JP2007235434A - Terrestrial digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a processing time required for selecting a channel for consecutive viewing when a received position is changed while suppressing the cost of the receiver. <P>SOLUTION: The BER (bit error rate) of a radio wave selected at present does not satisfy the criterion, a control section 8 reads a table wherein an area corresponding to an area identification number included in the selected radio wave and physical channels of affiliate stations of the selected broadcast station in this area are managed among channel tables stored in a storage section 7 and applies station selection control to any physical channel in the read table. When the BER of the selected radio wave satisfies the criterion, a user can consecutively view a broadcast program of the affiliate station of the broadcast station having been selected first. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a terrestrial digital broadcast receiver for receiving terrestrial digital broadcast radio waves.

  Conventionally, digital broadcast receivers that receive terrestrial digital broadcast radio waves have been operated. This apparatus receives broadcast radio waves in which video information, audio information, data broadcast information, and the like are multiplexed, and reproduces video information, audio information, and data broadcast information contained in the broadcast radio waves.

  In addition, the terrestrial digital broadcast receiving apparatus performs an assignment process for setting a channel selection target frequency when a channel selection button provided in, for example, a remote controller is pressed. The broadcast radio wave from each broadcast station includes information on the transmission frequency and assigned number of the broadcast radio wave.

  As the allocation process, the terrestrial digital broadcast receiving apparatus selects each frequency in the entire UHF band, extracts information on the transmission frequency and allocation number of the radio wave included in the radio waves that can be broadcasted and viewed, and extracts these information. Correlate and store in the internal storage device.

  Thereafter, the terrestrial digital broadcast receiving apparatus extracts information on the transmission frequency associated with the assignment number assigned to the channel selection button pressed by the user from the storage device described above, and selects a radio wave of this frequency.

  Since the terrestrial digital broadcast receiver is an in-vehicle device and the vehicle moves, the reception position changes, so the frequency of receivable radio waves also changes. In this case, the above-described allocation process is performed again so that the user can continue watching the broadcast.

It takes a lot of time for the terrestrial digital broadcast receiving apparatus to select the entire UHF band for allocation processing. In order to shorten this time, there is an apparatus as disclosed in Patent Document 1, for example. This device divides a table that associates information on transmission frequencies of broadcasting stations corresponding to each region into regions and stores it in a storage device, and detects the current position of the vehicle using GPS (Global Positioning System) To do. This apparatus selects a radio wave of any transmission frequency indicated by a table corresponding to the area to which the detected current position belongs.
JP 2005-86367 A

  If the apparatus described above is used, the processing time for the allocation process can be shortened. However, since the GPS is used to detect the current position of the vehicle, it is necessary to cooperate with the car navigation apparatus and the cost of the equipment is increased. Get higher.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a terrestrial digital broadcast receiving apparatus that can reduce the processing time required for channel selection for continuous viewing when the reception position changes while suppressing the cost of equipment. Is to provide.

  That is, the terrestrial digital broadcast receiving apparatus according to the present invention receives and selects a broadcast radio wave including information on a transmission source area, detects a reception state of the received radio wave, and detects the reception state of the received radio wave in the same area in a previously divided area. Stores local broadcast station information including each transmission frequency of affiliated broadcast stations for each divided area, obtains information on the transmission source area included in the radio waves selected for reception, and a standard in which the detected reception state is predetermined Is not selected, a radio wave having a transmission frequency satisfying the criteria of the detected reception state among the transmission frequencies in the regional broadcast station information corresponding to the area indicated by the acquired information is selected.

  In the terrestrial digital broadcast receiving apparatus according to the present invention, it is possible to reduce the processing time required for channel selection for continuous viewing when the reception position changes while suppressing the cost of the equipment.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a block diagram showing an example of the configuration of a terrestrial digital broadcast receiving apparatus according to the first embodiment of the present invention.
A terrestrial digital broadcast receiver 1 shown in FIG. 1 is an in-vehicle receiver compatible with terrestrial digital broadcast, and includes a tuner unit 3, an OFDM (Orthogonal Frequency Division Multiplex) demodulator 4, and demultiplexing. Unit 5, decoding unit 6, storage unit 7, control unit 8, and input / output interface 9, which are connected to each other via a bus line 10.

  The tuner unit 3 receives and selects a terrestrial digital broadcast radio wave via the antenna 2. The tuner unit 3 detects the bit error rate (BER) of the selected radio wave and outputs a signal indicating this numerical value to the control unit 8. The OFDM demodulator 4 demodulates the signal modulated by the OFDM method into a TS (Transport Stream) of the original digital signal after error correction.

  The demultiplexing unit 5 separates the demodulated TS into audio data, video data, and data broadcasting data for the selected channel. The demultiplexing unit 5 outputs the separated data broadcasting data to the control unit 8. The decoding unit 6 decodes the separated audio data and outputs it to the speaker 11. The decoding unit 6 decodes the separated video data and outputs it to the display unit 12.

  In addition to the control program, the storage unit 7 stores various tables to be described later. The control unit 8 controls the operation of the entire apparatus. Further, the control unit 8 decodes the separated data broadcasting data and outputs it to the display unit 12 via the decoding unit 6 when necessary. The input / output interface 9 receives an infrared signal from the remote controller 13.

FIG. 2 is a diagram showing an example of the external appearance of the remote controller 13 for operating the terrestrial digital broadcast receiving apparatus 1 according to the first embodiment of the present invention.
The remote controller 13 includes a transmitter 31, a power key 32, a cursor key 33, a “d” key (d button) 34, a channel selection key 35, a numeric key 36, a menu key 37, a volume adjustment key 38 and a color key 39.

  The transmitter 31 performs infrared communication with the input / output interface 9 shown in FIG. The power key 32 is a key for turning on / off the power of the apparatus. The cursor key 33 is a stick-like key. The cursor key 33 is input to move the cursor in four directions by tilting up / down (front / back) and left / right, and “enter” input by pressing the stick itself.

  The “d” key 34 is a key for setting ON / OFF of the display of information for data broadcasting. The channel selection key 35 is an up / down key for channel selection. The numeric keys 36 are keys arranged in a matrix. The numeric key 36 also functions as a button for inputting a channel selection allocation number. The menu key 37 is a key for displaying a menu screen. The volume adjustment key 38 is an up / down key for adjusting the volume. The color keys 39 are four keys colored by red, yellow, green, and blue.

  The data broadcasting data described above includes PSI / SI (Program Specific Information / Service Information). PSI / SI includes physical channel information and broadcast station name information. The physical channel is identification information unique to a predetermined broadcast frequency band of transmission radio waves. Here, the physical channel indicates identification information of any of 50 frequency bands from the 13th channel to the 62nd channel of the UHF (Ultra High Frequency) band.

  The PSI / SI includes a NIT (Network Information Table). The NIT describes an area identification number, a remote control key ID (remote control key id), a network ID (network id), and the like. The region identification number is region identification information of the broadcasting station that is the transmission source of PSI / SI.

  The remote control key ID is information corresponding to the channel assignment number input by operating the channel selection key 35 or the numeric key 36 of the remote controller 13. The network ID is information indicating the type of the broadcasting station that is the transmission source. The network ID included in the radio wave from the master station of the broadcasting station is the same as the network ID included in the radio wave from the relay station of the broadcasting station of the same company as the broadcaster operator.

FIG. 3 is a table showing the correspondence relationship between the area identification numbers and the area names extracted by the terrestrial digital broadcast receiving apparatus 1 according to the first embodiment of the present invention.
As shown in FIG. 3, the region identification number is a number corresponding to each region such as a prefecture and a predetermined wide area.

FIG. 4 is a diagram showing an example (part 1) of the channel table stored in the storage unit 7 of the terrestrial digital broadcast receiving device 1 according to the first embodiment of the present invention in a table format.
The table shown in FIG. 4 is a table corresponding to the area identification number “3” and the network ID of the Fuji TV series shown in FIG. 3, and the Chukyo wide area which is the area name corresponding to the area identification number “3” and its Information on the names of neighboring areas, the names of the broadcasting stations of the Fuji TV series in these areas, the transmitting station of the broadcasting station, the remote control key ID, and the physical channel are associated and managed.

FIG. 5 is a diagram showing in tabular form an example (part 2) of the channel table stored in the storage unit 7 of the terrestrial digital broadcast receiving apparatus 1 according to the first embodiment of the present invention.
The table shown in FIG. 5 is a table corresponding to the area identification number “35” and the Fuji TV series network ID shown in FIG. 3, Shizuoka, which is the area name corresponding to the area identification number “35”, and the vicinity thereof. Are managed in association with each other's area names, names of broadcasting stations of Fuji TV series in these areas, transmitting station, remote control key ID, and physical channel information.

  In addition to the channel tables shown in FIGS. 4 and 5, the storage unit 7 stores a channel table corresponding to each area identification number shown in FIG. 3 for each type of broadcasting station series.

Next, the operation of the terrestrial digital broadcast receiver 1 having the configuration shown in FIG. 1 will be described.
First, after the terrestrial digital broadcast receiver 1 is turned on, the controller 8 performs an initial scan process. In this scanning process, the tuner unit 3 sequentially receives and selects radio waves in all frequency bands from the 13th channel to the 62nd channel of the UHF band and tries to recognize the PSI / SI. This is a process of analyzing and extracting various types of information contained therein.

  Specifically, first, the control unit 8 instructs the tuner unit 3 to select the channel 13 of the UHF band. Then, the tuner unit 3 selects the 13th channel radio wave. When the tuner unit 3 selects a channel, the control unit 8 tries to extract physical channel information and remote control key ID included in the PSI / SI from the decoding unit 6.

If the control unit 8 cannot extract various information in the PSI / SI even after a certain period of time has elapsed after channel selection due to poor reception of radio waves, etc., the control unit 8 is next to the number of the physical channel currently selected. Instructs the selection of the physical channel of the number. Thereafter, the same processing is repeated up to the 62nd channel of the UHF band.
When the physical channel information and the remote control key ID can be extracted from the selected radio wave, the control unit 8 reflects these information in the allocation table in the storage unit 7.

FIG. 6 is a diagram showing a configuration example of an allocation table stored in the storage unit of the terrestrial digital broadcast receiving apparatus 1 according to the first embodiment of the present invention in a table format.
As shown in FIG. 6, in the allocation table, physical channel information and remote control key ID are associated and managed.

  When the user inputs a tuning assignment number by operating the numeric key 36 or the tuning key 35 of the remote controller 13, the control unit 8 has information on the physical channel associated with the same remote control key ID as this tuning assignment number. Is selected from the allocation table, and the tuner unit 3 is instructed to select the physical channel.

FIG. 7 is a diagram showing an example of a moving route of a vehicle on which the terrestrial digital broadcast receiving device 1 according to the first embodiment of the present invention is mounted.
Hereinafter, as shown in FIG. 7, a vehicle equipped with the terrestrial digital broadcasting receiver 1 moves east from A point in Aichi Prefecture to B point in the same prefecture, C point in Shizuoka Prefecture, and D point in the same prefecture. The processing of the terrestrial digital broadcast receiving apparatus 1 in this case will be described. The triangle mark shown in FIG. 7 shows the position of the transmitting station of a typical broadcasting station in each region, and the curve around this triangle mark shows the rough transmission range of the radio wave from the transmitting station.

8 and 9 are flowcharts showing an example of the processing operation of the terrestrial digital broadcast receiving apparatus 1 according to the first embodiment of the present invention.
Here, it is assumed that the currently selected channel is the broadcasting channel “Tokai Television” among the physical channels shown in FIG. 4 and the transmitting station is the 21st channel in Nagoya.

  First, the control unit 8 detects the value of BER indicated by the signal from the tuner unit 3, and determines whether or not this value exceeds a predetermined threshold value stored in the storage unit 7 (step S1, S1). S2). The control unit 8 repeats this process at predetermined time intervals.

  For example, as shown in FIG. 7, when the vehicle is located at point B, “Tokai TV” whose transmitting station is Nagoya cannot be received, and the control unit 8 has a BER indicated by a signal from the tuner unit 3. It is determined that a predetermined threshold value stored in the storage unit 7 has been exceeded (YES in step S2).

  Then, the control unit 8 recognizes the network ID and the area identification number included in the currently selected radio wave, and reads the corresponding channel table from the storage unit 7 (step S3). As described above, when the transmitting station is currently selecting “Tokai TV” in Nagoya, the area identification number included in the selected radio wave is “3”, and the network ID is a network ID indicating “Tokai TV”. is there. Since this network ID is the network ID of a Fuji TV affiliated broadcasting station, the table shown in FIG. 4 is to be read.

  The control unit 8 outputs to the tuner unit 3 a control signal indicating a channel selection instruction for any physical channel other than the currently selected physical channel on the channel table read out in step S3.

  If the channel table read out in the process of step S3 is the table shown in FIG. 4, the 15th channel, which is the physical channel of “Tokai Television” whose transmitting station is Toyohashi, is the channel selection target. .

  The tuner unit 3 performs channel selection in response to the input of a signal from the control unit 8 (step S4). Then, the control unit 8 determines whether or not the BER indicated by the signal from the tuner unit 3 is equal to or less than a predetermined threshold stored in the storage unit 7 (step S5).

  As described above, when the vehicle is located at the point B, the control unit 8 determines that the BER indicated by the signal from the tuner unit 3 is equal to or less than a predetermined threshold value stored in the storage unit 7 (step S5). YES)

  Then, the control unit 8 acquires information on the broadcast station name included in the newly selected radio wave, and this broadcast station name is the same as one of the broadcast station names on the channel table read out in the process of step S3. It is determined whether or not there is (step S6).

  As described above, when the 15th channel, which is the physical channel of “Tokai Television” in Nagoya, is newly selected, this broadcast station name is read in the process of step S3 in FIG. It exists on the indicated channel table (YES in step S6). In this case, since the relay station or affiliated station of the broadcasting station that was initially selected is newly selected, the control unit 8 uses the information on the physical channel included in the newly selected radio wave and the remote controller. The key ID is reflected in the assignment table shown in FIG. Therefore, the user can continuously watch the broadcast from the same affiliated station.

  On the other hand, when the control unit 8 determines that the broadcast station name included in the newly selected radio wave is different from any of the broadcast station names on the channel table read out in step S3 (NO in step S6). Indicates that a radio wave from another broadcasting station has been selected, and indicates a channel selection instruction for one of the physical channels excluding the selected physical channel on the channel table read out in step S3. A control signal is output to the tuner unit 3 (steps S6 → S4).

  If it is determined “NO” in the process of step S5, the control unit 8 determines whether or not all physical channels on the channel table read in the process of step S3 have been selected (step S7). ).

  When the control unit 8 determines “NO” in the process of step S7, the control unit 8 indicates a channel selection instruction for any physical channel except the selected physical channel on the channel table read in the process of step S3. A control signal is output to the tuner unit 3 (steps S7 → S4).

  When the vehicle has moved to the point C as described above, the control unit 8 determines “YES” in the process of step S7. Point C is a point near Hamamatsu in Shizuoka Prefecture, but the point where the digital terrestrial broadcasting receiver 1 cannot normally receive the radio waves of “Shizuoka TV” on the channel table shown in FIG. 4 due to the influence of surrounding obstacles, etc. Suppose that

  In this case, it means that radio waves from all broadcast stations on the channel table read out in the process of step S3 cannot be received normally. Then, the terrestrial digital broadcast receiving apparatus 1 starts an estimation process of the current region of the vehicle.

  Specifically, the control unit 8 outputs a control signal indicating a channel selection instruction for the center frequency of the 13th channel in the UHF band to the tuner unit 3 (step S8). The tuner unit 3 selects the thirteenth channel in response to the input of the control signal from the control unit 8 (step S9).

Then, the control unit 8 determines whether or not the BER indicated by the signal from the tuner unit 3 is equal to or less than a predetermined threshold stored in the storage unit 7 (step S10).
When the control unit 8 determines “NO” in the process of step S10, the control unit 8 considers that the reception is poor, and the channel selection target frequency indicated by the control signal output to the tuner unit 3 is the center of the 62nd channel in the UHF band. It is determined whether or not the frequency is reached (step S11).

  If it is determined as “YES” in the process of step S11, the control unit 8 considers that radio waves of all physical channels in the UHF band cannot be received, and displays a message indicating that reception is not possible on the display unit 12 (step S12). On the other hand, when the control unit 8 determines “NO” in the process of step S11, the tuner unit 3 sends a control signal indicating a channel selection instruction for the center frequency of the physical channel next to the currently selected physical channel number. (Step S11 → S13). Thereafter, the process proceeds to step S9 and subsequent steps.

  In addition, when the BER indicated by the signal from the tuner unit 3 is equal to or less than a predetermined threshold stored in the storage unit 7 (YES in step S10), the control unit 8 considers that reception is good, and newly The broadcast station information included in the radio wave selected in step S3 is acquired, and it is determined whether or not this broadcast station is the same as any one of the broadcast stations on the channel table read out in step S3 (step S3). S14).

  When the control unit 8 determines “YES” in the process of step S14, the relay station or affiliated station of the broadcasting station that was initially selected is newly selected, so the control unit 8 newly The physical channel information and remote control key ID included in the selected radio wave are reflected in the allocation table shown in FIG. Therefore, the user can continuously watch the broadcast from the same affiliated station.

  On the other hand, if the control unit 8 determines “NO” in the process of step S14, the control unit 8 acquires an area identification number included in the received radio wave (step S15). The control unit 8 determines whether or not a channel table corresponding to the acquired area identification number is stored in the storage unit 7 (steps S16 and S17).

  If the control unit 8 determines “NO” in the process of step S17, it cannot receive radio waves from the broadcast station relay station or affiliated station that was originally viewed, or the channel that was originally viewed is limited to the area. It is regarded as a broadcasting station, and a message indicating that reception is impossible is displayed on the display unit 12 (step S18).

  On the other hand, if it is determined “YES” in the process of step S17, the control unit 8 reads this channel table, and sends a control signal indicating a channel selection instruction of any physical channel on the read channel table to the tuner unit. 3 is output.

  For example, when the transmitting station of the broadcasting station of the physical channel that is well received among the physical channels selected in step S9 is the transmitting station of Shizuoka of NHK General, the area included in the selected radio wave The identification number is “35” indicating Shizuoka. In this case, the control unit 8 uses the same network ID as the network ID corresponding to the channel table read out in step S3 and the channel table corresponding to the area identification number acquired in step S15 (see FIG. 5). Is read.

  The tuner unit 3 performs channel selection in response to the input of a signal from the control unit 8 (step S19). And the control part 8 discriminate | determines whether BER shown by the signal from the tuner part 3 is below the predetermined threshold memorize | stored in the memory | storage part 7 (step S20).

  The vehicle has moved to the aforementioned point D, and the physical channel selected in the process of step S19 is the 17th channel of “Shizuoka Television” whose transmitting station on the channel table shown in FIG. 5 is Shizuoka. In this case, the control unit 8 determines “YES” in the process of step S20.

  Then, the control unit 8 acquires broadcast station information included in the radio wave selected in the process of step S19, and is this broadcast station the same as any broadcast station on the channel table that is newly read out? It is determined whether or not (step S21).

  If the control unit 8 determines “YES” in the process of step S21, the affiliated station of the broadcast station that was initially selected is newly selected, so the control unit 8 is newly selected. The physical channel information and remote control key ID included in the received radio wave are reflected in the assignment table shown in FIG. Therefore, the user can continuously watch the broadcast from the same affiliated station.

  If it is determined “NO” in the process of step S20, the control unit 8 determines whether all physical channels on the newly read channel table have been selected (step S22).

  When the control unit 8 determines “NO” in the process of step S22, the control signal indicates a channel selection instruction for any physical channel excluding the selected physical channel on the newly read channel table. Is output to the tuner unit 3 (steps S22 → S19).

  On the other hand, if it is determined “YES” in the process of step S22, the control unit 8 regards that the radio wave from the affiliated station of the broadcast station that the user has watched cannot be received, and displays a message indicating that reception is not possible. 12 is displayed (step S23).

  As described above, in the terrestrial digital broadcast receiving apparatus according to the first embodiment of the present invention, when the vehicle on which the apparatus is mounted moves and the broadcast that was being viewed cannot be received, the UHF band terrestrial broadcasting can be received. Instead of selecting all the physical channels of the digital wave broadcasting, the current region of the vehicle is estimated based on the region identification number included in any receivable radio wave of the terrestrial digital broadcasting in the UHF band. By selecting each physical channel on the channel table corresponding to the relay station or affiliate station of the broadcast station that the user was viewing in the estimated area, the relay station or affiliate station of the broadcast station that the user was viewing was newly selected. Therefore, the time required for the channel selection process for the user to continue viewing the program can be greatly shortened.

  This terrestrial digital broadcast receiving apparatus 1 sequentially selects each physical channel of the UHF band for estimating the current position of the vehicle, and acquires an area identification number included in the first receivable radio wave. Although the area corresponding to this area identification number does not necessarily coincide completely with the current area of the vehicle, it is clear that it is either the current area of the vehicle or a neighboring area.

For example, even if the area identification number included in the radio waves selected in Aichi Prefecture is a number indicating Shizuoka, the channel table shown in FIG. 5 corresponding to Shizuoka is the channel of Aichi Prefecture that is a neighboring prefecture of Shizuoka Prefecture. Because it is configured to include information, even if the actual vehicle location is Aichi Prefecture or Shizuoka Prefecture, the physical channel that can be received from the relay station or affiliated station of the broadcasting station that the user was watching from the beginning Is likely to be included in the table.
Therefore, since this terrestrial digital broadcast receiving apparatus 1 can recognize the position of the vehicle without using GPS, it is possible to reduce the cost of the equipment.

  In addition, the control unit 8 includes information on the combination of the area identification number, the broadcast station name, the remote control key ID, and the physical channel included in the radio wave that was received well when the initial scan process described above was performed. If the broadcast station series corresponding to the network ID and the channel table corresponding to the area identification number are not included in the channel table, the combination information described above may be reflected on this table.

  The terrestrial digital broadcast receiving apparatus 1 detects the value of the BER of the currently selected radio wave at a predetermined time interval as the processing of steps S1 and S2, and the value exceeds a threshold value. However, the present invention is not limited to this. For example, the broadcast station currently selected on the remote control 13 on the remote controller 13 by the user who has determined that the reception state has deteriorated due to the image appearance on the display unit 12 is not limited to this. The radio wave BER value may be detected in accordance with the pressing of the numeric key 36 or other key corresponding to the remote control key ID concerned, and the processing after step S3 may be performed when this value exceeds a threshold value.

  When the display unit 12 is a touch panel, the control unit 8 displays icons corresponding to numbers from “1” to “12” on the display unit 12, for example. The user may be allowed to touch instead of the numeric key 36.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The configuration of the terrestrial digital broadcast receiving apparatus 1 according to each of the following embodiments is basically the same as that shown in FIG.

FIG. 10 and FIG. 11 are flowcharts showing an example of the processing operation of the terrestrial digital broadcast receiver 1 according to the second embodiment of the present invention.
This terrestrial digital broadcast receiving apparatus 1 performs the above-described steps S1 to S20. If the control unit 8 determines “YES” in the process of step S20, the control unit 8 acquires broadcast station information included in the newly selected radio wave, and this broadcast station is newly read on the channel table. It is discriminate | determined whether it is the same as any one of these broadcasting stations (step S21).

  If it is determined “YES” in the process of step S21, the control unit 8 determines whether or not all physical channels on the newly read channel table have been selected (step S31).

  If the control unit 8 determines “NO” in the process of step S31, the control unit 8 detects the BER indicated by the signal from the tuner unit 3, and associates the value of this BER with the information of the currently selected physical channel. Each physical channel is temporarily stored in the storage unit 7 (step S32).

  Then, as described above, the control unit 8 outputs to the tuner unit 3 a control signal indicating a channel selection instruction for one of the physical channels excluding the channel already selected on the channel table that has been newly read (step S3). S32 → S19).

  On the other hand, if the control unit 8 determines “YES” in the process of step S31, among the physical channels stored in the storage unit 7 by the process of step S32, the BER value associated therewith is set to another physical channel. The highest physical channel is identified in comparison with the BER value associated with this information, and a control signal indicating a channel selection instruction for this physical channel is output to the tuner unit 3. The tuner unit 3 performs channel selection in response to the input of a signal from the control unit 8 (step S33).

  Therefore, in the terrestrial digital broadcast receiving apparatus according to the second embodiment of the present invention, the user can continuously watch the broadcast with a better reception state than the terrestrial digital broadcast receiving apparatus according to the first embodiment. Can be realized.

(Third embodiment)
Next, a third embodiment of the present invention will be described. FIG. 12 and FIG. 13 are flowcharts showing an example of the processing operation of the terrestrial digital broadcast receiver 1 according to the second embodiment of the present invention.

  This terrestrial digital broadcast receiving apparatus 1 performs the above-described steps S1 to S17. If the control unit 8 determines “YES” in step S17, the total number of unselected physical channels in the channel table read out in step S3 and the 50 types of physical channels in the UHF band. Whether or not the total number of unselected physical channels in the channel table is less than or equal to the number of unselected physical channels among the 50 types of physical channels in the UHF band. Is discriminated (step S41).

  When the control unit 8 determines “YES” in the process of step S41, the control unit 8 outputs a control signal indicating a channel selection instruction for one of the physical channels on the channel table to the tuner unit 3, and after the above-described step S19 and subsequent steps. Transition to processing.

  On the other hand, when the control unit 8 determines “NO” in the process of step S41, that is, the total number of unselected physical channels in the channel table is the number of unselected physical channels among the 50 types of physical channels in the UHF band. Is exceeded, the control signal indicating the channel selection instruction of the physical channel with the smallest number among the unselected physical channels in the 50 types of physical channels in the UHF band is output to the tuner unit 3. The tuner unit 3 performs channel selection in response to the input of a signal from the control unit 8 (step S42).

  Then, the control unit 8 detects the BER indicated by the signal from the tuner unit 3 (step S43). The control unit 8 determines whether or not the physical channel selected in the process of step S42 is the 62nd channel of the UHF band (step S44).

  When the control unit 8 determines “NO” in the process of step S44, the control unit 8 outputs a control signal indicating a channel selection instruction for the physical channel next to the number of the currently selected physical channel to the tuner unit 3. (Step S45), the process returns to Step S42.

  On the other hand, if it is determined “YES” in the process of step S44, the control unit 8 acquires broadcast station information included in the newly selected radio wave, and the channel table from which this broadcast station is newly read out. It is determined whether or not it is the same as any of the above broadcasting stations. If it is the same, it is determined whether or not the BER detected in the process of step S43 is equal to or less than a predetermined threshold stored in the storage unit 7. It discriminate | determines (step S46).

  If the control unit 8 determines “NO” in the process of step S46, the control unit 8 regards that the radio wave from the relay station or affiliated station of the broadcast station that was initially selected cannot be received, and displays a message indicating that reception is not possible. 12 is displayed (step S47).

  If the control unit 8 determines “YES” in step S46, the affiliated station of the broadcast station that was initially selected is newly selected, so the control unit 8 newly selects the channel. The physical channel information and remote control key ID included in the received radio wave are reflected in the assignment table shown in FIG. Therefore, the user can continuously watch the broadcast from the same affiliated station.

  The terrestrial digital broadcast receiving apparatus 1 according to each embodiment described above automatically selects a relay station or affiliate station of a broadcast station that has been selected in order to realize continuous viewing of a broadcast by a user. is there. The broadcast program of the master station of the originally selected broadcast station and the broadcast program of the newly selected affiliated station are not necessarily the same, but the terrestrial digital broadcast receiver 1 is included in the selected radio wave. Whether or not the broadcast program of the master station of the selected broadcast station and the broadcast program of the affiliated station are the same by reading out information about the program such as the program name, broadcast date and time, and description of the contents in the EIT (Event Information Table) Can be determined. Therefore, the terrestrial digital broadcast receiving apparatus may perform control to output video and audio only when the program of the parent station of the initially selected broadcast station and the program of the newly selected affiliated station are the same. good.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

1 is a block diagram showing a configuration example of a terrestrial digital broadcast receiving device according to a first embodiment of the present invention. The figure which shows an example of the external appearance of the remote control for operating the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention. The figure which shows the correspondence of the area identification number and area name which the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention extracts in a table format. The figure which shows an example (the 1) of a channel table memorize | stored in the memory | storage part 7 of the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention in a table format. The figure which shows an example (the 2) of a channel table memorize | stored in the memory | storage part 7 of the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention in a table format. The figure which shows the structural example of the allocation table memorize | stored in the memory | storage part of the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention in a table format. The figure which shows an example of the movement path | route of the vehicle carrying the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention. The flowchart which shows an example (the 1) of processing operation of the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention. The flowchart which shows an example (the 2) of processing operation of the terrestrial digital broadcast receiver according to the 1st Embodiment of this invention. The flowchart which shows an example (the 1) of processing operation of the terrestrial digital broadcast receiver according to the 2nd Embodiment of this invention. The flowchart which shows an example (the 2) of processing operation of the terrestrial digital broadcast receiver according to the 2nd Embodiment of this invention. The flowchart which shows an example (the 1) of processing operation of the terrestrial digital broadcast receiver according to the 3rd Embodiment of this invention. The flowchart which shows an example (the 2) of processing operation of the terrestrial digital broadcast receiver according to the 3rd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Terrestrial digital broadcast receiver, 2 ... Antenna, 3 ... Tuner part, 4 ... OFDM demodulation part, 5 ... Demultiplexing part, 6 ... Decoding part, 7 ... Memory | storage part, 8 ... Control part, 9 ... Input-output interface DESCRIPTION OF SYMBOLS 10 ... Bus line, 11 ... Speaker, 12 ... Display part, 13 ... Remote control, 31 ... Transmission part, 32 ... Power key, 33 ... Cursor key, 34 ... "d" key (d button), 35 ... Tuning key , 36 ... numeric keys, 37 ... menu keys, 38 ... volume control keys, 39 ... color keys.

Claims (5)

Receiving channel selection means for receiving and selecting broadcast radio waves including information on the transmission source area;
Detection means for detecting the reception state of the radio wave received and selected by the reception channel selection means;
Storage means for storing regional broadcast station information including each transmission frequency of the same series broadcast station in a pre-divided area for each of the divided areas;
Obtaining means for obtaining information of the transmission source area included in the radio wave received and selected by the reception tuning means;
When the reception state detected by the detection means does not satisfy a predetermined standard, each transmission frequency in the local broadcast station information corresponding to the area indicated by the information stored in the storage means and acquired by the acquisition means A terrestrial digital broadcast receiving apparatus comprising: a re-tuning unit that tunes a radio wave having a transmission frequency whose reception state detected by the detection unit satisfies the reference. The reception channel selection means includes:
If the re-selection means cannot select a transmission frequency radio wave that the reception state detected by the detection means satisfies the criteria, further select a radio wave of each transmission frequency in a predetermined frequency band,
When the reception state detected by the detection unit in the selected radio wave satisfies the criterion, the radio station further includes a reacquisition unit that acquires information on the transmission source area included in the selected radio wave,
The re-tuning means is
The reception state detected by the detection means among the radio waves of each transmission frequency in the regional broadcast station information corresponding to the area indicated by the information acquired by the re-acquisition means stored in the storage means is a transmission frequency satisfying the standard. 2. The terrestrial digital broadcast receiving apparatus according to claim 1, further selecting a radio wave. The re-tuning means is
The transmission frequency in the regional broadcasting station information corresponding to the area indicated by the information acquired by the re-acquisition means stored in the storage means is selected according to a predetermined order, and the detection of the selected radio wave is performed. 3. The terrestrial digital broadcast receiving apparatus according to claim 2, wherein the channel selection is terminated when the reception state detected by the means satisfies the criterion. The re-tuning means is
All the transmission frequencies in the regional broadcasting station information corresponding to the area indicated by the information stored in the storage means and acquired by the re-acquisition means are selected, and the detection means detects the radio waves of these selected transmission frequencies. 3. The terrestrial digital broadcast receiving apparatus according to claim 2, wherein a radio wave having a transmission frequency that satisfies the above-mentioned reception condition and has the best reception condition is selected. Receiving channel selection means for receiving and selecting broadcast radio waves including information on the transmission source area;
Detection means for detecting the reception state of the radio wave received and selected by the reception channel selection means;
Storage means for storing regional broadcast station information including each transmission frequency of the same series broadcast station in a pre-divided area for each of the divided areas;
Obtaining means for obtaining information of the transmission source area included in the radio wave received and selected by the reception tuning means;
An input unit that accepts input operations;
The information stored in the storage means and acquired by the acquisition means when the reception state detected by the detection means does not satisfy a predetermined standard when a predetermined input operation is performed on the input unit. And a re-tuning means for selecting a radio wave having a transmission frequency that satisfies the above-mentioned criteria in the reception state detected by the detection means among the transmission frequencies in the corresponding regional broadcasting station information. Wave digital broadcast receiver.

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