JP2009206949A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver for receiving a digital broadcast signal without performing channel scanning, or without storing any channel list for each re-transmitter in advance. <P>SOLUTION: A digital broadcast receiver (100) includes a reception (101) for receiving a digital broadcast signal; a recording part (114) for recording channel list data to be used for viewing digital broadcasting; a channel list data extraction part (111) for extracting channel list data included in a received digital broadcast wave; a temporary channel list storage part (112) for temporarily storing the extracted channel list data; and a channel list rewriting part (113) for rewriting the channel list data recorded by the recording part (114) with channel list data stored in the temporary channel list storage part (112). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiving apparatus.

  In recent years, mobile terminals equipped with a function for receiving and viewing digital broadcasts (typically, “mobile phone terminals equipped with a 1-segment function”) have become widespread. Corresponding to such portable terminal users, broadcasting services only in a limited area using gap fillers are also being studied. This is to install a gap filler outside a fixed reception area such as an underground shopping mall or subway, and to extract and transmit only one segment, so that one segment can be viewed in the underground shopping mall. It is expected that such gap fillers often broadcast including unique channels (proprietary broadcasts) performed by facility owners.

  There is a method in which only one segment (segment reception segment) is extracted from a digital broadcast wave, and is transmitted after being connected (see Patent Document 1). There is also a method of extracting only one segment and retransmitting it (see Patent Document 2). There is also a method of preparing a plurality of segments for partial reception (see Patent Document 3). In addition, there is a broadcasting method limited to the area (refer to Patent Document 4).

Digital broadcasting signals in Japan are composed of one or three consecutive OFDM segments in terrestrial digital sound broadcasting (ISDB-Tsb: ISDB for Terrestrial Sound Broadcasting). Furthermore, with regard to the digital broadcast receiving function currently installed in mobile phones and the like, the channel list contains data fixed as a table (area information) for each region, and the user performs a selection operation or the mobile phone In conjunction with the built-in GPS function, the channel list is constructed by detecting serviced channels by acquiring area information from the built-in data or mobile phone network, or scanning the entire receivable frequency range. Was.
JP 2006-109283 A JP 2005-341195 A Japanese Unexamined Patent Publication No. 2006-20128 JP 2006-279376 A

  The conventional retransmission apparatus can retransmit at a frequency different from that of the terrestrial broadcast wave, and since the reception frequency is different from the terrestrial area, the channel list used by the mobile receiver for channel selection is It was necessary to obtain the image by performing a time-consuming operation such as a scan operation again. The retransmission device not only retransmits the digital broadcast signal received by terrestrial, but also can transmit local channels (proprietary broadcast and original channel) that can be provided only in the retransmission area. A service (that is, a program) that is different from the channel list to be added is added, but a channel list configured by a terrestrial area (for example, specified at the prefectural border level) cannot include local channels. There is a problem that local programs cannot be received.

  Most of the current broadcasting networks are wide-area networks, and when a large number of devices that provide services only in a limited area such as a retransmission device are installed, it is necessary to prepare a channel list for each of them. It is necessary to consume a large amount of memory in order to incorporate a channel list data group. Furthermore, since it is considered that such a re-transmission apparatus is often operated by a small-scale business operator, it is highly likely that the re-transmission apparatus is installed, removed, or the channel list is changed frequently. With respect to such channel list data, it is difficult to constantly update the channel list (data) of all retransmission apparatuses to the latest one.

  In addition, there are many places outside the mobile phone service area, such as underground shopping centers and subways, that receive and watch broadcast waves sent from the retransmitting device. It is also difficult to get from.

  Therefore, the present invention receives a digital broadcast signal that can be received without performing a channel scan that is necessary every time it enters the area of the retransmission apparatus, or without holding a channel list for each retransmission apparatus in advance. An object of the present invention is to provide a digital broadcast receiving apparatus.

In order to solve the above-described problems, the digital broadcast receiving apparatus according to the first invention provides:
A receiver for receiving a digital broadcast signal;
A recording unit (channel list storage unit) for recording channel list data used for viewing digital broadcasting;
A channel list data extracting unit for extracting channel list data included in the digital broadcast wave received by the receiving unit;
A temporary channel list storage unit for temporarily storing channel list data extracted by the extraction unit;
A channel list rewriting unit for rewriting channel list data recorded in the recording unit to channel list data stored in the temporary channel list storage unit;
With

The digital broadcast receiver according to the second invention is
The channel list rewriting unit
When the channel list is extracted by the channel list data extraction unit and the channel list is stored in the temporary channel list storage unit, the channel list data recorded in the recording unit is stored in the temporary channel list storage unit. Rewrite to saved channel list data,
It is characterized by that.

The digital broadcast receiver according to the third invention is
A storage unit for storing channel list data for each area;
A channel list designating unit that accepts a desired channel list (or area) by the user;
In response to the channel list received by the channel list designating unit, the corresponding channel list data is read from the storage unit and stored in the designated channel list storage unit, further comprising:
The channel rewriting unit
When the digital broadcast signal corresponding to the rewritten channel list data cannot be received by the receiving unit, the channel list data stored in the temporary channel list storing unit is discarded and stored in the channel list storing unit. Rewriting the stored channel list data with channel list data corresponding to the channel list received by the channel list designating unit (that is, returning to the state before rewriting),
It is characterized by that.

According to a fourth aspect of the present invention, there is provided a digital broadcast receiver.
A final channel storage unit for storing final channel information selected by the user;
The final channel storage unit
Only the channel information stored in the designated channel list storage unit is configured to be stored as the final channel information.
It is characterized by that.

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium storing the program, which are substantially equivalent to these. It should be understood that these are also included. In addition, each step of the following method and program uses an arithmetic processing unit such as a CPU or DSP as necessary in data processing, and the input data, processed / generated data, etc. are stored in the HDD, It is stored in a storage device such as a memory.

For example, the method according to the fifth aspect of the present invention realized as a method is as follows:
Receiving a digital broadcast signal;
Recording channel list data used to view digital broadcasts;
Extracting channel list data contained in the received digital broadcast wave;
Temporarily storing the extracted channel list data;
Rewriting the channel list data recorded in the recording unit to channel list data temporarily stored;
It is characterized by having.

  According to the present invention, the channel list for each retransmission apparatus can be obtained without performing a channel scan that is necessary every time it enters the area of the retransmission apparatus, or without acquiring a channel list via the network. It is possible to receive a digital broadcast signal even if this is not done in advance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Although the present invention is directed to a receiving apparatus, a retransmitting apparatus that transmits a digital broadcast signal received by the receiving apparatus is also described in the embodiment.

  FIG. 1 is a block diagram of a digital broadcast retransmission apparatus according to an embodiment of the present invention. As shown in the figure, a digital broadcast retransmitting apparatus 200 includes a receiving antenna 201, receiving units 202a, 202b,..., 202n, segment extracting units 203a, 203b, ..., 203n, program information extracting units 204a, 204b,. 204n, a channel list generation unit 205, channel list addition units 206a, 206b,..., 206n, a segment connection unit 207, a transmission unit 208, and a transmission antenna 209. The receiving antenna 201 receives a terrestrial wave (digital broadcast signal) and passes it to receiving units 202a, 202b,..., 202n for receiving each channel of the received terrestrial signal. In this embodiment, a description will be given in a format in which sequences (reception units, extraction units, etc.) for the number of terrestrial channels that need to be retransmitted are provided, but a “single reception unit” that processes a plurality of sequences or An aspect such as “single extraction unit” may be used.

  Segments are extracted by segment extraction units 203a, 203b,..., 203n that extract only segments to be retransmitted from each channel, and segment extraction units 203a, 203b,..., 203n are extracted by program information extraction units 204a, 204b,. At least a broadcasting station name and a remote control ID (hereinafter referred to as “program information”) are extracted from the demultiplexing information (for example, SI / PSI information) for separating a specific program of the digital broadcast signal extracted in step 1. . The channel list generation unit 205 assigns a physical channel number and a subchannel number to the program information extracted for each channel in accordance with the segment to be rearranged and the physical channel to be retransmitted, respectively. Is generated.

  Channel list adding units (adding units) 206a, 206b,..., 206n generate channel list data necessary for service, or information for creating channel list data or channel lists in a section format as shown in FIG. Then, the channel list data or information for creating the channel list is packetized and periodically (added) in the stream. As a periodic arrangement (addition) method, it is desirable that the cycle is the same as that of a PMT (Program Map Table), but a cycle of about 2 to 3 times the PMT may be used in order to prevent an increase in transmission rate. If the channel list data or the information for creating the channel list cannot be accommodated in the data (184 bytes) in one TS packet, the channel list data or the information for creating the channel list is divided into a plurality of TS packets. It may be arranged (added) to be transmitted.

  The retransmitting apparatus 200 further includes remodulators 213a, 213b,..., 213n in order to cope with a stream whose data amount has increased by adding a channel list. Stream with increased data amount due to added channel list data or TS packet of information for creating channel list is higher than the transmission rate indicated by the modulation method and error correction code rate used in the received broadcast wave When the transmission rate is necessary, the code rate is increased (for example, from 1/2 to 2/3) or the modulation method is changed (for example, from QPSK to 16QAM) by the remodulators 213a, 213b,. Change) to ensure an appropriate transmission rate capable of transmitting a larger amount of data. In a re-transmission apparatus that performs retransmission in a limited area, it is not necessary to inherit the modulation method and code rate used in digital terrestrial broadcasting as they are, and the modulation method so that the required quality can be ensured in the service area. It is desirable that a code rate limit model is set in advance so that the remodulators 213a, 213b,..., 213n do not set parameters exceeding the limit model. If remodulation is not necessary, the maximum modulation may not be performed.

  The retransmitting device 200 further includes packet generators 214a, 214b,..., 214n in order to cope with the case where the data amount increased by the remodulators 213a, 213b,. That is, if the added channel list data or the TS packet of information for creating the channel list requires a higher transmission rate than the transmission rate used in the received broadcast wave, the stream whose data amount has increased When the generation unit 214a, 214b,..., 214n searches for a null packet included in the original broadcast wave stream and removes the null packet, the transmission rate can be ensured. Secure the transmission rate.

  The segment connecting unit 207 performs segment concatenation of the digital broadcast signals for each channel output from the remodulating units 213a, 213b, ..., 213n according to a predetermined segment arrangement. The digital broadcast signals connected by the segment connecting unit 207 are retransmitted via the transmitting unit 208 and the transmitting antenna 209.

  Not only to retransmit terrestrial waves, but also to support cases where broadcast content transmitted via an optical line or the like and broadcast content stored in the storage unit (storage system) 212 are included in the connected digital broadcast signal The retransmission apparatus 200 further includes an ISDB-T format conversion unit 210, an optical cable interface 211, a storage unit 212, a channel list addition unit 206x, a packet generation unit 214x, and a remodulation unit 213x. As described above, when segments other than the received terrestrial (digital broadcast signal) are connected, the optical cable interface 211 connected to the optical line and the broadcast content input from the storage system 212 are converted into an ISDB-T format conversion unit. 210 converts the signal into an ISDB-T format signal. Program information is extracted at the time of ISDB-T format conversion, and channel list data or information for creating a channel list is packetized and transmitted as in the case of terrestrial retransmission.

  FIG. 2 is a block diagram of a digital broadcast receiver according to an embodiment of the present invention. As shown in the figure, the receiving apparatus 100 includes a receiving unit 101, a DEMUX 102, an audio decoding unit 103, a video decoding unit 104, a speaker 105, a display unit 106, a caption processing unit 107, a data broadcast processing unit 108, and an SI / PSI decoder. Part 109 is provided. The receiving apparatus 100 includes a program information acquisition unit 110, a channel list data extraction unit 111, a temporary channel list storage unit 112, a channel list rewrite unit 113, a channel list storage unit 114, a channel selection control unit 115, and a designated channel list storage unit. 116, a channel list designation unit 117, a storage unit 118, a final channel storage unit 119, and an antenna ANT.

  The receiving unit 101 receives a digital broadcast signal received by the antenna ANT, and receives a digital broadcast signal of an arbitrary segment from the received signal. After the digital broadcast signal is demultiplexed by the DEMUX 102, the audio ES (Elementary Stream) is decoded by the audio decoding unit 103 and output through the speaker 105 as audio. The video ES is decoded by the video decoding unit 104. The caption ES is processed by the caption processing unit 107, and the data broadcast included in the data carousel is processed by the data broadcast processing unit 108, and finally displayed via the display unit 106. The program information acquisition unit 110 acquires the program name and broadcast station name of the received digital broadcast signal. The acquired information is displayed on the screen by the display unit 106 at the time of channel switching or at all times.

  The SI / PSI decoder unit 109 detects section data (PSI / SI information) as shown in FIG. 3 included in the digital broadcast signal, and in the case of information for creating channel list data or a channel list, The channel list data extraction unit 111 extracts channel list data or information for creating a channel list, reconverts it into a format required by the receiver, and stores it in the temporary channel list storage unit 112 as a channel list. Here, demultiplexing information for separating a specific program, for example, PSI (Program Specific Information) is referred to as program specific information and is information necessary for selecting a program. SI (Service Information) Is information defined for convenience of program selection, referred to as program arrangement information. Also, it is preferable to add the channel list added by the channel list adding unit of the retransmission apparatus or information for creating the channel list to the SI information field. When the channel list is extracted by the channel list data extraction unit 111 and the channel list data is stored in the temporary channel list storage unit 112, the “channel” currently used (set) for viewing digital TV The “channel list data recorded in the list storage unit 114” is rewritten by the channel list rewriting unit 113 to “channel list data” stored in the temporary channel list storage unit 112. By performing the rewriting, it is possible to use the channel list limited to the area where the current digital broadcast signal can be received as the subsequent channel list. The temporary channel list storage unit 112 and the channel list storage unit 114 can be configured in the same nonvolatile memory or volatile memory.

  In general, the channel list is channel list data for each area of local governments and regions such as prefectures stored in the storage unit 118 which is an internal database of the digital broadcast receiving device, channel list data obtained by scanning broadcast waves, There is channel list data acquired using a network using positioning data such as GPS (Global Positioning System), and these are acquired and recorded by the user operating the receiving device. For example, the channel list designating unit 117 accepts input of a designated channel list desired by the user (for example, item number or area name in the list) from the channel list displayed on the display unit, and the designated channel list from the storage unit 118. And the designated channel list is stored in the designated channel list storage unit 116. The channel list in the storage unit 118 preferably stores an area name (for example, Kanto wide area, Tokyo, Kanagawa Prefecture, etc.) and a channel list name in association with each other.

  Such channel list data is stored in a designated channel list storage unit 116 constituted by a nonvolatile memory or a volatile memory. After rewriting to the channel list of the temporary channel list storage unit 112 as described above, it is received that the digital broadcast signal cannot be received, such as when moving to an area where the broadcast wave within the specific area transmitted from the retransmission apparatus cannot be received. If detected by the unit 101, the channel list designating unit 117 discards the channel list recorded in the channel list storage unit 114 and restores the channel list data recorded in the designated channel list storage unit 116. This makes it possible to receive digital broadcast signals in the terrestrial area. That is, the receiving device 100 temporarily uses the channel list corresponding to the broadcast signal only while the “digital broadcast signal with segments connected” transmitted from the retransmitting device 200 can be received. Then, when the receiving apparatus 100 cannot receive the “digital broadcast signal with the segments connected” transmitted from the retransmitting apparatus 200 and receives only normal wide-area broadcasting, the receiving apparatus 100 immediately receives the channel list. Is discarded. Thus, the user of the receiving device can perform a digital broadcast service (program) by a normal operation regardless of whether the received broadcast signal is from the retransmitting device or from a wide-area broadcasting station (device). ) Can be viewed. In addition, even when the retransmitting apparatus 200 is carrying out an original broadcast (original program), the user can select a service (program) of the segment of the original broadcast by a normal channel operation.

  The last channel storage unit 119 stores last channel information selected by the user. The final channel storage unit 119 is configured to store only the channel information stored in the designated channel list storage unit 116 as “final channel information”. That is, since the channel list data channel stored in the temporary channel list storage unit 112 is temporarily used, it is considered that the frequency of using it as the final channel is very low, so it is excluded from the final channel. Is preferred.

  FIG. 3 is a diagram illustrating a format of channel list data transmitted by the retransmission apparatus according to the present embodiment. As shown in the figure, the digital broadcast signal conforms to the transmission format of TS packets (transport stream packets) defined by MPEG-2. In this example, transmission is performed in the format indicated by the section transmission method as an example of channel list data packetized in the TS packet format. The channel list data is stored in the data byte field D1, and the data byte field D1 extends to the channel list data sections F0 to Fn. Each section of the channel list data section F0-Fn is composed of a remote control ID, a physical channel number, a physical subchannel number, a broadcast station name length (number of bytes), and a broadcast station name. The configuration includes data of all channels to be performed.

<Embodiment 1>
FIG. 4 is a flowchart illustrating an example (embodiment 1) of processing performed by the retransmission apparatus illustrated in FIG. As shown in the figure, in step S11, each receiving unit 202a-202n receives a broadcast wave on each channel. In step S12, each segment extraction part 203a-203n extracts the segment which should be retransmitted from the broadcast wave of each channel. Next, in step S13, each program information extraction part 204a-204n extracts program information from each extracted segment. In step S14, the channel list generation unit 205 receives “extracted program information” from each program information extraction unit 204a-204n, and adds “physical channel” to the “extracted program information”. Alternatively, “information (data) for creating a channel list” is generated.

  Thereafter, in step S15, “channel list data” is generated from “generated channel list” or “information (data) for creating channel list”, and is periodically arranged in the stream of each segment ( to add. Next, in step S16, the segment connecting unit 207 connects a plurality of segments, transmits a broadcast wave including the connected segments, and ends the process. When retransmitting the original broadcast (original program) from the data in the optical line or the storage unit 212, the ISDB-T format conversion unit 210 executes the process of step S11-13, and in step S14, the channel list The generation unit 205 receives “extracted program information” from the program information extraction units 204a to 204n and the ISDB-T format conversion unit 210, and thereafter performs the same processing. Thus, in this embodiment (and all the following embodiments), it is possible to generate a channel list including program information of a unique method (original program). In step S15, information for creating a channel list serving as a source for the channel list data to be generated by the receiving apparatus may be arranged (added).

<Embodiment 2>
FIG. 5 is a flowchart illustrating an example (embodiment 2) of processing performed by the retransmission apparatus illustrated in FIG. Steps S21-25 and S28 in FIG. 5 are the same processes as steps S11-15 and S16 in FIG. 4 (embodiment 1), and a description thereof will be omitted. That is, only the processes changed from those of the first embodiment among the processes of the second embodiment will be described. As shown in FIG. 5, after step S25 is executed, in step S26, the remodulators 213a to 213n determine the amount of data after arranging the channel list data for each segment (channel) at the current transmission rate. It is determined whether or not transmission is possible. If it is determined that the data amount cannot be transmitted at the current transmission rate, at least the segment (channel) for which such determination has been made, in step S27, the code rate is increased and / or modulated. Change the method. If it is determined that the data amount can be transmitted at the current transmission rate, the process proceeds to step S28. The subsequent processing is the same as that of the other embodiments. According to this embodiment, even when the “data amount” to be transmitted per unit time increases due to the addition of channel list data, the broadcast wave is retransmitted without any problem by increasing the transmission rate. It becomes possible.

<Embodiment 3>
FIG. 6 is a flowchart illustrating an example (embodiment 3) of processing performed by the retransmission apparatus illustrated in FIG. Steps S31-37 and S40 in FIG. 6 are the same processes as steps S21-27 and S28 in FIG. 5 (embodiment 2), and a description thereof will be omitted. That is, only the processes changed from those of the embodiment 2 among the processes of the embodiment 3 will be described. As shown in FIG. 6, after executing step S37, whether the remodulation units 213a to 213n exceed the bit rate that can be transmitted even if the code rate is increased and the modulation method is changed in step S38. Determine whether or not. If it is determined that the transmission rate exceeds the bit rate even if the code rate is increased and the modulation method is changed, in step S39, the packet generation unit 214a-214n at least determines the segment. In (channel), at least a part of the NULL packet included in the digital broadcast signal is removed, and the data amount of the segment is reduced below the bit rate that can be transmitted. The subsequent processing is the same as that of the other embodiments. According to this embodiment, even if the “data amount” to be transmitted per unit time increases due to the addition of channel list data and the increase cannot be absorbed even by an increase in code rate and a change in modulation scheme, By removing null packets from the increase, it is possible to retransmit the broadcast wave without any problem by increasing the “effective transmission rate”.

<Embodiment 4>
FIG. 7 is a flowchart illustrating an example (embodiment 4) of processing performed by the receiving apparatus illustrated in FIG. As shown in the figure, in step P11, the receiving unit 101 receives a digital broadcast signal. Next, in step P12, the channel list storage unit (recording unit) 114 records channel list data used for viewing digital broadcasting. Next, in step P13, the channel list data extraction unit 111 extracts channel list data included in the received digital broadcast wave. Thereafter, in step P14, the temporary channel list storage unit 112 temporarily stores the extracted channel list data. Finally, in step P15, the channel list rewriting unit 113 rewrites the channel list data recorded in the channel list storage unit 114 with the channel list data stored in the temporary channel list storage unit 112, and the process ends. Through the above-described processing, the channel list required for each retransmission device is not scanned, the channel list is not acquired via the network, or the channel list for each retransmission device is stored in advance. It is possible to receive a digital broadcast signal retransmitted from the transmission device without the transmission. When information (data) for creating a channel list is extracted at step P13, channel list data is generated based on the information (data).

<Embodiment 5>
FIG. 8 is a flowchart showing an example (embodiment 5) of processing performed by the receiving apparatus shown in FIG. Step P21-25 in FIG. 8 is the same process as step P11-15 in FIG. 7 (embodiment 4), and a description thereof will be omitted. That is, only the processes changed from those of the fourth embodiment among the processes of the fifth embodiment will be described. As shown in FIG. 8, after executing Step P <b> 25, the process waits until the digital broadcast signal corresponding to the rewritten channel list data cannot be received by the receiving unit 101 in Step P <b> 26. If reception by the reception unit 101 is disabled, the channel rewriting unit 113 discards the channel list data stored in the temporary channel list storage unit 112 and is stored in the channel list storage unit 114 in step P27. The channel list data is rewritten with the channel list data corresponding to the channel list received by the channel list designating unit 117 (that is, returned to the state before the rewriting). According to this configuration, the user carrying the digital broadcast receiving device can smoothly shift to normal wide area channel (program) viewing after leaving the transmission area of the retransmitting device.

  The advantages of the present invention will be described again. The digital broadcast signal retransmitting apparatus according to each embodiment of the present invention can reorganize a channel list corresponding to the frequency and channel for retransmitting, and send it out in the digital broadcast signal wave to be retransmitted. Moreover, in the broadcast receiving apparatus in each embodiment of the present invention, the information of the channel list for each area that is serviced for each digital broadcast signal retransmission apparatus is obtained from the digital broadcast signal transmitted by the digital broadcast signal retransmission apparatus. It becomes possible to receive the retransmitted wave with certainty. Furthermore, even when a local broadcast service is implemented for each digital broadcast signal retransmitting apparatus, it is possible to acquire local broadcast service information without requiring a troublesome operation such as a channel scan operation. Further, it is not necessary to store a different channel list in each receiving apparatus for each digital broadcast signal retransmitting apparatus, and a channel list adapted to the area can be presented with a small memory.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each unit, each means, each step, etc. can be rearranged so as not to be logically contradictory, and a plurality of means, steps, etc. can be combined or divided into one. It is.

1 is a block diagram of a digital broadcast retransmission apparatus according to an embodiment of the present invention. 1 is a block diagram of a digital broadcast receiver according to an embodiment of the present invention. It is a figure showing the format of the channel list data transmitted by a re-transmission apparatus. 6 is a flowchart illustrating an example (embodiment 1) of processing performed by the retransmission apparatus illustrated in FIG. 1. 10 is a flowchart illustrating an example (embodiment 2) of processing performed by the retransmission apparatus illustrated in FIG. 1. 10 is a flowchart illustrating an example (embodiment 3) of processing performed by the retransmission apparatus illustrated in FIG. 1. 6 is a flowchart illustrating an example (embodiment 4) of processing performed by the receiving apparatus illustrated in FIG. 2. 10 is a flowchart illustrating an example (embodiment 5) of processing performed by the receiving apparatus illustrated in FIG. 2.

Explanation of symbols

100 receiving device 101 receiving unit 103 audio decoding unit 104 video decoding unit 105 speaker 106 display unit 107 caption processing unit 108 data broadcast processing unit 109 SI / PSI decoder unit 110 program information acquisition unit 111 channel list data extraction unit 112 temporary channel list storage Unit 113 channel list rewriting unit 114 channel list storage unit 115 channel selection control unit 116 designated channel list storage unit 117 channel list designation unit 118 storage unit 119 final channel storage unit ANT antenna 200 retransmitting device 201 receiving antennas 202a, 202b,. 202n receiving units 203a, 203b,..., 203n segment extracting units 204a, 204b,..., 204n program information extracting unit 205 channel list generating units 206a, 206b,. 6x channel list addition unit 207 segment connection unit 208 transmission unit 209 transmission antenna 210 ISDB-T format conversion unit 211 optical cable interface 212 storage unit 212 storage system 212 storage units 213a, 213b, ..., 213n, 213x remodulation units 214a, 214b, ..., 214n, 214x Packet generator D1 Data byte field F0-Fn Channel list data section

Claims (4)

A receiver for receiving a digital broadcast signal;
A recording unit for recording channel list data used for viewing digital broadcasting;
A channel list data extracting unit for extracting channel list data included in the digital broadcast wave received by the receiving unit;
A temporary channel list storage unit for temporarily storing channel list data extracted by the extraction unit;
A channel list rewriting unit that rewrites the channel list data recorded in the recording unit to channel list data stored in the temporary channel list storage unit;
A digital broadcast receiving apparatus. The digital broadcast receiver according to claim 1,
The channel list rewriting unit
When the channel list is extracted by the channel list data extraction unit and the channel list is stored in the temporary channel list storage unit, the channel list data recorded in the recording unit is stored in the temporary channel list storage unit. Rewrite to saved channel list data,
A digital broadcast receiver characterized by that. In the digital broadcast receiver according to claim 1 or 2,
A storage unit for storing channel list data for each area;
A channel list designating unit for receiving a desired channel list by the user;
In response to the channel list received by the channel list designating unit, the corresponding channel list data is read from the storage unit and stored in the designated channel list storage unit, further comprising:
The channel rewriting unit
When the digital broadcast signal corresponding to the rewritten channel list data cannot be received by the receiving unit, the channel list data stored in the temporary channel list storing unit is discarded and stored in the channel list storing unit. Rewriting the stored channel list data with the channel list data corresponding to the channel list received by the channel list designating unit,
A digital broadcast receiver characterized by that. In the digital broadcast receiver according to any one of claims 1 to 3,
A final channel storage unit for storing final channel information selected by the user;
The final channel storage unit
Only the channel information stored in the designated channel list storage unit is configured to be stored as the final channel information.
A digital broadcast receiver characterized by that.

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