JP2005079861A - Apparatus and method for receiving ground wave digital broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a place of a residence where a receiving apparatus is installed, based on an actually received broadcasting signal. <P>SOLUTION: A method for receiving ground wave digital broadcasting includes a step of sequentially searching a channel-selection channel by a tuner 13, a step of separating additional information transmitted by multiplex by ground wave digital broadcasting from a transport stream obtained by demodulating the received broadcasting signal, and a step of extracting local area identification information. When the searching of all channels is finished, a local area in line with a broadcasting receiving environment is specified by operation from a plurality of acquired local area identification information, the specified local area is decided as a residence local area, and numeric keys of a remote controller 16 are aligned based on the decided residence local area. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a terrestrial digital broadcast receiving apparatus and a receiving method capable of specifying an area where a receiving apparatus is installed using additional information multiplexed and transmitted in terrestrial digital broadcasting.

  Terrestrial television broadcasting is currently being broadcast by analog signals, but at the end of 2003, broadcasting by digital signals started in some regions, and in 2006 it was expanded nationwide. It has been decided. Accordingly, terrestrial analog broadcasting will be abolished in 2011.

  Terrestrial digital broadcasting is carried out using a UHF (Ultra-High Frequency) band, and its channels are from 13 to 62 channels. Therefore, the number of channels is greatly increased with respect to the VHF (Very High Frequency) band in which the current analog broadcasting is standardly implemented.

  In the television broadcasting currently being carried out, the broadcasting channel is fixed for each region, and when the user newly purchases a television receiver or the like, the setting location (residence region) is specified, for example, a zip code or the like By inputting to the receiver, a channel that can be received in the area can be set to the tuning position. For this purpose, the television receiver stores in advance a correspondence table of receivable channels and channel selection positions for each region in Japan.

  In the case of a terrestrial digital broadcast receiver, a broadcaster (broadcast station) or the like of a reception channel can be specified based on additional information multiplexed and transmitted on a broadcast signal. In addition, since a plurality of programs can be broadcast on the same channel, and the broadcasting form is a normal television program and data broadcasting is also performed, the concept of service, not a channel, is used.

  Therefore, immediately after obtaining a terrestrial television receiver, or when the residence is changed due to moving, etc., all channels are searched sequentially, and information for identifying receivable services is acquired. The service is stored as a service list, and thereafter, the service provided based on the service list is selected.

  That is, terrestrial digital broadcasting regulations are established by ARIB (Association of Radio Industries and Businesses). Among them, the functional specifications of the receiver are ARIB TR-B14 “terrestrial digital television. It is shown in the second volume of "John Broadcasting Operation Regulation Technical Documents".

  According to the above technical data, Service_id is described in the service list descriptor and TS (Transport Stream) information descriptor of NIT (Network Information Table) included in the additional information of digital broadcasting, and broadcasting is performed by using this Service_id. It is possible to identify the region and the services provided there.

  FIG. 4 shows the data structure of Service_id. As shown in FIG. 4, Service_id is composed of 16 bits, the 6 bits on the most significant side constitute the area identification data 4a, and the next 1 bit constitutes the prefecture multiple flag 4b. Further, the next 2 bits constitute the service type 4c, the next 4 bits constitute the area identifier identification 4d, and the least significant 3 bits constitute the service number 4e.

  The area identification data 4a specifies an area with a code of 0 to 64. As shown in FIG. 5, 0 to 9 indicate a wide area broadcast, and 10 to 63 indicate a prefectural area (prefecture station) broadcast. More specifically, as shown in FIG. 6, wide-area broadcasting includes, in addition to Kanto, Kinki, and Chukyo, Hokkaido, Okayama Kagawa, and Shimane Tottori. In addition, prefectural broadcasting is divided into 6 prefectures and Hokkaido.

  Further, as shown in FIG. 7, the prefectural compound flag 4b shown in FIG. 4 is the first in the case where “0” transmits one TS or two TSs in the area specified by the area identification data 4a. “1” is data for specifying the second TS when two TSs are transmitted by the same operator in the area identification data 4a.

  Furthermore, the service type 4c is data indicating the type of broadcast. As shown in FIG. 8, “0” indicates a television type service, and “1” or “2” indicates a data type excluding the partial reception service. “3” indicates a data type service of the partial reception service.

  Furthermore, in the local business operator identification 4d, as shown in FIG. 9, the codes 0 to 15 are used as data for specifying the business operators AP.

  Furthermore, as shown in FIG. 10, the service number 4e is a number that can be set by the service provider for each service type 4c in the TS, as shown in FIG. It is.

  In addition, terrestrial digital broadcasting is designed to follow the current analog broadcasting viewing mode as much as possible, and to reduce the uncomfortable feeling given to the user during the transition. In other words, since the current broadcaster continues to provide services even after digital broadcasting, the remote controller (remote controller and remote controller) installed in the receiver can be used as it is so that the switching function based on the current channel number can be used as it is. The number keys (sometimes abbreviated) are to be assigned so as to match the current analog broadcast channel number.

  The second part of ARIB TR-B14 describes the procedure for acquiring a service list based on the Service_id configured as described above.

(1) First, the user sets a viewer residence area.

(2) In response to a scan start instruction, a channel is searched from channel 13 to channel 62 of the receiver tuner to obtain a service list.

(3) In the NIT, remote_control_key_id is described, and remote control key numbers 1 to 12 desired by the broadcaster are assigned to each TS. As a result, a representative service for each TS is assigned to the remote control key.

(4) When the same TS is detected, a superior carrier is selected by checking C / N (Carrier / Noise: carrier power to noise power ratio) and EBR ((Bit Error Rate)).

(5) The receiver processing when the same remote control key number is detected is assumed separately.

  Among these items, it is assumed that the setting of the viewer residence area is set by the user on a GUI (Graphical User Interface). As for the service list, if the residence set by the user and the area indicated by the area identification data 4a shown in FIG. 4 obtained from the received signal match, the service is determined to be in-area broadcasting, A service list which is a correspondence table between the service and the physical channel is stored in memory.

  In addition, if the residential area set by the user and the area of the received signal do not match, it is determined that the broadcast is out of service and the service list is stored, but at this time, the numeric keys assigned to the remote controller are If they overlap, the change process is executed so as not to overlap. In the numeric key assignment change processing, the regional broadcasting has priority.

  In addition, for example, if the remote controller key is assigned to Tokyo and its neighboring areas, it can be assigned so that NHK can be received by operating 1, and similarly NHK Educational TV is assigned to 3 and 4 to Japan. TV, 6 TBS, 8 Fuji TV, 10 TV Asahi, 12 TV Tokyo. Accordingly, the channel (broadcast station: broadcaster) can be switched by operating the numeric keys of the remote controller in the same manner as in the current analog broadcasting.

  As another service list acquisition method, note that network_id that bundles multiple service_ids is numbered in consideration of the area identification data as shown in the following equation, and collectively from network_id at the time of scanning. Thus, it is conceivable that the broadcast area of the broadcaster is determined and the service_id stores the service list by paying attention to the service type and the service number.

network_id = 0X7FF0-0X0010 × region identification + region operator identification−0X0400 × prefectural multiple flag The processing for assigning the above-described representative service for each TS to the key of the remote controller is performed on the same physical channel in the acquired service list. It is assumed that a remote controller key is assigned to a typical service_id described in the NIT. However, although the received TS is different, it is also assumed that the remote_control_key_id described in the NIT is the same, and the receiver is configured to preferentially assign the key of the remote controller to the TS determined to be the regional broadcast.

  The process described above will be described with reference to the flowchart of FIG. In FIG. 11, the process starts in step S1101, and in step S1102, a viewer residence area setting process is performed by the user. That is, the area where the receiver is installed is registered in the receiver. Next, channel scanning is started in step S1103, and in step S1104, the reception frequency of the tuner is set to select a predetermined channel, for example, 13 channels. Next, in step S1105, it is determined whether or not the tuner front end is locked. Locking here means that, for example, the received broadcast signal is demodulated and converted to TS, and then the frame is synchronized. Is received.

  If it is confirmed in step S1105 that the front end is locked, the process proceeds to step S1106, where it is determined whether or not the C / N of the received signal is sufficient, and if C / N is sufficient. In step S1107, it is confirmed that there is a broadcast signal that can withstand viewing on the channel. That is, reception confirmation is performed.

  Next, the process proceeds to step S1108, where it is determined whether or not the final frequency (for example, 62 channels) has been reached. If not, the reception frequency is increased in step S1109 and the process returns to step S1104. In step S1104, the reception frequency of the tuner is set to select the next 14 channels.

  If it is determined in step S1105 that the front end is not locked, it is determined that broadcasting is not being performed on that channel, and steps S1106 and S1107 are skipped and the process proceeds to step S1108. If it is determined in step S1105 that the front end is locked, but if it is determined in step S1106 that the C / N is not sufficient, it is determined that it is not appropriate to determine that channel as a reception channel. Step S1107 is skipped.

  When the above processing is repeated for each channel and the final frequency (62 channels) is reached, a service list is presented in step S1110, and the duplicate key of the remote controller is changed in step S1111. End the process.

  Details of the reception confirmation process (step S1107) in FIG. 11 are shown in FIG. In FIG. 12, reception confirmation processing is started in step S1201, BER is acquired in step S1202, and acquisition and collation of NIT are performed in step S1203. Next, in step S1204, it is determined whether or not the TS_ID has already been acquired. If it is a new TS_ID, an addition process to the service list is executed in step S1205, and the process ends in step S1206.

  If it is determined in step S1204 that the TS_ID has been acquired, it is determined in step S1207 whether or not the BER has been improved. If the BER has not been improved, the process ends. If the BER has been improved, a service list change process is performed in step S1208, and the process ends.

  In a receiver that receives digital terrestrial broadcasting, the above processing is executed to acquire a service list and assign numeric keys of the remote controller. Depending on the user's residence area, the remote controller The assignment of numeric keys may not be performed properly.

  That is, in ARIB, except for Kanto, Chukyo, and Kinki, the region is basically specified in units of prefectures, and when the user lives near the prefectural border, There may be a case where the areas of the service list obtained by actually scanning the channels do not match.

  In such a case, the receiver will process many services as out-of-area broadcasts, and the numeric key assignment of the remote controller takes precedence over the in-area broadcasts, so it is different if no in-area broadcasts are detected. As a result, there are cases where the user has to perform more work for changing the duplicate key.

  As a specific example, since the start time of digital broadcasting varies depending on the region, a user residing in the eastern part of Shizuoka Prefecture where broadcasting will start from 2006 In order to receive the broadcast, the user first sets his / her residence as Shizuoka Prefecture by setting the viewer's residence.

  With this setting, even if broadcasts for the Kanto wide area can be received, since they are recognized as out-of-area broadcasts, the key assignment of the remote controller is performed differently from that for the Kanto wide area. Sometimes.

In addition, the proposal of describing area identification information in NIT and providing a different service for every area is described in Patent Document 1, for example.
Japanese Patent Laid-Open No. 2001-197024 (pages 5 and 6, FIGS. 5 and 7)

  As described above, when the remote controller key assignment is executed using the viewer residence information set by the user and the additional information multiplexed on the broadcast signal, the key assignment is performed when the broadcast outside the area is received. It was not preferable because it might become a situation that had to be changed.

  The present invention has been made in view of the above points, obtains area identification information from actually received broadcast signals, identifies a viewing area based on the area identification information, and executes key assignment of a remote controller. With such a configuration, it is possible to provide a terrestrial digital broadcast receiving apparatus and a receiving method capable of performing a channel switching operation in accordance with the substance.

  The terrestrial digital broadcast receiving apparatus of the present invention is a receiving means for receiving broadcasts of a plurality of broadcasting stations by a tuner for receiving terrestrial digital broadcasts, information acquisition means for acquiring region identification information from the received broadcast signals, And calculating means for calculating a residential area based on the area identification information acquired by the information acquiring means.

  The terrestrial digital broadcast receiving method of the present invention includes a step of receiving broadcasts of a plurality of broadcast stations by a tuner that receives terrestrial digital broadcasts, a step of acquiring region identification information from the received broadcast signals, and this information acquisition And a step of specifying a residential area based on the area identification information acquired by the means.

  In the terrestrial digital broadcast receiving method of the present invention, a step of sequentially switching reception channels of a tuner that receives terrestrial digital broadcast, and a step of determining whether or not a broadcast signal suitable for viewing is received on the switched reception channel. And a step of acquiring region identification information from each of the broadcast signals determined to be suitable for viewing, and a step of specifying a residential area by a majority vote of the acquired region identification information.

  According to the present invention, since the area identification information is obtained from the reception signal of the terrestrial digital broadcast and the residential area is specified based on the area identification information, the residential area according to the actual broadcast can be set. Thus, the assignment of numeric keys of the remote controller can be executed without much trouble.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit configuration diagram showing an embodiment of a terrestrial digital broadcast receiving apparatus (set top box) of the present invention.

  In FIG. 1, a receiving apparatus 10 includes an antenna input terminal 12 that receives a signal caught by an antenna 11 for a UHF band. The antenna input terminal 12 is connected to a tuner 13 where a signal of a predetermined channel is selected from a broadcast signal supplied to the input terminal 12 and converted to an intermediate frequency and output. The tuning operation in the tuner 13 is executed based on a tuning signal supplied from a CPU (Central Processing Unit) 14.

  The CPU 14 is connected to an operation input unit 15 including a plurality of operation buttons that can be operated by the user, and an infrared light receiving unit 17 that receives a remote control (remote control) signal transmitted from the remote controller 16. By operating the operation input unit 15 or the remote controller 16, the CPU 14 generates a channel selection signal and sends it to the tuner 13. The tuner 13 has a function of detecting the C / N of the input signal and sending it to the CPU 14.

  Further, the CPU 14 operates to control the operation and functions of the entire receiving apparatus 10 in response to the operation of the operation input unit 15 and the remote controller 16. Furthermore, a memory 18 is connected to the CPU 14, and a service list described in detail later is stored in the memory 18.

  The output of the tuner 13 is supplied to an ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) decoder 18, where demodulation, error correction, and the like are performed and output as a TS signal. Demodulation is based on OFDM (Orthogonal Frequency Division Multiplexing), and further includes a synchronization reproduction unit for establishing reception synchronization using OFDM frame synchronization information. It means that it is locked. Further, the ISDB-T decoder 18 has a function of detecting the BER of the demodulated digital data and supplying the detected result to the CPU 14.

  The TS signal output from the ISDB-T decoder 19 is descrambled in the descrambler 20 as necessary, and supplied to the TS separator 21.

  The TS separation unit 21 separates and extracts video data and audio data constituting a multiplexed program, and separates and extracts NITs and the like that are multiplexed and transmitted as additional information.

  The video data separated by the TS separation unit 21 is supplied to the video decoder 22, MPEG (Moving Picture Experts Group) decoding is performed, and the uncompressed digital video signal is sent to the graphic processing unit 23. In the graphic processing unit 23, for example, GUI-format OSD (On Screen Display) information supplied from the CPU 14 is superimposed on the output of the video decoder 22 and output from the video output terminal 24.

  The audio data separated by the TS separation unit 21 is decoded by the audio decoder 25 and output from the output terminal 26 as uncompressed digital audio data.

  The TS separation unit 21 is also connected to an IEEE (Institute of Electrical and Electronics Engineers) 1394 I / F (Interface) 27 and connected to a DVD (Digital Versatile Disk) recorder (not shown) connected via a terminal 28. ing.

  Further, the CPU 14 is connected to a card mounting terminal 30 via a card 1 / F 29, and a card type recording medium such as SmartMedia (registered trademark) (not shown) can be mounted on the card mounting terminal 30. Is possible. Furthermore, a communication unit 31 is connected to the CPU 14 to enable data communication using a telephone line via a terminal 32.

  FIG. 2 is a diagram showing a specific key arrangement of the remote controller 16 applied to the receiving apparatus 10 of FIG. The remote controller 16 includes 1 to 12 numeric keys 16a. The numeric key 16a is used to input numeric information in addition to being used as a tuning key for the tuner 13 of the receiving device 10.

  When the number key 16a is applied to channel selection, the function as a one-touch channel selection key corresponding to the remote_control_key_id described in the NIT and the three-digit number assigned to each service are input to select the channel. It has a function as a direct channel selection key for performing.

  Furthermore, the remote controller 16 includes a channel selection switching key 16b, a power key 16c, a program guide key 16d, and a menu key 16e.

  The channel selection switching key 16b is, for example, a key for switching between one-touch channel selection and direct channel selection, the power key 16c is a key for turning on / off the power of the receiving apparatus 10, and the program guide key 16d is a program guide key 16d. Table so-called EPG (Electronic Program Guide) is a key for displaying on the screen, and the menu key 16e is a key for displaying a menu for setting various functions of the receiving device 10.

  Further, the remote controller 16 includes a cursor key 16f, an enter key 16g for registering an item selected by operating the cursor key 16f, and an up / down key 16h for continuously switching channels.

  A process of assigning the numeric key 16a of the remote controller 16 in association with the remote_control_key_id in the receiving apparatus configured as described above will be described.

  In the present invention, the user operates the operation input unit 15 or operates the menu key 16e of the remote controller 16 to display a menu to start channel scanning. For example, the CPU 14 provides a channel selection signal to the tuner 13 so that channel 13 is initially selected. Next, after the channel 14 has been selected, the CPU 14 determines whether reception synchronization has been established based on the OFDM frame synchronization information, that is, whether it has been locked.

  In the Kanto wide area, broadcasting is currently scheduled on 7 channels from 21 to 27, and since there is no broadcast signal on channel 13, the OFDM frame synchronization signal does not exist and is not locked. Therefore, the CPU 14 determines that there is no broadcast signal on the 13th channel, and outputs a channel selection signal to the tuner 13 to select the next 14th channel. Since there are no broadcast signals for 14 channels, the next channel is selected.

  In this way, when channel 21 is selected, reception synchronization is established and locked on this channel based on the OFDM frame synchronization information, and CPU 14 then receives C / N information from tuner 13 to It is confirmed that a good C / N is obtained, and further, it is confirmed that the BER is a low value based on the output data of the ISDB-T decoder 18.

  Further, the CPU 14 separates and extracts the NIT by the TS separation unit 21, reads and decodes service_id described therein, obtains area identification information, and stores it in the memory 18. The area identification information in this case indicates the Kanto wide area. Further, the remote_control_key_id is read from the NIT, decoded to identify the key number, and a service list is generated and stored in the memory 18 so that the service can be received by the remote control signal of the identified key number. At the same time, a three-digit number specifying the received service is also added to the list.

  After that, when the next channel is selected and the presence of the broadcast signal is confirmed, similarly, the TS separation unit 21 separates and extracts the Network_id, stores it in the memory 18 in order, and reads the remote_control_key_id And the service list stored in the memory 18 is updated so that the service can be received by the remote control signal of the specified key number.

  By executing the above processing from the 13th channel to the 62nd channel, the memory 18 stores the Network_id corresponding to the received service and the service list.

  Next, CPU14 reads Network_id memorize | stored in the memory 18, takes the majority vote, and specifies a residence area based on it. In the case of this example, since all channels confirmed to have broadcast signals are in the Kanto wide area, the residential area is specified as the Kanto wide area, and the service list is applied as it is without any change.

  That is, in the service list, a one-touch tuning key number and a list of services corresponding thereto are constructed. The table can be read from the memory 18 and output as a video signal via the graphics processing unit 23.

  As a specific service list, for example, in the Kanto wide area, channel 21 is assigned to Fuji Television, remote_control_key_id is 8, and by operating 8 of the numeric key 16a of the remote controller 16, channel 21 is changed. A service list is generated for receipt.

  Similarly, channel 22 is assigned the numeric key 6 by TBS, channel 23 is assigned 12 by TV TOKYO, channel 24 is assigned 10 by TV Asahi, channel 25 is assigned 4 by NTV, 26 The channel is NHK education and is assigned 3 and the 27 channel is NHK general and is assigned 1.

  Thereby, the user can view the digital broadcast program by a channel switching operation similar to the state in which the analog broadcast program is viewed with respect to the television program similar to the terrestrial analog broadcast.

  The above processing will be further described with reference to the flowchart of FIG. In FIG. 3, the channel scanning is started in step S301, and the channel scan by the tuner 13 is started in step S302. In step S303, the receiving frequency of the tuner is set to select a predetermined channel, for example, 13 channels. Next, in step S304, it is determined whether or not the tuner front end is locked. That is, it is determined whether reception synchronization based on the OFDM frame synchronization signal has been established.

  If it is confirmed in step S304 that the front end is locked, the process proceeds to step S305, where it is determined whether the C / N of the received signal is a sufficient value, and if the C / N is a sufficient value. It is confirmed that there is a broadcast signal that can withstand viewing on the channel. That is, reception confirmation is performed.

  Next, the process proceeds to step S307, where it is determined whether or not the final frequency (for example, 62 channels) has been reached. If not, the reception frequency is increased in step S308 and the process returns to step S303. In step S303, the reception frequency of the tuner 13 is set to select the next 14 channels.

  If it is determined in step S304 that the front end is not locked, it is determined that broadcasting is not being performed on the channel, and steps 305 and S306 are skipped and the process proceeds to step S307. If it is determined in step S304 that the front end is locked, but if it is determined in step S305 that the C / N is not sufficient, it is determined that it is not appropriate to determine that channel as a reception channel. Step S306 is skipped.

  When the above processing is repeated for each channel and the final frequency (62 channels) is reached, in step S309, the residential area is determined by the majority of Network_id extracted from all received broadcast signals, A service list based on the service list is presented in step S310, the duplicate key of the remote controller is changed in step S311, and the process ends in step S3112.

  Note that the reception confirmation in step S306 shown in FIG. 3 more specifically executes the same processing as the flowchart shown in FIG.

  According to the embodiment described above, the setting of the residential area is not performed by the user, but the residential area is specified by the majority of the area identification obtained from the Network_id for each broadcasting station multiplexed and transmitted in the digital broadcast. Since the assignment of the numeric keys of the remote controller can be made in accordance with the broadcasting entity, the operation of changing the duplicate keys can be reduced.

  In the above description, the area identification is obtained from the Network_id, and the residence area is specified by the majority vote. However, the present invention is not necessarily limited thereto, and additional information that can specify another residence area is applied. For example, you may make it identify a residence area using Transport_id for every broadcasting station, for example.

  Furthermore, the process of determining the residence area is not limited to the majority of the area identification, but prioritizes the determination of the area identification based on the identification of the area operator, or prioritizes the determination of the area identification based on the reception C / N. It may be. In addition, the present invention can be implemented in various ways without changing the gist thereof.

The circuit block diagram which shows one Embodiment of the terrestrial television broadcast receiver which concerns on this invention. The block diagram of the remote controller applied to the apparatus shown in FIG. The flowchart for demonstrating operation | movement of the apparatus shown in FIG. The figure which shows the structure of the service identification information transmitted by terrestrial digital broadcasting. The figure which shows the principal part of the information shown in FIG. 4 in detail. The figure which shows the principal part of the information shown in FIG. 4 in detail. The figure which shows the principal part of the information shown in FIG. 4 in detail. The figure which shows the principal part of the information shown in FIG. 4 in detail. The figure which shows the principal part of the information shown in FIG. 4 in detail. The figure which shows the principal part of the information shown in FIG. 4 in detail. The flowchart for demonstrating the process which acquires the information shown in FIG. The flowchart for demonstrating the detail of the process of the principal part of the flowchart of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terrestrial digital broadcast receiver 11 ... UHF antenna 12 ... Antenna input terminal 13 ... Tuner 14 ... CPU
DESCRIPTION OF SYMBOLS 15 ... Operation input part 16 ... Remote controller 17 ... Infrared light-receiving part 18 ... Memory 19 ... ISDB-T decoder 20 ... Descrambler 21 ... TS separation part 22 ... Video decoder 23 ... Graphics processing part

Claims (8)

Receiving means for receiving broadcasts of a plurality of broadcasting stations by a tuner for receiving terrestrial digital broadcasting;
Information acquisition means for acquiring region identification information from the received broadcast signal;
Based on the area identification information acquired by the information acquisition means, a calculation means for calculating a residential area,
A terrestrial digital broadcast receiver characterized by comprising: The terrestrial digital broadcast receiver according to claim 1, wherein the area identification information is obtained from network identification information for each broadcasting station. The terrestrial digital broadcast receiver according to claim 1, wherein the area identification information is obtained from transport identification information for each broadcasting station. The receiving means includes channel selection means for sequentially switching and selecting the reception channels of the tuner, the information acquisition means acquires area identification information from a broadcast signal received by the tuner, and the calculation means includes the calculation means The terrestrial digital broadcast receiver according to any one of claims 1 to 3, wherein a residential area is calculated based on a majority vote of the acquired area identification information. Further, based on the calculated residential area, an area determination means for determining whether the received broadcast signal is within or outside the area,
Remote controller setting means for assigning numeric keys of the remote controller based on the determination result;
The terrestrial digital broadcast receiver according to any one of claims 1 to 4, further comprising: Receiving broadcasts of a plurality of broadcast stations by a tuner that receives terrestrial digital broadcasts;
Obtaining region identification information from the received broadcast signal;
A step of identifying a residential area based on the area identification information acquired by the information acquisition means;
A terrestrial digital broadcast receiving method comprising: Sequentially switching the receiving channel of the tuner receiving terrestrial digital broadcasting;
Determining whether or not a broadcast signal suitable for viewing is received on the switched reception channel;
Obtaining region identification information from each of the broadcast signals determined to be suitable for viewing;
Identifying a residential area by a majority vote of the acquired area identification information;
A terrestrial digital broadcast receiving method comprising: Further, based on the specified residential area, determining whether the received broadcast signal is within or outside the area;
Assigning numeric keys of the remote controller based on the judgment result;
The terrestrial digital broadcast receiving method according to claim 6, wherein the terrestrial digital broadcast receiving method is provided.

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