JP2015002361A - Transmitter and receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter and a receiver which allows for low-latency transmission of arbitrary additional information of less delay.SOLUTION: A transmitter 100a performs transmission control by performing multiplex transmission of a transmission control signal, including additional information and additional information control information for controlling the additional information. A receiver 200a has means for receiving the transmission control signal transmitted by the transmitter 100a, and performing reception control of the additional information, on the basis of the additional information control information included in the transmission control signal. The additional information and additional information control information are assigned to the extension region of the transmission control signal. The additional information control information is constituted of the additional information type, the number of pages, the page number, the target service designation system, the relative stream selection flag, the number of target services, the relative stream number, and the service identification.

Description

  The present invention relates to the technical fields of satellite broadcasting and terrestrial broadcasting, fixed communication, and mobile communication, and more particularly, to a digital data transmitting apparatus and receiving apparatus.

  In digital broadcasting, a variety of data such as video, audio, text, and images is transmitted as one multiplexed stream, thereby providing a flexible multimedia service. As an example, a Japanese satellite digital broadcasting system or a terrestrial digital broadcasting system employs an MPEG-2 system as a multiplexing system.

  FIG. 8 shows a block diagram of multiplexing in the MPEG-2 system. In the MPEG-2 system, video, audio, and subtitles are encoded by each encoding method and multiplexed into a PES packet. On the other hand, data broadcasting is multimedia-encoded, and program organization information is tabulated, then sectioned, and multiplexed together with PES packets into MPEG-2 TS packets (hereinafter referred to as TS). The multiplexed TS is subjected to transmission path encoding processing according to various transmission paths such as satellite and ground, and a modulated wave signal is generated and transmitted to the various transmission paths.

  In FIG. 8, video, audio, subtitles, data broadcast, and program organization information are each one system, but there may be a case where a plurality of these are provided and multiplexed on one system TS. There is also a broadcasting system that performs transmission line encoding processing capable of transmitting a plurality of TSs with one channel (one satellite repeater), such as Japanese BS digital broadcasting.

  Focusing on caption transmission in the MPEG-2 system, a transmission system using an independent PES format is recommended in the current digital broadcasting (see, for example, Non-Patent Document 1).

  Independent PES transmission methods include synchronous PES transmission method and asynchronous PES transmission method, and synchronous PES transmission method requires timing synchronization between data in the stream and other streams such as video / audio. The asynchronous PES transmission method is a method used when timing synchronization is unnecessary. As main usage examples, the synchronous type is used for subtitle transmission, and the asynchronous type is used for character super transmission (see, for example, Non-Patent Document 2).

  This is a method that can be displayed by decoding the contents of the TS packet. After a series of program reception processes (table acquisition such as NIT, SDT, EIT, PAT, etc.) included in the TS packet, Since a PES packet is acquired, even if it is desired to display an immediate character superimposition, it takes time to generate a table on the transmission side and to acquire and analyze a table on the reception side, so that a delay time occurs. .

  An example of a transmission line coding method using the MPEG-2 system as a multiplexing method is a transmission method for advanced broadband satellite digital broadcasting (hereinafter referred to as an advanced satellite broadcast transmission method) (for example, see Non-Patent Document 3). ). A block diagram of the advanced satellite broadcast transmission system is shown in FIG. In addition to the TS, this method can also transmit a TLV packet suitable for IP packet transmission or the like, but is omitted in the description here.

  Referring to FIG. 9, transmission apparatus 100 includes frame generation section 110, transmission control information frame generation section 120, BCH encoding sections 130-1 and 130-2, and LDPC encoding sections 140-1 and 140-. 2, mapping units 150-1 and 150-2, signal point sequence multiplexing unit 160, and orthogonal modulation unit 170.

  The one or more input TSs are multiplexed on the multiplexed frame by the frame generation unit 110. A multiplex frame in transmission line coding of this scheme is composed of one frame of 120 slots, and a maximum of 16 TSs can be assigned in units of slots. The TS is assigned to each slot based on transmission control information supplied from the outside. In this system, it is possible to multiplex up to 16 types of TS in one frame. Each TS is assigned a relative stream number of 0 to 15, and each relative stream number is associated with a 16-bit stream identification.

  The transmission control information is composed of information such as the modulation scheme for each slot, the allocation of LDPC coding rate, and the number of slots allocated to one or more TSs, and the contents are used for transmission control after 2 frames. Is done. Therefore, the content of the transmission control information is updated two frames before the frame configuration for transmitting the main signal such as TS is updated.

  The transmission control information input to the transmission control information frame generation unit 120 performs framing of transmission control information at the same cycle as the multiplexed frame, and also includes a frame generation unit 110, a BCH encoding unit 130-1, and an LDPC encoding unit 140. -1, the mapping unit 150-1 and the signal point sequence multiplexing unit 160 generate and supply various control signals such as gate signals.

  The data framed by the frame generator 110 is output with the parity of the BCH code added by the BCH encoder 130-1.

  The signal to which the parity of the BCH code is added is output by the LDPC encoding unit 140-1 with the parity of the LDPC code having the coding rate specified by the control signal supplied from the transmission control information frame generating unit 120 added. The

  The mapping unit 150-1 performs mapping of the modulation scheme specified by the control signal supplied from the transmission control information frame generation unit 120 on the signal to which the parity of the LDPC code is added, and the signal on the IQ plane A series of points is output.

  On the other hand, the data framed by the transmission control information frame generator 120 is output with the parity of the BCH code added by the BCH encoder 130-2.

  The signal to which the parity of the BCH code is added is encoded by the LDPC encoder 140-2 at a coding rate (1/3) defined for a signal for storing transmission control information (hereinafter referred to as a transmission control signal). The parity of the LDPC code is added and output.

  The mapping unit 150-1 performs mapping of the modulation scheme (π / 2 shift BPSK) defined for the transmission control signal on the signal to which the parity of the LDPC code is added, and the signal point on the IQ plane is mapped. A series is output.

  The signal point sequences output from the mapping units 150-1 and 150-2 are ordered by the signal point sequence multiplexing unit 160 based on the control signal supplied from the transmission control information frame generation unit 120. Is time-division multiplexed and output.

  The signal point sequence time-division multiplexed by the signal point sequence multiplexing unit 160 is converted into a modulated wave signal by orthogonal modulation by the orthogonal modulation unit 170 and sent to the transmission path.

  On the other hand, the receiving apparatus 200 includes an orthogonal demodulation unit 210, a signal point sequence separation unit 220, LLR calculation units 230-1 and 230-2, LDPC decoding units 240-1 and 240-2, and a BCH decoding unit 250-. 1 and 250-2, and a transmission control information separator 260.

  The modulated wave signal input via the transmission path is orthogonally demodulated by the orthogonal demodulator 210 and converted into a signal point sequence that is time-division multiplexed.

  The signal point sequence time-division multiplexed by the orthogonal demodulator 210 separates the signal point sequence corresponding to the TS by the signal point sequence separation unit 220, outputs the signal point sequence to the LLR calculation unit 230-1, and converts it into a transmission control signal. The corresponding signal point series is separated and output to the LLR calculator 230-2.

  The signal point sequence corresponding to the transmission control signal output from the signal point sequence separation unit 220 is a log likelihood ratio based on the signal point arrangement of the modulation scheme defined for the transmission control signal in the LLR calculation unit 230-2. Calculate (LLR) sequence and output.

  The LLR sequence output from the LLR calculation unit 230-2 is LDPC decoded at the coding rate defined for the transmission control signal by the LDPC decoding unit 240-2 and output.

  The LDPC decoding sequence output from the LDPC decoding unit 240-2 is BCH decoded and output by the BCH decoding unit 250-2.

  The transmission control information separation unit 260 extracts transmission control information from the BCH decoding sequence output from the BCH decoding unit 250-2, and the gate signal is sent to the LLR calculation unit 230-1, the LDPC decoding unit 240-1, and the frame separation unit 270. Are generated and supplied, and transmission control information is output as necessary.

  The signal point sequence corresponding to the TS output from the signal point sequence separation unit 220 is the LLR calculation unit 230-1 of the modulation scheme specified by the control signal supplied from the transmission control information separation unit 260. A log likelihood ratio (LLR) sequence is calculated and output based on the signal point arrangement.

  The LLR sequence output from the LLR calculation unit 230-1 is LDPC-decoded and output at the coding rate specified by the control signal supplied from the transmission control information separation unit 260 by the LDPC decoding unit 240-1.

  The LDPC decoding sequence output from the LDPC decoding unit 240-1 is BCH decoded and output by the BCH decoding unit 250-1.

  The BCH decoding sequence output from the BCH decoding unit 250-1 is a frame separation unit 270 that outputs one or more desired TSs based on the control signal supplied from the transmission control information separation unit 260.

  Next, the configuration of transmission control information will be described with reference to FIG. FIG. 10 shows bit allocation of TMCC information transmitted by a transmission control signal in the same system. All 9422 bits constitute transmission control information for one frame.

  The “change instruction” is a counter that is incremented when the transmission control information is changed.

  “Transmission mode / slot information” is configured with information designating a modulation scheme, a coding rate, the number of assigned slots, and a satellite backoff amount for transmission modes 1 to 8.

  The “stream type / relative stream information” is configured by information designating the stream type (TS / TLV / other) of the relative streams 0 to 15.

  The “packet format / relative stream information” is configured by information designating the packet length, synchronization pattern bit length, and synchronization pattern of each of the relative streams 0 to 15.

  The “pointer / slot information” is composed of information specifying the head position of the head packet and the tail position of the tail packet in each slot.

  The “relative stream / slot information” is configured by information designating the relative stream number of each slot.

  The “relative stream / transmission stream ID correspondence table” includes information specifying the transmission stream ID for the relative stream numbers 0 to 15.

  The transmission stream ID is TS_ID of the MPEG-2 system when the stream type is TS. “Transmission / reception control information” is used for uplink control and the like.

  The last 3614 bits are defined as “extension information”. The first 16 bits of the extension information are “extension identification”, and the subsequent 3598 bits are the “extension area” that can actually be used. Normally, all the extension identifications are stuffed with “0”, and in this case, all the extension areas are stuffed with “1” and transmitted. When the extended area is used, all the extended identification values are values other than “0” (see, for example, Non-Patent Document 3).

  If the “extended area” can be utilized for caption super display or the like, it is possible to expect transmission with a shorter delay time than transmission by the independent PES format.

“Data Broadcast Coding and Transmission Methods for Digital Broadcasting Standards ARIB STD-B24 Version 5.7 (Part 1), Volume 1, Part 3, Chapter 9, [online], revised on March 19, 2013, ARIB [Search June 10, 2013] Internet <URL: http://www.arib.or.jp/english/html/overview/doc/2-STD-B24v5_7-1p3.pdf> “Data Broadcast Coding and Transmission Methods in Digital Broadcasting Standards ARIB STD-B24 5.7 Edition (Part 3), Volume 3, Chapter 4, [online], revised on March 19, 2013, ARIB, [Heisei June 10, 2013 search], the Internet <URL: http://www.arib.or.jp/english/html/overview/doc/2-STD-B24v5_7-3p3.pdf> "Transmission system for advanced broadband satellite digital broadcasting standard ARIB STD-B44 1.0 version, [online], formulated on July 29, 2009, ARIB, [searched on June 10, 2013], Internet <URL: http: //www.arib.or.jp/english/html/overview/doc/2-STD-B44v1_0.pdf>

  As described above, the transmission method using the independent PES format based on the MPEG-2 system has a room for improvement from the viewpoint of quick subtitle / character super-transmission because of the delay associated with transmission and reception. On the other hand, for example, when paying attention to the above-mentioned advanced satellite broadcast transmission system, it is possible to transmit in the physical layer lower than the multiple layer of the MPEG-2 system by using the extension area of the transmission control signal. There is a possibility of transmission with low delay.

  However, when multiple TSs or services are multiplexed and transmitted in one channel or one repeater, additional information such as character superimposing is presented to which TS and which service by transmission control signal It is not possible to determine whether to do so, and fine control is not possible.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission apparatus and a reception apparatus having additional information transmission means such as a character supermarket, which has a short delay time and can be finely controlled.

  The present invention provides means for transmitting arbitrary additional information with a low delay by using an extension region of a transmission control signal in a transmission line coding system used in various transmission lines. More specifically, the following features of the present invention will be described below.

  The first feature is a digital data transmitting apparatus that performs transmission control by multiplexing transmission control signals, and the transmission control signal includes additional information and additional information control information for controlling the additional information. It is characterized by including these.

  The second feature is that the additional information control information is transmitted in the additional information type information indicating the type of additional information, the page number information required for transmission of the additional information, the page number information being transmitted, and one transmission path. Stream identification information for identifying any one or more data streams from one or more data streams, and service identification for identifying any one or more services from one or more services transmitted in one transmission path It contains one or more of the information.

  The third feature is that the stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted in one transmission path, and each bit and each stream are associated one-to-one. And

  The fourth feature is that the service identification information includes the number of services for which additional information is to be presented, the service identification of all services for which additional information is to be presented, and the relative stream of the stream in which the services are multiplexed. Any one or more of the stream numbers is included.

  The fifth feature is that the additional information control information includes target service specifying method information that specifies a method for specifying a service to be presented as additional information. Depending on the value of the target service specifying method information, Specify the presentation method of the following: presentation to all services multiplexed in any one or more streams, and presentation to services specified by any one or more relative stream numbers and service identification It is characterized by doing.

  The sixth feature is that additional information is received based on the additional information control information of the transmission control signal.

  The seventh feature is that additional information type information indicating the type of additional information, page number information required for transmission of additional information, page number information being transmitted, and transmission within one transmission path, according to additional information control information Stream identification information for identifying any one or more data streams from one or more data streams to be transmitted, and a service for identifying any one or more services from one or more services transmitted in one transmission path The identification information is specified to be presented based on one or more additional information.

  The eighth feature is that the stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted in one transmission path, and is added based on information in which each bit is associated with each stream on a one-to-one basis. Designated to present information.

  The ninth feature is that the service identification information includes the number of services for which additional information is to be presented, the service identification of all services for which additional information is to be presented, and the relative stream of the stream in which the services are multiplexed. It is specified that additional information is presented based on any one or more of the stream numbers.

  The tenth feature is that the additional information control information includes target service specifying method information that specifies a method for specifying a service to be presented as additional information, and the value of the target service specifying method information is used for all services. Presentation method, presentation to all services multiplexed in any one or more streams, and presentation to services specified by any one or more relative stream numbers and service identifications are selected. The additional information is presented.

  That is, the transmission apparatus according to the present invention is a digital data transmission apparatus that performs transmission control by multiplexing transmission control signals, and the transmission control signal includes additional information and additional information for controlling the additional information. Control information.

  In the transmitting apparatus according to the present invention, the additional information control information includes additional information type information indicating a type of additional information, page number information required for transmission of additional information, page number information during transmission, and transmission within one transmission path. Stream identification information for identifying any one or more data streams from one or more data streams to be identified, and for identifying any one or more services from one or more services transmitted in one transmission path It includes one or more of the service identification information.

  In the transmission device according to the present invention, the stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted in one transmission path, and each bit is associated with each stream in a one-to-one correspondence. It is characterized by.

  In the transmission apparatus according to the present invention, the service identification information includes the number information of services to be presented with additional information, the service identifications of all services to be presented with additional information, and a stream in which the services are multiplexed. Any one or more of the relative stream numbers.

  In the transmission apparatus according to the present invention, the additional information control information includes target service specifying method information that specifies a method for specifying a service to be presented as additional information. Presentation to a service, presentation to all services multiplexed on any one or more streams, and presentation to a service identified by any one or more relative stream numbers and service identifications It is characterized by specifying a method.

  Furthermore, the receiving apparatus according to the present invention is a receiving apparatus that receives a signal transmitted by the transmitting apparatus of the present invention, and includes means for performing reception control of the additional information based on the additional information control information of the transmission control signal. It is characterized by having.

  Further, in the receiving apparatus according to the present invention, the additional information control information includes additional information type information indicating a type of additional information, page number information required for transmission of additional information, page number information during transmission, and one transmission path. In order to identify any one or more services from one or more services transmitted in one transmission path and stream identification information for identifying any one or more data streams transmitted from the network The reception control is performed for additional information specified based on one or more of the service identification information.

  Also, in the receiving device according to the present invention, the stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted within one transmission path, and each bit and each stream are associated with each other in one-to-one correspondence. Based on this, it is specified that additional information is presented.

  In the receiving apparatus according to the present invention, the service identification information includes the number information of services to be presented with additional information, the service identifications of all services to be presented with additional information, and a stream in which the services are multiplexed. The additional stream information is specified based on any one or more of the relative stream numbers.

  In the receiving device according to the present invention, the additional information control information includes target service specifying method information for specifying a service specifying method for which additional information is to be presented. Specify one of presentation to service, presentation to all services multiplexed in any one or more streams, and presentation to services specified by any one or more relative stream numbers and service identifications According to the presenting method, the additional information is received.

  According to the present invention, when a stream or service such as a plurality of TSs is transmitted in a transmission system having an extension area in the transmission control signal, arbitrary additional information is presented to the target service with low delay in detail. It becomes possible.

It is a figure which shows the block diagram which shows the structure of the transmitter of one Embodiment by this invention, and a receiver. It is a figure which shows the detailed block diagram of the transmission control information and additional information frame generation part in the transmitter of one Embodiment by this invention. Three target service designation systems according to the present invention (all streams (TS) in a transmission line are targeted / specified one or more streams (TS) included in all services included in the targeted / specified one or more streams (TS ) Is a diagram showing an example of bit allocation in the extended area corresponding to one or more services included in). It is a figure which shows the example of the relationship between the value of "additional information classification" and allocation based on this invention. It is a figure which shows the value of the "target service designation | designated system" which concerns on this invention, and the relationship of allocation. It is a figure which shows the allocation bit of the relative stream selection flag which concerns on this invention. It is a figure which shows the detailed block diagram of the transmission control information in the receiver of one Embodiment by this invention, and an additional information separation part. It is a figure which shows the block diagram of the multiplexing in an MPEG-2 system. It is a figure which shows the block diagram of the conventional advanced satellite broadcast transmission system. It is a figure which shows the bit allocation of the TMCC information transmitted with the transmission control signal in an advanced satellite broadcast transmission system.

  Hereinafter, a transmission apparatus and a reception apparatus according to an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same reference numerals will be given to the same components.

  In showing this embodiment, an example in which the present invention is applied to an advanced satellite broadcast transmission system as a transmission system capable of transmitting a plurality of streams such as TS and services for transmitting digital data by one channel or satellite repeater. explain.

(Device configuration)
[Transmitter]
FIG. 1 is a block diagram illustrating a configuration of a transmission device and a reception device according to an embodiment of the present invention. Referring to FIG. 1, a transmission apparatus 100a according to the present embodiment includes a frame generation unit 110, a transmission control information and additional information frame generation unit 120a, BCH encoding units 130-1 and 130-2, and LDPC encoding. Sections 140-1 and 140-2, mapping sections 150-1 and 150-2, a signal point sequence multiplexing section 160, and an orthogonal modulation section 170.

  When comparing the conventional transmission device 100 with the transmission device 100a of the present embodiment, the frame generation unit 110, the BCH encoding units 130-1 and 130-2, the LDPC encoding units 140-1 and 140-2, , Mapping unit 150-1 and 150-2, signal point sequence multiplexing unit 160, and orthogonal modulation unit 170 are the same, but instead of transmission control information frame generation unit 120, transmission control information and The difference is that an additional information frame generation unit 120a is provided.

  Frame generation unit 110, BCH encoding units 130-1 and 130-2, LDPC encoding units 140-1 and 140-2, mapping units 150-1 and 150-2, signal point sequence multiplexing unit 160, orthogonal modulation unit 170 9 functions in the same manner as that of the conventional transmission apparatus 100 shown in FIG. 9, and thus the description thereof is omitted here. The functions of the transmission control information and additional information frame generation unit 120a will be described below.

  A detailed block diagram of the transmission control information and additional information frame generation unit 120a is shown in FIG. The input signals are transmission control information, additional information, and additional information control information. The additional information control information includes an additional information type, a page number, a page number, a target service designation method, a relative stream selection flag, a target service number (n), a relative stream number, and a service identification.

  The additional information type is composed of a bit pattern for designating the character super, graphic, voice, and type.

  The number of pages indicates the number of frames required to transmit additional information.

  The page number indicates what frame information is to be transmitted over one or more frames.

In the target service specification method, when specifying the target service of additional information,
-Target all streams (TS) in the transmission path-Target all services included in one or more specific streams (TS)-1 included in one or more specific streams (TS) It is composed of a bit pattern indicating a method for specifying a target service, such as targeting the above services.

  The relative stream selection flag is configured by a bit pattern indicating which stream (TS) is to be targeted when one or more specific streams (TS) are targeted for additional information.

  The target service number (n), the relative stream number, and the service identification define whether one or more services included in one or more specific streams (TS) are to be the target of additional information. That is, when n sets of specific relative stream number-service identification combinations are designated, the number of target services is n, and n sets of relative stream numbers-service identifications are designated.

  The transmission control information is written in the area from the transmission mode / slot information to the transmission / reception control information in the bit allocation of the TMCC information in FIG. Of the extended information, for the extended identification, for example, “0000000000000001” other than “0000000000000000000” is set, so that the extended area can be used. Additional information and additional information control information are written and output in the extended area.

  The control signal generator 121a generates a control signal based on the transmission control information and sends it to the functional block to be controlled.

The above three target service designation methods,
-Target all streams (TS) in the transmission path-Target all services included in one or more specific streams (TS)-1 included in one or more specific streams (TS) FIG. 3 shows an example of bit allocation in the case where the format of the extended area corresponding to the above service is the format 1, 2, and 3, respectively.

  The number of pages, page number, and additional information type are common items for formats 1 to 3. The relative stream selection flag is an item unique to Format 2, and the number of target services, the relative stream number, and the service identification are items unique to Format 3.

  Since 16 bits are assigned to the page number and the page number, the page number and the current page number can be described in the range of the page number from 1 to 65536.

  Since the additional information type is assigned 8 bits, 256 types of additional information types can be defined. For example, if assignment as shown in FIG. 4 is performed, character super, graphic, and audio information can be selected and transmitted as additional information.

  For the target service designation method, 8 bits are allocated. For example, if the allocation is performed as shown in FIG. 5, the target service of the additional information can be selected and specified from any of all streams (such as TS), any stream, and any service identification service of any stream. it can.

  The relative stream number selection flag, which is an item unique to format 2, is assigned 16 bits. For example, if each bit is associated with a relative stream number and assignment as shown in FIG. 6 is performed, additional information can be presented for a stream having a relative stream number corresponding to a bit of 1.

  8 bits, 4 bits, and 16 bits are assigned to the target service number, relative stream number, and service identification, which are items unique to format 3, respectively. In this case, the number of target services can be arbitrarily selected from 1 to 256, and the combination of the relative stream number and the service identification is repeatedly assigned the number of times of the target service, so that an arbitrary number of services in the range of 1 to 256 are added to the target service. Can be presented.

  The additional information designated by the additional information type is transmitted using the additional information payload area. The size of the additional information payload area is 3550 bits for format 1, 3534 bits for format 2, (3542-20n) bits for format 3 or 3550 bits, but is necessary if it does not fit on one page This can be handled by specifying the number of pages as the number of pages and dividing.

  The additional information that is input is continuous data, but in order to transmit intermittently using the additional information payload area, the delay time adjustment unit uses the page number, page number, target service designation method, and target service number information. Is converted into burst data having a size matching the payload area and written to the payload area of the shift register.

  After all the additional information and the additional information control information are written in the shift register 123a, the data written in the shift register is sent to the BCH encoding unit 130-2. Further, based on the transmission control information, the control signal generation unit 122a performs frame generation unit 110, BCH encoding unit 130-1, LDPC encoding unit 140-1, mapping unit 150-1, and signal point sequence multiplexing unit. Various control signals for 160 are generated.

[Receiver]
The receiving apparatus 200a of the present embodiment includes an orthogonal demodulation unit 210, a signal point sequence separation unit 220, LLR calculation units 230-1 and 230-2, LDPC decoding units 240-1 and 240-2, and a BCH decoding unit. 250-1 and 250-2, transmission control information and additional information separation section 260a, and frame separation section 270.

  Comparing the conventional receiving apparatus 200 with the receiving apparatus 200a of the present embodiment, the orthogonal demodulation unit 210, the signal point sequence separation unit 220, the LLR calculation units 230-1 and 230-2, and the LDPC decoding unit 240- 1 and 240-2, BCH decoding units 250-1 and 250-2, and a frame separation unit 270. However, instead of the transmission control information separation unit 260, transmission control information and additional information are provided. The difference is that a separation unit 260a is provided.

  The orthogonal demodulation unit 210, the signal point series 220, the LLR calculation units 230-1 and 230-2, the LDPC decoding units 240-1 and 240-2, the BCH decoding units 250-1 and 250-2, and the frame separation unit 270 are: Since it functions in the same manner as that of the conventional receiving apparatus 200 shown in FIG. 9, the description thereof is omitted here, and the functions of the transmission control information and additional information separation unit 260a will be described below.

  A detailed block diagram of the transmission control information and additional information separation unit 260a is shown in FIG. The input signal is a BCH decoding sequence input from the BCH decoding unit 250-2, and transmission control information (TMCC information) is obtained by accumulating in the shift register 261a.

  The control signal generator 262a outputs the transmission control information to the outside as necessary. Further, since the additional information is intermittently received using the additional information payload area, the delay time adjusting unit 263a performs continuous data based on the information on the number of pages, the page number, the target service designation method, and the number of target services. If the target service is received, the additional information is sent to the presentation means (not shown) designated by the information identification and presented.

  Next, in order to explain the effect of the present invention, the information bit rate is calculated based on the transmission parameters of the advanced satellite broadcast transmission broadcasting system. The transmission control signal is included in 4 × 66 symbols in the modulation frame 9296 symbols, and the extension area of the transmission control signal is 3614 bits in 31680 bits. Therefore, when the symbol rate is Sr, the information bits in the extension area Rate I = Sr × 4 × 66/9296 × 3598/31680, and when Sr = 32.5941 Mbaud, I = 105.129 [kbps]. By using the transmission device and the reception device according to the present invention, transmission control of flexible arbitrary additional information is always performed in a transmission system in which a plurality of streams and services are mixed while maintaining a constant speed equivalent to about 105 kbps. By using the signal extension area, it becomes possible to transmit arbitrary additional information prior to the main signal, and all three stream designation methods, stream designation, and designation by relative stream number + service identification Fine presentation control is possible.

  Although the above embodiments have been described as representative examples, it will be apparent to those skilled in the art that many variations and substitutions can be made within the spirit and scope of the invention. For example, in the above-described embodiment, an example in which the present invention is applied to an advanced satellite broadcast transmission system has been shown. However, the present invention can be applied to any transmission system having a transmission control signal, for example, a BS in Japan. The present invention can also be applied to ISDB-S, which is a broadcasting system for digital broadcasting, ISDB-T, which is a broadcasting system for terrestrial digital broadcasting, and DVB-S2 and DVB-T2, which are broadcasting systems for Europe. However, since the size of the extension area that can be secured in the transmission control information differs depending on the transmission method, numerical adjustment is necessary for each system to be applied. For example, it is possible to reduce the amount of information by minimizing the bit allocation in FIG. Further, in a transmission method without a function for transmitting a plurality of streams, it is not necessary to assign a relative stream number in the format 3 in FIG.

  Accordingly, the invention should not be construed as limited by the embodiments described above, but only by the claims.

  According to the present invention, in a digital data transmission apparatus and reception apparatus, arbitrary additional information can be quickly transmitted as compared with subtitle / character super transmission included in the TS packet of the main signal in the MPEG-2 system which is the conventional technique. For example, it is useful for applications such as high-speed transmission means for emergency information such as emergency warning broadcasts and emergency earthquake warnings.

100, 100a Transmission device 110 Frame generation unit 120 Transmission control information frame generation unit 120a Transmission control information and additional information frame generation unit 121a Delay time adjustment unit 122a Control signal generation unit 123a Shift registers 130-1, 130-2 BCH encoding unit 140-1, 140-2 LDPC encoders 150-1, 150-2 Modulation mapping unit 160 Signal store sequence multiplexer 170 Orthogonal modulator 200, 200a Receiver 210 Orthogonal demodulator 220 Signal store sequence separator 230-1, 230-2 LLR calculation unit 240-1, 240-2 LDPC decoding unit 250-1, 250-2 BCH decoding unit 260 Transmission control information separation unit 260a Transmission control information and additional information separation unit 261a Shift register 262a Control signal generation unit 263a Delay time adjustment unit 270 Frame separation

Claims (10)

A transmission apparatus for digital data that performs transmission control by multiplexing transmission control signals, wherein the transmission control signals are:
Additional information,
Additional information control information for controlling the additional information,
A transmission apparatus comprising: The additional information control information is
Additional information type information indicating the type of additional information,
Page number information required for transmission of additional information and page number information being transmitted;
Stream identification information for identifying any one or more data streams from one or more data streams transmitted in one transmission path; and
2. The transmission apparatus according to claim 1, further comprising at least one of service identification information for identifying any one or more services from one or more services transmitted in one transmission path.   The stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted in one transmission path, and each bit and each stream are associated with each other on a one-to-one basis. Transmitter. The service identification information is:
Information about the number of services for which additional information is to be presented;
Any one or more of the service identification of all services to be presented with additional information and the relative stream number of the stream in which the service is multiplexed;
The transmission apparatus according to claim 2, further comprising: The additional information control information is
Including target service specifying method information for specifying a method for specifying a service to be presented as additional information, and depending on the value of the target service specifying method information,
Presentation to all services,
Presentation to all services multiplexed into any one or more streams, and
Presentation to a service identified by any one or more relative stream numbers and service identifications;
The transmission apparatus according to any one of claims 2 to 4, wherein any one of the presentation methods is designated. A receiving device that receives a signal transmitted by the transmitting device according to any one of claims 1 to 5,
A receiving apparatus, comprising: means for performing reception control of the additional information based on additional information control information of the transmission control signal. By the additional information control information,
Additional information type information indicating the type of additional information;
Page number information required for transmission of additional information and page number information being transmitted;
Stream identification information for identifying any one or more data streams from one or more data streams transmitted in one transmission path;
Reception control is performed on additional information specified based on one or more of service identification information for identifying one or more arbitrary services from one or more services transmitted in one transmission path. The receiving device according to claim 6.   The stream identification information is composed of the same number of bits as the maximum number of streams that can be transmitted in one transmission path, and specifies that each bit and each stream is to be presented with additional information based on information associated with each stream on a one-to-one basis. The receiving apparatus according to claim 7. The service identification information is:
Information about the number of services for which additional information is to be presented;
Any one or more of the service identification of all services to be presented with additional information and the relative stream number of the stream in which the service is multiplexed;
The receiving apparatus according to claim 7, wherein the receiving apparatus is designated to present additional information based on the information. The additional information control information includes target service designation method information for designating a service designation method for which additional information is to be presented,
Depending on the value of the target service designation method information,
Presentation to all services,
Presentation to all services multiplexed into any one or more streams, and
Presentation to a service identified by any one or more relative stream numbers and service identifications;
The receiving apparatus according to claim 7, wherein the additional information is received in accordance with a presentation method for designating any one of the receiving apparatus.