JP2009033774A - Electronic device and acquisition method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of speedily acquiring a section of program specific information/service information (PSI/SI). <P>SOLUTION: A terrestrial digital television broadcast receiver includes two systems of tuners, OFDM decoders and TS processors. A control device 13 controls a first digital broadcast tuner 10a and a second digital broadcast tuner 10b to select a frequency, respectively different, relating to a radio wave transmitted from a desired broadcast station and relating to radio waves transmitted from a desired broadcast station group. Furthermore, when the first digital broadcast tuner 10a is being used for program viewing or the like, the second digital broadcast tuner 10b is controlled to select the frequency relating to the radio waves transmitted from the desired broadcast station group. After the desired frequency is selected by the tuner, a transport stream (TS) is generated by the OFDM decoder, and the section of PSI/SI is acquired from the generated TS by the TS processor. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to digital broadcasting, and more particularly to a receiver in terrestrial digital broadcasting.

  In recent years, digital broadcasting such as BS (Broadcasting Satellite) digital broadcasting and broadband CS (Communication Satellite) digital broadcasting has been performed. In BS digital broadcasting and broadband CS digital broadcasting, radio waves are transmitted from a satellite, so that the same broadcast content can be received in Japan. In addition, the frequency for selecting a broadcasting station is determined by predetermining the satellite used for broadcasting.

  Further, after collecting the program arrangement information of each broadcasting station at the center once and collecting the channel information and program information of these broadcasting stations, the all-station SI (Service) which transmits the collected information to each broadcasting station again. Since a system called “Information” has been introduced, it is possible to receive the summarized information regardless of the radio wave transmitted from any broadcasting station. Therefore, if a radio wave transmitted from a certain broadcasting station is received for a certain period of time, it is possible to receive program information necessary for EPG (Electronic Program Guide) display and the like.

  As an invention for acquiring program information as described above, an invention related to a digital communication system capable of quickly acquiring long-term program information has been made (see Patent Document 1).

Now, since the terrestrial digital broadcasting scheduled to start broadcasting in 2003 is a terrestrial broadcasting system, the broadcasting station in charge of broadcasting differs depending on the region. For this reason, when a receiver is installed, an operation called initial scan is required to receive radio waves transmitted from all broadcasting stations and to check the frequency of these radio waves. Also, when a broadcasting station is newly opened, as a means for enabling reception of radio waves transmitted from this broadcasting station, radio waves transmitted from all broadcasting stations are received and the frequency of these radio waves is examined. Therefore, an operation called rescanning is required to update the frequency information of receivable radio waves.
JP 2000-13756 A (page 6, FIG. 3)

  However, when performing the initial scan or rescan, or when newly acquiring program information that has not been stored, it is necessary to acquire a PSI / SI section by receiving radio waves transmitted from the respective broadcast stations. Yes, and it took a very long time.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an electronic apparatus that can quickly acquire a PSI / SI section.

  In order to achieve the above object, in the invention according to claim 1, from the first receiving means for receiving the first radio wave related to digital terrestrial broadcasting, and the first radio wave received by the first receiving means. A first acquisition means for acquiring information relating to the first network and first program information, and a second frequency related to terrestrial digital broadcasting, which is different from the frequency of the first radio wave received by the first reception means. Second receiving means for receiving radio waves; second acquisition means for acquiring information relating to a second network and second program information from the second radio waves received by the second receiving means; Storage means for storing information on the first network and the first program information acquired by one acquisition means, information on the second network acquired by the second acquisition means, and second program information; Control means for controlling to display information on a plurality of networks stored in the storage means and an electronic program guide based on the program information.

  According to a third aspect of the present invention, a first radio wave related to terrestrial digital broadcasting is received, information about a first network and first program information are acquired from the received first radio wave, and the reception And receiving a second radio wave related to terrestrial digital broadcasting, obtaining information relating to a second network and second program information from the received second radio wave, Information on one network, first program information, information on the second network, and second program information are stored, and an electronic program guide based on the stored information and program information on the plurality of networks is displayed. It is characterized by controlling as follows.

  According to the present invention, a PSI / SI section can be acquired quickly.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a hardware block diagram of a first terrestrial digital television broadcast receiver.
The control device 13 receives a channel selection command from an input device 14 such as an input button or a remote controller provided on the receiver body. The antenna 2 captures radio waves transmitted from the transmission device as terrestrial waves.

  The first digital broadcast tuner 10a and the second digital broadcast tuner 10b are tuners compatible with terrestrial digital television broadcasting. These tuners select a frequency of a radio wave transmitted from a desired broadcast station based on a channel selection command received by the control device 13.

  A first OFDM (Orthogonal Frequency Division Multiplexing) decoder 11a and a second OFDM decoder 11b generate a transport stream by decoding a radio wave related to the frequency selected by the tuner and captured by the antenna 2.

  The first TS (Transport Stream) processing device 12a and the second TS processing device 12b perform PSI (Program Specific Information) / SI (Service Information) section extraction related to program information acquisition, and packetized video. And ES (Elementary Stream) composed of audio data.

  As PSI / SI sections, for example, there are the following sections. As one of the sections constituting the PSI, there is a network information table (NIT) in which information on a broadcasting station (network) related to a radio wave being received is described. By sequentially acquiring the NIT of each broadcasting station, initial scanning and rescanning are performed. Further, as one of the sections constituting the SI, there is an EIT (Event Information Table) in which information related to a program such as a program name and broadcast date and time is described. By sequentially obtaining the EIT of each broadcasting station, program information of each broadcasting station is obtained.

  The PSI / SI sections extracted by the first TS processing device 12a and the second TS processing device 12b are stored in the storage device 15. The selected ES is transmitted to the MPEG decoder 16.

  The control device 13 controls the OSD (On Screen Display) device 18 to display EPG (Electric Program Guide) or the like on the display device 19 based on the EIT that is a section of SI stored in the storage device 15. The MPEG decoder 16 decodes the ES, and the video and audio signals generated as a result are reproduced by the display device 19 and the speaker 17.

  As shown in FIG. 1, a receiver for terrestrial digital television broadcasting is provided with two systems of a tuner, an OFDM decoder, and a TS processing device (hereinafter referred to as a tuner group). In order to receive radio waves transmitted from two desired broadcast stations, the control device 13 includes two tuners, a first digital broadcast tuner 10a and a second digital broadcast tuner 10b, and a first TS processing device. The two TS processing devices 12a and the second TS processing device 12b are controlled. These two tuner groups can be used for processing other than program viewing.

FIG. 2 is a flowchart for explaining an embodiment using the first receiver described with reference to FIG.
The first embodiment will be described below with reference to the flowchart. When the viewer is not viewing the program (step S1 no), the first digital broadcast tuner 10a selects a frequency related to the radio wave transmitted from the desired broadcast station (step S2). The OFDM decoder 11a decodes the radio wave related to the selected frequency, thereby generating a transport stream. Furthermore, the TS processing device 12a acquires NIT and EIT from the generated transport stream. An initial scan or rescan is performed based on NIT, and program information is acquired based on EIT.

  The control device 13 controls the second digital broadcast tuner 10b to select a frequency of a radio wave transmitted from a desired broadcast station other than the broadcast station related to the frequency selected by the first digital broadcast tuner 10a. (Step S3). Based on the radio wave related to the frequency selected by the second digital broadcasting tuner 10b, the NIT and EIT are acquired in the same manner as described above, and the initial scan or rescan is performed based on the NIT. Get program information.

  When the frequency of a radio wave transmitted from a desired broadcast station group is selected using the first digital broadcast tuner 10a and the second digital broadcast tuner 10b, and processing such as rescanning is completed (step S4) yes), the selection control of the frequency of the radio wave transmitted from the desired broadcast station group by the control device 13 ends.

  If all the frequencies of radio waves transmitted from the desired broadcast station group have not been selected (step S4 no), the control device 13 determines that the first digital broadcast tuner 10a and the second digital broadcast tuner 10b are desired. Selects unselected frequencies from among the radio wave frequencies transmitted from the broadcast station, and uses two tuners to control the frequency of the radio waves transmitted from all broadcast stations to be selected .

  In this way, processing such as rescanning is performed using two tuner groups, so that processing such as rescanning can be performed more quickly than when processing using one tuner group. It becomes possible to do.

  The configuration of the first terrestrial digital television broadcasting receiver described with reference to FIG. 1 is equipped with two terrestrial digital broadcasting tuner groups, but three systems, four systems, etc. By increasing the number of terrestrial digital broadcast tuner groups equipped, it becomes possible to perform processing such as rescanning more rapidly than the effect of the embodiment described in the first embodiment.

  When the viewer is watching the program (step S1 yes), one of the two tuner groups is used for the viewer to watch the program. Therefore, the control unit 13 selects a frequency of a radio wave transmitted from a desired broadcasting station using a tuner group of one system that is not used while the viewer is watching the program, and is described above. The NIT and EIT are acquired in the same manner as described above, rescanning is performed based on the NIT, and program information is acquired based on the EIT (step S5).

  While the viewer is watching the program, the frequency of the radio wave transmitted from the desired broadcasting station group is selected using one unused tuner group, and processing such as rescanning is completed. In the case (step S6 yes), the selection control of the frequency of the radio wave transmitted from the desired broadcast station group by the control device 13 ends.

  If all the frequencies of radio waves transmitted from the desired broadcast station group have not been selected (step S6 no), the control unit 13 determines that all the tuner groups of one system that are not used for program viewing should be selected. Control to select the frequency of the radio wave transmitted from the broadcast station.

  As described above, processing such as rescanning is performed by using a tuner group that is not used for viewing a program, so that the viewer can watch the program and simultaneously perform rescanning or program information acquisition. Can be performed. When re-scanning is performed using a tuner group that is not used, the latest channel selection information can always be acquired. Further, if program information acquisition processing is performed using a tuner group that is not used, program information related to a program that is not viewed can be acquired.

FIG. 3 is a hardware block diagram of the second terrestrial digital television broadcast receiver.
The control device 23 receives a channel selection command from an input device 24 such as an input button or a remote controller provided in the receiver body. The antenna 2 captures radio waves transmitted from the transmission device as terrestrial waves.

  The terrestrial digital broadcast tuner 20a selects the frequency of radio waves related to terrestrial digital television broadcast. The terrestrial analog broadcast tuner 20b selects a frequency of radio waves related to terrestrial analog television broadcast. These tuners select a frequency of a radio wave transmitted from a desired broadcast station based on a channel selection command received by the control device 23.

The demodulator 21b demodulates the radio wave related to the frequency selected by the terrestrial analog broadcast tuner 20b and captured by the antenna 2.
The functions of the respective configurations of the OFDM decoder 21a, TS processing device 22, storage device 25, MPEG decoder 26, speaker 27, OSD device 28, and display device 29 are the same as those described with reference to FIG.

FIG. 4 is a flowchart for explaining a second embodiment using the second receiver described with reference to FIG.
A second embodiment will be described. When the viewer is watching a program related to terrestrial analog television broadcasting (step S7 yes), the terrestrial digital broadcast tuner 20a is not used.

  Therefore, the control device 23 selects a frequency of a radio wave transmitted from a desired broadcast station by the unused terrestrial digital broadcast tuner 20a while the viewer is watching a program related to analog television broadcasting. Control is performed as follows (step S8). The OFDM decoder 21a decodes the radio wave related to the selected frequency to generate a transport stream, and the TS processing device 22 acquires NIT and EIT from the generated transport stream. An initial scan or rescan is performed based on NIT, and program information is acquired based on EIT.

  When the frequency of radio waves transmitted from a desired broadcast station group is selected using the digital terrestrial broadcast tuner 20a and processing such as rescanning is completed (step S9 yes), the desired broadcast station by the control device 23 is selected. The selection control of the frequency of the radio wave transmitted from the group ends.

  When all the frequencies of radio waves transmitted from the desired broadcast station group have not been selected (step S9 no), the control unit 23 transmits the terrestrial digital broadcast tuner 20a from all broadcast stations to be selected. The frequency of the radio wave is sequentially selected, and control is performed so that rescanning or program information acquisition is performed based on the radio wave associated with each selected frequency.

  By using a digital terrestrial broadcast tuner that is not used for program viewing as described above, the viewer can watch programs related to analog terrestrial television broadcasts, etc. by processing the processing content such as rescan processing. However, processing such as rescanning or program information acquisition can be performed at the same time.

  When the rescan process is performed using a tuner group related to digital broadcasting that is not used, it is possible to always obtain the latest channel selection information. If program information acquisition processing is performed using a tuner group that is not used, it is possible to acquire program information related to a program related to terrestrial digital television broadcasting that is not viewed.

  In the embodiment described above, the terrestrial digital broadcast tuner 20a and the terrestrial analog broadcast tuner 20b have been described. However, in addition to the terrestrial analog broadcast tuner 20b, the BS digital broadcast tuner and the broadband A CS digital broadcast tuner or the like may be mounted.

  Further, the configuration of the second terrestrial digital television broadcast receiver described with reference to FIG. 3 is equipped with a single terrestrial digital broadcast tuner group, but two systems, three systems, etc. By increasing the number of terrestrial digital broadcast tuner groups equipped, it becomes possible to perform processing such as rescanning more quickly than the effect of the embodiment described in the second embodiment.

FIG. 5 is a flowchart for explaining a third embodiment using the second receiver described with reference to FIG.
A third embodiment will be described. The control device 23 performs the control described below. The terrestrial analog broadcast tuner 20b sequentially receives the carrier signals (step S10). The frequency value relating to the received carrier signal is stored in the storage device 25. The terrestrial digital broadcast tuner 20a selects a frequency based on the frequency value stored in the storage device 25 (step S12). The OFDM recorder 21a and the TS processing device 22 perform rescanning or program information acquisition based on the selected frequency and on the radio wave related to terrestrial digital broadcasting.

  The terrestrial digital broadcast tuner 20a selects a frequency of a radio wave stored in the storage device 25 and transmitted from a desired broadcasting station group, and completes processing such as rescanning (step S13 yes). The control by the device 13 ends.

  When all the frequencies of radio waves transmitted from the desired broadcast station group have not been selected (step S13 no), the control unit 23 stores the terrestrial digital broadcast tuner 20a in the storage device 25 and the desired broadcast station. The frequency of the radio wave transmitted from the group is selected, and control is performed so that the OFDM recorder 21a and the TS processing device 22 perform processing such as rescan based on the radio wave related to the selected frequency.

  By receiving a carrier signal in advance using the analog terrestrial broadcast tuner 20b, the terrestrial digital broadcast tuner 20a does not need to select a frequency related to a carrier signal that is not received, and is compared with a case where all carrier signals are received. Thus, initial scanning, rescanning, or program information acquisition can be performed in a short time.

  The present invention is not limited to the above embodiment as long as it does not depart from the gist of the present invention. And it can apply widely to the apparatus for digital broadcasting which acquires the section of PSI / SI.

The hardware block diagram of the 1st terrestrial digital television broadcast receiver. The flowchart explaining the 1st Example which uses the 1st receiver demonstrated using FIG. The hardware block diagram of the 2nd terrestrial digital television broadcast receiver. The flowchart explaining the 2nd Example which uses the 2nd receiver demonstrated using FIG. The flowchart explaining the 3rd Example using the 2nd receiver demonstrated using FIG.

Explanation of symbols

2 ... UHF antenna, 10a ... first tuner, 10b ... second tuner,
11a ... first OFDM decoder, 11b ... second OFDM decoder,
12a ... 1st TS processing device, 12b ... 2nd TS processing device,
13, 23 ... control device, 14, 24 ... input device, 15, 25 ... storage device,
16, 26 ... MPEG decoder, 17, 27 ... speaker,
18, 28 ... OSD device, 19, 29 ... display device,
20a: Digital terrestrial broadcast tuner,
20b ... Terrestrial analog broadcast tuner,
21a ... OFDM decoder, 21b ... demodulator, 22 ... TS processor,

Claims (4)

First receiving means for receiving a first radio wave related to terrestrial digital broadcasting;
First acquisition means for acquiring information about the first network and first program information from the first radio wave received by the first reception means;
Second receiving means for receiving a second radio wave according to terrestrial digital broadcasting, which is different from the frequency of the first radio wave received by the first receiving means;
Second acquisition means for acquiring information relating to a second network and second program information from the second radio wave received by the second reception means;
Storage means for storing information on the first network and the first program information acquired by the first acquisition means, and information and second program information on the second network acquired by the second acquisition means; ,
Control means for controlling to display information on a plurality of networks stored in the storage means and an electronic program guide based on the program information;
An electronic device comprising: The first receiving means and the second receiving means are each not selected, and sequentially receive the frequency of radio waves related to terrestrial digital broadcasting, and the first acquiring means and the second acquiring means The network information and the program information are sequentially acquired from the radio waves received by the receiving means corresponding to each, and the storage means acquires the network information and the program information acquired by the first acquisition means and the second acquisition means. Control means for controlling to store sequentially,
The electronic apparatus according to claim 1, further comprising: Receives the first radio wave related to terrestrial digital broadcasting,
Obtaining information about the first network and first program information from the received first radio wave;
The second radio wave that is different from the frequency of the received first radio wave and is related to terrestrial digital broadcasting is received,
Obtaining information about the second network and second program information from the received second radio wave;
Storing information about the first network and first program information, information about the second network and second program information,
Controlling to display an electronic program guide based on the information about the plurality of stored networks and program information;
The program information acquisition method characterized by the above-mentioned. Unselected, sequentially receiving the frequency of radio waves related to terrestrial digital broadcasting, sequentially acquiring network information and program information from the received radio waves, and sequentially storing the acquired network information and program information Control,
The program information acquisition method according to claim 3.

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