, there is only one cooperative broadcasting station information associated with the current broadcasting station information, so there is no problem in such processing.

  However, in the second embodiment, it is allowed to describe a plurality of linked broadcast station information associated with the current broadcast station information. When a plurality of broadcast stations are described, it is necessary to select a broadcast station described in one of the linked broadcast station information based on the movement path of the digital broadcast receiver 100. The travel route may be changed at any time. Therefore, as in the first embodiment, rather than waiting in a loop until continuous reception is no longer possible, the processing is returned to step S2002 and the movement path of the digital broadcast receiving apparatus 100 is grasped as needed, so that the movement path is changed. It becomes possible to change the selection of the cooperative broadcasting station flexibly. In addition, since it can be determined that the cooperative broadcasting station no longer exists on the changed moving route, the reception cancellation process in step S2004 described above becomes more effective.

  The above will be specifically described by taking the movement route C in FIG. 7 as an example. The moving route C is a route in which the digital broadcast receiving apparatus 100 moves from the upper side to the lower side and makes a right turn at a point (intersection) at T70. At this time, the digital broadcast receiving apparatus 100 receives a broadcast from the area one-segment broadcasting station AOB2. In the cooperative broadcasting station information of the area one-segment broadcasting station AOB2, information on two broadcasting stations of the area one-segment broadcasting AOB4 and 1 is described. At the time when the digital broadcast receiving apparatus 100 is moving from the upper side to the lower side, the reception control unit 2102 of the CPU 210 selects the area one-segment broadcasting station AOB4 that exists on the moving path. However, the digital broadcast receiver 100 turns right at the intersection of T70. If the process loops in step S1002 as in the first embodiment, the area one-segment broadcasting station AOB4 is continuously selected in such a case. However, by returning the processing to step S2002 as in the second embodiment, it is possible to determine that the movement route of the digital broadcast receiving apparatus 100 is changed and that there is no cooperative broadcasting station on the changed movement route. , It is possible to promptly shift to the reception cancellation process in step S2004. At this time, the user may be notified by issuing a voice message such as “Because it has turned in a direction different from the broadcast being received, the reception will be stopped”.

  It should be noted that step S2004 may be omitted when receiving a broadcast from an area one-segment broadcasting station that broadcasts content not intended to guide the user to a predetermined location as described above.

  In step S1002, if the reception impossibility detection unit 2101 of the CPU 210 determines that continuous reception is no longer possible (S1002: No), the reception control unit 2102 shifts the processing to step S1004.

  In step S1004, the reception control unit 2102 of the CPU 210 executes broadcast reception processing of the cooperative broadcasting station based on the cooperative broadcasting station information finally selected in step S2002, and returns the processing to step S1001.

  When channel selection fails in step S1001 or when reception of the currently received broadcast is stopped in step S2004, the reception control unit 2102 of the CPU 210 receives area one-segment broadcasting that can be received on the current movement route in step 2005. Search for a broadcast station that broadcasts.

By executing the processing as described above, the digital broadcast receiving apparatus 100 exists on the moving path without allowing the user to perform a channel selection operation when sequentially receiving a plurality of area one-segment broadcasting while moving. It is possible to select an area one-segment broadcasting station and automatically select and receive broadcasts of the selected broadcasting station sequentially.
[Third embodiment]
The above description is an example in which the digital broadcast receiving apparatus 100 acquires a broadcast station information list as shown in FIG. 4 from the outside in advance and stores it in the broadcast station information storage unit 2131.

  However, the digital broadcast receiving apparatus 100 may be configured to acquire broadcast station information from area one-segment broadcasting at any time without storing the broadcast station information list in advance. In this case, a digital broadcast receiving system in which the digital broadcast receiving apparatus 100 and an area one-segment broadcasting station (digital broadcast transmitting apparatus) cooperate with each other is obtained.

  Hereinafter, this digital broadcast receiving system will be described as a third embodiment.

  FIG. 10 is a block diagram for explaining the configuration of the digital broadcast transmitting apparatus 300 in the digital broadcast receiving system according to the third embodiment.

  The cooperative broadcasting station information storage unit 401 stores the cooperative broadcasting station information of the broadcasting station that broadcasts the next receivable digital broadcast described in the first and second embodiments.

  The additional data generation unit 402 generates additional data such as the data carousel used for displaying the above-described SI / PSI and data broadcasting content. At this time, the cooperative broadcasting station information stored in the cooperative broadcasting station information storage unit 401 is included in the additional data.

  In this case, for example, NIT (Network Information Table) of PSI and a system management descriptor (System management descriptor) described in the NIT are used as a transmission method of broadcast station information from the area one-segment broadcasting station to the digital broadcast receiving apparatus 100. ) Can be considered.

  The encoder 403 encodes input video / audio signals into compressed digital video data and audio data, respectively.

  The multiplexer 404 multiplexes (multiplexes) the encoded digital video data, audio data, and generated additional data to generate a digital stream.

  The modulation / transmission unit 405 modulates the generated digital stream and wirelessly transmits it as a digital broadcast via the transmission antenna 406. It should be noted that the transmission power at this time is the same as the internal configuration of the digital broadcast transmitting apparatus 300, exactly as described in the digital broadcast receiving apparatus 100, including the CPU, RAM, ROM, flash memory, bus, and the like. Included as However, since these blocks are not the main part of the present invention, they are omitted.

  Hereinafter, a specific method for including the cooperative broadcasting station information in the additional data using the NIT and the system management descriptor in the additional data generation unit 402 will be described.

  The NIT is a table for notifying information of broadcasting stations that broadcast including the NIT. FIG. 11 is a diagram showing the structure of this NIT. Since this is a known table, a detailed description of the structure is omitted.

  The system management descriptor shown in FIG. 12 is described in the first or second descriptor field of the NIT.

  This system management descriptor is a descriptor for notifying information such as a broadcast type. The additional identification info field of this descriptor is a field that can be used uniquely by each broadcaster. Use this field.

  For example, in the case of the area one-segment broadcasting station AOB3, information corresponding to the cooperative broadcasting station information of the broadcasting station information in FIG. 4 is added to the additional identifier information field in the system management descriptor in the NIT transmitted by the broadcasting station, that is, the area one-segment broadcasting. Information indicating the position, frequency, name, and range of the broadcasting station AOB2 is described.

  As a result, the digital broadcast receiving apparatus 100 obtains broadcast station information (cooperative broadcast station information) of the next receivable area one-segment broadcast station by analyzing the NIT when the broadcast of the area one-segment broadcast station AOB3 is received. can do.

  FIG. 13 is a diagram illustrating a specific example in which the above-described cooperative broadcasting station information is described in the additional identifier information field in the system management descriptor.

  FIG. 13A shows an example of describing the same parameters as the parameters of the linked broadcast station information of the broadcast station information shown in FIG.

  In the oneseg link flag field, an identification number indicating that the following information is information on the next receivable broadcast station, that is, linked broadcast station information in the broadcast station information, is described in 1 byte. The identification number may be uniquely assigned by the broadcaster.

  In the frequency field, information indicating the frequency in the linked broadcasting station information is described in 2 bytes. For example, it is described by a numerical value with 1/7 MHz as a unit. The broadcast wave has a predetermined band (6 MHz), but the frequency information described here is the center frequency of the band.

  The physical channel numbers (channels 13 to 52) and the center frequency have a one-to-one correspondence, and are determined so that the center frequency = (physical channel number−13) × 6 + 473 MHz.

  The lat field and the lng field are used for describing information indicating a position in the cooperative broadcasting station information. In this description, an example of using latitude and longitude information as information indicating a position is shown. Therefore, information indicating latitude is described in the lat field, and information indicating longitude is described in the lnd field.

  In the lat field, for example, a fixed-point 4-byte numerical value is described in which the north latitude is a positive number and the south latitude is a negative number. Of the 4 bytes, the upper 9 bits are described as a signed integer part, and the lower 23 bits are described as a decimal part.

  In the lnd field, for example, a fixed-point 4-byte numerical value in which positive number is used for east longitude and negative number for west longitude is described. Of the 4 bytes, the upper 9 bits are described as a signed integer part, and the lower 23 bits are described as a decimal part.

  The name length field and the name field are used to describe information indicating the broadcast station name in the linked broadcast station information.

  In the name length field, the byte length of the name field that follows is described in 1 byte.

  In the name field, a character string indicating the name of the broadcasting station is described in characters. The string length corresponds to the byte length specified in the name length field. Therefore, the name of the broadcasting station can be represented by a variable-length character string.

  In the radius field, information indicating a receivable area in the cooperative broadcasting station information is described in 1 byte. For example, the radius when the receivable area is assumed to be a perfect circle is described with a numerical value in units of 1 m.

  If there are a plurality of area one-segment broadcasting stations that can be received next, the additional identifier information field described above is repeatedly described as many times as there are.

  FIG. 13B is an example in which the information on the receivable area in FIG. In the example of FIG. 13A, the receivable area is assumed to be a perfect circle. However, as described above, the receivable area may not be a perfect circle due to the influence of surrounding terrain and buildings. Therefore, it is actually necessary to indicate a more complex coverage area.

  Since the oneseg link flag field to the name field are the same as in FIG.

  The radius or region field is different.

  In the radius or region field, information indicating the receivable area of the linked broadcast station information described subsequently is described with a numerical value indicating the radius as in FIG. 13A, or The information for distinguishing whether it is described by a numerical value indicating a more complicated receivable area is described by 1 byte.

  For example, when this information is 0x01, it indicates that the following information indicating the receivable area is described by a numerical value indicating a radius, that is, a radius field. What is necessary is just to show that it is described by the numerical value which shows a complicated receivable area.

  The radius field is the same as in FIG.

  The region length field and the subsequent region lat and region lng fields are used to describe information indicating a more complicated coverage area.

  In the region length field, the byte length of the entire set of three or more region lat fields and region lng fields that follow is described in 1 byte.

  The region lat field and the region lng field describe information indicating latitude and information indicating longitude, respectively. The coordinates of one point in the receivable area are indicated by this latitude and longitude information. Therefore, it is possible to specify an arbitrary area of a polygon by describing three or more coordinates and connecting the coordinates.

  The information indicating the latitude and longitude described in the region lat field and the region lng field may be in the same format as the numerical format described in the lat field and the lng field described above.

  FIG. 14 is a specific example in which a more complex receivable area is expressed using the latitude and longitude information described in the region lat field and the region lng field. The coordinates are indicated as (latitude, longitude) in the vicinity of each ● in the figure. In the figure, a closed area surrounded by 10 coordinates from (retion lat1, region lng1) to (retion lat10, region lng10) is defined as a receivable area.

Of course, the above-described information indicating a more complex receivable area may be described in place of the radius information in the range information of the broadcast station information in FIG. 4 or FIG.
<Operation flow>
The operation flow of the third embodiment described above is basically the same as that of the first and second embodiments.

  Whether the cooperative broadcasting station information to be referred to when receiving the broadcast of the area one-segment broadcasting station is acquired from the broadcasting station information storage unit 2131 (first and second embodiments) or from the broadcast wave (third embodiment) ) Are different, and detailed description thereof is omitted.

In the above description, the example in which the cooperative broadcast station information is described in the additional identifier information field of the system management descriptor of the NIT has been described. Of course, it is possible to specify and operate a unique table, a unique descriptor, and a unique field.
[Reference example]
Next, a method for guiding the user to a predetermined place in the above-mentioned titles 1 to 3 will be described as a reference example.

  For example, in FIG. 7, it is assumed that a predetermined place where the area one-segment broadcasting station AOB4 to 1 wants to guide the user is a gas station, and the gas station is attached to the area one-segment broadcasting station AOB1.

At this time, for example, in the content broadcast on the area one-segment broadcasting station AOB3,
“If you continue for 400 meters, there will be a gas station on the left.”
The video information for displaying the video with the content on the display unit or the audio information for outputting the content as audio from the speaker is included.

The video information may be video information or graphics information. In addition, when the car navigation is also provided, this video information may be displayed superimposed on the car navigation map screen.
Similarly, in Area One Seg broadcasting station AOB2,
“If you continue 200m, there will be a gas station on the left.”
In Area One Seg Broadcasting AOB1,
“Soon, there will be a gas station on the left.”
Include video information or audio information.

  Further, for example, in FIG. 7, it is assumed that there is no area one-segment broadcasting station AOB1, and the area one-segment broadcasting AOB4 is located at a gas station.

  In this case, the cooperative relationship between the broadcasting stations is the order of area one-segment broadcasting AOB 3, 2, 4. In this case, it is not possible to arrive at the gas station (area one seg broadcasting station AOB4) to be finally guided without turning right at the point T70 as in the travel route B.

So in this case,
In Area One Seg broadcasting station AOB3,
“After 300m turn right, there is a gas station.”
In Area One Seg Broadcasting Station AOB2, “I will turn right soon and there will be a gas station.”
In Area One Seg broadcasting station AOB4,
“Soon, there will be a gas station on the left.”
The video information or the audio information with the contents of the above is included in the content broadcast by each broadcasting station.

  By presenting information as described above, the user can be more smoothly guided to the destination.

  For example, in the case of the movement route C in FIG. 7, as described in the second embodiment, it is determined in step S2002 in FIG. 9 that the cooperative broadcasting station does not exist in the moving direction, and the area one-segment broadcasting station AOB2 is broadcast. Cancel. Therefore, only necessary information can be presented without presenting redundant information to the user.

  In the embodiment of FIGS. 4 and 7, an example is shown in which broadcast stations with a radius of 100 m are all arranged in a receivable area. However, even if broadcast stations with different receivable areas (that is, different transmission powers) are arranged. Of course it is good. For example, there may be a broadcasting station having a receivable area only in a very narrow range having a radius of several meters.

  For example, while a broadcasting station for guiding to a gas station has a radius of 100 m as a receivable area, a broadcasting station in a receivable area with a radius of several meters is connected to a refueling apparatus ( Alternatively, it is possible to prepare for each refueling lane). In this case, the content broadcasted by the broadcasting station provided in the fueling device (or fueling lane) may be content that provides information such as the oil type and price handled by the fueling device (or fueling lane).

In this description, the receivable area has been described with a radius of 100 m. However, the present invention is effective even when the receivable area becomes wider (for example, about several kilometers). In this case, the maximum transmission power of the broadcasting station is about 1 W.

100: digital broadcast receiver 200: antenna 201: tuner 202: descrambler 203: multiplexer 204: video decoder 205: audio decoder 206: graphics 207: demultiplexer RAM
210: CPU
211: ROM
212: RAM
213: Flash memory 214: RTC
215: GPS
216: User interface 2101: Unreceivable detection unit 2102: Reception control unit 2131: Broadcast station information storage unit 2132: Map data storage unit 300: Digital broadcast transmission device 401: Cooperative broadcast station information storage unit 402: Additional data generation unit 403: Encoder 404: Multiplexer 405: Modulation / transmission unit 406: Transmission antenna

Claims (12)

A portable digital broadcast receiving device for receiving a plurality of digital broadcasts,
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station One piece of linked broadcasting station information including second identification information for identifying a second broadcasting station that broadcasts the digital broadcast that can be received next, and broadcast frequency information that the second broadcasting station uses for broadcasting; A broadcasting station information storage unit in which at least one broadcasting station information associated with
A receiver for receiving a digital broadcast by the first broadcast station;
A reception impossibility detecting unit for detecting that the digital broadcast by the first broadcasting station has become unreceivable;
If the reception impossibility detection unit detects reception impossibility, the one or more current broadcast station information stored in the broadcast station information storage unit based on the received first identification information of the first broadcast station The current broadcast station information of the first broadcast station that has been received is identified, and the second broadcast is based on the broadcast frequency information included in the associated broadcast station information corresponding to the identified current broadcast station information. The receiving unit is controlled to receive a digital broadcast by the station, and a second broadcast station that broadcasts the received digital broadcast is set as a new first broadcast station, and a second identification of the second broadcast station is performed. A control unit having information as first identification information of the new first broadcasting station;
A digital broadcast receiver characterized by comprising: A portable digital broadcast receiving device for receiving a plurality of digital broadcasts,
A position detection unit for detecting a position where the digital broadcast receiving apparatus exists, as needed;
A movement path recognition unit for recognizing the movement path of the digital broadcast receiving device from the transition of the position detected at any time by the position detection unit;
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station The second identification information for identifying the second broadcast station that broadcasts the digital broadcast that can be received next, the broadcast frequency information that the second broadcast station uses for broadcasting, and the position of the second broadcast station Broadcast in which at least one broadcast station information associated with information and one or more linked broadcast station information including receivable area information indicating an area in which the broadcast of the second broadcast station can be received is stored in advance A station information storage unit;
A receiver for receiving a digital broadcast by the first broadcast station;
A reception impossibility detecting unit for detecting that the digital broadcast by the first broadcasting station has become unreceivable;
When the receiving unit receives the digital broadcast from the first broadcasting station, the one or more current stations stored in the broadcasting station information storage unit are based on the received first identification information of the first broadcasting station. From the broadcast station information, specify the received current broadcast station information of the first broadcast station,
If there is one linked broadcast station information corresponding to the identified current broadcast station information, select the linked broadcast station information,
When there are a plurality of cooperative broadcast station information corresponding to the identified current broadcast station information, the position information of the second broadcast station and the receivable area information respectively included in the plurality of cooperative broadcast station information, and the movement route On the basis of the information indicating the selected broadcasting station information of the second broadcasting station that is present in the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control unit to be identification information of
A digital broadcast receiver characterized by comprising: A digital broadcast transmission / reception system including a plurality of digital broadcast transmission devices that broadcast digital broadcasts, and a portable digital broadcast reception device that receives digital broadcasts by the plurality of digital broadcast transmission devices,
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. Have a transmitter to broadcast
The digital broadcast receiving apparatus includes:
A receiver for receiving a digital broadcast by the first digital broadcast transmitter;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
When the reception failure detection unit detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. And a control unit that uses the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device.
A digital broadcast transmission / reception system characterized by that. A digital broadcast transmission device that broadcasts a digital broadcast for a portable digital broadcast reception device,
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. A digital broadcast transmission apparatus comprising a transmission unit for broadcasting. A portable digital broadcast receiving device for receiving a plurality of digital broadcasts,
The first digital broadcast transmitting apparatus includes broadcast frequency information used for broadcasting by the second digital broadcast transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcast receiving apparatus moves. A receiving unit for receiving digital broadcasts including information on two linked broadcast stations,
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
When the reception failure detection unit detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. In addition, a control unit that sets the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device,
A digital broadcast receiver characterized by comprising: A plurality of digital broadcast transmitters for broadcasting digital broadcasts;
A digital broadcast transmission / reception system including a portable digital broadcast reception device that receives a digital broadcast by the plurality of digital broadcast transmission devices;
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a transmission unit that broadcasts the digital broadcast including one or more linked broadcast station information including receivable area information indicating an area where the second digital broadcast transmission apparatus can receive the broadcast,
The digital broadcast receiving apparatus includes:
A position detection unit for detecting a position where the digital broadcast receiving apparatus exists, as needed;
A movement path recognition unit for recognizing the movement path of the digital broadcast receiving device from the transition of the position detected at any time by the position detection unit;
A receiver for receiving a digital broadcast by the first digital broadcast transmitter;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives a digital broadcast by the first digital broadcast transmission device, obtains the one or more linked broadcast station information included in the received digital broadcast,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. Having a control unit as identification information of
A digital broadcast transmission / reception system characterized by that. A digital broadcast transmission device that broadcasts a digital broadcast for a portable digital broadcast reception device,
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a digital broadcast transmitter including at least one cooperative broadcast station information including receivable area information indicating a receivable area information indicating a receivable area of the second digital broadcast transmitting apparatus. Broadcast transmission device. A portable digital broadcast receiving device for receiving a plurality of digital broadcasts,
A position detection unit for detecting the presence position of the digital broadcast receiver as needed;
A movement path recognition unit for recognizing a movement path of the digital broadcast receiving device from the transition of the existence position detected at any time by the position detection unit;
Broadcast frequency information used for broadcast by the second digital broadcast transmission device that broadcasts the digital broadcast that is received next by the first digital broadcast transmission device as the digital broadcast reception device moves, the first Digital broadcasting that includes one or more pieces of linked broadcasting station information including location information of the digital broadcasting transmitting device 2 and receivable region information indicating a region where the broadcasting of the second digital broadcasting transmitting device can be received. A receiving unit for receiving;
A reception impossibility detecting unit for detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the receiving unit receives a digital broadcast by the first digital broadcast transmission device, obtains the one or more linked broadcast station information included in the received digital broadcast,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception disable detection unit detects reception disable, the reception unit is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control unit to be identification information of
A digital broadcast receiver characterized by comprising: A digital broadcast receiving method used for a portable digital broadcast receiving apparatus for receiving a plurality of digital broadcasts,
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station One piece of linked broadcasting station information including second identification information for identifying a second broadcasting station that broadcasts the digital broadcast that can be received next, and broadcast frequency information that the second broadcasting station uses for broadcasting; A broadcast station information storage step for storing one or more broadcast station information associated with
Receiving a digital broadcast by the first broadcast station;
An unreceivable detection step of detecting that the digital broadcast by the first broadcasting station is unreceivable;
If the reception failure detection step detects reception failure, the one or more current broadcast station information stored in the broadcast station information storage unit based on the first identification information of the first broadcast station that has been received. The current broadcast station information of the first broadcast station that has been received is identified, and the second broadcast is based on the broadcast frequency information included in the associated broadcast station information corresponding to the identified current broadcast station information. The reception step is controlled so as to receive the digital broadcast by the station, and the second broadcast station that broadcasts the received digital broadcast is set as a new first broadcast station, and the second identification of the second broadcast station is performed. A control step of setting information as first identification information of the new first broadcasting station;
A digital broadcast receiving method comprising: A digital broadcast receiving method used for a portable digital broadcast receiving apparatus for receiving a plurality of digital broadcasts,
A position detecting step for detecting a position where the digital broadcast receiving apparatus exists, as needed;
A movement path recognition step for recognizing a movement path of the digital broadcast receiver from the transition of the position detected at any time in the position detection step;
One current broadcast station information including first identification information for identifying the first broadcast station that broadcasts the digital broadcast, and the movement of the digital broadcast receiving apparatus after receiving the broadcast of the first broadcast station The second identification information for identifying the second broadcast station that broadcasts the digital broadcast that can be received next, the broadcast frequency information that the second broadcast station uses for broadcasting, and the position of the second broadcast station Broadcast station information that stores in advance one or more broadcast station information that associates information and one or more linked broadcast station information including receivable area information indicating an area in which broadcast of the second broadcast station can be received. A memory step;
Receiving a digital broadcast by the first broadcast station;
An unreceivable detection step of detecting that the digital broadcast by the first broadcasting station is unreceivable;
When the receiving step receives a digital broadcast by the first broadcasting station, the one or more current stations stored in the broadcasting station information storage unit based on the received first identification information of the first broadcasting station. From the broadcast station information, specify the received current broadcast station information of the first broadcast station,
If there is one linked broadcast station information corresponding to the identified current broadcast station information, select the linked broadcast station information,
When there are a plurality of cooperative broadcast station information corresponding to the identified current broadcast station information, the position information of the second broadcast station and the receivable area information respectively included in the plurality of cooperative broadcast station information, and the movement route On the basis of the information indicating the selected broadcasting station information of the second broadcasting station that is present in the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception failure detection unit detects reception failure, the reception step is controlled to receive a digital broadcast by the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. A control step for identifying information of
A digital broadcast receiving method comprising: A digital broadcast transmission / reception method using a plurality of digital broadcast transmitters for broadcasting digital broadcasts and a portable digital broadcast receiver for receiving digital broadcasts by the plurality of digital broadcast transmitters,
The first digital broadcast transmission device among the plurality of digital broadcast transmission devices is:
One cooperative broadcasting station information including broadcast frequency information used for broadcasting by the second digital broadcasting transmitting apparatus that broadcasts the digital broadcast that can be received next as the digital broadcasting receiving apparatus moves is included in the digital broadcasting. A transmission step for broadcasting
The digital broadcast receiving apparatus includes:
Receiving a digital broadcast by the first digital broadcast transmitter;
A reception additional detection step for detecting that the digital broadcast by the first digital broadcast transmission device is not received;
When the receiving unit receives the digital broadcast by the first digital broadcast transmission device, obtain the cooperative broadcasting station information included in the received digital broadcast,
If the reception failure detection step detects reception failure, the reception unit is controlled to receive a digital broadcast by the second broadcast transmission device based on the broadcast frequency information included in the acquired cooperative broadcasting station information. And a control step of using the second digital broadcast transmission device that broadcasts the received digital broadcast as a new first digital broadcast transmission device.
A digital broadcast transmission / reception method. A digital broadcast transmission / reception method using a plurality of digital broadcast transmitters for broadcasting digital broadcasts and a portable digital broadcast receiver for receiving digital broadcasts by the plurality of digital broadcast transmitters,
The first digital broadcast receiver among the plurality of digital broadcast transmitters is:
Broadcast frequency information used for broadcasting by the second digital broadcast transmission device that broadcasts the digital broadcast that can be received next as the digital broadcast reception device moves, position information of the second digital broadcast transmission device, And a transmission step of broadcasting by including one or more cooperative broadcasting station information including receivable area information indicating an area where the second digital broadcast transmitting apparatus can receive a broadcast, in a digital broadcast,
The digital broadcast receiving apparatus includes:
A position detecting step for detecting the presence position of the digital broadcast receiving device as needed;
A movement path recognition step for recognizing a movement path of the digital broadcast receiver from the transition of the existing position detected at any time in the position detection step;
Receiving a digital broadcast by the first digital broadcast transmitter;
A reception failure detection step of detecting that the digital broadcast by the first digital broadcast transmission device has become unreceivable;
When the reception step receives a digital broadcast by the first digital broadcast transmission device, the one or more linked broadcast station information included in the received digital broadcast is acquired,
If the acquired cooperative broadcasting station information is one, select the cooperative broadcasting station information,
When the acquired cooperative broadcast station information is plural, based on the position information and the receivable area information of the second broadcast transmission device included in each of the plural cooperative broadcast station information and the information indicating the movement route Selecting the cooperative broadcasting station information of the second broadcasting station present at the closest position on the moving path of the digital broadcast receiving device,
Thereafter, when the reception failure detection step detects reception failure, the reception unit is controlled to receive a digital broadcast from the second broadcast station based on the broadcast frequency information included in the selected cooperative broadcast station information. In addition, the second broadcasting station that broadcasts the received digital broadcast is set as a new first broadcasting station, and the second identification information of the second broadcasting station is set as the first of the new first broadcasting station. Including a control step as identification information of
A digital broadcast transmission / reception method.

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