CN101278562A - Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof - Google Patents

Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof Download PDF

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Publication number
CN101278562A
CN101278562A CN200680036245.3A CN200680036245A CN101278562A CN 101278562 A CN101278562 A CN 101278562A CN 200680036245 A CN200680036245 A CN 200680036245A CN 101278562 A CN101278562 A CN 101278562A
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Prior art keywords
dual
turbo
stream
turbo stream
bag
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CN200680036245.3A
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CN101278562B (en
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朴义俊
权容植
柳廷必
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from KR1020050113662A external-priority patent/KR100756036B1/en
Priority claimed from US11/416,253 external-priority patent/US8619876B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23611—Insertion of stuffing data into a multiplex stream, e.g. to obtain a constant bitrate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23412—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs for generating or manipulating the scene composition of objects, e.g. MPEG-4 objects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Abstract

A digital broadcasting transmission system for carring turbo processing to digital broadcoasting transmission flow and sending the processed flow, and a signal processing method thereof, includes a parity area generating unit preparing a first area for parity insertion with respect to a dual transport stream (TS) which includes a normal stream and a turbo stream as multiplexed, a first interleaver interleaving the dual TS which is transmitted from the parity area generating unit, a turbo processing unit detecting the turbo stream from the interleaved dual TS, exclusively encoding the detected turbo stream for turbo-processing, and stuffing the encoded turbo stream into the dual TS, a deinterleaver deinterleaving the dual TS which is processed by the turbo processing unit, and a transmitting unit transmitting the dual TS which is processed at the deinterleaver.

Description

Method, digital broadcast transmission and the receiving system and the signal processing method thereof that are used for the TURBO transmission of digital broadcast transmission stream
Technical field
Each side of the present invention relates to the method that a kind of turbo of being used for handled and sent method, a kind of digital broadcasting reception and the transmitting system and the processing signals thereof of digital broadcast transmission stream.More particularly, each side of the present invention relates to method and digital broadcast transmission and the receiving system that a kind of like this turbo of being used for handled and sent digital broadcast transmission stream, described method is by carrying out information exchange and mapping to the dual transmission stream (TS) that comprises general data and turbo data, and enhancing is according to the receptivity of earthwave Digital Television (DTV) system of the U.S. of Advanced Television Systems Committee (ATSC) residual sideband (VSB) transmission system.
Background technology
Advanced Television Systems Committee (ATSC) residual sideband (VSB) transmission system of using in earthwave Digital Television (DTV) system of the U.S. is a kind of single-carrier system, and described single-carrier system sends a field synchronization (sync) section for the unit of per 312 data segments.Therefore, on weak channel, particularly on Doppler's fading channel, the receptivity of ATSC VSB system is not good.
Fig. 1 is the block diagram of the ATSC VSB digital broadcasting transceiver of prior art.Digital broadcasting transceiver shown in Fig. 1 is to dispose according to enhanced VSB (E-VSB) system that is proposed by Phillips, and produces and send by strengthening or robust data is added the dual transport stream that the general data of standard A TSC VSB system disposes to.
As shown in Figure 1, the digital broadcast transmission machine comprises: randomizer 11; Reed-Solomon (RS) encoder 12 has the cascaded encoder form of parity byte being added to dual transmission stream, correcting the mistake that produces owing to the channel degradation during sending at reception period; Interleaver 13 interweaves to the RS coded data according to predetermined pattern; And 2/3 speed trellis encoder 14, the data that interweave are carried out grid coding with 2/3 speed, and the data map that will interweave is to 8 level symbols.Adopt this structure, the digital broadcast transmission machine is carried out error correction coding to dual transport stream.
The digital broadcast transmission machine also comprises: multiplexer 15, according to the data of the data format shown in Fig. 2 with field synchronization and the synchronous insertion of section error correction coding; And modulator 16, synchronous and field synchronization is inserted pilot tone by the section of predetermined direct current (DC) value being added to data symbol and insertion, the signal amplitude modulation that obtains is arrived on intermediate frequency (IF) carrier wave, to the IF signal filtering that obtains to produce residual sideband (VSB) signal, with VSB signal up conversion is radio frequency (RF) signal with frequency of expectation channel, and sends the RF signal by channel.
Therefore, in the digital broadcast transmission machine, according to the dual stream systems that on a channel, sends general data and enhancing or robust data described general data and enhancing or robust data are carried out multiplexingly, and general data and enhancing or robust data be input to randomizer 11.By the data randomization of randomizer 11, by carry out outer coding as 12 pairs of randomized data of RS encoder of outer encoder with input.Interleaver 13 comes the data of distributed code according to predetermined pattern.Is that unit carries out interior coding to the data that interweave by trellis encoder 14 with 12 symbols.Interior coded data is mapped to 8 level symbols.Field synchronization and section are inserted mapped data synchronously.Insert pilot tone and carry out the VSB modulation.With VSB signal up conversion is the RF signal, sends the RF signal by channel.
Digital broadcasting transmitter shown in Fig. 1 comprises: the tuner (not shown), and the RF conversion of signals that will receive by channel is a baseband signal; Demodulator 21 is carried out synchronous detecting and demodulation to baseband signal; Equalizer 22, the channel distortion that the signal compensation of demodulation is produced owing to many transmission paths; Viterbi decoder 23, the mistake of correcting balanced signal, and be symbol data with the signal decoding after the error correction; Deinterleaver 24 is reset symbol data according to the predetermined pattern of interleaver 13 distributed datas of digital broadcast transmission machine; RS decoder 25 carries out error correction; And remove randomizer 26, the data of correcting by RS decoder 25 are gone randomization, and output MPEG-2 (Motion Picture Experts Group) transport stream.Therefore, the digital broadcasting transmitter of Fig. 1 is baseband signal according to the order opposite with the digital broadcast transmission machine with RF signal down conversion, and the signal of conversion is separated the mediation equilibrium, and carries out channel-decoding, thereby recovers primary signal.
Fig. 2 illustrates according to the 8-VSB system that uses in the DTV of U.S. system and has inserted section synchronously and the VSB Frame of field synchronization.As shown in Figure 2, a frame comprises two.One comprises a field synchronization segments and 312 data segments of first section as described.In the VSB Frame, a section of wrapping corresponding to a MPEG-2 comprises synchronous and 828 the data symbols of 4 sign fields.Section among Fig. 2 synchronously and field synchronization be used for the synchronous and balanced of digital broadcasting transmitter.More particularly, when receiver is carried out when synchronous and balanced, the synchronous and field synchronization of the section that digital broadcast transmission machine and receiver are known is used as reference signal.The U.S. ground wave digital broadcasting system of Fig. 1 is configured to by the general data that strengthens or robust data is added the ATSC VSB system of prior art to is produced and send dual transport stream.Therefore, U.S.'s ground wave digital broadcasting system sends enhancing or robust data with general data.
Summary of the invention
Technical problem
Although except general data, in dual transport stream, also send to strengthen or robust data, the not good receptivity that the multipath channel distortion that causes owing to the transmission of common data stream causes do not have be improved significantly.In fact, almost do not improve receptivity by improved common data stream.In addition, for strengthening or robust stream, significantly do not improve receptivity yet.
Technical scheme
Therefore, an aspect of of the present present invention is to provide a kind of turbo of being used for to handle and send method and digital broadcast transmission and the receiving system and the signal processing method thereof of digital broadcast transmission stream, described method is by carrying out information exchange and mapping to the dual transmission stream (TS) that comprises general data and turbo data, and enhancing is according to the receptivity of the earthwave Digital Television (DTV) of the U.S. of Advanced Television Systems Committee (ATSC) residual sideband (VSB).
Can realize above-mentioned aspect of the present invention and/or other characteristics substantially by a kind of method of handling digital broadcast signal is provided, described method comprises: prepare first district, described first district is used for comprising that the dual transmission stream (TS) that flows multiplexing normal stream with turbo carries out the parity check insertion; The dual TS that comprises described first district is interweaved, detect turbo stream from the dual TS that interweaves, detected turbo stream is encoded specially, and the turbo stream of coding is filled into dual TS handles so that carry out turbo, the dual TS that turbo was handled deinterleaves, the dual TS that the turbo that transmission deinterleaves handled, receive the dual TS that sends, the dual TS of the described reception of demodulation, dual TS to demodulation carries out equilibrium, the normal stream of the dual TS of equilibrium is decoded recovering the general data bag, and the turbo stream of the dual TS of equilibrium is decoded to recover the turbo packet.
According to an aspect of the present invention, the method for handling digital broadcast signal also comprises: before preparing first district, prepare to be used for turbo stream is carried out second district that parity check is inserted; And carry out the multiplexing dual TS that produces by having the turbo stream and the normal stream that are used for carrying out therein second district that parity check inserts.
According to an aspect of the present invention, the step of detection turbo stream comprises: by the dual TS demultiplexing that interweaves being detected turbo stream; Insert second district of creating and come by being inserted into parity check detected turbo stream encryption for the parity check of detected turbo stream, turbo stream to coding interweaves, and carries out the multiplexing dual TS that constructs by the turbo stream that will interweave with normal stream.
According to an aspect of the present invention, the step of detection turbo stream also comprises: the base unit of the dual TS that will interweave is a symbol from byte conversion, and the base unit of the dual TS that will produce is a byte from symbol transition.
According to an aspect of the present invention, the step of the dual TS that transmission deinterleaves comprises: encode by being inserted into first district that is used for the parity check insertion for the parity check of the dual TS that deinterleaves, dual TS to coding interweaves, the dual TS that interweaves is carried out grid coding, undertaken multiplexingly by synchronizing signal being added to dual TS that grid coding crosses, and multiplexing dual TS carried out Channel Modulation and send the stream that obtains.
According to an aspect of the present invention, dual TS comprises the field that comprises a plurality of continuous bags, the Option Field of the package informatin of recording scheduled type is arranged on the bag in the precalculated position that is arranged in described, and not overlapping with turbo stream, Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
According to an aspect of the present invention, dual TS comprises the field that comprises a plurality of continuous bags, and turbo stream and normal stream are arranged in respectively in described a plurality of bag.
According to an aspect of the present invention, the step that normal stream is decoded comprises: decoding, wherein, normal stream to the dual TS of equilibrium is carried out error correction, normal stream to error correction is decoded, normal stream by the viterbi decoder decode is deinterleaved, correct the mistake of the normal stream that deinterleaves, and by going randomization to recover the general data bag to the normal stream of error correction.
According to an aspect of the present invention, the step of decoding turbo stream comprises: the turbo stream to the dual TS of equilibrium carries out the turbo decoding, turbo diffluence to the turbo decoding interweaves, the turbo stream that deinterleaves is carried out the Reed-Solomon decoding, and the turbo stream that Reed-Solomon is decoded goes randomization.
According to an aspect of the present invention, the method of handling digital broadcast signal also comprises: will replenish the fill area that reference sequences inserts dual TS, the normal stream that described dual TS comprises and turbo stream is multiplexing is used from fill area additional reference sequences of fetching and the additional reference sequences that the is stored in receiver dual TS of equalizing demodulation recently mutually.
According to an aspect of the present invention, the method for handling digital broadcast signal also comprises: normal stream and turbo are flowed multiplexing producing dual TS, and prepare fill area in dual TS.
According to an aspect of the present invention, the method for handling digital broadcast signal also comprises: before inserting additional reference sequences, the dual TS with fill area is carried out randomization.
According to an aspect of the present invention, the multiplexing step of normal stream and turbo stream is comprised: turbo stream is prepared to be used for second district that parity check is inserted.
According to an aspect of the present invention, the form of dual TS is the frame that comprises a plurality of continuous bags, and each bag comprises the self adaptation field, and fill area is at least a portion of self adaptation field.
According to an aspect of the present invention, dual TS comprises with predetermined inter-packet gap and is arranged on turbo stream in the bag of frame.
According to an aspect of the present invention, dual TS comprises: Option Field, be arranged on the bag in the precalculated position that is arranged in the field, not overlapping with turbo stream, fill area is at least a portion of the self adaptation field except Option Field, and Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
According to an aspect of the present invention, the field comprises 312 bags, and when 312 bags were divided into the unit of per 52 bags, the position of Option Field in the field was as follows: program clock reference (PCR): 52n+15, n=0; Original program clock reference (OPCR): 52n+15, n=1; Self adaptation field extension length: 52n+15, n=2; Transmission exclusive data length: 52n+15, n=3,4,5; And splicing counts down: 52n+19, n=0,1,2,3,4,5.
According to a further aspect in the invention, digit broadcasting system comprises: transmission source and digital broadcasting transmitter system, wherein, described transmission source comprises: the parity area generation unit, prepare to be used for first district that parity check is inserted to comprising with the dual transmission stream (TS) of the multiplexing normal stream of turbo stream; First interleaver interweaves to the dual TS that sends from the parity area generation unit; The turbo processing unit detects turbo stream from the dual TS that interweaves, and the turbo stream that detects is encoded specially handle to carry out turbo, and the turbo stream of coding is filled into dual TS; Deinterleaver deinterleaves to the dual TS of trubo processing unit processes; And transmitting element, be sent in the dual TS that deinterleaver is handled; Described digital broadcasting transmitter system comprises: demodulator receives dual transmission stream (TS) and the dual TS that receives is carried out demodulation; Equalizer carries out equilibrium to the dual TS of demodulation; First processor is decoded and is exported the general data bag the normal stream of the dual TS of equilibrium; And second processor, the turbo stream of the dual TS of equilibrium is decoded and exported the turbo packet.
According to an aspect of the present invention, first processor comprises: the viterbi decoder, carry out error correction to the normal stream of the dual TS of equilibrium, and the normal stream of error correction decoded; First deinterleaver deinterleaves to the normal stream by the viterbi decoder decode; First Read Solomon decoder is corrected in the mistake of the normal stream that first deinterleaver handles; And remove randomizer, and by going randomization to recover the general data bag to the normal stream of error correction, and second processor comprises: the turbo decoder, the turbo stream of the dual TS of equilibrium is decoded; Second deinterleaver, the turbo stream that turbo is decoded deinterleaves; Second Read Solomon decoder is decoded to the turbo stream that deinterleaves; And removing randomizer, the turbo stream that Reed-Solomon is decoded goes randomization.
According to an aspect of the present invention, dual TS comprises the field that comprises a plurality of continuous bags, and turbo stream and normal stream are arranged in respectively in described a plurality of bag.
According to an aspect of the present invention, dual TS comprises the field that comprises a plurality of continuous bags, the Option Field of the package informatin of recording scheduled type is arranged on the bag in the precalculated position that is arranged in described, and not overlapping with turbo stream, Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits at least one in exclusive data length and the self adaptation field extension length.
According to an aspect of the present invention, digit broadcasting system also comprises: the TS structural unit, by normal stream and turbo are flowed the multiplexing dual TS that produces; And the randomization unit, the dual TS that produces at the TS structural unit is carried out randomization, and the dual TS that will produce offers the parity area generation unit.
According to an aspect of the present invention, the TS structural unit comprises: reproducer, preparation are used for turbo stream is carried out second district that parity check is inserted, and service MUX, will be multiplexing with normal stream at the turbo stream that reproducer is handled, and export the stream that obtains.
According to an aspect of the present invention, the TS structural unit also comprises: first reed-solomon encoder, the turbo stream that the outside receives is encoded, and pre-interleaver, and the turbo stream of coding is interweaved and the stream that will obtain offers reproducer.
According to an aspect of the present invention, the turbo processing unit comprises: demodulation multiplexer, and the dual TS demultiplexing that will interweave at first interleaver, and detect turbo stream; The turbo encoder comes turbo stream is encoded by inserting second district that is used for the parity check insertion for the parity check of the turbo stream that is detected by demodulation multiplexer; The turbo interleaver interweaves to the turbo stream of crossing in the turbo coder processes; And the turbo data multiplexer, by flowing at the turbo that the turbo interleaver was handled and carrying out the multiplexing dual transmission stream (TS) of constructing in the normal stream of demodulation multiplexer demultiplexing.
According to an aspect of the present invention, the transmission source also comprises: the additional reference signal inserts the unit, receives dual TS, and the fill area that provides among the dual TS is provided the additional reference signal; And equalizer, use the additional reference signal that extracts from fill area recently the dual TS of demodulation to be carried out equilibrium mutually with additional reference signal being stored in receiver.
According to an aspect of the present invention, digit broadcasting system also comprises: transport stream (TS) structural unit, by normal stream and turbo stream are carried out the multiplexing dual TS that produces, and in dual TS, prepare fill area; And the randomization unit, the dual TS that provides from the TS structural unit is carried out randomization, and randomized stream is offered additional reference signal insertion unit.
According to an aspect of the present invention, the TS structural unit comprises: reproducer, prepare to be used for turbo stream is carried out second district that parity check is inserted; And service MUX, turbo stream and the normal stream that will handle at reproducer carried out multiplexing, prepares fill area, and exports the stream that obtains.
According to an aspect of the present invention, the TS structural unit also comprises: first reed-solomon encoder, the turbo stream that the outside receives is carried out the Reed-Solomon coding; And pre-interleaver, the turbo stream of coding is interweaved and the stream that will obtain offers reproducer.
According to an aspect of the present invention, dual TS comprises the frame that comprises a plurality of continuous bags, and each bag comprises the self adaptation field, and fill area is at least a portion of self adaptation field.
According to an aspect of the present invention, dual TS comprises Option Field, it is arranged on the bag of certain position that is arranged in the self adaptation field, not overlapping with turbo stream, and fill area is at least a portion of the self adaptation field except Option Field, and Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
According to an aspect of the present invention, the field comprises 312 bags, and when 312 bags were divided into the unit of per 52 bags, the position of Option Field in the field was as follows: program clock reference (PCR): 52n+15, n=0; Original program clock reference (OPCR): 52n+15, n=1; Self adaptation field extension length: 52n+15, n=2; Transmission exclusive data length: 52n+15, n=3,4,5; And splicing counts down: 52n+19, n=0,1,2,3,4,5.
Beneficial effect
From for the method that is used for that turbo handles and sends the TS of digital broadcasting according to a particular embodiment of the present invention, and the above description of digital broadcast transmission/receiving system and signal processing method thereof can understand, and can strengthen receptivity according to the earthwave Digital Television (DTV) of U.S. of Advanced Television Systems Committee (ATSC) residual sideband (VSB) by carry out information exchange and mapping for the dual transmission stream (TS) that comprises general data and turbo data.As a result, digital broadcasting transmission system not only provides the compatibility with existing general data transmitting system, also is provided at the improved receiving ability under the various reception environments.
Though do not require, it should be understood that and to use software, hardware and combination thereof to realize each side of the present invention.Though be described, it should be understood that in others of the present invention, can transmit by being recorded on the medium that is used to postpone playback for broadcast singal by wireless or wired transmission.
Though illustrate and described the present invention with reference to specific embodiment of the present invention, one skilled in the art will understand that under the situation of the spirit and scope of the present invention that do not break away from the claim qualification, can make various changes in form and details to it.
Description of drawings
By the following description of reference accompanying drawing to embodiments of the invention, these and/or others of the present invention and advantage will become clear and be more readily understood, wherein:
Fig. 1 is the block diagram that illustrates according to the digital broadcasting transceiver of the prior art of Advanced Television Systems Committee (ATSC) residual sideband (VSB) system;
Fig. 2 is illustrated in the exemplary frame structure of the VSB Frame that uses in the digital broadcasting transceiver of the prior art shown in Fig. 1;
Fig. 3 is the block diagram that illustrates according to the digital broadcasting transmission system of the embodiment of the invention;
Fig. 4 is used for the structure of digital broadcasting transmission system of detailed key-drawing 3 and the block diagram that provides;
Fig. 5 is the block diagram of transport stream (TS) structural unit that the digital broadcasting transmission system of Fig. 4 is shown;
Fig. 6 is the block diagram of structure of transmitting element that is shown specifically the digital broadcasting transmission system of Fig. 4;
Fig. 7 is the block diagram of example of turbo processing unit that the digital broadcasting transmission system of Fig. 4 is shown;
Fig. 8 is the block diagram of structure of turbo encoder that the turbo processing unit of Fig. 7 is shown;
Fig. 9 to Figure 15 illustrates the exemplary configurations of dual transmission stream bag of the digital broadcasting transmission system of Fig. 4;
Figure 16 illustrates the block diagram that replenishes the digital broadcasting transmission system of reference sequences (SRS) according to the transmission of the embodiment of the invention;
Figure 17 to Figure 23 illustrates the exemplary configurations of dual transmission stream bag of the additional reference sequences (SRS) of the digital broadcasting transmission system that comprises Figure 16;
Figure 24 is the block diagram that illustrates according to the structure of the digital broadcast receiving system of the embodiment of the invention;
Figure 25 is the block diagram that the turbo of the digital broadcast receiving system of Figure 24 decodes;
Figure 26 is the flow chart of example of signal processing method that is used for the digital broadcasting transmission system of key-drawing 6;
Figure 27 is the flow chart of example of signal processing method that is used for the turbo processing unit of key-drawing 7;
Figure 28 is the flow chart of example of signal processing method that is used for explaining the digital broadcast receiving system of Figure 24; And
Figure 29 is the flow chart of example of signal processing method that is used for explaining the turbo decoder of Figure 25.
Embodiment
Now will be in detail with reference to embodiments of the invention, its example is shown in the drawings, and wherein, identical label is represented identical parts all the time.Below with reference to the accompanying drawings embodiment is described so that explain the present invention.Ad hoc structure in the following description and parts only are used to help complete understanding the present invention.Therefore, clearly can not use these ad hoc structures and parts to realize the present invention.In addition, for fear of fuzzy the present invention on unnecessary details, be not described in detail known function, structure and parts in the following description.
Below describe Advanced Television Systems Committee (ATSC) Digital Television (DTV) system that hypothesis has been familiar with introducing the various aspects of MPEG-2 system, its details is described in corresponding standard.The example of the standard that may be correlated with has: the ATSC A/52B on June 14th, 2005, Digital Audio CompressionStandard (AC-3, E-AC-3), version B; The ATSC A/53E on December 27th, 2005, ATSCDigital Television Standard (A/53), version E; The ATSC A/54A on December 4th, 2003, Recommended Practice:Guide to the Use of the ATSC Digital TeleVisionStandard; ISO/IEC IS 13818-1:2000 (E), Information technology-Generic codingof moving pictures and associated audio information:Systems (second version) is (MPEG-2); And ISO/IEC IS 13818-2:2000 (E), Information technology-Genericcoding of moving pictures and associated audio information:Video (second version) (MPEG-2), the content of these standards and openly being incorporated herein by reference.Yet, should understand and can realize each side of the present invention and unrestricted according to other standard and system.In addition, below describe and use term " turbo " and " turbo data ", they are by term " strong " and " robust data " expression in some accompanying drawing.
Fig. 3 is the block diagram that illustrates according to the digital broadcasting transmission system of the embodiment of the invention.With reference to Fig. 3, digital broadcasting transmission system comprises: parity area generation unit 110, first interleaver 120, turbo processing unit 130, deinterleaver 140 and transmitting element 150.Parity area generation unit 110 is provided for inserting the district of parity byte in dual transmission stream (TS), described dual transmission stream comprises normal stream and turbo stream.In other words, dual TS is calculated parity check, and parity area (that is, record on the throne in) is inserted in parity check.In the following description, the parity area that provides by parity area generation unit 110 will be called as " district is inserted in first parity check ".
120 pairs of first interleavers have the dual TS that is provided for the district that parity check inserts by parity area generation unit 110 and interweave.Turbo processing unit 130 detects the turbo stream that is included among the dual TS that interweaves, and the turbo TS that detects is carried out turbo handle, and fill dual TS.Though not in all respects in requirement, the turbo that it should be understood that turbo processing unit 130 handles and can comprise that encoding process (for example to turbo TS convolutional encoding) is so that data turboization.
140 couples of dual TS from 130 outputs of turbo processing unit of deinterleaver deinterleave.Dual TS in deinterleaver 140 processed after, transmitting element 200 sends dual TS.Below will describe the structure of transmitting element 200 in detail.
According to the embodiment shown in Fig. 3, the turbo stream of handling through independent turbo is sent out with normal stream.Therefore, under multipath conditions or the receptivity in the mobile environment improve, simultaneously, provide compatibility with existing normal stream transmission/receiving system.Will also be understood that the turbo data can be the various forms of data that send except general data, such as the data of audio frequency, video, computer software, game data, music, shopping information, internet data, text, speech data and other type.In addition, according to each side of the present invention, general data can be included in other data outside the audio-video data of using in the digital broadcasting, the perhaps data of substituted audio-video data.
Below with reference to the block diagram of Fig. 4 digital broadcasting transmission system of key-drawing 3 in more detail.With reference to Fig. 4, digital broadcasting transmission system also comprises transport stream (TS) generation unit 300 and randomizer unit 150.TS generation unit 300 is by receiving normal stream and turbo stream, handles turbo stream and the turbo of normal stream and processing is flowed the multiplexing dual TS that produces.Though not middle in all respects requirement can receive normal stream and turbo stream from external module (for example, broadcast camera) or internal module (for example, compression module is as MPEG-2 module, video encoder and audio coder).
The dual TS randomization that randomizer unit 150 will be produced by TS generation unit 300, and provide it to parity area generation unit 110.Therefore, parity area generation unit 110 provides parity area for dual TS.Because except TS generation unit 300 and randomizer unit 150, the parts among Fig. 4 are identical on function with the parts of the foregoing description of Fig. 3, therefore for the sake of simplicity, other description will be omitted.
The exemplary configurations of TS generation unit 300 is described hereinafter with reference to Fig. 5.TS generation unit 300 comprises first reed-solomon encoder 310, pre-interleaver 320, reproducer 330, service MUX (multiplexer) 340.Though example shown in Figure 5 is used first reed-solomon encoder 310 and pre-interleaver 320, these can be omitted or can use other parts (not shown) to replace.Preferably (but not requiring) when using first reed-solomon encoder 310, uses it with pre-interleaver 320.The position of pre-interleaver 320 and the position of reproducer 330 are interchangeable.
First reed-solomon encoder 310 is carried out coding by the turbo stream that parity byte is added to reception.The turbo stream that pre-320 pairs of interleavers have added parity byte interweaves.The turbo stream that 330 pairs of reproducers interweave provides parity area.In the following description, the parity area that provides of reproducer 330 will be called as " second parity area ".
For second parity area is provided, be divided into two or four bytes as the byte of the base unit of turbo stream.Then, be filled in each byte with the part position of a byte with such as 0 null data.The district that is filled with the null data becomes parity area.
The normal stream that service MUX 340 will receive is separately carried out multiplexing with the turbo stream of handling in reproducer 330.Along with the generation of dual TS, service MUX 340 offers randomizer unit 150 with dual TS.
Below with reference to the exemplary configurations of the transmitting element 200 of the digital broadcasting transmission system of the block diagram key-drawing 4 of Fig. 6.As shown in Figure 6, transmitting element 200 comprises second reed-solomon encoder 210, second interleaver 220, trellis encoder 230, MUX 240 and modulator 250.Second reed-solomon encoder 210 comes dual TS is encoded by parity byte being added to the dual TS that receives from deinterleaver 140.More specifically, second reed-solomon encoder 210 will insert first parity area that is provided by parity area generation unit 110 to the parity byte that dual TS calculates.
The dual TS that 220 pairs of second interleavers have the parity byte that is added by second reed-solomon encoder 210 interweaves.After second interleaver 220 interweaves dual TS, 230 pairs of dual TS codings of trellis encoder.After grid coding, MUX 240 adds dual TS to by section is synchronous and field synchronization and comes multiplexing dual TS.After multiplexing, the channel of the dual TS of modulator 250 modulation, and be the signal of RF channel strip with its up conversion.Therefore, via this channel dual TS is sent to various receiving systems.Though in Fig. 6, do not illustrate and not middle in all respects requirement, but transmitting element 200 also can comprise in addition and (for example is used for general parts that signal sends, the power amplifier (not shown) and the antenna (not shown) of the power of the modulation signal of amplification modulator 250), and can comprise and be used for the parts of in cable, the Internet and/or satellite system and medium, broadcasting, can realize digital broadcasting by described parts.
Below with reference to the exemplary configurations of the turbo processing unit 130 of the digital broadcasting transmission system of the block diagram key-drawing 4 of Fig. 7.With reference to Fig. 7, turbo processing unit 130 comprises byte/symbol converting unit 131, demodulation multiplexer 132, turbo encoder 133, turbo interleaver 134, turbo data multiplexer 135 and symbol/byte conversion unit 136.In others of the present invention, can omit byte/symbol converting unit 131, demodulation multiplexer 132, turbo data multiplexer 135 and symbol/byte conversion unit 136, perhaps use other parts to replace.
Byte/symbol converting unit 131 is symbol with the base unit of the dual TS that interweaves of first interleaver 120 from byte conversion.With reference to the table D5.2 of U.S. ATSC DTV standard (A/53), will be readily appreciated that the conversion of base unit from the byte to the symbol, the content of this standard is completely integrated by reference in this, for reference.
Demodulation multiplexer 132 is with the dual TS demultiplexing of symbolic unit, to recover turbo stream.133 pairs of detected turbo flowmeters of turbo encoder are calculated parity byte, and come the stream encryption to turbo by using the parity byte that calculates to fill second parity area.In this specific example, turbo encoder 133 is that unit carries out coding with each byte of turbo stream.However, it should be understood that and to use other unit.
The turbo stream of 134 pairs of convolutional encodings of turbo interleaver interweaves.In this example, turbo interleaver 134 is that unit interweaves with the position.The turbo stream of turbo data multiplexer 135 by will interweaving and normal stream be multiplexing to produce dual TS.More specifically, turbo data multiplexer 135 is constructed dual TS by turbo stream being filled into by the position before demodulation multiplexer 132 detections.Symbol/byte conversion unit 136 is byte with the base unit of dual TS from symbol transition.Table D5.2 with reference to U.S. ATSC DTV standard (A/53) will be readily appreciated that above-mentioned conversion, and disclosing of this standard is incorporated herein by reference, for reference.
The byte of table D5.2 is as follows to the example of symbol table:
Figure A20068003624500201
Exemplary configurations now with reference to the turbo encoder 133 of the turbo processing unit 130 of the block diagram key-drawing 7 of Fig. 8.According to Fig. 8, turbo encoder 133 comprises shift register and two adders with three parts D.Therefore, turbo encoder 133 is encoded to recursive system convolution (RSC) sign indicating number with the data convolution, parity check is inserted second parity area.
Fig. 9 to Figure 15 illustrates the exemplary configurations of dual TS of the digital broadcasting transmission system of Fig. 4.Fig. 9 illustrates the example of the turbo stream bag that is received by TS structural unit 300.For example, turbo stream bag can comprise 188 bytes.In this case, more specifically, turbo stream comprises: as 1 byte of head synchronously, the bags of 3 bytes identify the turbo data of (PID) and 184 bytes.
Figure 10 illustrates the example of the normal stream packet that is received by TS structural unit 300.Normal stream packet can comprise 188 bytes, more particularly, as 1 byte of head synchronously, self adaptation field (AF) head of 2 bytes, the null data of N byte and the general data of 182-N byte.The AF head is the district of record about the information of self adaptation field, so it comprises the information of position such as the self adaptation field, size etc.
Figure 11 illustrates the example of the dual TS (perhaps stream bag) that is produced by TS generation unit 300.In Figure 11, the part of the turbo of Fig. 9 stream bag is inserted in the null data of normal stream packet of Figure 10.In this embodiment, dual TS comprises 188 bytes, more particularly, as 1 byte of head synchronously, the null data of the AF head of the PID of 3 bytes, 2 bytes, N byte and as the general data of the 182-N byte of payload.The turbo data of the insertion shown in Figure 11 can be the parts of the turbo stream bag of Fig. 9.For example, the turbo data of the insertion of Figure 11 can be Fig. 9 synchronously, in PID and the turbo data at least one.
Figure 12 illustrates the dual TS that is produced by TS generation unit 300 according to another embodiment of the present invention.According to the embodiment shown in Figure 12, dual TS comprises a plurality of continuous bags.Bag to predetermined quantity is arranged the turbo data.That is to say that the turbo stream that Figure 12 illustrates 78 bags inserts in one 312 sections the bag of dual TS.Dual TS comprises with the turbo stream of 1 bag (188 byte) of 1: 3 ratio repeated arrangement and 3 normal stream of wrapping (188 byte) continuously.
Turbo streams at 70 bags are inserted under the situation of 312 sections bag of dual TS, with the dual TS of such formal construction: comprise the turbo stream of 1 bag (188 byte) and 3 continuously 4 bags of the normal stream of bag (188 byte) be repeated to arrange 70 times, 32 bags of remainder comprise normal stream packet.
Figure 13 illustrates the dual TS bag of being constructed by TS structural unit 300 according to another embodiment of the present invention.The turbo streams of 88 bags are inserted in the bag of 312 sections of one of dual TS.Construct dual TS by this way: 4 bags that comprise the normal stream of the turbo stream of 2 bags (188 byte) and 2 bags (188 byte) are repeated to arrange 10 times, and 4 bags that comprise the continuous normal stream of wrapping (188 byte) of the turbo stream of 1 bag (188 byte) and 3 are repeated arrangement with 1: 3 ratio as shown in figure 12.
Figure 14 illustrates according to another embodiment of the present invention by the dual TS of TS structural unit 300 structures, and this dual TS is the combining form of the dual TS shown in Figure 11 and Figure 12.Mode with 4 bags of repeated arrangement is constructed dual TS, described 4 bags comprise: the turbo stream of 1 bag (188 byte), the normal stream (wherein, SRS data and turbo data are inserted into the part of the AF of this normal stream packet) of 1 bag and the normal stream packet of 2 bags (188 byte).
Figure 15 illustrates the dual TS with the formal construction of 312 sections bag.As shown in figure 15, package informatin is included among the dual TS with turbo data and general data.Package informatin can be recorded in the Option Field.In this case, can specify the also position of fixed options field, thus not overlapping with the turbo data.In Figure 15, the possible length (byte) of " m " expression turbo data.
According to Figure 15, in the Option Field section of being arranged on 11,63,115,167,219,271 of the quantity (splicing counts down) of record macro block, and in the Option Field section of being arranged on 15,67,119 of recorded program clock reference (PCR).
When 312 sections were divided into the unit of 52 sections, the position of Option Field can be expressed as follows:
Program clock reference (PCR) (using 6 bytes): 52n+15, n=0;
Original program clock reference (OPCR) (using 6 bytes): 52n+15, n=1;
Self adaptation field extension length (using 2 bytes): 52n+15, n=2;
Transmission exclusive data length (using 5 bytes): 52n+15, n=3,4,5; And
The quantity of macro block (splicing counts down) (using 1 byte): 52n+15, n=0,1,2,3,4,5.
For example, in " transmission exclusive data length " section of being present in 171,223,275 wherein.Except the mode of above introduction, can also construct dual TS in every way, wherein, the turbo data are inserted into the null data outside the Option Field.In addition, can be according to the structure proportion of the structural adjustment turbo data of dual TS bag.
Figure 16 illustrates the block diagram that sends the digital broadcasting transmission system that replenishes reference sequences (SRS).Though the situation with SRS is described, it should be understood that the set that in others of the present invention, can realize other training sequence and/or given data.With reference to Figure 16, digital broadcasting transmission system comprises: TS structural unit 801, and it comprises the fill area that is used for the SRS data are inserted each bag of dual TS; Randomizer 803, dual TS is wrapped (below, abbreviate " bag " as) randomization; Replenish reference sequences and insert unit 805, the SRS data are inserted the fill area of randomized bag; Parity area generation unit 807 produces first district that is used to insert the parity check of carrying out error correction; First interleaver 809 carries out elementary interweaving to the bag that has produced first district; Turbo processing unit 811 carries out convolutional encoding and interweaves the turbo stream that is included in the elementary bag that interweaves; Deinterleaver 813 deinterleaves to the bag of being handled by turbo processing unit 811; Reed-Solomon (RS) encoder 815, first district that parity check is inserted the bag that deinterleaves; Second interleaver 817 carries out secondary interweaving to the bag that has inserted parity check; Trellis encoder 819 is carried out grid coding to the bag that interweaves; MUX 823, carry out multiplexing to the bag of grid coding synchronously by interpolation; And modulator 825, multiplexing bag is carried out Channel Modulation and with its transmission.In addition, also can comprise the backward compatibility parity generator 821 that generation can compatible parity check.
The known SRS data that are used for synchronous and/or channel equalization can be inserted into the dual TS bag that is received by digital broadcast transmission, are described in detail with reference to Fig. 9.TS structural unit 801 receives normal stream and turbo stream, and constructs dual TS bag.According to embodiments of the invention, dual TS bag can comprise the fill area that is used for inserting therein the known SRS data that are used for synchronous and/or channel equalization.Can make up TS structural unit 801 according to the mode identical with the top mode of explaining with reference to Fig. 5, therefore, for the sake of simplicity, with the description of omitting to it.If TS structural unit 801 comprises first reed-solomon encoder 310 as shown in Figure 5 shown in the embodiment, then for the ease of explaining that the reed-solomon encoder 815 of Figure 16 will be called as second reed-solomon encoder.
Use description to insert therein known being used for synchronously and/or the fill area of the SRS data of channel equalization now.Fill area can be a part that comprises the bag of head and payload.More particularly, described bag also comprises self adaptation field (AF).Fill area as the part of AF is placed as not overlapping with the Option Field that is included among the AF.Option Field comprises: program clock reference (PCR), be used for receiver demodulator synchronously; Original PCR (OPCR) is used at receiver record, reservation and playback of programs; Four circuit blocks; The quantity of macro block (splicing counts down), expression comprises the quantity of the continuous macro block of a Cr piece and a Cb piece; Transmission exclusive data length, expression is used for the length of the text data of teletext broadcast; And AF extension length.
According to embodiments of the invention, the AF of bag also can comprise the fill area that is used for inserting therein data, and described data are used for initialization trellis encoder 819 (will be described later).Randomizer 803 will comprise the bag randomization of fill area.
SRS inserts the fill area that unit 805 inserts the SRS data randomized bag.Here, the SRS data are reference signals,, have the particular sequence data of the pattern of being scheduled to by transmitter and receiver that is.Because the SRS data are different with the general payload data of transmitting-receiving reference signal mode, therefore, can change places from the general containing that will be sent out and detect the SRS data, thereby be used for the synchronous and/or channel equalization of receiver.Can be controlled at by predetermined control signal and insert the SRS data in the fill area.
Parity area generation unit 807 produces the parity check that is used for being used for error correction and inserts first district of wrapping, and has inserted the SRS data in described bag.As shown, first district is used for the parity check of being added by RS encoder 815 is inserted wherein.The bag that 809 pairs of first interleavers have produced parity area carries out elementary interweaving.The turbo stream that 811 pairs of turbo processing units are included in the elementary bag that interweaves carries out convolutional encoding, and the turbo stream after the convolutional encoding is interweaved.Turbo processing unit 811 is configured to as shown in Figure 7, and operates in the mode identical with the mode of reference Fig. 7 description.
Deinterleaver 813 deinterleaves from the bag of turbo processing unit 811 outputs.RS encoder 815 adds parity check to the dual TS that deinterleaves.According to embodiments of the invention, insert parity check to correct the mistake that produces by channel at the place, first district of the bag that has inserted the SRS data with the RS encoder 815 of the formal construction of cascaded code.The bag that 817 pairs of second interleavers have inserted parity check carries out secondary interweaving.819 pairs of secondary bags that interweaved of trellis encoder carry out grid coding.
According to embodiments of the invention, can be just to being included in before SRS data in the bag that interweaves carry out grid coding, trellis encoder 819 is initialized as predetermined value.Because the SRS data are so need carry out initialization.More particularly, trellis encoder 819 can produce different coding results to identical data according to the data of previous coding.Therefore, the result of the grid coding of SRS data can be according to the data variation before the SRS data, and in this case, receiver can not be distinguished the SRS data.In order to address this problem, just before the grid coding of SRS data, trellis encoder 819 is initialized as predetermined value.In other words, just before the SRS data are carried out grid coding, predetermined value is carried out grid coding.
Trellis encoder 819 according to the embodiment of the invention can comprise: i) general modfel, the bag that is interweaved by interleaver is carried out grid coding; Ii) initialize mode is with trellis encoder 819 initialization; Iii) the parity check alternating pattern can compatible parity check carry out grid coding to what all or part of parity check of being used by RS encoder 815 substituted.For this reason, trellis encoder 819 can receive control signal from the control signal generating unit (not shown), and described control signal is worked under general modfel, initialize mode or parity check alternating pattern.
When receiving the control signal of order initialize mode when trellis encoder 819 is worked under general modfel, trellis encoder 819 is worked under initialize mode.If receive the control signal of order parity check alternating pattern when working under general modfel, then trellis encoder 819 is worked under the parity check alternating pattern.The control signal generating unit (not shown) that the position and being used for of can be from the position of the SRS data of knowing insertion, being used for the insertion value of initialization trellis encoder 819 substitutes position that can compatible parity check provides control signal.
Backward compatibility parity generation unit 821 receives by RS encoder 815 and has added the bag of parity check and the bag of being encoded by trellis encoder 819, and can compatible parity check based on the packet generation that receives.More particularly, backward compatibility parity generation unit 821 comprises: the symbol decoder (not shown) receives the bag by trellis encoder 819 codings, and the bag of sign map is converted to the byte form; The deinterleaver (not shown) deinterleaves the bag of decoding; And the memory (not shown), use the bag that deinterleaves to replace at least a portion of the bag of reception, and store the bag that deinterleaves.Preferably, the memory (not shown) can only replace and store the different piece between bag that receives and the bag that deinterleaves.For this reason, for example backward compatibility parity generation unit 821 can receive predetermined control signal from the control signal generating unit (not shown).The memory (not shown) can comprise: RS encoder (not shown), can add in the bag that is stored in the memory in compatible parity check; The interleaver (not shown), to added can compatible parity check bag interweave; And the symbol encoder (not shown), the bag of byte form is carried out sign map, so that the bag that will interweave sends to trellis encoder 819.
MUX 823 adds the bag of the next multiplexing grid coding of bag of grid coding to by section is synchronous and field synchronization.825 pairs of modulators have added section bag synchronous and field synchronization and have carried out Channel Modulation, with the signal that is transformed to the RF channel strip of wrapping of modulation, and the signal of transmission conversion.
Figure 17 to Figure 23 illustrates the structure according to the TS bag that comprises SRS of the embodiment of the invention.Figure 17 illustrates the turbo stream bag that is received by TS structural unit 801.Turbo stream bag (188 byte) comprising: as 1 byte of head synchronously, the PID of 3 bytes and the turbo data of 184 bytes.Figure 18 illustrates and comprises and be used for inserting known SRS signal to carry out the normal stream packet of synchronous fill area at the TS structural unit.Normal stream packet (188 byte) comprising: as 1 byte of head synchronously, the null data of the fill area of the AF head of the PID of 3 bytes, 2 bytes, S byte, N byte and as the general data of the 182-N-S byte of payload.Figure 19 illustrates according to being used for comprising of the embodiment of the invention and inserts known SRS signal to carry out the dual TS bag of synchronous fill area at the TS structural unit.More particularly, in Figure 19, the part of the turbo of Figure 17 stream bag is inserted in the null data of normal stream packet of Figure 11 B, and the SRS data are inserted in the fill area.In this embodiment, dual TS comprises 188 bytes, more particularly, comprising: as 1 byte of head synchronously, the null data of the SRS data of the AF head of the PID of 3 bytes, 2 bytes, S byte, N byte and as the normal stream data of the 182-N-S byte of payload.
Figure 20 illustrates and comprises that according to another embodiment of the present invention being used for inserting known SRS signal at the TS structural unit wraps with the dual TS that carries out synchronous fill area.Different with the dual TS bag of Figure 11, the turbo stream of 78 bags is inserted in one 312 sections the bag of dual TS.Construct described dual TS by this way: turbo stream and 34 bags that wrap the normal stream of (188 byte) continuously of comprising 1 bag (188 byte) with 1: 3 ratio repeated arrangement.On the other hand, when the turbo of 70 bags stream is inserted in 312 sections of bag of dual TS, construct described dual TS by this way: comprise that the turbo stream of 1 bag (188 byte) and 34 bags that wrap the normal stream of (188 byte) continuously are repeated to arrange 70 times, 32 remaining bags comprise normal stream packet.
Figure 21 illustrates and comprises that according to another embodiment of the present invention being used for inserting known SRS signal at the TS structural unit wraps with the dual TS that carries out synchronous fill area.Different with the dual TS bag of Figure 11, the turbo stream of 88 bags is inserted in one 312 sections the bag of dual TS.Construct described dual TS by this way: 4 bags that comprise the normal stream of the turbo stream of 2 bags (188 byte) and 2 bags (188 byte) are repeated to arrange 10 times, and 4 bags that comprise the continuous normal stream of wrapping (188 byte) of the turbo stream of 1 bag (188 byte) and 3 are repeated arrangement with 1: 3 ratio as shown in figure 12.
Figure 22 illustrates and comprises that according to another embodiment of the present invention being used for inserting known SRS signal at the TS structural unit wraps with the dual TS that carries out synchronous fill area, and it is the combining form of the dual TS bag shown in Figure 19 and Figure 20.Construct described dual TS in the mode of 4 bags of repeated arrangement, described 4 bags comprise: the normal stream packet of the normal stream of the turbo of 1 bag (188 byte) stream, 1 bag (wherein, SRS data and turbo data are inserted in the part of AF of normal stream packet) and 2 bags (188 byte).
Figure 23 illustrates to be used for inserting known SRS signal to carry out the dual TS bag of synchronous fill area at the TS structural unit comprising of the form of the bag of the section shown in Figure 19.In one 312 sections the bag of dual TS, the turbo data are inserted into the non-Option Field part of the data that comprise Option Field.In Figure 23, the possible length (byte) of " k " expression SRS data.In addition, the turbo data are inserted into after the SRS data.Here, the possible length (byte) of " m " expression turbo data.
When according to 52 sections being unit when cutting apart 312 sections, the position of Option Field can be expressed as follows:
Program clock reference (PCR) (using 6 bytes): 52n+15, n=0;
Original program clock reference (OPCR) (using 6 bytes): 52n+15, n=1;
Self adaptation field extension length (using 2 bytes): 52n+15, n=2;
Transmission exclusive data length (using 5 bytes): 52n+15, n=3,4,5; And
The quantity of macro block (splicing counts down) (using 1 byte): 52n+15, n=0,1,2,3,4,5.
For example, wherein " transmission exclusive data length " is present in n=3, on 4 or 5 the position.
Except the mode of introducing above, can also construct dual TS in every way, in described dual TS, the turbo data are inserted in the null data outside the Option Field.In addition, can be according to the structure proportion of the structural adjustment turbo data of dual TS bag.
Figure 24 is the block diagram that illustrates according to the digital broadcast receiving system of the embodiment of the invention.With reference to Figure 24, digital broadcast receiving system comprises: modulator 1001, equalizer 1003, first processor 1050 and second processor 1060.Digital broadcast receiving system receives dual TS, to the dual TS demodulation that receives, the dual TS of demodulation is carried out equilibrium, the normal stream of the dual TS of equilibrium is carried out the Viterbi decoding and deinterleaved, the normal stream that deinterleaves is carried out the RS decoding, the normal stream of RS decoding is gone randomization.Digital broadcast receiving system carries out the turbo decoding to the turbo stream of the dual TS of equilibrium and deinterleaves, and the turbo stream that deinterleaves is carried out the RS decoding, and the turbo stream of RS decoding is gone randomization.The baseband signal of the dual TS of 1001 pairs of receptions of modulator is carried out synchronous detecting and demodulation.The channel distortion that equalizer 1003 is produced by the multipath of channel to the dual TS of demodulation compensation, thus remove interference between the symbol that receives.
First processor 1050 comprises: Viterbi decoder 1017, deinterleaver 1021, RS decoder 1023 and remove randomizer 1025.The normal stream of the dual TS of 1017 pairs of equilibriums of Viterbi decoder is carried out error correction, and the symbol of error correction is decoded, thus the output symbol bag.Can rearrange the decoding bag of distribution by deinterleaver 1021.The bag that 1023 pairs of RS decoders deinterleave is carried out error correction.Go 1025 pairs of bags of randomizer to go randomization by 1023 error correction of RS decoder.Therefore, recover the normal stream of dual TS.
Second processor 1060 comprises: turbo decoder 1005, second deinterleaver 1009, RS decoder 1011, remove randomizer 1013 and turbo demodulation multiplexer 1015.Yet, it is to be understood that second processor 1060 need not comprise the parts that all illustrate aspect all of the present invention, such as turbo demodulation multiplexer 1015.The turbo stream of the dual TS of 1005 pairs of equilibriums of turbo decoder carries out the turbo decoding.Carry out trellis decode by turbo stream to the dual TS of equilibrium, turbo stream to trellis decode deinterleaves and convolution decoder, the turbo stream of convolution decoder is carried out frame formatting carry out the turbo decoding, thereby the turbo circulation of sign format is changed to the byte form.
Simultaneously, turbo decoder 1005 can carry out trellis decode to the normal stream of the dual TS of equilibrium.Use symbol-byte converter (not shown) that the normal stream of trellis decode is converted to the byte form from sign format.Normal stream to conversion deinterleaves to remove parity check.The normal stream of removing parity check is gone randomization, thereby recover normal stream.
The turbo stream of 1009 pairs of turbo decodings of deinterleaver deinterleaves.RS decoder 1011 is removed the parity check of adding the turbo stream that deinterleaves to.Go 1013 pairs of turbo streams of removing parity check of randomizer to go randomization.Turbo demodulation multiplexer 1015 will remove randomized turbo stream demultiplexing.The turbo stream here can receive by demultiplexing and be formatted as turbo data in the turbo stream of frame form.
Figure 25 is the block diagram of turbo decoder of the digital broadcast receiving system of Figure 24.With reference to Figure 24 and Figure 25, turbo decoder 1005 comprises: grid decoder 2001, turbo deinterleaver 2003, turbo decoder 2005, turbo interleaver 2007, frame formatter 2009 and symbol/byte conversion unit 2011.
The dual TS of 2001 pairs of equilibriums of grid decoder carries out trellis decode.According to this embodiment, grid decoder 2001 can carry out trellis decode to the turbo stream of dual TS, also can carry out trellis decode to the soft-decision turbo stream that interweaves through turbo.The turbo stream of 2003 pairs of trellis decode of turbo deinterleaver deinterleaves.The turbo stream that 2005 pairs of turbo decoders deinterleave carries out convolution decoder, thus output soft-decision or hard decision." soft-decision " is meant the value of the information that comprises the tolerance that flows about turbo.For example, when the tolerance of turbo stream is " 1 " and as the tolerance result of turbo stream during for " 0.8 ", export soft-decision-value " 0.8 ".When the tolerance result of turbo stream is " 1 ", the output hard decision, that is, and turbo stream.
2007 pairs of hard decision turbo streams through convolution decoder of turbo interleaver interweave.2009 couples of hard decision turbo with the corresponding convolution decoder of frame of dual TS of frame formatter flow to row formatization.
Can easily understand symbol/byte converter 2011 is converted to the turbo stream of frame formatting the byte form from sign format operation by table D5.2 with reference to above-mentioned " ATSC DTV standard (A/53) ".
Figure 26 is the flow chart of example of signal processing method that is used for the digital broadcasting transmission system of key-drawing 6.With reference to Figure 26 and Fig. 6, TS structural unit 300 receives normal stream and turbo stream, generation is used for parity check is inserted second district of the turbo stream that receives, and the normal stream that receives is multiplexing with the turbo stream that has produced second district, thereby constructs dual TS (S1201).Randomizer 150 will be from the dual TS randomization (S1203) of TS structural unit 300 outputs.Parity area generator 110 produces first district (S1205) that is used for the parity check that is used for error correction is inserted randomized dual TS.The dual TS that 120 pairs of first interleavers have produced parity area carries out elementary interweaving (S1207), the turbo stream that 130 pairs of turbo processing units are included among the elementary dual TS that interweaves carries out convolutional encoding, and to the turbo stream of convolutional encoding interweave (S1209).140 pairs of deinterleavers are from the dual TS of turbo processing unit 130 outputs deinterleave (S1211).RS encoder 210 inserts parity check in first district (S1213) of the dual TS that deinterleaves.
The dual TS that 220 pairs of second interleavers have inserted parity check carries out secondary interweaving (S1215).230 couples of secondary dual TS that interweave of trellis encoder carry out grid coding (S1217).MUX 240 is by adding section synchronously and the dual TS (S1219) of the multiplexing grid coding of field synchronization.250 couples of multiplexing dual TS of modulator carry out Channel Modulation, are the signal of radio frequency (RF) channel strip with dual TS up conversion, the concurrent signal (S1221) of serving conversion.
Figure 27 is the flow chart of example of signal processing method that is used for the turbo processing unit of key-drawing 7.With reference to Figure 27 and Fig. 7, byte-signal converter 131 is sign format (S1301) with the elementary dual TS that interweaves from the byte formal transformation.The dual TS demultiplexing that TS demodulation multiplexer 132 will be converted to sign format is normal stream and turbo stream (S1303).The turbo stream of the dual TS of 133 pairs of demultiplexings of turbo encoder carries out convolutional encoding (S1305).
By convolutional encoding, produced parity check in addition, and be inserted into second district of turbo stream for turbo stream.The turbo stream of 134 pairs of convolutional encodings of turbo interleaver interweave (S1307).The turbo stream and the normal stream of demultiplexing that 135 pairs of turbo data multiplexers interweave carried out multiplexing, thereby constructs dual TS (S1309).Symbol-byte converter 136 is converted to byte form (S1311) with dual TS from sign format.
Figure 28 is the flow chart that is used for explaining in the example of the signal processing method of the digital broadcast receiving system of Figure 24.With reference to Figure 28 and Figure 24, demodulator 1001 detects and demodulation synchronous (S1401) according to synchronous (sync) of the baseband signal of the dual TS that adds reception to.The channel distortion that equalizer 1003 is produced by the multipath of channel to the dual TS of demodulation compensation, thus remove interference (S1403) between the symbol that receives.
The normal stream of the dual TS of 1017 pairs of equilibriums of Viterbi decoder of first processor 1050 is carried out error correction, the symbol of error correction decoded, and output symbol bag (S1405).Rearrange the bag (S1407) of the decoding of distribution by deinterleaver 1021.The bag that 1023 pairs of RS decoders deinterleave is carried out error correction (S1409).Go 1025 pairs of bags of randomizer to go randomization (S1411) by 1023 error correction of RS decoder.Therefore, recover the normal stream of dual TS.
The turbo stream of the dual TS of 1005 pairs of equilibriums of turbo decoder of second processor 1060 carries out turbo decoding (S1413).Carry out trellis decode by turbo stream to the dual TS of equilibrium, turbo stream to trellis decode deinterleaves and convolution decoder, the turbo stream of convolution decoder is carried out frame formatting carry out the turbo decoding, thereby turbo stream is converted to the byte form from sign format.The turbo stream of the 1009 couples of turbo of deinterleaver decoding deinterleave (S1415).RS decoder 1011 is removed the parity check (S1417) of adding the turbo stream that deinterleaves to.Go 1013 pairs of turbo streams of removing parity check of randomizer to go randomization (S1419).Turbo demodulation multiplexer 1015 will remove randomized turbo stream demultiplexing (S1421).The turbo stream here can receive by demultiplexing and be formatted as turbo data in the turbo stream of frame form.
Figure 29 is the flow chart of example of signal processing method that is used for explaining the turbo decoder of Figure 25.With reference to Figure 29 and Figure 25, the dual TS of 2007 pairs of equilibriums of grid decoder of turbo decoder 1005 carries out trellis decode (S1501), the turbo stream of 2003 pairs of trellis decode of turbo deinterleaver deinterleave (S1503), the turbo stream that 2005 pairs of turbo decoders deinterleave carries out convolution decoder (S1507), thus output soft-decision or hard decision.Here, soft-decision is meant the value of the information that comprises the tolerance that flows about turbo.For example, when the tolerance of turbo stream is " 1 " and as the tolerance result of turbo stream during for " 0.8 ", export soft-decision-value " 0.8 ".When the tolerance result of turbo stream is " 1 ", the output hard decision, that is, and turbo stream.The soft-decision of output interweaves (S1505) by turbo interleaver 2007, and carries out trellis decode with error correction.Therefore, repeat above-mentioned processing, the tolerance that flows up to turbo becomes " 1 " with the output hard decision.Do not provide the details of turbo coding itself, because they are well known in the art.In addition, the present invention is not limited to the turbo coding, and each side of the present invention can be used the coding of other type to replace the turbo coding or use the coding of other type except the turbo coding.
Frame formatter 2009 will flow to row formatization (S1509) with the hard decision turbo of the corresponding convolution decoder of frame of dual TS.Symbol-byte converter 2011 can be converted to byte form (S1511) from sign format with the turbo stream of frame formatting.

Claims (33)

1, a kind of method of handling digital broadcast signal comprises:
Prepare first district, described first district is used for comprising that the dual transmission stream (TS) that flows multiplexing normal stream with turbo carries out the parity check insertion;
The dual TS that comprises first district is interweaved;
Detect turbo stream from the dual TS that interweaves, detected turbo stream is encoded specially, and the turbo stream of coding is filled into dual TS so that carry out the turbo processing;
The dual TS that turbo was handled deinterleaves;
The dual TS that the turbo that transmission deinterleaves handled;
Receive the dual TS that sends;
The dual TS of the described reception of demodulation;
Dual TS to demodulation carries out equilibrium;
The normal stream of the dual TS of equilibrium is decoded to recover the general data bag; And
The turbo stream of the dual TS of equilibrium is decoded to recover the turbo packet.
2, the method for claim 1 also comprises: before preparing first district, prepare to be used for turbo stream is carried out second district that parity check is inserted; And carry out the multiplexing dual TS that produces by having the turbo stream and the normal stream that are used for carrying out therein second district that parity check inserts.
3, the step that the method for claim 1, wherein detects turbo stream comprises:
By the dual TS demultiplexing that interweaves being detected turbo stream;
Being inserted into parity check by the parity check that will be used for detected turbo stream inserts second district of creating and comes detected turbo stream encryption;
Turbo stream to coding interweaves; And
Carry out the multiplexing dual TS that produces by the turbo stream that will interweave with normal stream.
4, method as claimed in claim 3, wherein, the step that detects turbo stream also comprises:
The base unit of the dual TS that will interweave is a symbol from byte conversion; And
Is byte with the base unit of the dual TS that produces from symbol transition.
5, the step that the method for claim 1, wherein sends the dual TS deinterleave comprises:
Parity check by the dual TS that will be used to deinterleave is inserted into and is used for first district that parity check inserts and encodes;
Dual TS to coding interweaves;
The dual TS that interweaves is carried out grid coding;
Undertaken multiplexing by synchronizing signal being added to the dual TS that grid coding crosses; And
Multiplexing dual TS is carried out Channel Modulation and sends the stream that obtains.
6, the method for claim 1, wherein:
Dual TS comprises the field that comprises a plurality of continuous bags, and the Option Field of the package informatin of recording scheduled type is arranged on the bag in the precalculated position that is arranged in described, and not overlapping with turbo stream; And
Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
7, the method for claim 1, wherein:
Dual TS comprises the field that comprises a plurality of continuous bags; And
Turbo stream and normal stream are arranged in respectively in described a plurality of bag.
8, the step of the method for claim 1, wherein normal stream being decoded comprises:
Decoding wherein, is carried out error correction to the normal stream of the dual TS of equilibrium, and the normal stream of error correction is decoded;
Normal stream by the viterbi decoder decode is deinterleaved;
The mistake of the normal stream that correction deinterleaves; And
By going randomization to recover the general data bag to the normal stream of error correction.
9, the method for claim 1, wherein the step of decoding turbo stream comprises:
Turbo stream to the dual TS of equilibrium carries out the turbo decoding;
Turbo diffluence to the turbo decoding interweaves;
The turbo stream that deinterleaves is carried out the Reed-Solomon decoding; And
Turbo stream to the Reed-Solomon decoding goes randomization.
10, the method for claim 1 also comprises:
To replenish the fill area that reference sequences inserts dual TS, described dual TS comprises and the multiplexing normal stream of turbo stream; And
Use is from fill area additional reference sequences of fetching and the additional reference sequences that the is stored in receiver dual TS of equalizing demodulation recently mutually.
11, method as claimed in claim 10 also comprises: normal stream and turbo stream is multiplexing producing dual TS, and in dual TS, prepare fill area.
12, method as claimed in claim 11 also comprises: before inserting additional reference sequences, the dual TS with fill area is carried out randomization.
13, method as claimed in claim 11 wherein, comprises the multiplexing step of normal stream and turbo stream: turbo stream is prepared to be used for second district that parity check is inserted.
14, method as claimed in claim 10, wherein:
The form of dual TS is the frame that comprises a plurality of continuous bags, and each bag comprises the self adaptation field; And
Fill area is at least a portion of self adaptation field.
15, method as claimed in claim 14, wherein, dual TS comprises with predetermined inter-packet gap and is arranged on turbo stream in the bag of frame.
16, method as claimed in claim 14, wherein:
Dual TS comprises: Option Field, be arranged on the bag in a precalculated position that is arranged in, and not overlapping with turbo stream;
Fill area is at least a portion of the self adaptation field except Option Field; And
Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
17, a kind of digit broadcasting system comprises:
The transmission source comprises:
The parity area generation unit prepares to be used for first district that parity check is inserted to comprising with the dual transmission stream (TS) of the multiplexing normal stream of turbo stream;
First interleaver interweaves to the dual TS that sends from the parity area generation unit;
The turbo processing unit detects turbo stream from the dual TS that interweaves, and the turbo stream that detects is encoded specially handle to carry out turbo, and the turbo stream of coding is filled into dual TS;
Deinterleaver deinterleaves to the dual TS of trubo processing unit processes; And
Transmitting element is sent in the dual TS that deinterleaver is handled; And
The digital broadcasting transmitter system comprises:
Demodulator receives dual transmission stream (TS) and the dual TS that receives is carried out demodulation;
Equalizer carries out equilibrium to the dual TS of demodulation;
First processor is decoded and is exported the general data bag the normal stream of the dual TS of equilibrium; And
Second processor is decoded and is exported the turbo packet the turbo stream of the dual TS of equilibrium.
18, digit broadcasting system as claimed in claim 17, wherein:
First processor comprises:
The viterbi decoder carries out error correction to the normal stream of the dual TS of equilibrium, and the normal stream of error correction is decoded;
First deinterleaver deinterleaves to the normal stream by the viterbi decoder decode;
First Read Solomon decoder is corrected in the mistake of the normal stream that first deinterleaver handles; And
Remove randomizer, by going randomization to recover the general data bag to the normal stream of error correction; And
Second processor comprises:
The turbo decoder is decoded to the turbo stream of the dual TS of equilibrium;
Second deinterleaver, the turbo stream that turbo is decoded deinterleaves;
Second Read Solomon decoder is decoded to the turbo stream that deinterleaves; And
Remove randomizer, the turbo stream that Reed-Solomon is decoded goes randomization.
19, digit broadcasting system as claimed in claim 17, wherein:
Dual TS comprises the field that comprises a plurality of continuous bags, and turbo stream and normal stream are arranged in respectively in described a plurality of bag.
20, digit broadcasting system as claimed in claim 17, wherein:
Dual TS comprises the field that comprises a plurality of continuous bags;
The Option Field of the package informatin of recording scheduled type is arranged on the bag in the precalculated position that is arranged in described, and not overlapping with turbo stream; And
Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits at least one in exclusive data length and the self adaptation field extension length.
21, digit broadcasting system as claimed in claim 17 also comprises:
The TS structural unit is by flowing the multiplexing dual TS that produces with normal stream and turbo; And
The randomization unit carries out randomization to the dual TS that produces in the TS structural unit, and the dual TS that will produce offers the parity area generation unit.
22, digit broadcasting system as claimed in claim 21, wherein, the TS structural unit comprises:
Reproducer is prepared to be used for turbo stream is carried out second district that parity check is inserted; And
Service multiplex will be multiplexing with normal stream at the turbo stream that reproducer is handled, and export the stream that obtains.
23, digit broadcasting system as claimed in claim 22, wherein, the TS structural unit also comprises:
First reed-solomon encoder is encoded to the turbo stream that receives from the outside; And
Pre-interleaver interweaves and the stream that will obtain offers reproducer to the turbo stream of coding.
24, digit broadcasting system as claimed in claim 22, wherein, the turbo processing unit comprises:
Demodulation multiplexer, the dual TS demultiplexing that will interweave at first interleaver, and detect turbo stream;
The turbo encoder inserts by the parity check of the turbo stream that will be used for being detected by demodulation multiplexer and to be used for second district that parity check inserts and to come turbo stream is encoded;
The turbo interleaver interweaves to the turbo stream of crossing in the turbo coder processes; And
The turbo data multiplexer will be by flowing at the turbo that the turbo interleaver was handled and carrying out the multiplexing dual transmission stream (TS) of constructing in the normal stream of demodulation multiplexer demultiplexing.
25, digit broadcasting system as claimed in claim 17, wherein:
The transmission source also comprises: the additional reference signal inserts the unit, receives dual TS, and the fill area that provides among the dual TS is provided the additional reference signal; And
Equalizer uses the additional reference signal that extracts from fill area recently the dual TS of demodulation to be carried out equilibrium mutually with additional reference signal being stored in receiver.
26, digit broadcasting system as claimed in claim 25 also comprises:
Transport stream (TS) structural unit by normal stream and turbo stream are carried out the multiplexing dual TS that produces, and is prepared fill area in dual TS; And
The randomization unit carries out randomization to the dual TS that provides from the TS structural unit, and randomized stream is offered additional reference signal insertion unit.
27, digit broadcasting system as claimed in claim 26, wherein, the TS structural unit comprises:
Reproducer is prepared to be used for turbo stream is carried out second district that parity check is inserted; And
Service multiplex, turbo stream and the normal stream that will handle at reproducer carried out multiplexing, prepares fill area, and the stream that obtains of output.
28, digit broadcasting system as claimed in claim 27, wherein, the TS structural unit also comprises:
First reed-solomon encoder is carried out the Reed-Solomon coding to the turbo stream that receives from the outside; And
Pre-interleaver interweaves and the stream that will obtain offers reproducer to the turbo stream of coding.
29, digit broadcasting system as claimed in claim 25, wherein, dual TS comprises the frame that comprises a plurality of continuous bags, each bag comprises the self adaptation field, and
Fill area is at least a portion of self adaptation field.
30, digit broadcasting system as claimed in claim 29, wherein:
Dual TS comprises Option Field, and described Option Field is arranged on the bag of certain position that is arranged in the self adaptation field, and is not overlapping with turbo stream;
Fill area is at least a portion of the self adaptation field except Option Field; And
Option Field comprises that the splicing of the quantity of program clock reference (PCR), original program clock reference (OPCR), indication macro block counts down, transmits exclusive data length and/or self adaptation field extension length.
31, method as claimed in claim 6, wherein, described comprises 312 bags, when 312 bags were divided into the unit of per 52 bags, the position of Option Field in the field was as follows:
Program clock reference (PCR): 52n+15, n=0;
Original program clock reference (OPCR): 52n+15, n=1;
Self adaptation field extension length: 52n+15, n=2;
Transmission exclusive data length: 52n+15, n=3,4,5; And
Splicing counts down: 52n+19, n=0,1,2,3,4,5.
32, digit broadcasting system as claimed in claim 20, wherein, described comprises 312 bags, when 312 bags were divided into the unit of per 52 bags, the position of Option Field in the field was as follows:
Program clock reference (PCR): 52n+15, n=0;
Original program clock reference (OPCR): 52n+15, n=1;
Self adaptation field extension length: 52n+15, n=2;
Transmission exclusive data length: 52n+15, n=3,4,5; And
Splicing counts down: 52n+19, n=0,1,2,3,4,5.
33, digit broadcasting system as claimed in claim 30, wherein, described comprises 312 bags, when 312 bags were divided into the unit of per 52 bags, the position of Option Field in the field was as follows:
Program clock reference (PCR): 52n+15, n=0;
Original program clock reference (OPCR): 52n+15, n=1;
Self adaptation field extension length: 52n+15, n=2;
Transmission exclusive data length: 52n+15, n=3,4,5; And
Splicing counts down: 52n+19, n=0,1,2,3,4,5.
CN200680036245.3A 2005-10-11 2006-10-11 Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof Active CN101278562B (en)

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US72478605P 2005-10-11 2005-10-11
US60/724,786 2005-10-11
KR1020050113662A KR100756036B1 (en) 2005-10-11 2005-11-25 Method for robust transmission of Digital broadcasting transport stream and Digital broadcasting transmission/reception system and signal processing method thereof
KR10-2005-0113662 2005-11-25
US11/416,253 2006-05-03
US11/416,253 US8619876B2 (en) 2005-10-11 2006-05-03 Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof
PCT/KR2006/004086 WO2007043803A1 (en) 2005-10-11 2006-10-11 Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof

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CN 200910179529 Division CN101686311B (en) 2005-10-11 2006-10-11 A digital broadcasting transmission and reception system, and a signal processing method thereof
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