JP2009152775A - Digital television broadcast signal receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve troublesomeness in viewing a digital television broadcast signal receiver by enabling broadcast channel selection of terrestrial digital television broadcast signals conforming to DVB-T standards and disabling selection of broadcast channels in countries from which the user does not want to view in an area where broadcast signals of a plurality of countries can be received. <P>SOLUTION: A tuner 11 and a TS demultiplexer 12 search out a physical channel of terrestrial digital television broadcast signals conforming to the DVB-T standards, and a TS superimposed thereon as a logic channel, i.e. a broadcast channel is acquired, thereby enabling broadcast channel selection. Further, a control section 13 creates a country-by-country channel list for each country identification information acquired from the broadcast signals, so that only by selecting the channel list, only the broadcast channels of the country from which the user wants to view can be selected based on the selected country-by-country list even in an area where the broadcast signals from a plurality of countries can be received. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital television broadcast signal receiving apparatus that receives a terrestrial digital television broadcast signal compliant with DVB-T (Digital Video Broadcasting-Terrestrial) standards.

  In recent years, terrestrial television broadcast signals have been digitized in various countries around the world. For example, terrestrial digital television broadcasts are being implemented in Europe. In European countries, the DVB-T (Digital Video Broadcasting-Terrestrial) standard is adopted as a standard for digital terrestrial television broadcasting. For each country, a plurality of physical channels in terrestrial digital television broadcast signals (hereinafter referred to as broadcast signals), that is, Carrier carrier frequency is assigned. A plurality of logical channels are superimposed on each carrier carrier wave in a transport stream format composed of a plurality of streams. A logical channel is a broadcast channel that is selected by a user when watching television, and one physical channel is assigned to a plurality of broadcast stations.

  When a digital television broadcast signal receiving device (hereinafter referred to as a receiving device) capable of receiving the broadcast signal is installed near the border, the receiving device may receive a broadcast signal of an adjacent country. When neighboring countries adopt the same standard as in Europe, video signals of digital television broadcasts from a plurality of countries are output to the monitor device connected to the receiving device. Therefore, when a broadcast channel is selected, even a broadcast channel in a country that the user does not want to view is selected, and the video of the broadcast channel may be output from the monitor device, which may be troublesome for some users. .

  By the way, in Patent Document 1, a remote controller for channel selection is provided, and when the apparatus moves to an area where channels of a plurality of broadcast areas cross, a plurality of channels are assigned to one remote control number key, and the key Therefore, a broadcast receiving apparatus that enables channel selection by toggle channel selection is disclosed.

  However, this broadcast receiving apparatus is originally assumed to be a mobile apparatus, and when a user installs the apparatus in an arbitrary place and wants to view only a channel in one broadcast area, a plurality of the above keys are used. If the operation is performed once, even a channel in a broadcast area where viewing is not desired is selected.

  Further, in Patent Document 2, a channel group for each region in which channels are listed is stored in advance, region identification information included in the transport stream is detected, and a channel group is selected based on the detection result. A digital broadcast receiving apparatus that uses the channel list as a channel list is disclosed.

  Also, in Patent Document 3, a channel list that lists only physical channels that can be selected by the user is first created, and then when a user-desired physical channel is selected, PSI / SI ( There is disclosed a digital broadcast receiving apparatus that registers specific information of a physical channel included in Program Specific Information / Service Information) in a channel list.

  In the devices disclosed in Patent Document 2 and Patent Document 3 described above, the broadcast signal of the physical channel selected by the tuner is demodulated into a transport stream by the demodulator. Then, the video, audio and the like multiplexed on the transport stream are separated by the demultiplexing unit, and are decoded. That is, the above apparatus only supports broadcast signals in which one broadcast station is assigned to one physical channel. For this reason, it is impossible to select a channel of a broadcast signal compliant with the DVB-T standard, that is, to select a broadcast station.

  Further, in Patent Document 4, a program that can be received in each region is registered in a memory as reception information for each region, and a program that can be received in the reception region is automatically selected just by specifying the reception region from the keyboard. A broadcast receiving apparatus is disclosed. However, a configuration capable of receiving a terrestrial digital television broadcast signal is not disclosed.

  Patent Document 5 is configured to be able to receive digital broadcasts, and performs radio wave reception by specifying a channel that is defined as a station on the channel list, determines reception sensitivity, and has the highest reception sensitivity when the apparatus is activated. A broadcast receiving apparatus that selects a certain channel and executes broadcast reception is disclosed. Therefore, channel selection has nothing to do with whether the channel is desired by the user.

Therefore, in the technologies described in Patent Documents 1 to 5, a user can select a broadcast channel of a terrestrial digital television broadcast signal compliant with the DVB-T standard, and a region where the broadcast signal from a plurality of countries is available. However, it is difficult to solve the problem that even a broadcast channel in a country that the user does not want to view is selected when selecting a broadcast channel. For this reason, it is difficult to eliminate the troublesomeness during viewing.
JP 2006-279663 A JP 2006-013765 A JP 2006-157818 A JP-A-5-090909 JP 2007-228307 A

  The present invention has been made in order to solve the above-described conventional problems, enables broadcast channel selection of a terrestrial digital television broadcast signal compliant with the DVB-T standard, and the broadcast signal from a plurality of countries. In a region where the user can receive the broadcast, only the broadcast channel of the country that the user wants to watch can be selected, so that the broadcast channel of the country where the user does not want to watch cannot be selected and the trouble of viewing is reduced. An object of the present invention is to provide a digital television broadcast signal receiving apparatus that can be eliminated.

  In order to achieve the above object, the first aspect of the present invention is to receive a terrestrial digital television broadcast signal (hereinafter referred to as a broadcast signal) conforming to the DVB-T (Digital Video Broadcasting-Terrestrial) standard and to receive the physical channel of the broadcast signal. In a digital television broadcast signal receiving apparatus comprising: channel search means for searching for; and stream acquisition means for acquiring a transport stream superimposed as a logical channel on the broadcast signal of the physical channel searched for by the channel search means, Information acquisition means for acquiring country identification information assigned to each physical channel and indicating the transmission country of the broadcast signal, from the broadcast signal of the physical channel found by the channel search means, and the country identification acquired by the information acquisition means Information and the channel search means Storage means for associating and storing physical channel information indicating a physical channel, logical channel information indicating a logical channel corresponding to a transport stream acquired by the stream acquisition means, and for each country identification information, the physical channel information A country channel list in which information and logical channel information are associated with each other is created with reference to the storage means, and list creation means for storing the list in the storage means is further provided.

  The invention of claim 2 is a channel search means for receiving a terrestrial digital television broadcast signal (hereinafter referred to as a broadcast signal) compliant with DVB-T (Digital Video Broadcasting-Terrestrial) standard and searching for a physical channel of the broadcast signal; In a digital television broadcast signal receiving apparatus having a stream acquisition means for acquiring a transport stream superimposed as a logical channel on a broadcast signal of a physical channel found by the channel search means, the channel search means finds Information acquisition means for acquiring country identification information assigned to each physical channel and indicating the country of transmission of the broadcast signal from the broadcast signal of the physical channel, country identification information acquired by the information acquisition means, and the channel search means Indicates the physical channel found by Storage means for associating and storing logical channel information, logical channel information indicating a logical channel corresponding to the transport stream acquired by the stream acquisition means, and for setting a country in which the user desires to watch digital TV broadcasting A channel selection unit that selects a logical channel with reference to the storage unit based on a setting unit, a channel up / down key for selecting the logical channel in ascending or descending order, and an operation of the channel up / down key. And a storage unit that stores in advance a country identification information list that associates the country set by the setting unit with the country identification information, and the channel selection unit selects the country set by the setting unit. Country identification information is acquired by referring to the country identification information list, and the acquired country identification information and the next channel are selected. If the country identification information of a constant logical channels match, selects a logical channel, if they do not match, is to skip the logical channel.

  According to a third aspect of the present invention, in the digital television broadcast signal receiving apparatus according to the first or second aspect, the country identification information is an original in an NIT (Network Information Table) included in a transport stream packet of the broadcast signal. It is a network ID.

  According to the first aspect of the present invention, the channel search means receives a terrestrial digital television broadcast signal (hereinafter referred to as a broadcast signal) compliant with the DVB-T standard, searches for its physical channel, and the stream acquisition means A transport stream superimposed as a logical channel on the broadcast signal of the found physical channel is acquired, and in the above standard, the logical channel corresponds to the broadcast channel of the broadcast station, so it conforms to the above standard It is possible to select a broadcast channel for the broadcast signal.

  Further, the information acquisition unit acquires a country identification signal from the broadcast signal, and the list generation unit generates a country-specific channel list in which physical channel information and logical channel information, that is, broadcast channel information are associated with each country identification information. Therefore, by selecting this country-specific channel list, only the broadcast channels in the country that the user wants to view can be selected based on the selected country-specific channel list even in an area where the broadcast signals from a plurality of countries can be received. It becomes possible to tune in. Therefore, it becomes impossible to select a broadcasting channel in a country where viewing is not desired, and the troublesomeness at the time of viewing can be eliminated.

  According to the second aspect of the present invention, as in the first aspect of the present invention, it is possible to obtain the effect of enabling broadcast channel selection of a broadcast signal compliant with the DVB-T standard, and further, channel up / down. When selecting a logical channel based on key operations, the logical channel of the country set by the setting means is selected, and the logical channels of countries other than that country are skipped, so the broadcast signals from multiple countries can be received. Even in a certain region, it is possible to select only the channel of the country that the user wants to watch. Therefore, it becomes impossible to select a broadcasting channel in a country where viewing is not desired, and the troublesomeness at the time of viewing can be eliminated.

  According to the invention of claim 3, the same effect as that of the invention of claim 1 or claim 2 can be obtained.

Hereinafter, digital television broadcast signal receivers (hereinafter referred to as receivers) according to various embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a configuration of a receiving apparatus according to the first embodiment of the present invention. The receiving apparatus 1 of the present embodiment receives a digital terrestrial television broadcast signal compliant with the DVB-T (Digital Video Broadcasting-Terrestrial) standard adopted in Europe and the like, particularly the DVB-SI (Digital Video Broadcasting-Service Information) standard. It is configured to be receivable (hereinafter referred to as a broadcast signal). In the above standard, a plurality of physical channels, that is, carrier carrier frequencies in a broadcast signal are allocated for each country, and each carrier carrier is composed of a plurality of streams corresponding to each of a plurality of logical channels. A stream (Transport Stream; hereinafter referred to as TS) is superimposed. The logical channel corresponds to the broadcast channel selected by the user when viewing the television.

  The receiving apparatus 1 receives a broadcast signal transmitted from a broadcast station using an antenna 2 and searches for a physical channel of the broadcast signal by a tuner 11 (channel search means), and a broadcast signal of the physical channel searched by the tuner 11. Are provided with a TS demultiplexer 12 (stream acquisition means) for acquiring TSs superimposed as logical channels.

  The receiving device 1 also includes a control unit 13 that instructs the tuner 11 to perform a channel search over a receivable frequency band, and a storage unit 14 (storage unit) that stores various types of information. From the broadcast signal of the physical channel searched for by the tuner 11, the control unit 13 assigns each physical channel to country identification information indicating the transmission country of the broadcast signal, and physical channel information indicating the searched physical channel. The logical channel information indicating the logical channel corresponding to the TS extracted by the TS demultiplexer 12 is acquired. Then, the control unit 13 associates the country identification information, physical channel information, and logical channel information with each other, and stores them in the storage unit 14 as needed during the channel search. After the channel search, the control unit 13 creates a country-specific channel list in which physical channel information and TS information are associated with each other for the country identification information that matches each other with reference to the storage unit 14, and stores the country-specific channel list in the storage unit 14 (List creation means).

  Further, the receiving apparatus 1 decodes a video, audio or data signal (hereinafter referred to as a video signal) stored in a TS packet of a stream selected from the TS by the TS demultiplexer 12, and monitors it. 3 includes a decoding processing circuit 15 to be sent to 3, a remote control 16 for wirelessly transmitting a signal for remotely operating the control unit 13, and a wireless reception unit 17 for receiving a signal from the remote control 16 and sending it to the control unit 13. .

  The TS demultiplexer 12 extracts a TS packet storing NIT (Network Information Table) from the TS. The NIT stores country identification information called an original network ID, and information such as a physical channel number, a logical channel number, and a broadcasting station name for each logical channel. By the way, a PID (packet identifier) composed of 13-bit information is attached to each TS packet, and the PID of the TS packet including NIT is set to 0x10, for example. Therefore, the TS demultiplexer 12 searches for a TS packet with a PID of 0x10, extracts the NIT from the TS packet, and extracts information on the physical channel number, original network ID, and logical channel number from the NIT. These are sent to the control unit 13 as physical channel information, country identification information, and logical channel information.

  In addition, when the user selects an arbitrary channel, the TS demultiplexer 12 extracts a stream corresponding to the selected channel, that is, a logical channel from the TS, extracts a TS packet of the stream, and outputs the TS packet to the decoding processing circuit 15. To do. The extraction of the stream is performed based on a specific PID attached to the TS packet to indicate that it belongs to the stream.

  The control unit 13 can be configured by a microprocessor including a CPU, and generates a country-specific channel list and selects a channel according to the country-specific channel list based on a signal from the remote controller 16. The country-specific channel list generation processing includes physical channel search using the tuner 11 and acquisition of physical channel information, logical channel information, and original network ID using the TS demultiplexer 12. The channel tuning process includes channel selection control of the physical channel using the tuner 11 and further channel selection control of the logical channel using the TS demultiplexer 12.

  The storage unit 14 can be configured by a storage medium such as a ROM, a RAM, or a flash memory. As shown in FIG. 2, the storage medium stores in advance a country identification information list L1 in which a country and country identification information, that is, an original network ID are associated with each other. The country identification information list L1 is used to select a country channel list when the country is set by the user after the country channel list is created for each country identification information.

  The remote controller 16 includes a search instruction key 16a for instructing the controller 13 to search for a channel, a country setting key 16b (setting means) for setting a country in which the user wants to view digital television broadcasting, and a channel key 16c. Channel up / down keys 16d and 16e for selecting channels in ascending or descending order.

  FIG. 3 shows the flow of the country-specific channel list creation process in the control unit 13. First, when the search instruction key 16a is operated by the user, a signal based on the operation is transmitted from the remote controller 16, and the control unit 13 receives the signal via the wireless reception unit 17 and uses it as a trigger for the tuner 11. The physical channel search is started using (S101).

  Whenever the physical channel is detected, the control unit 13 extracts the TS packet including the NIT from the TS of the broadcast signal of the physical channel, and acquires the physical channel information, the original network ID, that is, the country identification information and the logical channel information from the NIT. (S102 to 104), these are stored in the storage unit 14 in association with each other. The processing from S101 to S104 is executed over the entire frequency band that can be received by the tuner 11 (No in S105).

  When the channel search over the entire area is completed (Yes in S105), as shown in FIG. 4, a channel list L2 in which a physical channel number, an original network ID assigned to each country, and a logical channel number are associated with each other. Is stored in the storage unit 14. In the figure, as an example, a channel list L2 in the case where the receiving device 1 is in a position where it can receive broadcast signals from France and Italy is illustrated. The channel list L2 preferably includes the broadcast station name as shown in the figure. Broadcast station name information can be obtained from the NIT as described above.

  After completion of the channel search, the country-specific channel list L3 shown in FIG. 5 is created based on the channel list L2 (S106). The country-specific channel list L3 is formed by listing the logical channel numbers associated with the original network ID for each original network ID. In the figure, as an example, country-specific channel lists L31 and L32 in France and Italy are shown. As shown in the figure, it is preferable that the country-specific channel list L3 further includes a broadcasting station name in association with the logical channel number.

  After the country-specific channel list L3 is created, when the user operates the country setting key 16b of the remote control 16 to select a country, the control unit 13 displays the original network ID of the selected country in the country identification information list L1. Refer to and acquire the country-specific channel list L3 of the original network ID. When the user selects a channel, the country-specific channel list L3 is referred to, and the logical channel in the country-specific channel list L3 is selected based on the operation of the channel key 16c or the channel up / down keys 16d, 16e. The video signal of the selected logical channel is output to the monitor device 3.

  In the present embodiment, a tuner 11 receives a broadcast signal compliant with the DVB-T standard and searches for its physical channel, and a TS demultiplexer 12 logically converts the broadcast signal of the found physical channel to the above-described physical channel. A transport stream superimposed as a channel is acquired. In the above standard, the logical channel corresponds to the broadcast channel of the broadcast station. Therefore, it is possible to select a broadcast channel for a broadcast signal that complies with the above-mentioned standard.

  In addition, the control unit 13 acquires country identification information from the broadcast signal using the TS demultiplexer 12, and creates a country-specific channel list L3 in which physical channel information and logical channel information, that is, broadcast channel information are associated with each country identification information. To do. Therefore, by selecting this country-specific channel list, even in a region where the broadcast signals from a plurality of countries can be received, only the broadcast channel in the country that the user wants to view is selected from the selected country-specific channel list L3. Channel selection is possible based on this. Therefore, it becomes difficult to select a broadcast channel in a country where viewing is not desired, and the troublesomeness at the time of viewing can be eliminated.

(Second Embodiment)
Since the main members of the receiving apparatus according to the second embodiment of the present invention have the same configuration as that of the first embodiment, the main configuration of the receiving apparatus of this embodiment will be described with reference to FIG. . The control unit 13 of the receiving device 1 of this embodiment does not create the country-specific channel list L3 according to the first embodiment, and selects the ascending order or descending order of logical channels based on the operation of the channel up / down keys 16d and 16e. At the time of broadcasting, the above-mentioned channel list L2 is referred to, a logical channel in a country set by the user is selected, and a logical channel in a country different from the set country is skipped (tuning means).

  FIG. 6 shows a flow of logical channel tuning processing by the control unit 13 of this embodiment. First, the control unit 13 receives the signal transmitted from the remote controller 16 based on the operation of the country setting key 16b by the user, thereby detecting the setting of the country in which the user desires to view the television (S201). The subsequent processing from S202 to S205 is the same as the processing from S101 to S104 shown in FIG.

  The control unit 13 detects the operation of the channel up / down keys 16d, 16e based on a signal from the remote controller 16 according to the operation of the channel up / down keys 16d, 16e by the user. While the control unit 13 does not receive the above signal (No in S206), the control unit 13 is in a standby state, and when the operation of the channel up / down keys 16d and 16e is detected (Yes in S206), the control unit 13 sets the user in S201. It is determined whether the country of the selected channel matches the country of the logical channel to be selected next. Specifically, first, country identification information set based on the operation of the country setting key 16b is acquired by referring to the country identification information list L1. Then, it is determined whether the acquired country identification information matches the country identification information of the logical channel scheduled to be selected next. If they match (Yes in S207), the control unit 13 selects a channel to be selected next (S208), and outputs a video signal or the like to the monitor device 3 (S209). If they do not match (No in S207), the channel to be selected next is skipped (S210).

  In the above processing, for example, when the channel list L2 shown in FIG. 7 is stored in the storage unit 14 and France is set as the country in which the user wants to watch TV, the channel up / down keys 16d and 16e are displayed. When selecting a channel using, the first, second, and fourteenth logical channels indicated by the italics can be selected. As a result, as shown in FIG. 8, when the channel up key 16d is operated in the state where the second channel is selected, the third logical channel is skipped, and the video or the like is displayed on the monitor device 3. Instead, the video of the fourth logical channel is displayed on the monitor device 3. For the sake of explanation, FIG. 7 described above rearranges the contents of FIG. 2 described above in ascending / descending order of logical channel numbers.

  In the present embodiment, as in the first embodiment, it is possible to obtain the effect of enabling broadcast channel tuning of broadcast signals compliant with the DVB-T standard. In addition, when selecting a logical channel based on the operation of the channel up / down keys 16d and 16e, the logical channel of the country set by the country setting key 16b is selected, and the logical channels of countries other than that country are skipped. Even in an area where the broadcast signals from a plurality of countries can be received, it is possible to select only the channel of the country that the user wants to watch. Therefore, it becomes difficult to select a broadcast channel in a country where viewing is not desired, and the troublesomeness at the time of viewing can be eliminated.

  In addition, this invention is not limited to the structure of the said 1st and 2nd embodiment, A various deformation | transformation is possible according to the intended purpose.

1 is a configuration diagram of a digital television broadcast signal receiving apparatus according to a first embodiment of the present invention. The figure which shows the country identification information list previously stored in the memory | storage part of the said apparatus. The flowchart of the channel list preparation process according to country in the control part of the said apparatus. The figure which shows the channel list stored in the memory | storage part of the said apparatus. (A) is a figure which shows an example of the country channel list produced by the control part of the said apparatus, (b) is a figure which shows the example of the country channel list different from the above. The flowchart of the channel selection process in the control part of the digital television broadcast signal receiver which concerns on the 2nd Embodiment of this invention. The figure for demonstrating the order of the logical channel selected in the said channel selection process. The figure for demonstrating the effect | action by the said channel selection process.

Explanation of symbols

1 Digital TV Broadcast Signal Receiver 11 Tuner (Channel Search Means)
12 TS multiplexer (stream acquisition means)
13 Control unit (information acquisition means, list creation means, channel selection means)
14 Storage unit (storage means)
16 Remote control 16b Country setting key (setting means)
16d channel up key 16e channel down key

Claims (3)

Channel search means for receiving a terrestrial digital television broadcast signal (hereinafter referred to as a broadcast signal) compliant with DVB-T (Digital Video Broadcasting-Terrestrial) standard and searching for a physical channel of the broadcast signal;
In a digital television broadcast signal receiving apparatus comprising a stream acquisition means for acquiring a transport stream superimposed as a logical channel on a broadcast signal of a physical channel found by the channel search means,
Information acquisition means for acquiring country identification information assigned to each physical channel and indicating the country of transmission of the broadcast signal from the broadcast signal of the physical channel found by the channel search means;
Country identification information acquired by the information acquisition means, physical channel information indicating the physical channel found by the channel search means, and logic indicating a logical channel corresponding to the transport stream acquired by the stream acquisition means Storage means for associating and storing channel information;
For each country identification information, a country channel list in which the physical channel information and the logical channel information are associated with each other is created with reference to the storage means, and list creation means for storing the list in the storage means is further provided. A digital television broadcast signal receiver characterized by the above. Channel search means for receiving a terrestrial digital television broadcast signal (hereinafter referred to as a broadcast signal) compliant with DVB-T (Digital Video Broadcasting-Terrestrial) standard and searching for a physical channel of the broadcast signal;
In a digital television broadcast signal receiving apparatus comprising a stream acquisition means for acquiring a transport stream superimposed as a logical channel on a broadcast signal of a physical channel found by the channel search means,
Information acquisition means for acquiring country identification information assigned to each physical channel and indicating the country of transmission of the broadcast signal from the broadcast signal of the physical channel found by the channel search means;
Country identification information acquired by the information acquisition means, physical channel information indicating the physical channel found by the channel search means, and logic indicating a logical channel corresponding to the transport stream acquired by the stream acquisition means Storage means for associating and storing channel information;
A setting means for setting a country in which the user wants to watch digital TV broadcasting;
A channel up / down key for selecting the logical channel in ascending or descending order; and
Based on the operation of the channel up / down key, further comprising channel selection means for selecting a logical channel with reference to the storage unit,
The storage means stores in advance a country identification information list that associates the country set by the setting means with the country identification information,
The channel selection means acquires country identification information set by the setting means with reference to the country identification information list, and the acquired country identification information and the country of the logical channel scheduled to be selected next. A digital television broadcast signal receiving apparatus characterized in that if the identification information matches, the logical channel is selected, and if they do not match, the logical channel is skipped.   3. The digital television broadcast signal receiver according to claim 1, wherein the country identification information is an original network ID in a network information table (NIT) included in a transport stream packet of the broadcast signal. .

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