JP5398643B2 - Terrestrial digital TV receiver - Google Patents

Description

  The present invention relates to reception of terrestrial digital television broadcasting, and more particularly to a receiver that continues viewing even when the boundary of a broadcasting area is exceeded.

  In terrestrial digital broadcasting, there are cross-net stations having a plurality of series IDs as part of local stations. In order to make it possible to select such cross-net stations as the same affiliated station, in Patent Document 1, broadcast stations that are determined to be receivable at the time of channel search are collectively grouped into a single tuning key. Means to allocate have been proposed.

JP 2006-100533 A

However, in the reception method of Patent Document 1 described above, when moving from the broadcast area of the single affiliated station to the broadcast area of the crossnet station, and when moving from the broadcast area of the crossnet station to the broadcast area of the single affiliated station. In order to view the same affiliated station, the user needs to select the channel. Especially in the in-vehicle broadcast receiver, it is convenient for the driver to operate even if the passenger operates. There was a problem in both safety and safety.
In the receiving method of Patent Document 1, when the broadcast area is moved from a single affiliated station to a crossnet station and then to a single affiliated station, the sequence ID of the broadcast station being viewed is a subsequence of the crossnet station. In this case, there is a problem that it is difficult to continue selecting the same series.

  The present invention has been made in order to solve the above-described problems, and even when the program being viewed is a sub-series of a cross-net station, the digital terrestrial broadcasting that can continue viewing of the same series of broadcast stations An object is to provide a television receiver.

In the terrestrial digital television receiver that receives a digital broadcast wave, the present invention provides a storage unit for storing additional information included in the digital broadcast wave, and the viewing of the digital broadcast wave when the broadcast station being viewed cannot be received. Based on the position information indicating the position, the additional information read from the storage unit is referenced, and the same broadcasting station as the broadcasting station of the single affiliated station being viewed is searched for automatically from the main affiliated station and sub affiliated station of the cross-net station. or channel selection, and a control unit for the station selected automatically by searching the same broadcasting station and the broadcasting station of the main series or sub-series of cross-network stations being viewed from a single sequence stations, control unit, net cross A plurality of sequence IDs included in the additional information of the broadcasting station of the station are not stored in the storage unit, but a sequence ID included in the additional information of the broadcasting station of the most recently selected single affiliated station is stored as the last sequence ID. Stored in the department , Which is constituted so that the stations selected automatically by searching the broadcast station having the last sequence ID same sequence ID and.

According to the present invention, when a broadcasting station being viewed becomes unreceivable, the additional information read from the storage unit is referred to based on the position information indicating the viewing position of the digital broadcast wave, and the single sequence being viewed Search for the same broadcasting station as the broadcasting station of the station from the main series and sub series of the crossnet station, or select the same broadcasting station as the broadcasting station of the main series or sub series of the crossnet station being viewed. A control unit that automatically selects and searches from a single affiliated station . The controller does not store a plurality of sequence IDs included in the additional information of the broadcast station of the cross-net station in the storage unit, but selects the most recently. The sequence ID included in the additional information of the broadcast station of the single affiliated station is stored in the storage unit as the last sequence ID, and a broadcast station having the same sequence ID as the last sequence ID is searched and automatically selected. So that the user can see Even if to have sequence is a sub-series of cross-network stations, the user can continue to watch the broadcast station in the same sequence without regard to the broadcast area of the cross-network stations.

1 is a block diagram showing a configuration of a terrestrial digital television receiver according to Embodiment 1. FIG. 6 is an explanatory diagram illustrating movement between broadcast areas of the terrestrial digital television receiver according to Embodiment 1. FIG. 4 is an explanatory diagram illustrating an example of a broadcasting station and a sequence ID of the terrestrial digital television receiver according to Embodiment 1. FIG. 3 is a flowchart showing the operation of the terrestrial digital television receiver according to the first embodiment. 6 is an explanatory diagram illustrating movement between broadcast areas of the terrestrial digital television receiver according to Embodiment 1. FIG. 4 is an explanatory diagram illustrating an example of a broadcasting station and a sequence ID of the terrestrial digital television receiver according to Embodiment 1. FIG. 6 is a block diagram showing a configuration of a terrestrial digital television receiver according to Embodiment 2. FIG. 10 is a flowchart showing a database creation operation of the terrestrial digital television receiver according to the second embodiment. 6 is an explanatory diagram illustrating an example of a database of a terrestrial digital television receiver according to Embodiment 2. FIG. FIG. 10 is an explanatory diagram illustrating an example of a cross net station program guide of a terrestrial digital television receiver according to a second embodiment. 6 is a flowchart showing the operation of the terrestrial digital television receiver according to the second embodiment.

Embodiment 1 FIG.
1 is a block diagram showing a configuration of a digital terrestrial television receiver according to Embodiment 1 of the present invention.
The terrestrial digital television receiver 10 includes a tuner unit 1, an OFDM (Orthogonal Frequency Division Multiplex) demodulation unit 2, a control unit 3, an operation unit 4, a decoding unit 5, and a storage unit 6.
The tuner unit 1 receives a digital broadcast wave from the antenna 20, converts it into a digital signal, and outputs it. The OFDM demodulator 2 demodulates the digital signal output from the tuner 1 and outputs a TS stream. The control unit 3 separates the TS stream output from the OFDM demodulation unit 2 into video / audio data and additional information, outputs the video / audio data to the decoding unit 5, and extracts only necessary information from the additional information. To be stored in the storage unit 6. Here, it is assumed that at least the series ID is included as additional information. Also, the user operation information (channel selection information) output from the operation unit 4 is analyzed to control the tuner unit 1, the current location information output from the position information acquisition unit 30 is analyzed to grasp the current location, and OFDM demodulation is performed. The reception status information (reception strength) of the unit 2 is monitored. In addition to providing a dedicated position information acquisition unit, the position information acquisition unit 30 may use position information output from the navigation device when a navigation device is provided.

  The operation unit 4 receives user operation information output from the remote controller 40 and outputs it to the control unit 3. The decoding unit 5 decodes the video / audio data output from the control unit 3 and outputs it to the display device 50. The storage unit 6 stores additional information analyzed by the control unit 3. The storage unit 6 stores broadcast station information corresponding to broadcast areas throughout the country in advance.

  FIG. 2 shows a broadcast area in which broadcast stations having a plurality of sequence IDs exist from a broadcast area (hereinafter referred to as a single affiliated station broadcast area) A in which only a broadcast station having only one sequence ID exists in the vehicle P. Hereinafter, the case of moving to B) (referred to as a cross-net station broadcast area) is shown. In addition, as shown in FIG. 3, a single affiliated station broadcast area A includes a broadcast station A0 (sequence ID = 0), a broadcast station A1 (sequence ID = 1), a broadcast station A2 (sequence ID = 2), and a broadcast. Station A3 (sequence ID = 3) exists, and in the cross-net station broadcast area B, broadcast station B0 (sequence ID = 0, 1, 2, main sequence ID = 0) and broadcast station B3 (sequence ID = 3) Indicates that it exists.

The operation of the terrestrial digital television receiver according to the first embodiment will be described with reference to FIG. 2 and FIG.
When the broadcasting station A1 is selected in the single affiliated station broadcasting area A, the control unit 3 includes a sequence ID (for example, “1”) included in the additional information from the TS stream output from the OFDM demodulating unit 2. Is extracted and stored in the storage unit 6. While viewing the broadcast station A1, the control unit 3 monitors the reception state information (reception strength) of the OFDM demodulation unit 2. When the broadcasting station A1 moves from the single affiliated station broadcasting area A to the cross-net station broadcasting area B, the receiving state of the broadcasting station A1 gradually deteriorates. At that time, when the reception state deteriorates beyond the predetermined time, the control unit 3 detects the current location information output from the location information acquisition unit 30 and the broadcasting station corresponding to the nationwide broadcasting area stored in the storage unit 6. A broadcast station having the same series ID as that of the broadcast station A1 is searched from the information. As a result of the search, when a cross-net broadcasting station B0 having a plurality of series IDs (for example, a series ID of 0/1/2 and a main series ID is 0) is extracted, the series ID (= 1) of the broadcasting station A1 is Although it is a sub-series of the broadcasting station B0, the tuner unit 1 is controlled so as to select the broadcasting station B0 by determining that it is the same affiliated station of the broadcasting station A1.

Next, a detailed channel selection operation when moving from the single sequence broadcasting area A shown in FIG. 2 to the cross-net station broadcasting area B will be described with reference to the flowchart of FIG. FIG. 4 is a flowchart showing the operation of the control unit of the terrestrial digital television receiver according to the first embodiment.
When the broadcasting station X (for example, the broadcasting station A1 in FIG. 3) is selected by a user operation in the single affiliated station broadcasting area A through the remote controller 40, the control unit 3 selects the channel selected from the operating unit 4. Broadcast station A1 is selected based on the information (step ST1). Next, a sequence ID that is one of the additional information is acquired from the TS stream output from the OFDM demodulator 2 (step ST2), and it is determined whether the acquired sequence ID is a single sequence ID or a multiple sequence ID. Perform (step ST3).

  In the example of FIG. 2, since it is determined that it is a single sequence ID, the sequence ID (= 1) of the broadcasting station A1 is stored in the storage unit 6 as the last sequence ID (step ST4). Next, while viewing the broadcasting station A1, the reception state information (reception strength) of the OFDM demodulator 2 is monitored (step ST5), and it is determined whether or not the deterioration of the reception state continues for a predetermined time (step ST5). ST6). For example, when the vehicle P moves from the single affiliated station broadcast area A to the cross-net station broadcast area B, the reception state of the broadcast station A1 gradually deteriorates. In step ST6, when the reception state deterioration has not continued for a predetermined time, the process returns to step ST5 and monitoring is continued.

  On the other hand, when it is determined in step ST6 that the reception state deterioration continues for a predetermined time, the current location information output from the position information acquisition unit 30 is acquired (step ST7). Next, the broadcasting station corresponding to the current location information acquired in step ST7 is extracted from the broadcasting station information corresponding to the national broadcasting area stored in the storage unit 6 (step ST8). Further, the last sequence ID (= 1) stored in step ST4 is acquired from the storage unit 6 (step ST9). A broadcast station having the same sequence ID as the last sequence ID (= 1) acquired in step ST9 is searched from the broadcast stations extracted in step ST8 (step ST10).

In the search of step ST10, when a cross-net station is included, not only the main sequence ID but also the sub sequence ID is searched. As a result, the broadcasting station B0 having the series ID (= 1) in the sub series is detected. As a result of the search in step ST10, when a cross net broadcasting station B0 having a plurality of series IDs is extracted, the series ID (= 1) of the broadcasting station A1 is a sub-series of the broadcasting station B0. The tuner unit 1 is controlled so as to select the broadcasting station B0 based on the judgment of the same affiliated station (step ST11).
Thereby, when moving from the single affiliated station broadcast area A to the cross-net station broadcast area B, the user can continue to watch the same affiliated broadcast station without performing a channel selection operation.

  FIG. 5 shows a case where the vehicle P moves from the cross-net station broadcast area B to the single affiliated station broadcast area C. In FIG. 6, in addition to FIG. 3, broadcast stations C0 (sequence ID = 0), broadcast station C1 (ID = 1), broadcast station C2 (ID = 2), and broadcast station C3 (ID = 3) Indicates that it exists.

Next, with reference to FIGS. 5 and 6, the operation when moving from the cross-net station broadcast area B to the single affiliated station broadcast area C will be described along the flowchart of FIG.
When the station A1 is selected in the above-mentioned single affiliated station broadcast area A and then moved to the cross-net station broadcast area B, the broadcast station B0 having the same series as the substation in the broadcast station A1 automatically selects the station. The operation in the case of further moving to the single affiliated station broadcasting area C from the above state is shown.

  Broadcast station X (in this case, broadcast station B0) is automatically selected in cross-net station broadcast area B (step ST1). Next, a sequence ID that is one of the additional information is acquired from the TS stream output from the OFDM demodulator 2 (step ST2), and it is determined whether the acquired sequence ID is a single sequence ID or a multiple sequence ID. Perform (step ST3). In the example of FIG. 6, since it is determined that the ID is a multiple series ID, the last series ID is not updated, and the process proceeds to step ST5.

  Next, while watching the broadcast station B0, the reception status information (reception strength) of the OFDM demodulator 2 is monitored (step ST5), and it is determined whether or not the reception status deterioration continues for a predetermined time (step ST5). ST6). For example, when the vehicle P moves from the cross-net station broadcast area B to the single affiliated station broadcast area C, the reception state of the broadcast station B0 gradually deteriorates. In step ST6, when the reception state deterioration has not continued for a predetermined time, the process returns to step ST5 and monitoring is continued.

  On the other hand, when it is determined in step ST6 that the reception state deterioration continues for a predetermined time, the current location information output from the position information acquisition unit 30 is acquired (step ST7). Next, the broadcasting station corresponding to the current location information acquired in step ST7 is extracted from the broadcasting station information corresponding to the national broadcasting area stored in the storage unit 6 (step ST8). Further, the stored last sequence ID (= 1) is acquired from the storage unit 6 (step ST9).

A broadcast station having the same sequence ID as the last sequence ID (= 1) acquired in step ST9 is searched from the broadcast stations extracted in step ST8 (step ST10).
Based on the search result of step ST10, the tuner unit 1 is controlled to select the broadcasting station C1 (step ST11).
As a result, even when moving from the cross-net station broadcast area B to the single affiliated station broadcast area C, the user can continue to watch the same affiliated broadcast station without performing a channel selection operation.

  As described above, according to the first embodiment, when a broadcasting station having an affiliated station that was viewed in a single affiliated station broadcasting area as a main affiliate does not exist in the cross-net station broadcasting area, Since it is configured to automatically select cross-net stations that have stations in sub-series, even if the user moves from a single-affiliated station broadcast area to a cross-net station broadcast area, the same series is selected without performing a channel selection operation. Can continue watching TV stations.

  Further, according to the first embodiment, when the affiliated station that was viewed in the cross-net station broadcast area is a sub-series of the cross-net station, the series broadcast according to the last sequence ID stored in the storage unit 6 is performed. Since the stations are automatically selected, even when the user moves from the cross-net station broadcasting area to the single affiliated station broadcasting area, the user can continue to watch the same affiliated broadcasting station without performing the tuning operation. be able to.

Embodiment 2. FIG.
FIG. 7 is a block diagram showing a configuration of a digital terrestrial television receiver according to Embodiment 2 of the present invention. As shown in FIG. 7, the second embodiment shows a configuration in which a plurality of tuner units 1a and 1b and a plurality of OFDM demodulation units 2a and 2b are provided in the terrestrial digital television receiver 10. The same components as those of the terrestrial digital television receiver 10 according to the first embodiment are denoted by the same reference numerals as those used in FIG. 1, and description thereof is omitted or simplified.

  The tuner unit (reception unit) 1a receives a digital broadcast wave from the antenna 20, selects a broadcast station to be viewed, and outputs a digital signal to the OFDM demodulation unit 2a. On the other hand, the tuner unit (reception unit) 1b receives a digital broadcast wave from the antenna 21, searches for a broadcast station that can be received at the current location, selects a channel, and outputs a digital signal to the OFDM demodulation unit 2b. The OFDM demodulator 2a demodulates the digital signal output from the tuner unit 1a and outputs a TS stream, and the OFDM demodulator 2b demodulates the digital signal output from the tuner unit 1b and outputs a TS stream.

  The control unit 3 separates the TS stream output from the OFDM demodulation units 2a and 2b into video / audio data and additional information, outputs the video / audio data to the decoding unit 5, and the additional information includes only necessary information. Extracted and stored in the storage unit 6. Here, it is assumed that at least a series ID and program information are included as additional information. At that time, the control unit 3 controls the tuner unit 1b, periodically searches for a broadcast station that can be received at the current location, creates a database in which the series ID of the receivable broadcast station and the program information are associated, and the storage unit 6 To store. Further, user operation information (channel selection information) output from the operation unit 4 is analyzed to control the tuner unit 1a, current position information output from the position information acquisition unit 30 is analyzed to grasp the current position, and OFDM demodulation is performed. The reception status information (reception strength) of the units 2a and 2b is monitored.

Next, the database creation operation of the terrestrial digital television receiver 10 according to the second embodiment will be described. FIG. 8 is a flowchart showing the creation of a database in which the control unit 3 associates the receivable broadcasting station ID with program information.
The control unit 3 controls the tuner unit 1b to search for and select a broadcast station X that can be received at the current location (step ST21), and obtains the sequence ID of the selected broadcast station (step ST22).
Next, it is determined whether the sequence ID acquired in step ST22 is a single sequence ID or a multiple sequence ID (step ST23). If it is determined in step ST23 that the ID is a single series ID, a database in which the series ID is associated with the program information is created and stored in the storage unit 6 (step ST24).

  On the other hand, if it is determined in step ST23 that the ID is a multi-line ID, the process proceeds to step ST25. In step ST25, it is determined whether or not the above-described processing has been performed for all channels. If it is determined that the processing has been performed for all channels, the processing ends. On the other hand, if it is determined that processing has not been performed for all channels, the process returns to step ST21 and the above-described processing is repeated.

Next, the operation when moving from the cross-net station broadcast area B shown in FIG. 5 to the single affiliated station broadcast area C will be described in detail with reference to the flowchart of FIG.
As shown in FIG. 5, when the vehicle P moves from the cross-net station broadcast area B to the single affiliated station broadcast area C, the cross-net station broadcast area B has a broadcast station B0 series ID as shown in FIG. = 0, 1, 2, main sequence ID = 0) and broadcast station B3 (sequence ID = 3), for example, it is assumed that the broadcast station B0 is viewing. In the single affiliated station broadcast area C, the broadcast station C0 (sequence ID = 0), the broadcast station C1 (sequence ID = 1), the broadcast station C2 (sequence ID = 2), and the broadcast station C3 (sequence ID = 3). ) Exists.

  Here, the control unit 3 controls the tuner unit 1a to select the broadcast station B0, and at step ST21 controls the tuner unit 1b to periodically search for a broadcast station that can be received at the current location. When the vehicle P moves from the cross-net station broadcast area B to the single affiliated station broadcast area C, the sequence ID of the broadcast station in the single affiliated station broadcast area C searched as step ST22 is acquired. In step ST23, it is determined that the acquired sequence ID is a single sequence ID. In step ST24, a database in which the sequence ID is associated with the program information is created and stored in the storage unit 6. A specific example of the created database is shown in FIG. The program information includes a broadcast station name, a physical channel, a program name, a program start / end time, and the like.

  Next, the operation of selecting a broadcast station using the database created with reference to FIGS. 10 and 11 will be described. FIG. 10 is an explanatory diagram showing an example of a program table of a cross net station. FIG. 11 is a flowchart showing the operation of the control unit of the terrestrial digital television receiver according to the second embodiment. The same steps as those of the terrestrial digital television receiver of the first embodiment are denoted by the same reference numerals as those used in FIG. 4 to simplify the description.

  Broadcast station X (here, broadcast station B0) is selected in cross-net station broadcast area B (step ST1). Here, for example, as shown in the program table of FIG. 10, the broadcasting station B0 is “XX Variety” at time 19:00, “XX Sports” at time 20:00, and “Liberal Arts at time 21:00”. “OO” is scheduled to be broadcast, and “XX Variety” is viewed at 19:30.

  The control unit 3 acquires the sequence ID of the broadcast station B0 (step ST2) and monitors the reception status information (reception strength) of the OFDM2a while viewing the broadcast station B0 (step ST5), and the reception status deteriorates. Is determined for a predetermined time (step ST6). When the vehicle P moves from the cross-net station broadcasting area B to the single-series broadcasting station area C, it is determined in step ST6 that the reception state deterioration has continued for a predetermined time, and the single-series broadcasting stored in the storage unit 6 is determined. The database of area C is referred to (step ST31), and a broadcast station that matches the program information currently being viewed is searched (step ST32).

Specifically, it is determined that the currently viewed “XX variety” has a sequence ID = 2, and a broadcast station C2 having the sequence ID = 2 is searched from the database of the single sequence broadcast station area C. Based on the search result of step ST32, the tuner unit 1a is controlled to select the broadcasting station C2 (step ST11).
If the sequence ID corresponding to the program being viewed cannot be determined, for example, the tuner unit 1a is controlled to select the broadcast station C0 having the main sequence ID = 0 of the broadcast station B0. Also good.

  As described above, according to the second embodiment, a database in which a broadcast station that can be received in a broadcast area of a single affiliate station is periodically searched and a series ID of the receivable broadcast station is associated with program information is created. Since the broadcast station of the single affiliated station having the affiliated ID corresponding to the broadcast station that was created and referenced with reference to the database is automatically selected, the user can select a single station from the cross-net station broadcast area. Even when moving to the affiliated station broadcasting area, it is possible to continue viewing the broadcasting station of the same affiliated program and the same program without performing a tuning operation.

  1, 1a, 1b Tuner unit, 2, 2a, 2b OFDM demodulation unit, 3 control unit, 4 operation unit, 5 decoding unit, 6 storage unit, 10 terrestrial digital television receiver, 20, 21 antenna, 30 position information acquisition unit 40 remote control.

Claims (1)

In digital terrestrial television receivers that receive digital broadcast waves,
A storage unit for storing additional information included in the digital broadcast wave;
When the broadcast station being viewed becomes unreceivable, the additional station read from the storage unit is referred to based on the position information indicating the viewing position of the digital broadcast wave, and the broadcast station of the single affiliated station being viewed Search for the same broadcasting station from the main series and sub series of the cross-net station, or select the same broadcasting station as the main series or sub-series broadcasting station of the cross-net station being viewed. and a control unit for the station selected automatically retrieved from,
The control unit does not store a plurality of sequence IDs included in the additional information of the broadcasting station of the cross-net station in the storage unit, but is included in the additional information of the broadcasting station of the single affiliated station most recently selected. A digital terrestrial television receiver , wherein a sequence ID is stored in the storage unit as a last sequence ID, and a broadcast station having the same sequence ID as the last sequence ID is searched for and automatically selected .

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