JP4850681B2 - Communication terminal and channel determination method. - Google Patents

Description

  The present invention relates to a communication terminal and a channel determination method.

When a device capable of receiving broadcast waves is moved to another location, the receivable channel (physical channel) may change. In this case, it is necessary to change the channel setting so that the device can receive a channel that can be received at the destination. A technique for performing such channel resetting is conventionally known. For example, Patent Document 1 below describes a terrestrial digital broadcast receiver that scans broadcast signals at all frequencies, detects reception intensity at each frequency, and creates a list of receivable channels based on the detection result. ing. Currently, one-segment broadcasting for broadcasting a program toward a mobile communication terminal such as a mobile phone is performed. However, the method of the terrestrial digital broadcast receiver can be implemented in a mobile communication terminal.
JP 2006-13945 A

  However, in the terrestrial digital broadcast receiver described in Patent Document 1, since it is necessary to scan the broadcast signal once at all frequencies (all scans), it takes a long time to create a list of receivable channels. End up. When the above method is adopted for a mobile communication terminal, if the mobile communication terminal is moved to an area where the channel system is different, the mobile communication terminal cannot immediately respond to the channel system at the destination, and the user of the mobile communication terminal May temporarily be unable to watch the program. In addition, when all the scans are performed, part of the channel information that should be originally acquired is not acquired because the radio wave condition is unstable, and as a result, an incomplete channel list may be created.

  The present invention has been made to solve the above problems, and provides a communication terminal and a channel determination method capable of providing a channel list at a moving destination in a shorter time without performing a full scan. Objective.

The communication terminal of the present invention selects a physical channel, storage means for storing one or more channel lists including a plurality of channel information indicating a combination of a physical channel and broadcast content information related to the broadcast content corresponding to the physical channel, and a physical channel The channel selection means, the acquisition means for acquiring the broadcast content information from the broadcast wave corresponding to the physical channel selected by the channel selection means, and the channel selection means from one or a plurality of channel lists stored in the storage means Determining means for extracting a channel list including channel information indicating a combination of the selected physical channel and the broadcast content information acquired by the acquiring means, and determining the channel list as a currently receivable channel list; and determining means When multiple channel lists are extracted by, multiple extracted channel lists Difference derivation means for deriving a difference between a plurality of channel lists extracted by comparing channel information in the channel selection means, channel selection means tune the next physical channel from the difference derived by the difference derivation means, The acquisition means acquires broadcast content information from the broadcast wave corresponding to the physical channel next selected by the channel selection means, and the determination means determines the physical channel selected next from the plurality of extracted channel lists. A channel list including channel information indicating a combination with broadcast content information acquired next by the acquisition means is extracted .

The channel determination method of the present invention also includes a storage step in which the communication terminal stores one or a plurality of channel lists including a plurality of channel information indicating combinations of physical channels and broadcast content information related to the broadcast content corresponding to the physical channels. The communication terminal selects a physical channel, the acquisition step of acquiring broadcast content information from the broadcast wave corresponding to the physical channel selected in the channel selection step, and the communication terminal, From one or a plurality of channel lists stored in the storing step, extract a channel list including channel information indicating a combination of the physical channel selected in the tuning step and the broadcast content information acquired in the acquiring step, The channel list is determined as a channel list that can be currently received. A determining step that the difference of the communication terminal, when the channel list at decision step is more extracted derives the difference between a plurality extracted channel list by comparing a channel information between a plurality extracted channel list In the channel selection step, the communication terminal selects the next physical channel from the difference derived in the difference derivation step, and in the acquisition step, the communication terminal is selected next in the channel selection step. The broadcast contents information is acquired from the broadcast wave corresponding to the physical channel, and in the determination step, the communication terminal receives the next selected physical channel from the plurality of extracted channel lists and the broadcast acquired in the acquisition step. A channel list including channel information indicating a combination with content information is extracted.

  According to such a communication terminal and channel determination method, first, broadcast content information is acquired from a broadcast wave corresponding to a physical channel. Then, based on channel information indicating a combination of these physical channels and broadcast content information, a channel list including the channel information is extracted from one or a plurality of channel lists, and the channel list is determined as a currently receivable channel list. Is done. In this way, the currently receivable channel list can be determined based only on the channel information corresponding to the acquired broadcast content information, so the channel list at the destination can be provided in a shorter time without having to scan all of the channels. It becomes possible to do. At this time, since the determined channel list includes all the selectable (receivable) physical channels, there is no possibility that the user of the communication terminal uses the incomplete channel list. In addition, since it is not necessary to change the broadcast wave to be received, the channel list can be provided more easily.

  In this case, the next physical channel is selected from the difference between the plurality of extracted channel lists, and broadcast content information corresponding to the physical channel is acquired. A channel list is further extracted from the extracted channel list based on channel information indicating a combination of these physical channels and broadcast content information. As a result, it is not necessary to select all physical channels when narrowing down a plurality of extracted channel lists to a specific channel list, and it becomes possible to specify a destination channel list with minimum channel selection. As a result, a specific channel list can be provided in a shorter time. Further, when selecting the next physical channel, it is sufficient to compare channel information between the extracted plurality of channel lists and extract a difference between these channel lists, so that the processing is simple.

  In the communication terminal according to the present invention, the difference derivation means uses the channel information between the plurality of extracted channel lists for channel information having the same physical channel in the channel information and different broadcast content information in the channel information. Preferably, the channel selection unit selects the physical channel of the channel information as the difference derived by the difference deriving unit as the next physical channel.

  In this case, since the difference is derived based on the common physical channel in the channel information between the channel lists, the processing is simpler.

In the communication terminal of the present invention, when the channel list stored in the storage unit does not correspond to the current position of the communication terminal because the channel list stored in the storage unit cannot determine a currently receivable channel list, An interface for selecting one channel list from the channel list may be presented to the user of the communication terminal, and the channel list selected by the user may be determined as a currently receivable channel list.
In the communication terminal of the present invention, the storage means further stores the past use history of the channel list, and the determination means does not match each channel list stored in the storage means with the current position of the communication terminal. When the currently receivable channel list cannot be determined, the most frequently used channel list may be selected from the last extracted plurality of channel lists based on the usage history.
In the communication terminal according to the present invention, each channel list is associated with information for identifying an area where the channel list can be received, and the determination unit stores each channel list stored in the storage unit. When a currently receivable channel list cannot be determined because it does not correspond to the current position, a channel list in a region adjacent to the current position may be selected from among the plurality of channel lists extracted last.
In the communication terminal of the present invention, it is preferable that the broadcast content information includes broadcaster information. Since broadcaster information can be easily obtained from broadcast waves, the channel list can be extracted more easily.

  According to such a communication terminal and channel determination method, the channel list at the destination can be provided in a shorter time without performing a full scan.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  First, a mobile phone (communication terminal) 10 according to the embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a functional configuration of a mobile phone 10 according to the embodiment. The mobile phone 10 can receive a broadcast wave of a television program transmitted from the broadcasting facility 20 and display the television program. Note that the form in which the mobile phone 10 receives a television program is not limited to this, and for example, the mobile phone 10 may receive a television program distributed via a communication line such as the Internet.

  The cellular phone 10 includes a receiving unit 11, a display unit 12, a broadcast content information acquisition unit (acquisition unit) 13, a storage unit (storage unit) 14, a channel list determination unit (determination unit) 15, and a difference derivation unit as functional components. (Difference derivation means) 16 and a channel selection unit (channel selection means) 17 are provided.

  The receiving unit 11 receives a broadcast wave transmitted from the broadcast facility 20 via the antenna ANT and decodes the broadcast wave. Then, the reception unit 11 outputs the decoded signal, that is, the data of the television program to the display unit 12 and the broadcast content information acquisition unit 13.

  The display unit 12 processes the TV program data input from the receiving unit 11 and displays the TV program on the screen. Thereby, the user of the mobile phone 10 can view the television program.

  The broadcast content information acquisition unit 13 acquires broadcast content information regarding the broadcast content from the data of the television program input from the reception unit 11. Since the TV program data received by the broadcast content information acquisition unit 13 is obtained by decoding a broadcast wave corresponding to a physical channel selected by the channel selection unit 17 described later, the broadcast content information acquisition unit 13 It can be said that it is a part which acquires broadcast content information from a broadcast wave. Then, the broadcast content information acquisition unit 13 generates channel information by combining the selected physical channel and the acquired broadcast content information, and outputs the generated channel information to the channel list determination unit 15.

  The channel information indicates a combination of a physical channel and broadcast content information related to the broadcast content corresponding to the physical channel. The broadcast content information includes a sequence ID for identifying a broadcast sequence and a service ID for identifying a service. And broadcast company information for specifying a broadcast company is formed by series ID and service ID. Therefore, the channel information is, for example, a physical channel, a sequence ID, and a service ID associated with each other. For example, the broadcast content information acquisition unit 13 acquires broadcast content information having a sequence ID “series 1” and a service ID “0001”, and channel information that is a combination of this broadcast content information and the physical channel “14ch”. Is generated and output.

  The storage unit 14 stores one or a plurality of channel lists that are sets of channel information. Again, the channel information is represented by a combination of a physical channel and broadcast content information having a sequence ID and a service ID. For example, the storage unit 14 stores channel lists A to E as shown in FIG. Each channel list A to E can have channel information for each of the physical channels 13 to 62. For example, the channel list A has channel information for physical channels “14ch”, “18ch”, “22ch”, “24ch”, and “25ch”. In FIG. 2, only the physical channels 13 to 30 are shown for simplicity. In FIG. 2, for convenience, the lists A to E are arranged side by side, and the physical channel column is shown only in the leftmost column of the table as common to each channel list.

  The channel list determination unit 15 uses the channel information input from the broadcast content information acquisition unit 13 to extract a channel list including the channel information from the channel list stored in the storage unit 14. Then, the channel list determination unit 15 determines one channel list as a currently receivable channel list. Here, the currently receivable channel list is a channel list provided as an option when the user of the mobile phone 10 selects a television program (channel) to be viewed. For example, the currently receivable channel list is displayed on the display unit 12 so that the user of the mobile phone 10 can select a channel.

  For example, the channel list stored in the storage unit 14 is shown in FIG. 2, and channel information in which a physical channel “15ch”, a sequence ID “sequence 4”, and a service ID “0021” are associated with each other is shown. When input from the broadcast content information acquisition unit 13, the channel list determination unit 15 extracts the channel list C including the channel information and determines the channel list C as a currently receivable channel list.

  However, when there are a plurality of extracted channel lists, it is necessary to determine one channel list. In order to determine one channel list, it is necessary to give another channel information to the channel list determination unit 15. In the following, a description will be given of a process of giving different channel information to the channel list determination unit 15 and determining one channel list from the extracted plurality of channel lists. In order to perform this process, the difference deriving unit 16 and the channel selecting unit 17 are used.

  When a plurality of channel lists are extracted by the channel list determination unit 15, the channel list determination unit 15 outputs the plurality of channel lists extracted by itself to the difference deriving unit 16. For example, the channel list stored in the storage unit 14 is shown in FIG. 2, and channel information in which a physical channel “14ch”, a sequence ID “sequence 1”, and a service ID “0001” are associated with each other is shown. When input from the broadcast content information acquisition unit 13, the channel list determination unit 15 outputs the channel lists A, B, D, and E including the channel information to the difference deriving unit 16 (see FIG. 3).

  The difference deriving unit 16 derives a difference between a plurality of channel lists input from the channel list determining unit 15. Specifically, the difference deriving unit 16 compares channel information among a plurality of channel lists, selects a physical channel having a difference, and outputs the physical channel to the channel selection unit 17. For example, when the channel lists A, B, D, and E shown in FIG. 3 are input from the channel list determination unit 15, the difference deriving unit 16 searches the physical channels in ascending order, and broadcast content information between these channel lists. Are acquired, and the physical channel “18ch” is output to the channel selection unit 17 (see FIG. 4).

  The channel selection unit 17 performs channel selection so that the reception unit 11 receives a broadcast wave corresponding to the physical channel input from the difference deriving unit 16. Thereby, the receiving part 11 can receive the broadcast wave corresponding to the physical channel. That is, the channel selection unit 17 selects the next physical channel from the difference derived by the difference deriving unit 16. Further, the channel selection unit 17 selects a physical channel to be received in accordance with a channel change instruction given by a viewer of the mobile phone 10 via an input unit (not shown).

  Thereafter, the receiving unit 11 receives a broadcast wave corresponding to the physical channel selected by the channel selection unit 17 (the physical channel derived by the difference deriving unit 16), decodes the broadcast wave, and broadcasts the data of the TV program. The information is output to the content information acquisition unit 13. The broadcast content information acquisition unit 13 acquires broadcast content information from the data, generates channel information based on the selected physical channel and the acquired broadcast content information, and determines the generated channel information as a channel list. To the unit 15. That is, the broadcast content information acquisition unit 13 acquires broadcast content information from the broadcast wave corresponding to the physical channel that is next selected by the channel selection unit 17. Thereafter, the channel list determination unit 15 extracts a channel list including channel information newly input from the broadcast content information acquisition unit 13 from a plurality of already extracted channel lists. That is, the channel list determination unit 15 indicates a combination of the physical channel next selected by the channel selection unit 17 and the broadcast content information acquired next by the broadcast content information acquisition unit 13 from the plurality of extracted channel lists. A channel list including channel information is extracted.

  For example, as described above, as a result of the channel selection unit 17 selecting the physical channel “18ch”, channel information in which the physical channel “18ch”, the sequence ID “sequence 2”, and the service ID “0013” are associated with each other is obtained. When input to the channel list determination unit 15, the channel list determination unit 15 determines that the channel list B is a currently receivable channel list (see FIG. 4).

  On the other hand, when channel information in which the physical channel “18ch”, the sequence ID “sequence 2”, and the service ID “0011” are associated with each other is input to the channel list determination unit 15, the channel list determination unit 15 The channel lists A, D and E are output to the difference deriving unit 16 (see FIG. 4). In this case, the selection of the physical channel by the difference deriving unit 16, the selection of the physical channel by the channel selection unit 17, the decoding of the broadcast wave corresponding to the physical channel by the reception unit 11, and the broadcast content information acquisition unit 13 Acquisition of broadcast content information corresponding to a broadcast wave, output of channel information including the broadcast content information, and extraction of a channel list including the channel information by the channel list determination unit 15 are executed at least once. Finally, one of the channel lists A, D, and E is determined as a currently receivable channel list.

  Note that, depending on the current position of the mobile phone 10, since the television broadcast corresponding to the physical channel selected by the difference deriving unit 16 is not provided, the receiving unit 11 cannot receive the broadcast wave corresponding to the physical channel. There is. In this case, the difference deriving unit 16 selects a physical channel that has a difference between a plurality of channel lists and has not been selected, and outputs the physical channel to the channel selection unit 17.

  For example, when the channel lists A, D, and E are extracted from the channel list group shown in FIG. 4 based on the channel information corresponding to the physical channels “14ch” and “18ch”, the difference deriving unit 16 next selects the physical list. Select channel “21ch”. However, when the mobile phone 10 exists in an area where the channel list A can be received, the receiving unit 11 cannot receive a broadcast wave corresponding to the physical channel “21ch”. In this case, the difference deriving unit 16 selects a physical channel “22ch” that is different between channels A, D, and E and is not selected, and outputs this physical channel to the channel selecting unit 17 (see FIG. 5). .

  Further, depending on the current position of the mobile phone 10, each channel list stored in the storage unit 14 does not correspond to the current position, so that the channel list determination unit 15 cannot determine a channel list that can be currently received. There is a case. In this case, the channel list determination unit 15 provides a plurality of channel lists extracted last (or only the name of the channel list) and an interface for allowing the user of the mobile phone 10 to determine one channel list. The instruction is output to the display unit 12. The display unit 12 displays an interface for determining one channel list from a plurality of channel lists based on the channel list and instructions input from the channel list determination unit 15. Then, the channel list determination unit 15 determines the channel list selected by the user of the mobile phone 10 as a currently receivable channel list.

  For example, when there is no mobile phone 10 in any of the regions corresponding to each of the channel lists A to E stored in the storage unit 14, the channel list determination unit 15 determines a channel list that can be currently received. I can't. Therefore, the channel list determination unit 15 outputs a plurality of channel lists extracted last from the channel lists A to E and an instruction to provide the interface to the display unit 12. In this case, since the channel list determination unit 15 cannot extract the channel list at all, the channel list determination unit 15 outputs all the channel lists A to E stored in the storage unit 14 to the display unit 12. It can happen.

  Next, the operation of the mobile phone 10 shown in FIG. 1 will be described with reference to FIGS. 6 and 7, and the channel determination method according to the present embodiment will be described. FIG. 6 is a flowchart showing channel determination processing by the mobile phone 10, and FIG. 7 is a flowchart showing details of the narrowing-down processing shown in FIG.

  First, the channel selection unit 17 selects a designated physical channel (step S11, channel selection step). At this time, how to select a physical channel is not limited. For example, the channel may be selected according to the channel selection by the user of the mobile phone 10, or the channel detected first by detecting the physical channel in ascending order may be selected.

  Next, the broadcast content information acquisition unit 13 acquires broadcast content information from the broadcast wave received by the reception unit 11 (step S12, acquisition step). Then, the channel list determination unit 15 searches (extracts) the channel list stored in the storage unit 14 (storage step) using the channel information generated by the broadcast content information acquisition unit 13 (step S13, determination). Step). At this time, if the number of searched channel lists is one (step S14; YES), the channel list is determined as a currently receivable channel list (step S15, determination step). On the other hand, if the number of retrieved channel lists is plural (step S14; NO), a narrowing process for determining one channel list from the plural channel lists is performed (step S16).

  Details of the narrowing-down process are as follows. First, the difference deriving unit 16 compares the channel lists searched by the channel list determining unit 15 for each physical channel, and derives a difference between a plurality of channel lists (step S161). And the channel selection part 17 selects a physical channel with a difference between channel lists based on the difference (step S162). When the receiving unit 11 can receive the broadcast wave corresponding to the physical channel (step S163; YES), the broadcast content information acquiring unit 13 acquires the broadcast content information corresponding to the broadcast wave (step S164). The channel list determination unit 15 further searches the extracted channel list using the channel information generated by the broadcast content information acquisition unit 13 (step S165). If the number of searched channel lists is 1 (step S166; YES), the channel list determination unit 15 determines that the channel list is a currently receivable channel list (step S167). On the other hand, when the number of searched channel lists is plural (step S166; NO), the process returns to step S161.

  When the receiving unit 11 cannot receive the broadcast wave corresponding to the physical channel selected by the channel selecting unit 17 (step S163; NO), the difference deriving unit 16 has a difference between a plurality of channel lists and is not selected. It is determined whether or not the physical channel of the station exists (step S168; YES). At this time, if there is an unselected physical channel (step S168; YES), the process returns to step S162. On the other hand, if there is no unselected physical channel (step S168; NO), an interface for allowing the user of the mobile phone 10 to determine one channel list is displayed on the display unit 12, and the user's selection is selected. Thus, a currently receivable channel list is determined (step S169).

  According to the mobile phone 10 according to the present embodiment, first, the broadcast content information acquisition unit 13 acquires the broadcast content information from the broadcast wave corresponding to the physical channel. Based on channel information indicating a combination of these physical channels and broadcast content information, a channel list including the channel information is extracted from one or a plurality of channel lists by the channel list determination unit 15. Then, the channel list determination unit 15 determines that the channel list is a currently receivable channel list. In this way, the currently receivable channel list can be determined based only on the channel information corresponding to the acquired broadcast content information, so the channel list at the destination can be provided in a shorter time without having to scan all of the channels. It becomes possible to do. At this time, since the determined channel list includes all the selectable (receivable) physical channels, there is no possibility that the user of the mobile phone 10 uses the incomplete channel list. In addition, if the channel list is determined with only one channel information, it is not necessary to change the broadcast wave to be received (since it is not necessary to select a channel), it is possible to provide the channel list more easily. .

  Further, according to the mobile phone 10 according to the present embodiment, the next physical channel is selected from the difference between the channel lists derived by the difference deriving unit 16, and broadcast content information corresponding to the physical channel is acquired. . Then, a channel list is further extracted from the extracted channel list based on channel information channel information indicating a combination of these physical channels and broadcast content information. This eliminates the need to select all channels when narrowing down a plurality of extracted channel lists to a specific channel list, and enables the channel list to be moved to be specified with a minimum selection. As a result, a specific channel list can be provided in a shorter time. Further, when selecting the next physical channel, it is sufficient to compare channel information between the extracted plurality of channel lists and extract a difference between these channel lists, so that the processing is simple.

  Also, according to the mobile phone 10 according to the present embodiment, the difference is derived based on the common physical channel in the channel information between the channel lists, so that the process is simpler. Furthermore, in this embodiment, since broadcast content information including broadcast provider information that can be easily obtained from broadcast waves is used, it becomes possible to more easily extract a channel list.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. The present invention can be modified in various ways as described below without departing from the scope of the invention.

  In the above embodiment, when the channel list determination unit 15 cannot determine a currently receivable channel list from a plurality of channel lists, the display unit 12 determines one channel list for the user of the mobile phone 10. Although the interface for making it appear is displayed, the processing in this case is not limited to this.

  For example, after the past usage history of the channel list is stored in the storage unit 14, the channel list determination unit 15 may automatically select the channel list having the highest usage frequency among the extracted channel lists. . Applying a predetermined channel list determination method (selecting the most frequently used channel list, selecting the most recently used channel list, etc.) to the past usage history, burdens the user of the mobile phone 10 It is possible to determine a single channel list that has a high possibility of being received at present.

  In addition, information identifying an area where the channel list can be received is associated with the channel list, and a channel list of an area adjacent to the current position of the mobile phone 10 (area corresponding to the channel list that the mobile phone 10 actually receives) is displayed. You may make it select. By using this method, a channel list that is highly likely to be received can be determined as a currently receivable channel list.

  In the above embodiment, the time when the channel list determination unit 15 determines the currently receivable channel list is not limited, but the determination time may be limited. For example, the above-described processing may be performed when the user of the mobile phone 10 changes the channel via an input unit (not shown). In addition, when the mobile phone 10 is equipped with a detection unit (not shown) for detecting the reception level at the reception unit 11 and the reception level detected by the detection unit becomes a predetermined value or less or a predetermined value or more. You may perform the above-mentioned process. In this way, by limiting the timing for determining the currently receivable channel list, it is possible to reduce the power consumption of the mobile phone 10 required for the above-described processing.

  In the above embodiment, the mobile phone 10 is used as a communication terminal. However, a simple mobile phone (PHS: Personal Handy-phone System) or a portable information terminal (PDA: Personal Digital Assistant) is used as a communication terminal. May be.

  In the above embodiment, the receiving unit 11 receives a broadcast wave of a television broadcast, but may receive a broadcast wave of a radio broadcast. In other words, the currently receivable channel list determined by the channel list determination unit 15 is not limited to that relating to television broadcasting, but may be related to radio broadcasting.

It is a figure which shows the function structure of the mobile telephone which concerns on embodiment. It is a figure which shows the example of the channel list stored in the storage part shown in FIG. FIG. 3 is a diagram illustrating a process of determining a currently receivable channel list from the channel list illustrated in FIG. 2. FIG. 3 is a diagram illustrating a process of determining a currently receivable channel list from the channel list illustrated in FIG. 2. FIG. 3 is a diagram illustrating a process of determining a currently receivable channel list from the channel list illustrated in FIG. 2. It is a flowchart which shows the channel determination process by the mobile telephone shown in FIG. It is a flowchart which shows the detail of the narrowing-down process shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Mobile phone (communication terminal), 13 ... Broadcast content information acquisition part (acquisition means), 14 ... Storage part (storage means), 15 ... Channel list determination part (determination means), 16 ... Difference derivation part (difference derivation means) ), 17... Channel selection section (channel selection means).

Claims (7)

Storage means for storing one or a plurality of channel lists including a plurality of channel information indicating combinations of physical channels and broadcast content information related to the broadcast content corresponding to the physical channels;
Channel selection means for selecting a physical channel;
An acquisition means for acquiring the broadcast content information from a broadcast wave corresponding to the physical channel selected by the channel selection means;
A channel list including channel information indicating a combination of the physical channel selected by the channel selection unit and the broadcast content information acquired by the acquisition unit from one or a plurality of channel lists stored by the storage unit. Determining means for extracting and determining the channel list as a currently receivable channel list;
A difference deriving unit for deriving a difference between the plurality of extracted channel lists by comparing channel information between the plurality of extracted channel lists when the plurality of channel lists are extracted by the determining unit; ,
The channel selection unit selects the next physical channel from the difference derived by the difference deriving unit,
The acquisition unit acquires the broadcast content information from a broadcast wave corresponding to the physical channel that is next selected by the channel selection unit,
The determining unit extracts a channel list including channel information indicating a combination of the next selected physical channel and the broadcast content information acquired next by the acquiring unit from the plurality of extracted channel lists. ,
Communication terminal. The difference derivation means, as channel information between the plurality of extracted channel lists, uses channel information having the same physical channel of the channel information and different broadcast content information of the channel information as a difference between the channel lists. Derived,
The communication terminal according to claim 1 , wherein the channel selection unit selects a physical channel of channel information as a difference derived by the difference deriving unit as a next physical channel. When the determination unit cannot determine the currently receivable channel list because each channel list stored in the storage unit does not correspond to the current position of the communication terminal, the determination unit determines from the channel lists extracted last. An interface for selecting one channel list is presented to the user of the communication terminal, and the channel list selected by the user is determined as the currently receivable channel list.
The communication terminal according to claim 1 or 2. The storage means further stores a past use history of the channel list;
If the channel list stored in the storage unit cannot determine the currently receivable channel list because each channel list stored in the storage unit does not correspond to the current position of the communication terminal, finally, based on the usage history Select the most frequently used channel list from the extracted channel lists.
The communication terminal according to claim 1 or 2. Each channel list is associated with information for identifying an area where the channel list can be received,
If the channel list stored in the storage unit cannot determine the currently receivable channel list because each channel list stored in the storage unit does not correspond to the current position of the communication terminal, the plurality of channel lists extracted last Of these, select the channel list of the area adjacent to the current position.
The communication terminal according to claim 1 or 2. The communication terminal according to any one of claims 1 to 5 , wherein the broadcast content information includes broadcaster information. A storage step in which the communication terminal stores one or a plurality of channel lists including a plurality of channel information indicating combinations of physical channels and broadcast content information related to the broadcast content corresponding to the physical channels;
A channel selection step in which the communication terminal selects a physical channel; and
The communication terminal acquires the broadcast content information from a broadcast wave corresponding to the physical channel selected in the channel selection step;
Channel information indicating a combination of the physical channel selected in the channel selection step and the broadcast content information acquired in the acquisition step from the channel list stored in the storage step by the communication terminal. A channel list including, and determining the channel list as a currently receivable channel list ;
The communication terminal derives a difference between the plurality of extracted channel lists by comparing channel information between the plurality of extracted channel lists when a plurality of the channel lists are extracted in the determining step. Derivation step and
Including
In the channel selection step, the communication terminal selects the next physical channel from the difference derived in the difference derivation step,
In the acquisition step, the communication terminal acquires the broadcast content information from a broadcast wave corresponding to a physical channel that is next selected in the channel selection step,
In the determining step, the communication terminal includes channel information indicating a combination of the physical channel selected next from the plurality of extracted channel lists and the broadcast content information acquired next in the acquiring step. Extract channel list,
Channel determination method.

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