JP2010258651A - Broadcast receiver and broadcast receiving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a channel search time during moving in a reception area and thereby shorten the interruption time of viewing of a program by channel search in a receiver that receives broadcast while moving. <P>SOLUTION: A station selection control unit 17 rearranges a list of relay station channels of each broadcast station stored in an information storing unit 15 in the chronological order of reception by a broadcast receiving unit 11, most recently selected and received channel first. Based on the list of relay station channels, a channel that has a network ID identical with that of a broadcast to be searched for is searched for. When there is no such channel available, the present positional information is acquired. Based on the list of relay station channels and the present positional information, a channel having a system ID identical with that of the broadcast to be searched for, with the current area considered to be a broadcast area, is searched for. Thus, by searching for a channel that has a high probability that it can be viewed at the present position first, a channel search time can be shortened. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus and a broadcast receiving method for receiving communication and broadcasting while moving, and more particularly to a broadcast receiving apparatus and broadcast receiving with a short program viewing interruption time by channel search when mobile terrestrial digital broadcasting is received. Regarding the method.

  In digital terrestrial broadcasting in Japan where all video and audio data are sent in the MPEG2 transport stream format, each broadcasting station is proceeding with the development of relay stations so that radio waves can reach every corner of the broadcasting area. The content of the program broadcast by each relay station in the same broadcast station is the same. Each relay station may broadcast using different transmission frequencies (channels) for the purpose of avoiding a reception failure due to digital interference.

  On the other hand, Japanese television broadcasting has different broadcasting stations in each region, and private broadcasting in each region constitutes a network called a series between the regions to share programs. For this reason, there is a high possibility that the broadcast contents belonging to the same series (hereinafter, the same affiliated stations) have the same program contents.

  From the above, in-vehicle receivers installed in automobiles, etc., when moving from the current reception area to another area, the frequency that can be received is different, so the program that was being viewed may not be received. . In this case, it is necessary to perform a channel search for finding a relay station or the same affiliated station in order to continuously receive a program. However, it takes a lot of time to search for all the channels of digital terrestrial broadcasting. During this time, program viewing is interrupted.

  In Patent Document 1, all broadcast station names, reception range information for receiving the broadcasts, and frequency information of signals broadcast by them are stored in a memory, and the current position of the vehicle using GPS (Global Positioning System). By comparing the reception range information stored in the memory with the current position information and searching for a broadcasting station within the receivable range, the same program can be easily received even if it is out of the current reception area. The technology is disclosed.

JP 2001-285101 A

However, in Patent Document 1, since the order of channels to be searched is not specified, for example, when the receivable channels are arranged in the channel searched last, the search time becomes long. .
The present invention has been made in order to solve the above-mentioned problems, and its purpose is to first search for a channel that is likely to be able to be continuously viewed at the current position, so that broadcast reception with a short program interruption time by the channel search is received. An apparatus and a broadcast receiving method are provided.

  In order to achieve the above object, the present invention is a broadcast receiving device that selects and receives broadcast radio waves from a plurality of broadcast stations, a broadcast reception unit that receives and selects broadcast radio waves from a plurality of broadcast stations, and A location information acquisition unit for acquiring current location information, at least an area identification ID for identifying an area in which the broadcast station is broadcasting, and the broadcast station assigned to each of the broadcast stations; Corresponds to a network ID for identifying a broadcast station, a sequence ID for identifying a sequence of the broadcast station assigned to each broadcast station sequence, and a relay station channel list representing channels relayed by the broadcast station An information storage unit for storing the broadcast station table, and a channel selection channel to the broadcast reception unit based on the relay station channel list of the specific broadcast station acquired from the information storage unit. A channel selection control unit that determines the reception state of the channel, and the channel selection control unit determines the reception state of the channel currently being received, and determines that the reception state is not good as a result of the determination of the reception state In the first channel search, a first channel search is performed to detect from the broadcast radio wave a channel whose network ID matches the channel being received based on the broadcast station table. If a channel with a matching ID is not detected, the current location is set as the broadcast region based on the current location information acquired by the location information acquisition unit and the region identification ID included in the broadcast station table, and the channel being received And a second channel search for detecting a channel with the same series ID from the broadcast radio wave, and performing the second channel search. When detecting the channel that matches the switch is characterized in that to control the information storage unit and the broadcast receiving unit to set the channel to be tuned to receive the channel.

  The present invention also provides a broadcast receiving unit that receives and selects broadcast radio waves from a plurality of broadcast stations, a position information acquisition unit that acquires current position information, and at least the broadcast stations that are broadcast by the plurality of broadcast stations. An area identification ID for identifying the area where the broadcasting is performed, a network ID for identifying the broadcasting station allocated to each broadcasting station, and a series of the broadcasting stations allocated to each broadcasting station series An information storage unit that stores a broadcast station table that associates a series ID for identifying a broadcast station table that represents a channel relayed by the broadcast station, and the relay of a specific broadcast station acquired from the information storage unit A broadcast receiving method in a broadcast receiving apparatus including a channel selection control unit that instructs a channel selection channel to the broadcast reception unit based on a station channel list and determines a reception state of each channel. A reception state determination step for determining a reception state of a channel currently being received; and, as a result of determination in the reception state determination step, if it is determined that the reception state is not good, based on the broadcast station table, A first search step of detecting from the broadcast radio wave a channel in which the network ID matches the channel being received, and in the first search step, if the channel in which the network ID matches is not detected, A second search step of detecting from the broadcast radio wave a channel in which the current position is the broadcast area and the channel ID matches the sequence ID based on the location information and the region identification ID, If a matching channel is found in 2 search steps, select and receive the channel It is characterized in Rukoto.

  The present invention is also a broadcast receiving apparatus that selects and receives broadcast radio waves from a plurality of broadcast stations, the broadcast reception unit receiving and selecting broadcast radio waves from the plurality of broadcast stations, and the plurality of broadcast stations At least an area identification ID for identifying an area in which the broadcasting station is broadcasting, a network ID for identifying the broadcasting station allocated to each broadcasting station, and a series of the broadcasting stations A broadcasting station that associates a sequence ID for identifying the allocated broadcasting station sequence with a relay station channel list that represents a channel that the broadcasting station relays, and that represents a channel that is preferentially selected from among the channels. An information storage unit for storing the table, and a channel selection channel to the broadcast receiving unit based on the relay station channel list of the specific broadcast station acquired from the information storage unit, A channel selection control unit that determines the reception status of the channel, and the channel selection control unit determines the reception status of the channel currently being received, and as a result of determining the reception status, determines that the reception status is not good If a new viewable channel is detected from the broadcast radio wave based on the broadcast station table, and a new viewable channel is detected in the channel search, the broadcast reception is performed. The channel is instructed to select and receive the channel, stored as a channel selected with priority in the broadcast station table of the information storage unit, and selected when performing the channel search. The broadcast receiving unit and the information storage unit are controlled to search for a channel first.

  The present invention also provides a broadcast receiving unit that receives and selects broadcast radio waves from a plurality of broadcast stations, a position information acquisition unit that acquires current position information, and at least the broadcast stations that are broadcast by the plurality of broadcast stations. An area identification ID for identifying the area where the broadcasting is performed, a network ID for identifying the broadcasting station allocated to each broadcasting station, and a series of the broadcasting stations allocated to each broadcasting station series Information for storing a series ID for identifying a broadcasting station, a broadcasting station table in which a list of relay station channels representing channels relayed by the broadcasting station is associated, and a database in which adjacent areas are associated with each area identification ID Based on the relay station channel list of the specific broadcasting station acquired from the storage unit and the information storage unit, the broadcast receiving unit is instructed to select a channel, and the reception state of each channel is indicated. A broadcast receiving method in a method receiving apparatus including a tuning control unit to be determined, wherein the tuning control unit acquires current location information from the location information acquisition unit, and is stored in the information storage unit Based on the database, the adjacent area detection step for detecting the adjacent area of the current broadcast area, and the adjacent area detected in the adjacent area detection step based on the broadcasting station table stored in the information storage unit, currently receiving When it is determined that there is a broadcasting station having the same sequence ID as a result of the broadcasting station determination step for determining whether or not there is a broadcasting station having the same sequence ID as that of the channel, and the broadcasting station determination step. Performs channel search by instructing a channel selection based on the relay station channel list of the corresponding broadcast station, and the currently received channel and the channel A channel determination step for determining whether or not a channel having a matching column ID has been detected. If a channel having the same sequence ID is detected as a result of the determination in the channel determination step, the channel is selected and received. It is characterized by being set to the channel to be.

  In addition, the present invention is a broadcast receiving apparatus that selects and receives broadcast radio waves from a plurality of broadcast stations, and starts channel search when it is difficult to receive a program being viewed and allows viewing by the channel search. When a new channel is detected, the channel is selected and received. After that, when a channel search is performed, the search is started from the channel.

  According to the present invention, especially when traveling back and forth through a similar route, the channel search time when moving in the reception area can be shortened, and the broadcast receiving device and the broadcast reception with a short program interruption time by the channel search can be achieved. There is an effect that a method can be provided.

It is a block diagram which shows one Example of the digital broadcast receiver which concerns on the 1st Embodiment of this invention. It is the figure which showed the correspondence of area identification and an area. 3 is a configuration example of a broadcasting station table 30 stored in the information storage unit 15. It is a figure for demonstrating an example of the channel search operation | movement of the digital broadcast receiver which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating an example of the channel rearrangement of a relay station channel list. It is a flowchart which shows an example of the relay station channel search operation | movement of the digital broadcast receiver which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the affiliated station channel search operation | movement of the digital broadcast receiver which concerns on the 1st Embodiment of this invention. It is a structural example of the broadcasting station table 31 at the time of moving from point a to point b. It is a structural example of the adjacent area table 90. FIG. It is a figure for demonstrating an example of rearrangement of the channel searched preferentially.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an example of a digital broadcast receiving apparatus according to the first embodiment of the present invention. This digital broadcast receiving apparatus includes a broadcast antenna 10, a broadcast receiving unit 11, an electronic map storage unit 12, a GPS antenna 13, a GPS receiving unit 14, an information storage unit 15, a channel information acquisition unit 16, and a channel selection control unit 17. Yes.

  In FIG. 1, a broadcast antenna 10 receives broadcast radio waves and supplies a received broadcast signal to a broadcast receiving unit 11. The broadcast receiving unit 11 selects a channel designated by the channel selection control unit 17 from the broadcast signals supplied from the broadcast antenna 10 and detects the reception state and program information of the selected channel to select the channel. This is supplied to the control unit 17. Here, the reception state is calculated from the synchronization state, CNR (Carrier to Noise Ratio), bit error rate and packet error rate in error correction processing, AGC (Auto Gain Control) control voltage, MER (Modulation Error Ratio), and the like. Value. The program information is information such as NIT (Network Information Table) and BIT (Broadcaster Information Table). NIT information is assigned a network ID (independent ID is assigned to each broadcasting station, and identification of the broadcasting station is possible), and BIT information is assigned a series ID (independent ID is assigned to each series. Is possible).

The electronic map storage unit 12 stores an electronic map that displays the boundaries of broadcast areas. One region may be one prefecture or a group of a plurality of prefectures.
The GPS antenna 13 receives GPS radio waves and supplies the received GPS signal to the GPS receiver 14. The GPS receiving unit 14 grasps the broadcasting area of the current position based on the current position obtained from the GPS signal supplied from the GPS antenna 13 and the electronic map stored in the electronic map storage unit 12, The location identification (shown in FIG. 2) is supplied to the channel information acquisition unit 16.

As shown in FIG. 3, the information storage unit 15 stores a broadcast station table 30 in which network IDs, series IDs, relay station channel lists, and area identifications are associated with each broadcast station. The relay station channel list is arranged in the order of channels to be searched, and this order can be rearranged by accessing the information storage unit 15.
The channel information acquisition unit 16 selects a desired relay station channel list from the information storage unit 15 based on information such as the area identification supplied from the GPS reception unit 14 and the broadcast station name supplied from the channel selection control unit 17. Is supplied to the channel selection control unit 17.

  The channel selection control unit 17 instructs the broadcast reception unit 11 on the channel to be selected based on the relay station channel list acquired from the channel information acquisition unit 16 and, if received, the broadcast reception unit 11. The reception status and program information of the channel instructed to be selected are acquired, and it is determined whether or not this channel is a relay station or the same affiliate station of the broadcast received before the search (hereinafter referred to as the search target broadcast). .

Hereinafter, a specific operation example will be described. FIG. 4 is a diagram for explaining an example of the channel search operation of the digital broadcast receiving apparatus according to the first embodiment of the present invention.
In FIG. 4, the digital broadcast receiver mounted on the car starts from point a in area A, goes through a certain route to point b in region B, and then returns to point a through the same route. Shall. The terrestrial digital broadcast receiver is within the area of the relay station 1 that relays the broadcasting station having the area A as the broadcasting area at the point a. Enter another relay station 2 area. When moving further and moving from the A area to the B area, the area leaves the relay station 2 and enters the area of the relay station 3 that relays the broadcasting station having the B area as the broadcasting area, and then reaches the point b. It is assumed that the digital broadcast receiver receives a broadcast radio wave from the relay station 1 and selects and receives channel 25 and watches an “A1 broadcast” program at a point a at which travel starts. As shown in FIG. 3, “A1 broadcast” has five relay station channels. For example, if the channel with the best reception state is 25 channels, it is preferable to select and receive these channels.

  This digital broadcast receiving apparatus rearranges the channels in the relay station channel list in the broadcast station table 30 for the selected broadcast station (here, “A1 broadcast”). FIG. 5A is a diagram for explaining channel rearrangement of the relay station channel list of “A1 broadcast” at point a. The 25 channels selected and received at point a are placed at the top of the search order, and the search order of the channels whose search order is higher than the 25 channels before rearrangement is lowered one by one. With this operation, when searching for the next “A1 broadcast” relay station, 25 channels are searched first.

In FIG. 4, when the vehicle is traveling in the area of the relay station 1, the broadcast receiving unit 11 in FIG. This is supplied to the control unit 17. The channel selection control unit 17 checks the reception state of the “A1 broadcast” supplied from the broadcast reception unit 11.
It is assumed that the automobile has moved and the digital broadcast receiving apparatus has left the area of the relay station 1 (reached point c in FIG. 4). When the channel selection control unit 17 detects that the reception state of the “A1 broadcast” supplied from the broadcast reception unit 11 has become worse than a predetermined threshold, the channel selection control unit 17 starts a channel search operation.
FIG. 6 is a flowchart showing an example of the relay station channel search operation of the digital broadcast receiving apparatus according to the first embodiment of the present invention.

  When the channel search is started, the channel selection control unit 17 instructs the channel information acquisition unit 16 to acquire the “A1 broadcast” relay station channel list. Based on an instruction from the channel selection control unit 17, the channel information acquisition unit 16 uses the broadcast station table 30 stored in the information storage unit 15 to list the “A1 broadcast” relay station channels (25, 13, 15, 19, 36 channels) is acquired and supplied to the channel selection control unit 17 (step S601).

  Next, the channel selection control unit 17 instructs the broadcast reception unit 11 to select a channel in order from the channel with the smallest search order based on the list of relay station channels of “A1 broadcast” acquired from the channel information acquisition unit 16. . However, for the reception channel before search (here, 25 channels), since it is known that the reception state is bad at the start of the search, the search is skipped, and the 13th channel is started here (step S602). If it has been received, NIT information including the reception state and network ID is acquired from the broadcast receiving unit 11 (step S603). The channel selection control unit 17 determines whether or not the acquired network ID matches the network ID (= 0xA1) of “A1 broadcast” (step S604), and if they match (YES in the figure), the relay station Is selected, and this channel is selected and received (step S605). Then, the channel selection control unit 17 updates the “A1 broadcast” relay station channel list for the broadcast station table 30 stored in the information storage unit 15 based on the channel selected and received in step S605. (Step S606). If the channel selected / received in step S605 is 36 channels (FIG. 4), as shown in FIG. 5B, the 36 channels are arranged at the head of the search order, and 25, 13, 15, 19 The channel lowers the search order by one.

  In step S604, if reception is not possible or the acquired network ID does not match the network ID of “A1 broadcast” (NO in the figure), it is determined whether another relay station channel exists ( In step S607), if it exists (YES in the figure), steps S602 to S604 are also performed for other relay station channels and repeated until a matching channel is found. If reception is not possible for all relay station channels or a matching channel is not found (NO in step S607), it is determined that no receivable relay station has been found, and the relay station channel search is terminated. If no receivable relay station is found by the relay station channel search, the channel selection is returned to the “A1 broadcast” channel received before the channel search, or the “A1 broadcast” relay station is found. The relay station channel search in steps S601 to S607 may be repeated. Further, the processing may proceed to affiliated station channel search processing for finding the same affiliated station of “A1 broadcast”, which will be described with reference to FIG.

  Next, in FIG. 4, while the automobile is traveling in the area of the relay station 2, the digital broadcast receiving apparatus receives the broadcast radio wave from the relay station 2 by the relay station channel search described above, and “A1 broadcast” Suppose you are watching. At this time, the broadcast receiving unit 11 selects and receives “A1 broadcast”, detects the reception state of “A1 broadcast”, and supplies it to the channel selection control unit 17. The channel selection control unit 17 checks the reception state of the “A1 broadcast” supplied from the broadcast reception unit 11.

  It is assumed that the automobile moves, the digital broadcast receiving apparatus moves from the A area to the B area, and leaves the area of the relay station 2 (reaches point d in FIG. 4). When the channel selection control unit 17 detects that the reception state of the “A1 broadcast” supplied from the broadcast reception unit 11 has become worse than a predetermined threshold, the channel selection control unit 17 starts a channel search operation.

  When the channel search is started, the digital broadcast receiving apparatus first performs the relay station channel search described with reference to FIG. If no receivable “A1 broadcast” relay station is found, the process proceeds to affiliated station channel search. However, when the channel search is started, the area identification of the current position is acquired from the GPS receiver 14, and if the acquired area identification is different from the broadcast area of “A1 broadcast” (that is, the broadcast area of the current position is “A1 broadcast”) Since the relay station of “A1 broadcast” is unlikely to be received, the relay station channel search is not performed and the affiliated station channel search is started as described in FIG. You may do that.

FIG. 7 is a flowchart showing an example of an affiliated station channel search operation of the digital broadcast receiving apparatus according to the first embodiment of the present invention.
First, the channel selection control unit 17 instructs the channel information acquisition unit 16 to acquire a relay station channel list of the same broadcast station as the sequence ID (= 0) of “A1 broadcast” in the current region. When receiving the instruction from the channel selection control unit 17, the channel information acquisition unit 16 acquires the region identification (= 2 (B region)) of the current position from the GPS reception unit 14 (step S701). Then, the channel selection control unit 17 checks whether there is a broadcast station having the same sequence ID as “A1 broadcast” in the B area from the broadcast station table 30 stored in the information storage unit 15 (step S702). In this case (YES in the figure), the list of relay station channels of the corresponding broadcasting station is supplied to the channel selection control unit 17 (step S703). In the broadcasting station table 30 of FIG. 3, “B1 broadcasting” corresponds to channels 22, 23, 41, and 42 being supplied to the channel selection control unit 17. If there is no corresponding broadcast station in step S702 (NO in the figure), the process proceeds to step S710.

  On the basis of the list of relay stations of “B1 broadcast” acquired from the channel information acquisition unit 16, the channel selection control unit 17 sequentially selects the channel selection channel from the channel with the smallest search order (22 channels in this case) to the broadcast reception unit 11. Is received (step S704), and if it can be received, BIT information including the reception state and sequence ID is acquired from the broadcast receiving unit 11 (step S705). The channel selection control unit 17 determines whether or not the acquired sequence ID matches the sequence ID (= 0) of “A1 broadcast” (step S706). If they match (YES in the figure), “A1 broadcast” ”And the channel is selected and received (step S707). Then, the channel selection control unit 17 updates the “B1 broadcast” relay station channel list for the broadcast station table 30 stored in the information storage unit 15 based on the channel selected and received in step S706. (Step S708). For example, as shown in FIG. 4, if the channel of “B1 broadcast” selected and received in step S708 is 41 channels, the list of relay station channels of “B1 broadcast” is 22, 23, 41, The channels are rearranged in the order of 42 channels, 41, 22, 23, and 42 channels.

FIG. 8 shows the broadcast station database 31 when the digital broadcast receiving apparatus travels from point a to point b. Compared with the broadcast station database 30 at point a before travel shown in FIG. The channel order of the “B1 broadcast” relay station channel list is rearranged.
If reception is not possible or the acquired sequence ID does not match the sequence ID of “A1 broadcast” in step S706 (NO in the figure), is there another “B1 broadcast” relay station channel? Whether or not it exists (YES in the figure), steps S704 to S706 are also performed for other “B1 broadcast” relay station channels, and this is repeated until a matching channel is found. If all of the “B1 broadcast” relay station channels have not been received or if no matching channel is found (NO in the figure), the process proceeds to other identical affiliated station search processing (step S710).

  In step S710, the remaining channels excluding the already searched “B1 broadcast” relay channel from all channels 13 to 62 of the terrestrial digital broadcast are set to “A1 broadcast” in the same manner as in steps S704 to S706. ”Is searched for the same affiliated station. Or you may perform the process which searches the same affiliated station of "A1 broadcast" which makes the adjacent area of the present area broadcasting area. Specifically, as shown in FIG. 9, an adjacent area table 90 in which the target area is associated with the adjacent area is stored in the information storage unit 15. The channel information acquisition unit 16 first refers to the adjacent region table 90 stored in the information storage unit 15 and grasps that the adjacent region of the current region (B region) is the A, C, G region. Next, the channel information acquisition unit 16 refers to the broadcast station table 30 and confirms whether there is a broadcast station having the same series ID as “A1 broadcast” in each of the A, C, and G regions. If it exists, the relay station channel list of the corresponding affiliated station is supplied to the channel selection control unit 17. When there are a plurality of the same affiliated stations, the respective relay station channel lists are collected and supplied to the tuning control unit 17. The channel selection control unit 17 searches for the same affiliated station of “A1 broadcast” based on the supplied relay station channel list in the same manner as in steps S704 to S706.

If the same affiliate station of “A1 broadcast” that can be received is not found in step S710, channel selection is returned to the “A1 broadcast” channel received before the channel search, or “A1 broadcast” The affiliated station channel search in steps S701 to S710 may be repeated until the same affiliated station is found. As a result, when a relay station or the same affiliate station of “A1 broadcast” is not found, regardless of the “A1 broadcast” received so far, one of the received broadcasts (for example, the reception state of the most) May be received).
By the affiliated station channel search described above, the digital broadcast receiving apparatus receives the broadcast radio wave of the relay station 3 at the point d, and reaches the point b while watching “B1 broadcast”.

Subsequently, when returning from the point b to the point a, a channel search is performed at the points e and f outside the area of the relay station.
First, at the point e, since the area B is moved from the area B to the area A, the relay station channel of “A1 broadcast” that is the same series as the search target broadcast (“B1 broadcast”) in the A area is shown in FIG. Searched. Since the relay station channel list of “A1 broadcast” is arranged as shown in FIG. 8, there may be a case where “A1 broadcast” from relay station 2 can be received only once for the 36 channels searched first. Many.

  Subsequently, when moving to point f within the same area A, the relay station channel of the search target broadcast (“A1 broadcast”) is searched according to the flowchart of FIG. The relay station 1 having the f-point as a broadcast area broadcasts “A1 broadcast” on 25 channels, and the search order is arranged second as shown in FIG. The currently received channel (received at the point e) is 36 channels, and since this channel is not searched, the “A1 broadcast” from the relay station 1 can be received with only one of the 25 channels to be searched first. There are many cases.

  When moving from point a to point b again, the list of relay stations for “A1 broadcast” is arranged in the order of 25, 36, 13... The next 36 channels after the selected 25 channels are searched first. Therefore, it is often possible to receive “A1 broadcast” from the relay station 2 in one search. At point d, since the list of relay station channels of “B1 broadcast” is arranged as shown in FIG. 8, according to the flowchart of FIG. In many cases, “B1 broadcast” can be received.

  As described above, in the first embodiment of the present invention, the search order of the relay station channel list is rearranged in the order of the channel selected / received most recently, especially when traveling on the same route. The channel search time when moving in the reception area can be shortened, and the program viewing interruption time can be shortened.

  Note that the initial value of the search order in the relay station channel list of each broadcasting station (setting value at the time of factory shipment or setting value at the time of device reset), for example, starts with the channel of the master station that can expect the widest reception area. The order of the other channels arranged may be the order of relay stations with a wide reception area or the order described in the NIT.

  In the first embodiment of the present invention, the channel search start timing is set when the reception state of the viewing program is deteriorated. However, an electronic map storing the reception area of each relay station is stored in advance. The channel search may be started when the current position is out of the reception area of the relay station from the GPS position information. Alternatively, the channel search may be started when the current position is outside the reception area of the relay station and the reception state of the viewing program is deteriorated.

  In the first embodiment of the present invention, the relay station channel list is rearranged in the order of the most recently received channel, but if it has been visited in a place that has never been visited in the past, The channels that can be received at the location are arranged behind the relay station channel list, and the search may take a long time. For example, if there is a conventional method of searching the relay station channel list in the order of physical channels, there is a possibility that the search time will be significantly slower than the conventional method. A method for reducing this problem will be described with reference to FIG.

FIG. 10 shows how the relay station channel list is rearranged with boxes for storing priority channels. As shown in FIG. 10, the received channel (19 channels) is stored at the head of the priority channel. The 35 channels stored at the top are transferred to the second priority channel. The 24 channels stored in the second position are returned to the normal position. The normal position is, for example, the conventional channel search order or the order described in the NIT. In the search, first, the channels stored in the priority channel box are searched in order from the top, and then the channels stored in the normal position are searched in order. By this method, there is a merit that it is possible to keep the delay for the search time of the priority channel at the maximum as compared with the conventional method of searching according to the normal position. Here, 35 and 24 channels are initially selected as priority channels. For example, when a broadcast receiving apparatus is manufactured, it is preferable to select and preset a channel having the widest reception range in the area. You can also select and preset the channel of the parent station in that area.
In the above description, the number of boxes for storing priority channels has been described as two, but it may be one to three or more.

  The embodiment used so far is an example, and does not limit the present invention. For example, an example in which various changes are made to the block configuration diagram and the flowchart within the spirit of the present invention can be considered, and any of them is within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Broadcast antenna, 11 ... Broadcast receiving part, 12 ... Electronic map memory | storage part, 13 ... GPS antenna, 14 ... GPS receiving part, 15 ... Information storage part, 16 ... Channel information acquisition part, 17 ... Channel selection control part, 30 31 ... Broadcasting station table, 90 ... Adjacent area table.

Claims (7)

A broadcast receiving apparatus for selecting and receiving broadcast radio waves from a plurality of broadcast stations,
A broadcast receiver for receiving and selecting broadcast radio waves from multiple broadcast stations;
A location information acquisition unit for acquiring current location information;
At least an area identification ID for identifying an area where the broadcasting station is broadcasting, a network ID for identifying the broadcasting station allocated to each broadcasting station, and the broadcasting An information storage unit for storing a broadcast station table in which a series ID for identifying the broadcast station series assigned to each station series and a relay station channel list representing channels relayed by the broadcast station are associated with each other;
A channel selection control unit for instructing a channel selection channel to the broadcast reception unit based on the relay station channel list of the specific broadcast station acquired from the information storage unit, and determining a reception state of each channel;
The tuning control unit is
Determine the reception status of the channel currently being received,
As a result of the determination of the reception state, when it is determined that the reception state is not good, a first channel that detects a channel whose network ID matches the channel being received from the broadcast radio wave is detected based on the broadcast station table. Channel search for
In the first channel search, if a channel with the same network ID is not detected, the current position is determined based on the current position information acquired by the position information acquisition unit and the area identification ID included in the broadcast station table. A second channel search is performed to detect from the broadcast radio wave a broadcast area and a channel whose sequence ID matches the channel being received.
A broadcast receiving apparatus that controls the broadcast receiving unit and the information storage unit to select a channel to be selected and set as a channel to be received when a matching channel is detected in the second channel search . A broadcast receiver for receiving and selecting broadcast radio waves from multiple broadcast stations;
A location information acquisition unit for acquiring current location information;
At least an area identification ID for identifying an area where the broadcasting station is broadcasting, a network ID for identifying the broadcasting station allocated to each broadcasting station, and the broadcasting An information storage unit for storing a broadcast station table in which a series ID for identifying the broadcast station series assigned to each station series and a relay station channel list representing channels relayed by the broadcast station are associated with each other;
In a broadcast receiving apparatus provided with a channel selection control unit that instructs a channel selection to the broadcast reception unit based on the relay station channel list of a specific broadcast station acquired from the information storage unit and determines a reception state of each channel A broadcast receiving method,
A reception state determination step for determining a reception state of a channel currently being received;
As a result of the determination in the reception state determination step, if it is determined that the reception state is not good, a channel whose network ID matches the channel being received is detected from the broadcast radio wave based on the broadcast station table. A first search step,
In the first search step, when a channel with the same network ID is not detected, the current location is set as a broadcast region based on the current location information and the region identification ID, and the channel being received and the A second search step for detecting a channel with a matching sequence ID from the broadcast radio wave;
A broadcast receiving method comprising: selecting and receiving a channel when a matching channel is found in the second search step. A broadcast receiving apparatus for selecting and receiving broadcast radio waves from a plurality of broadcast stations,
A broadcast receiver for receiving and selecting broadcast radio waves from multiple broadcast stations;
At least an area identification ID for identifying an area where the broadcasting station is broadcasting, a network ID for identifying the broadcasting station allocated to each broadcasting station, and the broadcasting A sequence ID for identifying a sequence of the broadcast station allocated to each sequence of stations is associated with a relay station channel list representing channels relayed by the broadcast station, and is selected with priority among the channels. An information storage unit for storing a broadcast station table representing a channel;
A channel selection control unit for instructing a channel selection channel to the broadcast reception unit based on the relay station channel list of the specific broadcast station acquired from the information storage unit, and determining a reception state of each channel;
The tuning control unit is
Determine the reception status of the channel currently being received,
As a result of the determination of the reception state, when it is determined that the reception state is not good, a channel search for detecting a new viewable channel from the broadcast radio wave based on the broadcast station table is performed,
When a new viewable channel is detected in the channel search, the broadcast receiving unit is instructed to select and receive the channel,
Store as a channel selected preferentially in the broadcasting station table of the information storage unit,
When performing the channel search, the broadcast receiving apparatus controls the broadcast receiving unit and the information storage unit so that the channel selected with priority is searched first.   4. The broadcast receiving apparatus according to claim 3, wherein when the channel search is performed, the channel selection control unit controls the broadcast receiving unit and the information storage unit to perform a search by excluding the channel being received. A broadcast receiver characterized by that.   4. The broadcast receiving apparatus according to claim 1 or 3, wherein the relay station channel list stored in the information storage unit is stored so as to first search for a broadcast channel of a master station of each broadcast in its initial setting. A broadcast receiving apparatus characterized by the above. A broadcast receiver for receiving and selecting broadcast radio waves from multiple broadcast stations;
A location information acquisition unit for acquiring current location information;
At least an area identification ID for identifying an area where the broadcasting station is broadcasting, a network ID for identifying the broadcasting station allocated to each broadcasting station, and the broadcasting For each of the area identification IDs, a sequence ID for identifying the sequence of the broadcast station allocated for each station sequence, a broadcast station table in which a list of relay station channels representing channels relayed by the broadcast station is associated, and the area identification ID An information storage unit that stores a database that associates the adjacent areas;
A method receiving apparatus comprising: a channel selection control unit that instructs a channel selection channel to the broadcast reception unit based on the relay station channel list of a specific broadcast station acquired from the information storage unit and determines a reception state of each channel A broadcast receiving method,
The tuning control unit is
An adjacent area detection step of acquiring the current position information from the position information acquisition unit and detecting an adjacent area of the current broadcast area based on the database stored in the information storage unit;
Based on the broadcast station table stored in the information storage unit, it is determined whether or not there is a broadcast station having the same sequence ID as the currently received channel in the adjacent area detected in the adjacent area detection step. A broadcasting station determination step;
As a result of the broadcast station determination step, if it is determined that there is a broadcast station having the same sequence ID, a channel search is performed by instructing a channel selection based on the relay station channel list of the corresponding broadcast station, A channel determination step of determining whether or not a channel that is currently received and a channel having the same sequence ID is detected;
As a result of the determination in the channel determination step, when a channel with the same sequence ID is detected, the channel is selected and set as a channel for reception.   A broadcast receiving apparatus that selects and receives broadcast radio waves from a plurality of broadcast stations, starts channel search when it is difficult to receive a program being viewed, and detects a viewable channel by the channel search. In the case, the broadcast receiving apparatus is characterized in that the channel is selected and received, and thereafter, when a channel search is performed, the search is started from the channel.

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