JP2007295225A - Digital broadcast receiving apparatus, and digital broadcast receiving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiving apparatus through which viewers can obtain useful information by viewing a commercial program in digital broadcasting and a program provider can surely make the viewers view the commercial program. <P>SOLUTION: Information for providing merits especially by viewing a commercial program is added to a transport stream signal 30 in the digital broadcasting from a broadcasting means as download data 103 and broadcasted, the broadcasted information is extracted by using a common interface 29 for extracting the TS signal 30 to the outside of a broadcasting receiving apparatus in order to perform limited reception of a charged broadcast program in Europe or the like and the information useful for viewers can be obtained by the download data 103 of the commercial program. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a digital broadcast receiving apparatus and a digital broadcast receiving method, and more particularly to receiving useful information for viewers by receiving, storing, and reproducing download data associated with a commercial program when receiving a digital broadcast. It relates to digital broadcast reception that can be obtained.

In recent years, video information, audio information, and text information have been digitized, and broadcast stations that broadcast as digital broadcasts have appeared. In such a digital broadcast station, the content of the program viewed by the viewer and the control information for controlling the program are broadcast from the broadcast station, and the broadcast program is received by the viewer by the digital broadcast receiving device. It is possible to record on a recording medium using a DVCR (digital VTR), HDD (hard disk drive), or the like. On the other hand, a broadcasting station that provides a program receives a compensation from a manufacturer or a seller that provides the product to be advertised by providing the viewer with a commercial program that promotes a predetermined product and promoting the product. Yes. As a result, the viewer can view the program broadcast free of charge by viewing the commercial program (see Patent Document 1).
JP 2002-335464 A

  However, when the commercial program is started, the viewer may go to the toilet or switch to another program by switching the channel and may not view the program. Also, when a program is recorded on a recording device, the commercial program part is often cut and edited, and it has become difficult to reliably convey the advertisement of the product to the viewer on the commercial program. . In the conventional method, both the video signal and the audio signal are MPEG-2 streams different from the commercial program, and are easily distinguishable. In many cases, only the commercial program portion is removed. In addition, with the prior art, even if you watch a commercial program, you can only get information on the products of the companies that provide it. There were few.

  Accordingly, the present invention has been made to solve the above-described problems, and viewers can obtain useful information by viewing commercial programs in digital broadcasting, whereby program providers can view viewers. It is an object of the present invention to provide a digital broadcast receiving apparatus and a digital broadcast receiving method capable of reliably viewing commercial programs.

  The present invention is a digital broadcast receiving apparatus for receiving a digital broadcast commercial program, which has video information, audio information, character information, and control information for combining these information, and includes a commercial program. When receiving a digital broadcast that broadcasts the stream signal by adding information useful to the viewer as download data by viewing the commercial program, the information useful for the broadcast viewer is limited to the pay broadcast. A common interface for extracting a transport stream signal to the outside of the apparatus for reception is provided, and an information source decoding unit that provides useful information to viewers by download data of a commercial program is provided.

  According to the present invention, the information source decoding unit includes a card having a memory for storing information useful for the viewer through the common interface, and information useful for the viewer through the common interface. And a computer for extracting information useful to the viewer stored in the memory.

  The present invention is a digital broadcast receiving method for receiving a digital broadcast commercial program, comprising video information, audio information, character information, and control information for combining these information, and including a commercial program. When a broadcast is received by adding information useful for the viewer as download data by viewing the commercial program to the port stream signal, the information useful for the broadcast viewer is received for limited reception of pay broadcasting. Therefore, it is characterized in that useful information is given to the viewer by taking out the transport stream signal to the outside of the apparatus through a common interface and using the download data of the commercial program.

  Furthermore, the present invention provides a digital broadcast receiving method for accumulating information useful for the viewer in a memory of a card through the common interface and retrieving the information useful for the viewer stored in the memory in accordance with a command from a computer. It is.

  According to the digital broadcast receiver of the present invention, the viewer can obtain useful information by viewing the commercial program in the digital broadcast, thereby allowing the program provider to surely view the commercial program. I can do it.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a basic configuration in a preferred embodiment of the digital broadcast receiving apparatus of the present invention. In the case of receiving satellite broadcast (BS / CS digital broadcast) in the digital broadcast receiver of FIG. 1, the satellite broadcast is received by the satellite broadcast antenna 1, frequency converted by the converter circuit 2, and then the decoder circuit. An RF signal is input to 3. In general, the satellite broadcast antenna 1 and the converter 2 are integrated.

  When receiving the terrestrial digital broadcast in the digital broadcast receiving apparatus of FIG. 1, the terrestrial digital broadcast is received by the terrestrial receiving antenna 5, and an RF signal is input to the decoder circuit 3 through the RF cable. The decoder circuit 3 sends data to an HDTV (high-definition television), an SDTV (ordinary television) 4, a DVCR (digital VTR), an HDD (hard disk drive), a personal computer (personal computer), a game machine 6, and the like.

  FIG. 2 shows a basic configuration of the decoder circuit 3 of FIG. In FIG. 2, in the case of satellite digital broadcast from the satellite broadcast antenna 1, the satellite digital broadcast RF signal input from the converter circuit 2 performs channel detection and quadrature detection of the channel selected by the tuner unit 10. Then, the demodulation / decoding circuit 11 performs 8PSK demodulation / decoding on the signal from the tuner unit 10, and the TMCC decoding circuit 12 extracts the TMCC unit from the signal from the tuner unit 10, and performs system identification, transmission parameter switching, and emergency warning. Decode data such as broadcast activation flag. The deinterleave circuit 13 performs frame separation and descrambling. The next Reed-Solomon decoding circuit 14 corrects the error that has occurred in the transmission path and returns it to a transport stream signal (hereinafter referred to as TS signal) 30 that does not have the same error as that transmitted from the broadcasting station. After the TS reproduction circuit 19, the information source decoding unit 50 decodes the TS signal 30.

  On the other hand, in the case of terrestrial digital broadcasting from the terrestrial receiving antenna 5 in FIG. 2, tuning and detection are performed by the tuner unit 15 as in the case of satellite digital broadcasting, and the demodulation / decoding circuit 16 performs terrestrial digital broadcasting. It demodulates and decodes the signals modulated to 64QAM and 16QAM, which are transmission path coding methods. Further, the TMCC decoding circuit 17 performs TMCC decoding from the signal from the tuner unit 15 and extracts the TMCC unit. Further, the deinterleave circuit 18 performs hierarchical processing, energy despreading, and the like. Then, the TS reproduction circuit 19 decodes the TS signal 30. After the TS reproduction circuit 19, the information source decoding unit 50 decodes the TS signal 30.

  The information source decoding unit 50 in FIG. 2 has the following configuration. In the CA descrambling circuit 20 shown in FIG. 2, the CA descrambling code applied for receiving pay broadcasting or RMP (copyright protection) broadcasting is decrypted. In general, in Japan, when pay broadcast is received, a CA module 27 such as a BCAS card 56 (IC card) is inserted into the CA scramble circuit 20 for limited reception (pay broadcast reception). Only viewers with a contract can receive the broadcast.

  On the other hand, in Europe, the PCMCIA card 57 is inserted through the common interface 29 into the CA module 27 of FIG. In the case of domestic use, in the BCAS card 56, only the related information for limited reception (the key for decrypting the encryption applied for charging) is exchanged with the CA descrambling circuit 20, but the PCMCIA card 57 In this case, not only the related information but also the TS signal 30 itself is exchanged with the CA module 27 through the common interface 29.

  The decrypted TS signal 30 shown in FIG. 2 is converted into video information, audio information, text, etc. by MPEG-2 DEMUX circuit 21 using SI (Service Information: Program Sequence Information) / PSI (Program Specific Information: Transmission Control Information). Each component signal of video information, audio information, and character information is separated into each component signal of information, and is sent to each decoder of the video signal decoder circuit 23, the audio signal decoder circuit 25, and the EPG / basic data decoder circuit 22, respectively. Sent.

  2 performs MPEG-2 video decoding, and the audio signal decoder circuit 25 performs AAC decoding. Then, the EPG basic data decoder circuit 22 performs BML decoding and decodes into an EPG (Electric Program Guide) or the like.

  FIG. 3 is a diagram for explaining separation of stream signals by PSI (transmission control information, transmission control information, program arrangement information) 100. The PSI 100 is information for acquiring the video / audio / characters constituting the program selected by the viewer from the TS signal 30, and the TS signal 30 is obtained from the SI (program arrangement information) as shown in FIG. Are divided into content 101 such as video information and audio information, EPG 102 which is an electronic program guide or program information, download data 103 which is also used in the present invention, and the like.

  In this way, the data decoded into the baseband signal of video information and audio information by SI (program sequence information) is output to the monitors of HDTV 4 and SDTV 4 in FIG.

  In addition to this, there is a high-speed digital input / output interface that outputs the received signal shown in FIG. 1 to a recording device such as an external DVCR 6, personal computer 6, or HDD 6 as digital data. Further, as shown in FIG. 2, the modem 26 and the remote controller light receiving unit 28 for bidirectionally communicating the viewing history data of the pay broadcast program and the like with the broadcasting station via the public telephone line 32 are included in the decoder circuit 3. Part of.

  Next, a signal structure in digital broadcasting will be described. The signal structure in digital broadcasting is converted as follows. As described above, the digital broadcast shown in FIG. 1 is received by the digital broadcast receiver 7 and a TS signal 30 is generated as shown in FIG. The TS signal 30 has a multiple signal format conforming to the TS signal 30 defined by MPEG-2 Systems as shown in FIG. 4, and this TS signal 30 has a fixed length including program information of various channels. The TS packet 33 is a continuous signal sequence. Therefore, in the tuners 10 and 15 of FIG. 2, the TS signal 31 including the program of the necessary channel and the TS signal 32 of the program of the other channel are selected from the TS signal 30 and a relatively short fixed length. The TS packet 33 is extracted.

  A header 34 is added to the head of the extracted TS packet 33, and the TS packet 33 and the header 34 are 188 bytes in total. At this time, the first 4 bytes are the header 34, and the remaining 184 bytes are an adaptation field, which is a variable-length extension header, and a payload for transmitting program contents.

  A PES packet 35 formed by collecting payloads of TS packets 33 having the structure shown in FIG. 4 has a variable-length signal structure, and is mainly used to transmit stream signals such as video information and audio information.

  As illustrated in FIG. 5, an MPEG-2 TS signal 30 includes, in addition to streams such as video information and audio information of a program included in the TS signal 30, ES (elements) constituting the program. The information of the table 44 showing the relationship with program elements such as (mentary stream) 42 is included. In digital broadcasting, the MPEG-2 table 44 is used as control information for composing a program. The table 44 is data called a section 43 in the stream of the PES packet 41. That is, video information, audio information, and other ES (video) 42 are generated from the PES packet 41. On the other hand, in the case of the control information table 44 such as PSI (transmission control information) shown in FIG. Therefore, as shown in FIG. 5, PES packet 41 and section 43 are created from ES42 of video information, ES42 of audio information, ES42 consisting of character information, etc., and table 44, and TS packet from PES packet 41 and section 43. 40 is made. 4 is generated from the TS packet 40, and further, the TS signal 30 is combined with the TS signals 30 of several other channels.

  In the case of the section 43, a plurality of sections 43 may be sent in one TS packet 40.

Table 1 shows a baseband signal information format.
The relationship between each information (signal) and format is as shown in Table 1. Information related to contents such as video information, audio information, and caption information is in PES format, and other control information is in section format. is there. This section format has a structure as shown in FIG. 6, and the first 8 bits are table_id 60 to identify various tables (FIG. 6 is an example of the structure of SDT (Service Description Table)).

  Although the maximum value of one section 43 in FIG. 5 is defined as 4096 bytes from the section length, one table 44 in FIG. 5 may be transmitted in multiple sections using the section number (section_number) 68 in FIG. It is possible, and several sections 43 may constitute one table 44. In each table 44 of FIG. 5, detailed information called a descriptor is arranged in the descriptor area 72 of FIG. 6 in the data portion. The table configuration can be flexibly changed by this descriptor.

  The PSI (program arrangement information) 100 shown in FIG. 3 for allocating each piece of program information is a PAT (Program Association Table), PMT (Program Map Table), CAT (Conditional Access Table), and NIT (Network Information) shown in Table 1. Table) and TSDT (TS Description table).

  A PMT (Program Map Table) shown in Table 1 is a table showing the positions of components such as video signals and audio signals that constitute a channel. The PAT (Program Association Table) is a table for associating channels with PMT (Program Map Table), and is information indicating the numbers of all channels included in the TS signal 30 and the corresponding PMT (Program Map Table).

  An NIT (Network Information Table) shown in Table 1 indicates information related to a broadcast transmission path, and indicates physical transmission parameters such as reception frequencies and modulation schemes related to all channels.

  A CAT (Condition Access Table) shown in Table 1 is a packet for transmitting individual information (EMM: Entitlement Management Message) such as contract information for each viewer among information related to a conditional access system used for pay broadcasting or the like. Is specified.

  TSDT (TS Description table) defines a descriptor to be written in the descriptor area 72 supported by the TS signal 30.

  In addition to such control information, there is download data. The function of this download data is required as the digital broadcast receiving device 7 in FIG. 1 has a function similar to a computer, and the digital broadcast receiving device 7 installed in each home. It was conceived to update the software.

  In the embodiment of the receiving apparatus for digital broadcasting of the present invention, the function of this download data is to send useful information to the viewer in accordance with the service system of this download data. The function of this download data is usually for updating the software of the system microcomputer 53 shown in FIG. 2 that controls the digital broadcast receiver 7 shown in FIG. Based on this, the data is stored in the memory 51 in the PCICIA card 57 through the common interface 29.

  In order to download the download data, it is necessary to send the SDTT (software download trigger table) shown in Table 1. However, SDTT (software download trigger table) is not used in the case of download contents transmitted in section format.

The data structure of this SDTT is as shown in Table 2.
Service_id in Table 2 is a label for identifying a service to which download content is transmitted during download.

  “download_level” indicates whether the download is forcibly performed or arbitrarily performed. In the present invention, since it is necessary for the viewer to select when viewing the commercial program, “00” is transmitted (arbitrary download). .

  schedule_time_shift_information (schedule time shift information) is for broadcasting at a different time in order to increase the reception probability. When this value is 0, when the same download content is sent out at the same time on multiple channels Used for. The case of 1 to 12 represents the time when the content to be downloaded the same on a plurality of channels is transmitted with a time shift of 1 to 12 hours for each service_id.

  In the embodiment of the present invention, schedule_time_shift_information (schedule time shift information) is 15, and content to be downloaded is transmitted with a single service_id.

  The start time for distributing download data at start_time (start time) indicates Japan time (JST) and date and time. The duration is indicated by duration.

Table 3 shows the data structure of the download content descriptor.
The download content descriptor shown in Table 3 is stored in descriptor (). In Table 3, it is instructed whether or not it is necessary to restart the receiver at the end of download by reboot. In the present invention, "0" is set and no restart is performed.

  add_on indicates whether the existing module is to be rewritten or added, but “1” indicates additional data.

  Content for download is transmitted in a data carousel or section table. When the download content is a data carousel transmission system, the main body of the download content is transmitted using a DSM (Download Data Block message) of the DSM-CC data carousel. The data format must be determined for each content.

Table 4 shows the data structure of DII.
What is the data information to download? It is described in Module_Info_Byte in a DII (Download InfoIndication Message) message shown in Table 4 of the DSM-CC data carousel.
When data for download is transmitted in a section format, it is transmitted using CDT (Common Data Table).

Table 5 shows the data structure of CDT.
The CDT in Table 5 is for transmitting the data stored in the memory in a section format to all the digital broadcast receiving devices 7 that receive the table.

Table 5 shows the data structure of CDT.
download_data_id (download data identification) is a 16-bit field and specifies data to be downloaded. The download data identification indicates the position by a descriptor or the like according to the content or purpose of the data to be downloaded.

  As described above, with respect to the download data sent from the broadcasting station, the digital broadcast receiving apparatus 7 in FIG. 1 operates the viewer as follows to acquire useful information from the commercial program. With reference to FIG. 7, an example of a procedure for operating the viewer to acquire useful information from a commercial program will be described. FIG. 7 is a flowchart for obtaining download data in a commercial program. FIG. 7 includes steps S1 to S7.

  The remote controller light receiving unit 28 in FIG. 2 receives infrared rays transmitted from the infrared transmission unit 58 of the remote controller 54 having various keys including the numeric keypad 55, and outputs the received signals to the system microcomputer 53. From this output signal, the system microcomputer 53 allows the viewer to know the content selected by the remote controller 54.

  The system microcomputer 53 in FIG. 2 records download data including useful information from the commercial program in the memory 51 in the PCMCIA card 57 through the common interface 29 in the procedure shown in FIG. First, as step S1 in FIG. 7, the digital broadcast receiving device 7 in FIG. 1 starts receiving digital broadcasts.

  Next, in step S2 of FIG. 7, the system microcomputer 53 shown in FIG. 2 determines whether or not the currently received program is a commercial program. If it is a commercial program, the process proceeds to step S3, and if it is not a commercial program, the process returns to the beginning of step S2.

  In step S3 of FIG. 7, the system microcomputer 53 shown in FIG. 2 determines whether there is useful information that can be downloaded if the currently received program is a commercial program. If there is download data, the process proceeds to step S4. If there is no download data, the process returns to the beginning of step S2.

  In step S4 in FIG. 7, the system microcomputer 53 shown in FIG. 2 asks the viewer whether he / she wants to acquire the download data when there is download data, such as HDTV4 or SDTV4. The monitor screen displays the download data and asks whether to get it.

  In step S5 of FIG. 7, the system microcomputer 53 shown in FIG. 2 waits for a response from the viewer through the remote controller 54, and when the viewer is willing to acquire download data, the process proceeds to step S6. If the viewer is not willing to obtain download data, or if there is no response from the viewer after waiting for a certain time interval, the process returns to the beginning of step S2.

  7, the system microcomputer 53 shown in FIG. 2 determines whether or not the PCMCIA card 57 is inserted into the common interface 29. If the PCMCIA card 57 is inserted, the process proceeds to step S7. If the PCMCIA 57 card is not inserted, the process proceeds to step S8.

  7, the system microcomputer 53 shown in FIG. 2 records the download data in the memory 51 of the PCMCIA card 57.

  In step S8, the system microcomputer 53 shown in FIG. 2 displays on the screen that the PCMCIA card 57 is not inserted into the common interface 29, and returns to the beginning of the next step S2.

  A loop for acquiring download data in such a commercial program is executed while a commercial program using information useful for the viewer as download data is being broadcast.

  In this way, it is useful data to be acquired as download data for commercial programs. For example, in the case of commercials for game software, a new scene that can be obtained only through commercial programs for role-playing games; If it is a game such as a playground, Pokemon (registered trademark), it is a new character.

  If it is a book, it is text data of a part of the book, and if it is a movie, it is an image file of a typical scene or music data of an inserted song. If it is a supermarket or a mass retailer, it is a list of cheap items, and if it is a manufacturer of food and cooking equipment, it is a cooking menu. If it is an automobile manufacturer, it is a point for test rides from the inside of the car and application for related goods of the car.

  If it is a camera, it is image data for beautiful landscape photos and photo album editing software. If it is a cosmetic, it is image data of how to use the product or image data of a model. If it is a house or condominium, it is indoor simulation data.

  In addition, music data for commercial songs and image data for actors of image characters. The address of a homepage where special information and gifts can be obtained can be considered.

  Since it is unknown when such commercial information is broadcast, the viewer must always pay attention to the screen and subtitles of the commercial program. When recorded in the DVCR 6 or the HDD 6, the video information and the audio information are recorded, but the download data is included in the broadcast and cannot be acquired.

  Therefore, the conventional technology that requires viewers to pay attention to the commercial programs that they are broadcasting can only obtain information on the products of the companies they provide even if they watch the commercial programs. Things were broadcast many times, and there were few merits even if it watched.

  The present invention has been made in view of such a situation, and is intended to reliably convey the advertisement of a product by a commercial program to a viewer.

  In order to reliably convey the advertisement of the product by the commercial program to the viewer, when the digital broadcast is transmitted, the TS signal 30 shown in FIGS. 2 to 4 including the commercial program includes the commercial program. In addition to video information, audio information, text information, etc., information that is beneficial to the viewer is added as download data 103 and broadcasted. In the digital broadcast receiving apparatus 7 of FIG. 1, information useful to the viewer is extracted from the TS signal 30 from the broadcasting station through the common interface 29 of FIG. 2, and the PCMCIA card connected to the common interface 29. It is possible to use the game program, the character of the character, and other useful information that can be stored in the memory 51 of 57, and that can be executed by the digital broadcast receiving device 7, the game machine 6, the personal computer 6 or the like. I can do it.

  This allows viewers to view as many commercial programs as possible to obtain useful information.

  In the embodiment of the digital broadcast receiving apparatus of the present invention, a digital broadcast transport stream (TS) composed of video information, audio information, character information, and control information for combining these information and transmitted by the broadcasting means. ) In the signal 30, information that can be obtained by viewing a commercial program is added as broadcast data 103 and broadcasted, and the broadcast information is transported for limited reception of pay broadcasting in Europe and the like. Information that is useful to the viewer can be obtained by using the common interface 29 for extracting the (TS) signal to the outside of the digital broadcast receiving apparatus 7 and using the download data 103 of the commercial program.

  Usually, a free broadcast is a program that allows a viewer to watch for free by sending a commercial program for the promotion of a product. If the viewer stops viewing this commercial, If the sponsor has doubts about the effectiveness of the advertisement and the program production costs are reduced, an important problem will occur that the content of the broadcast deteriorates.

  However, the embodiment of the receiving apparatus for digital broadcasting of the present invention can send useful information in synchronization with the stream signal, and can acquire the useful information in a form that can be easily added even with the current product, and more. Encourage viewers to watch commercials.

It is a block diagram which shows embodiment of the receiver for digital broadcasting of this invention. It is a block diagram of the decoder circuit of FIG. It is a figure explaining separation of the stream signal by PSI. It is a block diagram of a digital broadcast stream signal. It is a block diagram of each stream of a digital signal. It is a block diagram of a section structure. It is a flowchart in the case of acquiring the download data 103 in a commercial program.

Explanation of symbols

1: Satellite broadcasting antenna 2: Converter 3: Decoder 4: HDTV, SDTV
5: Terrestrial receiving antenna 6: DVCR, HDD, personal computer, game machine 7: digital broadcast receiver 10, 15: tuner 29: common interface 30: TS signal 51: memory for download data 53: system microcomputer 54: Remote controller 57: PCMCIM card 103: Download data

Claims (4)

A digital broadcast receiving device for receiving a digital broadcast commercial program,
Video data, audio information, text information, and control information for combining these information, and download data useful for the viewer by viewing the commercial program in the transport stream signal including the commercial program A common interface is provided to extract information useful for broadcast viewers when receiving a digital broadcast that is added as a broadcast, and a transport stream signal to the outside of the device for limited reception of pay broadcasts. A digital broadcast receiving apparatus, comprising: an information source decoding unit that provides useful information to a viewer by download data of a program.   The information source decoding unit includes a card having a memory for storing information useful to the viewer through the common interface, and stores information useful to the viewer through the common interface in the memory. The digital broadcast receiving apparatus according to claim 1, further comprising: a computer that extracts information useful to the viewer stored in the viewer. A digital broadcast receiving method for receiving a digital broadcast commercial program,
Video data, audio information, text information, and control information for combining these information, and download data useful for the viewer by viewing the commercial program in the transport stream signal including the commercial program When receiving broadcasts, the information useful for the viewers broadcasted is taken out of the apparatus through a common interface for the transport stream signal for limited reception of pay broadcasts. A digital broadcast receiving method, wherein useful information is given to the viewer by download data.   4. The digital broadcast receiving method according to claim 3, wherein information useful for the viewer is stored in a memory of a card through the common interface in response to a command from a computer, and the information useful for the viewer stored in the memory is extracted. .