CN1622606A - Digital E8-VSB reception system and E8-VSB data demultiplexing method - Google Patents
Digital E8-VSB reception system and E8-VSB data demultiplexing method Download PDFInfo
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Abstract
The invention discloses an enhanced 8-VSB reception system and E8-VSB data demultiplexing method, by which an E8-VSB signal can be stably received as well as a previous ATSC 8VSB signal. Herein, the enhanced data are coded at 1/2 code rate and 1/4 code rate in the new E8-VSB transmission system compatible with the conventional ATSC 8VSB system, respectively. The 1/2 and 1/4 enhanced data are multiplexed by 164-byte packet unit according to the previously determined multiplexing format and further pre-processed to output as the format of the MPEG transport packet. And, the pre-processed enhanced data and the main data are multiplexed again by 188-byte packet unit according to the previously determined multiplexing format. The E8-VSB map information, which was inserted in the field sync section in the E8-VSB transmission system to be transmitted, is extracted to generate the information indicating the attributes of the respective E8-VSB data. The normal data, 1/2 enhanced data, and 1/4 enhanced data are separated from each other to be decoded in the channel decoder.
Description
It is 10-2003-0083688, the applying date to be the priority of the korean patent application on November 24th, 2003 that the application requires application number, this formerly application documents at this as additional reference paper.
Technical field
The present invention relates to enhancement mode 8-VSB receiving system and E8-VSB data demultiplexing method, by this, a plurality of with different coding rate coding and with can be received with the enhanced data that transmits by the mpeg data of previous ATSC 8VSB system coding is multiplexed.
Background technology
In general, in nineteen ninety-five, the U.S. (U.S.A) has adopted ATSC (advanced television system committee) 8VSB (residual sideband) transfer system to be used as the received terrestrial digital broadcasting standard, and broadcasts since 1998.Republic of Korea adopts ATSC 8VSB transfer system standard, and begins experimental broadcast May nineteen ninety-five.On August 31st, 2000, experimental broadcast is activated to detect broadcast system, and from October calendar year 2001, conventional broadcasting is by the broadcasting of big broadcasting station.
Fig. 1 is the block diagram according to the ATSC 8VSB transfer system of prior art.
Referring to Fig. 1, the MPEG video/audio data of 101 pairs of inputs of ATSC data random generator carries out randomization to output to Reed-Solomon encoder 102.102 pairs of randomized data of this Reed-Solomon encoder are carried out the Reed-Solomon coding, add the parity code of 20 bytes on coded data, then corresponding data are outputed to data interleaver (datainterleaver) 103.103 pairs of data interleaver from the data of Reed-Solomon encoder 102 outputs interlock (interleaving) handle to change the sequence of data, then intercrossed data (interleaved data) is outputed to trellis encoder (trellis coder) 104.Trellis encoder 104 transforms to symbol with intercrossed data from byte, then transform data (converted data) is carried out trellis code coding (trellis coding) to output to multiplexer (multiplexer) 105.Multiplexer carries out multichannel with 105 pairs of trellis code coded identification row of synchronizing signal (trellis-coded symbol column) to be handled to output to pilot tone insertion device (pilot inserter) 106.Pilot tone is inserted device 106 pilot signal is added to multiplexed symbol rank (multiplexed symbol column) to output to VSB modulator (VSB modulator) 107.VSB modulator 107 will be modulated to the 8VSB signal of midband (intermediate frequency band) from the symbol rank that pilot tone is inserted device 106 output, to output to RF converter (RF converter) 108.RF converter 108 is that the RF band signal is to transmit by antenna with the midband 8VSB signal transformation that receives.
The ATSC 8VSB transfer system of developing for HD (high definition) broadcasting transmits MPEG-2 digital video and dolby digital sound (Dolby digital sound).Recently, owing to the extensive use of the Internet in the whole world, thus the rising of the demand of interactive broadcasting (interactive broadcast), and require various supplemental services.In order to satisfy these demands, people have done many effort to develop the supplemental services that separation can be provided and the system of MPEG-2 digital video and dolby digital sound on same channel.
In this case, different with common video/voice data, auxiliary data should transmit with lower error rate such as program execute file, stock information etc.For video/voice data, can not big problem for people's eyes and the mistake of ear institute perception.Yet for supplementary data, the appearance of a bit-errors all may cause serious problems.
Therefore, with the new E 8-VSB transfer system of previous ATSC 8VS system compatible in, supplementary data is encoded with 1/2 and 1/4 encoding rate respectively, supplementary data is multiplexed with 164 byte information bag units (164-byte packet unit) according to the previous multiplexed form of determining, multiplexed data is further pretreated to export as MPEG transport packet form, pretreated enhanced data is multiplexed with 188 byte information units (188-byte packet unit) according to the previous multiplexed form of determining, then, be transmitted with the multiplexed data of 188 byte information units.This technology is submitted to patent application (Korean Patent Application No. 10-2003-0017834, the applying date is on March 21st, 2003) by the applicant.
In the applicant's previous patent application, data are divided into master data (main data) and enhanced data (enhanced data).Master data is represented aforesaid previous MPEG-2 video and dolby digital sound data.And enhanced data is represented with 1/2 enhanced data of 1/2 encoding rate coding and 1/4 enhanced data of encoding with 1/4 encoding rate.In the applicant's previous patent application, 1/2 enhanced data and 1/4 enhanced data are called 1/2 supplementary data and 1/4 supplementary data.But, their same meaning.
For ease of explanation in the following description, described in the previous patent application of applicant, the transmission signal that is obtained by multiplexed enhanced data and master data (or normal data) is called enhancement mode 8-VSB (hereinafter being abbreviated as E8-VSB) signal.In addition, enhanced data and master data can be used separately as enhanced data and master data.
Fig. 2 is the block diagram of common ATSC 8VSB receiver.
Referring to Fig. 2, in case VSB modulated rf signal (VSB-modulated RF signal) is received by antenna, RF tuner 201 just by tuning the RF signal of selecting specific channel, is transformed to it IF signal to output to IF blender (IF mixer) 202 then.IF blender 202 will be nearly base band (BB) signal from the IF signal downward conversion (down-covert) of tuner 201 outputs, to output to demodulator 203.The demodulation of 203 pairs of nearly BB signals of demodulator is to output to compensator (equalizer) 204.
Yet, in general ATSC 8VSB receiver as shown in Figure 2, under the situation that the E8-VSB signal corresponding with the multiplex signal of enhanced data and master data is transmitted, the enhanced data packets of information will be identified as invalid information bag (null packet) by the PID (packets of information identity) of MPEG transmission head (MPEG transport header) and suitably be abandoned.Therefore, traditional ATSC 8-VSB receiver will receive master data and abandon enhanced data as the invalid information bag.
Summary of the invention
Correspondingly, the present invention aims to provide a kind of enhancement mode 8-VSB receiving system and E8-VSB data demultiplexing method, and it fully eliminates the one or more problems that cause because of the limitation of association area and defective.
An object of the present invention is to provide a kind of enhancement mode 8-VSB receiving system and E8-VSB data demultiplexing method, by this, enhanced VSB signal and previous ATSC 8VSB signal can receive with being stabilized.
Attendant advantages of the present invention, purpose and feature will partly propose in the following description, and concerning those have the personnel of this area general technology, partly pass through following checking, will become obviously, or can know from the practice of the present invention.The structure that purpose of the present invention and other advantage can pass through to particularly point out in the specification write and its claims and the accompanying drawing realizes and obtains.
For realizing that these purposes are with other advantage and according to purpose of the present invention, such as here embodiment and broadly described, a kind of according to E8-VSB receiving system of the present invention, it receives the E8-VSB signal that the E8-VSB transfer system transmits, this E8-VSB transfer system according to the multiplexed form of the E8-VSB map information in the reserve area that is inserted in the territory synchronizing signal and with 164 byte information bag units to first enhanced data of 1/2 encoding rate coding with carry out multiplexed with second enhanced data of 1/4 encoding rate coding, and further the multiplexed enhanced data packets of information of preliminary treatment to export as 188 byte transport packet, according to the multiplexed form of the E8-VSB map information in the reserve area that is inserted in the territory synchronizing signal and carry out multiplexed to preliminary treatment enhanced data and normal data with 188 byte transport packet units, this E8-VSB receiving system comprises: a tuner that receives the E8-VSB modulated rf signal by antenna, this tuner is by the RF signal of tuning selection particular channel, and this tuner is IF signal and output with the RF signal transformation of selecting; One will be the demodulator of baseband signal and output from the IF signal transformation of tuner output; One is recovered the E8-VSB map recovery device (E8-VSB map recovery) that detects from the territory synchronizing signal in the frame of demodulator output and territory identification signal by carrying out frame synchronization, the territory that this E8-VSB recovery device utilization detects synchronously and identification signal is extracted and the reserve area that is inserted in the territory synchronizing signal of decoding in the E8-VSB map information, this E8-VSB map recovery device generates various E8-VSB data attributes; Channel compensator (channel equalizer) by the channel distortion in the E8-VSB data attribute compensation VSB modulation signal of output of receiving demodulation device and E8-VSB map recovery device; And E8-VSB map information, E8-VSB data attribute and territory synchronizing signal of utilizing E8-VSB map recovery device to decode in the signal from channel compensator E8-VSB channel-decoding/multiplexer (E8-VSB channeldecoder/multiplexer) of normal data, first enhanced data and second enhanced data.
The E8-VSB map information is carried out Kerdock coding with in the reserve area that inserts the territory synchronizing signal and be included in each packets of information number of first and second enhanced datas that transmit on the territory, the multiplexed form of first and second enhanced datas and the multiplexed form of enhanced data and master data.
E8-VSB map recovery device comprises: one by detecting indication even number or the territory synchronizing signal of odd number fields and the frame synchronization recovery device (frame sync recovery) of territory identification signal from output execution frame synchronizationization from the data symbol of demodulator; A map information extractor (map information extractor) of exporting the E8-VSB map information in the synchronizing signal of extraction insertion territory from the data symbol of demodulator from utilizing the territory synchronizing signal; Kerdock decoder (Kerdock decoder) by the map information of Kerdock decoding algorithm decoding extraction; A current mapping decision device (current mapdecider) of from the E8-VSB map information of Kerdock coding, judging the E8-VSB map information of the current field by territory synchronizing signal and territory identification signal; And E8-VSB map information by the current field and territory synchronizing signal generates the E8-VSB data attribute maker (E8-VSB data attribute generator) of E8-VSB data attribute of the attribute of the symbol of indication E8-VSB data or byte unit.
E8-VSB data attribute maker comprises: a main and enhanced multiplexing packet processor (main and enhanced mux packet processor), its by receive output from the E8-VSB map information of the current field of current mapping decision device with export the 188 byte attribute information bags that generate and export the attribute information of the E8-VSB data that comprise byte unit from the territory of frame synchronization recovery device synchronizing signal; An ATSC RS encoder, it exports 207 byte attribute information bags by abandoning corresponding to first byte of the input information bag of 0x47MPEG sync byte and 20 bytes of the attribute of normal data being added to 188 byte attribute information bags; An ATSC data interleaver (ATSC data interleaver), the ATSC data byte that its attribute information of carrying out 207 bytes is wrapped is staggered to export by byte unit; And a byte-sign changer (byte-symbol converter), its intercrossed data with byte unit is transformed to symbolic unit to export as the E8-VSB data attribute.
Main and enhanced multiplexing packet processor comprises: an enhancement mode packet generator (enhanced packet generator), the attribute information bag that it generates 164 byte unit with the attribute information of only indicating first or second enhanced data according to the distribution form and the ratio of the first and second enhanced data packets of information of the current field in the E8-VSB map information of the current field; An invalid enhancement mode RS encoder (null enhanced RS coder), it copies to the enhanced data attribute information bag that has from the enhanced data attribute information of enhancement mode packet generator output by the attribute with each packets of information and expands 20 bytes; Carrying out the staggered enhanced data digital multiplexer (enhanced data interleaver) of enhanced data from the data of invalid enhancement mode RS encoder output for one; One is being inserted invalid bit to cooperate the invalid bit expander (null-bit expander) of first and second enhanced datas that will expand from the staggered byte of enhanced data digital multiplexer output; An invalid mpeg header portion inserts device, and the normal data attribute of the byte that it will be corresponding with the mpeg header portion of 4 bytes is inserted in from each 184 byte front of invalid bit expander output; And a main and enhancement mode packets of information multiplexer (main and enhanced packet multiplexer), it utilizes the current field and the territory synchronizing signal is multiplexed and output is exported from the invalid mpeg header portion that inserts with 188 byte information bag units enhanced data packets of information and normal data packets of information.
The territory synchronizing signal main and enhancement mode packets of information multiplexer basis is exported from E8-VSB map recovery device, the number (Q) of second enhanced data of the number (H) of first enhanced data of searching 164 byte information bag units and 164 byte information bag units from the E8-VSB map information, with the number (2P) of the packets of information that finds 188 byte unit that are distributed to an enhanced data in the VSB territory (2P=2H+4Q), and wherein main and enhancement mode packets of information multiplexer select multiplexed normal data packets of information of distribution and enhanced data packets of information by the location mode that is included in the E8-VSB map information.
E8-VSB channel decoder/demultiplexer comprises: a main data decoder, it is carried out Veterbi decoding (Viterbidecoding), 12-road deinterleave (12-way deinterleaving), ATSC data byte deinterleave (ATSC data byte deinterleaving), ATSC RS decoding and ATSC data to the compensator output decoder and goes randomization according to the E8-VSB data attribute; And an enhanced data decoder, its by to packets of information unit from the ATSC data interlace E8-VSB data of main data decoder output carry out in proper order that the ATSC odd even is removed, the ATSC data are gone randomization, invalid bit removals, enhanced data deinterleave, enhancement mode RS decoding and enhancement mode packets of information multichannel are decoded separation first and second enhanced datas.
And the enhanced data decoder comprises: an ATSC odd even remover, and it removes ATSC RS odd even part from output from the ATSC of main data decoder byte deinterleave packet data; ATSC data are removed randomizer, and its data that ATSC RS odd even is partly removed are carried out the ATSC data and gone randomization; A main and enhanced multiplexing packet processor, it generates the attribute information bag of the attribute information of exporting the E8-VSB data that comprise byte unit by the E8-VSB map information that receives the current field and territory synchronizing signal; An invalid bit remover, it utilizes the normal data byte and the meaningless position of removing first and second enhanced datas from the E8-VSB byte attribute of main and the output of enhanced multiplexing packet processor is first effective enhancement mode byte and second effective enhancement mode byte so that the data of byte unit are readjusted; An enhanced data deinterleaver, it is carried out staggered from the enhanced data of the enhanced data of the byte unit of the significance bit configuration of invalid bit remover with output; An enhancement mode RS decoder, it carries out the enhancement mode RS decoding to enhancement mode deinterleave data; And an enhancement mode packets of information demultiplexer, it utilizes output from the E8-VSB map information of E8-VSB map recovery device and territory synchronizing signal enhancement mode RS decoded data to be decomposed into the first enhanced data packets of information and the second enhanced data packets of information and output.
In another aspect of the present invention, a kind of E8-VSB data demultiplexing method of E8-VSB receiving system, this E8-VSB receiving system receives the E8-VSB signal that is transmitted by the E8-VSB transfer system, this E8-VSB transfer system is multiplexed with first enhanced data of 1/2 encoding rate coding and second enhanced data of encoding with 1/4 encoding rate with 164 byte information bag units according to the multiplexed form of the E8-VSB map information in the reserve area that inserts the territory synchronizing signal, and the further multiplexed enhanced data packets of information of preliminary treatment and with as the output of 1 88 byte transport packet units, and according to the multiplexed form of the E8-VSB map information in the reserve area that inserts the territory synchronizing signal with multiplexed pretreated enhanced data of 188 byte transport packet units and normal data.The E8-VSB data demultiplexing method of this E8-VSB receiving system comprises: step (a), recover by carrying out frame synchronization, and in the frame of that receive and E8-VSB data demodulation, detect the territory synchronizing signal and the territory identification signal of indication even number or odd number fields; Step (b), utilize the synchronous and identification signal in the detection territory of in step (a), detecting and extract and the reserve area that is inserted in the territory synchronizing signal of decoding in the E8-VSB map information, and generate various E8-VSB data attributes; Step (c) compensates the channel distortion that is included in the VSB modulation signal by receiving various E8-VSB data attributes; And step (d), the E8-VSB data attribute of the E8-VSB sign synchronizationization of utilizing E8-VSB map information, E8-VSB data attribute and the territory synchronizing signal of E8-VSB map recovery device and receiving and in step (c), compensate, and signal decoding normal data, first enhanced data and second enhanced data from compensating.
Step (b) comprising: step (b-1), and the data symbol that utilizes the territory synchronizing signal to export from demodulator extracts the E8-VSB map information that is inserted in the synchronizing signal of territory; Step (b-2) is by the map information of Kerdock decoding algorithm decoding extraction; Step (b-3) is judged the E8-VSB map information of the current field from the E8-VSB map information of Kerdock decoding by territory synchronizing signal and territory identification signal; Step (b-4), E8-VSB map information and territory synchronizing signal by the current field generate the E8-VSB data attribute.
Step (b-4) comprises step: the E8-VSB map information by receiving the output of current mapping decision device and the territory synchronizing signal of step (b-3) output generate and export 188 byte attribute information bags of the attribute information that comprises the E8-VSB data; Be added to 188 byte attribute information bags corresponding to first byte of the input information bag of 0x47MPEG sync byte and 20 bytes that will have an attribute of normal data and export 207 byte attribute information bags by abandoning; It is staggered and export by byte unit that 207 byte attribute information bags are carried out the ATSC data byte; And the intercrossed data of byte unit is transformed to symbolic unit and exports as E8-VSB data symbol attribute.
The attribute information bag generates step and comprises step: the enhanced data attribute information bag that generates 164 byte unit with the attribute information of only indicating first or second enhanced data according to the distribution form of the first and second enhanced data packets of information of the current field in the E8-VSB map information of the current field and ratio; Expand 20 bytes by each packets of information attribute being copied to the enhanced data attribute information bag that only has the enhanced data attribute information; It is staggered that the odd even growth data of spread step output is carried out enhanced data; Expand the staggered byte of the staggered step output of enhanced data to cooperate first and second enhanced datas by in staggered byte, inserting invalid bit; The 4 byte mpeg header portions value of indication normal data byte is inserted output in each 184 byte of invalid bit spread step output; And utilize the current field and territory synchronizing signal and multiplexed and output has the invalid mpeg header portion of insertion with 188 byte information bag units normal data packets of information and enhanced data packets of information.
And, step (d) comprising: step (d-1), and go randomization to carry out the master data decoding by Viterbi decoding, 12-road deinterleave, ATSC data byte deinterleave, ATSC RS decoding and the ATSC data carried out in proper order according to the E8-VSB data attribute the E8-VSB symbol of compensation; And step (d-2), by in the step (d-1) with the ATSC data interlace E8-VSB data of packets of information unit output carry out in proper order that the ATSC odd even is removed, the ATSC data are gone randomization, invalid bit is removed, enhanced data is staggered, enhancement mode RS decoding and enhancement mode packets of information multichannel are decoded separation first and second enhanced datas.
In E8-VSB packets of information multiplexer, the number (Q) of second enhanced data of the number (H) of first enhanced data of searching 164 byte information bag units and 164 byte information bag units from the E8-VSB map information.
In the invalid bit remover of enhanced data decoder, be that byte expansion invalid bit of inserting and the mpeg header portion that is added to the enhanced data packets of information, the utilization of normal data packets of information are removed from territory synchronizing signal, E8-VSB data attribute and the E8-VSB map of the output of E8-VSB map recovery device at the conveyer place.
Should be appreciated that above-mentioned general description of the present invention and following detailed all are exemplary and indicative and are used to provide desired of the present invention further specifying.
Description of drawings
Be included in a part that is used to provide accompanying drawing formation the application that the present invention is further understood among the present invention, be used for illustrating embodiments of the invention, and be used from explanation principle of the present invention with specification one.In the accompanying drawings:
Fig. 1 is the block diagram according to the ATSC 8VSB transfer system of prior art.
Fig. 2 is the block diagram of common ATSC 8VSB receiver.
Fig. 3 is the block diagram according to E8-VSB transfer system of the present invention.
Fig. 4 is the detailed diagram of the main and enhanced multiplexing packet processor of the system in Fig. 3.
Fig. 5 A is the structure chart of the Frame of ATSC 8VSB transfer system.
Fig. 5 B is the structure chart of the territory synchronizing signal among Fig. 5 A.
Fig. 6 is the detailed block diagram of the E8-VSB preprocessor in Fig. 4.
Fig. 7 A is the chart by multiplexed 1/2 enhanced data packets of information of even distribution and 1/4 enhanced data packets of information.
Fig. 7 B is the chart by grouping multiplexed 1/2 enhanced data packets of information of distribution and 1/4 enhanced data packets of information.
Fig. 7 C is by being alternately distributed the chart of multiplexed 1/2 enhanced data packets of information and 1/4 enhanced data packets of information.
Fig. 8 is the block diagram according to E8-VSB receiving system of the present invention.
Fig. 9 is the detailed block diagram of the E8-VSB map recovery device unit in Fig. 8.
Figure 10 is the detailed block diagram of the E8-VSB data attribute maker in Fig. 9.
Figure 11 is the detailed block diagram of the E8-VSB channel decoder/demultiplexer in Fig. 8.
Figure 12 is the detailed block diagram of the main and enhanced multiplexing packet processor in Figure 10 and Figure 11.
Figure 13 is the figure that the byte of 1/2 enhanced data expands and removes.
Figure 14 is the figure that the byte of 1/4 enhanced data expands and removes.
Figure 15 A is the chart that the grouping in multiplexed 1/2 enhanced data packets of information and 1/4 enhanced data packets of information distributes.
Figure 15 B is the alternatively distributed figure in multiplexed 1/2 enhanced data packets of information and the 1/4 enhanced data packets of information.
Figure 16 A is the chart of the multiplexed form of normal data packets of information and enhanced data packets of information, and wherein, the exemplary distribution with pattern of the condition of depending on is expressed; With
Figure 16 B is the chart of the multiplexed form of normal data packets of information and enhanced data packets of information, has wherein represented exemplary unified the distribution.
Embodiment
Now, will describe preferred embodiment of the present invention in detail, the description of drawings example.Identical Reference numeral will be used to quote same or analogous part in all as far as possible accompanying drawings.
In order to understand E8-VSB receiving system of the present invention, E8-VSB transfer system that discloses in Korean Patent Application No. 10-2003-0017834 and multiplexed processing will be explained as follows with reference to the accompanying drawings.
At first, among the Korean Patent Application No. 10-2003-0017834, recent MPEG-4 video or various supplementary data (for example, program execute file, stock information, or the like) can be transmitted by enhanced data and previous MPEG-2 video and Doby voice data.In doing so, the enhanced data except master data is carried out the error correction coding in addition.And 1/2 enhanced data and 1/4 enhanced data are meant respectively carries out coded data in addition with 1/2 and 1/4 encoding rate, is different from master data.Therefore, enhanced data has the receptivity that is better than master data in noise that is generated by channel and the interference owing to the multichannel generation.Especially, have than 1/2 enhanced data more performance at 1/4 enhanced data with 1/2 encoding rate coding with 1/4 encoding rate coding.
With reference to figure 3, main and enhanced multiplexing packet processor 301 is according to multiplexed 1/2 enhanced data of 164 byte unit and 1/4 enhanced data, and, the multiplexed enhanced data of preliminary treatment also, to be output as the transmission packet format of 188 bytes, and, then, output the data to first code device 302 according to multiplexed once more pretreated enhanced data of 188 byte information bag units and master data.First code device 302 comprises random generator 302-1, Reed-Solomon encoder 302-2 and byte digital multiplexer (byteinterleaver) 302-3 of the output that is connected to main and enhanced multiplexing packet processor 301 according to the order of sequence.302 pairs of first code devices are from data packets main and 301 outputs of enhanced multiplexing packet processor, carry out the data randomization according to the order of sequence, Reed-Solomon encodes and data interlace, outputs to E8-VSB convolution coder 303.303 conversion of E8-VSB convolution coder are symbol from the intercrossed data of the byte unit of first code device, 302 outputs, only the enhanced data symbol is carried out convolutional encoding, figure shift is the data of byte unit, and the data of output transform are to first decoding device 304 then.
First code device 304 comprises byte deinterleaver 304-1, the Reed-Solomon odd even remover 304-2 of the output that is connected to E8-VSB convolution coder 303 according to the order of sequence and removes randomizer 304-3.304 pairs of data from the byte unit of E8-VSB convolution coder 303 outputs of first code device are carried out deinterleaving data according to the order of sequence, the Reed-Solomon odd even is removed and go randomization, and output to 8VSB conveyer 100.
8-VSB conveyer 100 with identical configuration of representing in Fig. 1 is carried out data randomization, Reed-Solomon coding, data interlace, trellis code coding etc. once more according to the order of sequence to the data of having been removed the Reed-Solomon odd even by first code device 304.In Fig. 3, the ATSC of first decoding device 304 goes the ATSC random generator 101 of randomizer 304-3 and 8-VSB conveyer 100 to be omitted together.
Fig. 4 is the detailed diagram of main and enhanced multiplexing packet processor 301.At 1/2 enhanced data and 1/4 enhanced data according to 164 byte information bag units multiplexed and by the further preliminary treatment of E8-VSB preprocessor after, master data according to 188 byte information bag units and pretreated enhanced data by multiplexed.When doing like this, a frame of a picture of configuration comprises two data fields in the VSB transfer system.Each data field comprises a territory sync section and 312 data segments.And a data segment comprises the data of the data segment sync signal and the 828-symbol of 4-symbol.
With reference to figure 4, the 401 interim storages of master data buffer are exported master data to main and enhancement mode packets of information multiplexer 405 then as the master data of 188 byte unit packets of information input.The 402 interim storages of 1/2 enhanced data buffer are as 1/2 enhanced data of 188 byte unit packets of information input.The 403 interim storages of 1/4 enhanced data buffer output the data to E8-VSB preprocessor 404 then as 1/4 enhanced data of 188 byte unit packets of information input.
E8-VSB preprocessor 404 is multiplexed mutually from 1/2 enhanced data of 1/2 enhanced data buffer, 402 outputs and 1/4 enhanced data of exporting from 1/4 enhanced data buffer 403 by 164 byte information bag units according to predetermined form, further preliminary treatment is the same structure of the MPEG transport packet of master data, and the data of output transform are to main and enhancement mode packets of information multiplexer 405 then.
According to the master/enhanced data multiplexed information that is inserted in the synchronizing signal of territory, main and enhancement mode packets of information multiplexer 405 is multiplexed to be 188 byte information bag units from the master data packets of information of master data buffer 401 outputs and the enhanced data packets of information of exporting from E8-VSB preprocessor 404.
By this, in case the number of the packets of information of the enhanced data that will be transmitted on a VSB data field is determined, with multiplexed form that does not use the enhanced data in the zone and the transport packet number in the sync section of territory, the E8-VSB transfer system inserts the multiplexed map information of master/enhanced data (after this being called the E8-VSB map information), transmits corresponding signal then.Therefore, the E8-VSB receiving system can be carried out accurate multiplexed with synchronous corresponding to the territory.
Fig. 5 A is the structure chart of the Frame of ATSC 8VSB transfer system.
Be divided into odd number fields and even field with reference to 5, one frames of figure.Each territory is divided into 313 sections.313 sections comprise territory sync section and 312 data segments that comprise the learn sequence signal.
And a section comprises the 832-symbol.In this case, first 4-symbol in a section constitutes a sync section, and in each territory first section becomes a territory sync section.
Territory sync section form is indicated among Fig. 5 B.Successively, segment synchronization pattern is present in first 4-symbol, and pseudo random sequence PN 511, PN 63, PN 63 and PN 63 follow segment synchronization pattern, and VSB pattern relevant information is present in the next 24-symbol.In this case, the polarity of second PN 63 in three PN 63 parts (section) is alternately changed.That is, ' 1 ' be changed ' 0 ' or ' 0 ' to be changed ' 1 '.Therefore, according to the polarity of second PN 63, a frame can be divided into even field and odd number fields.
Simultaneously, the remaining 104-symbol of following the 24-symbol back at VSB pattern relevant information place is retained.And the last 12-symbol data of previous paragraphs is copied into the last 12-symbol of reserve area.
In the present invention, the E8-VSB map information that comprises multiplexed form and the master/enhanced data multiplexed information relevant with the transport packet number of enhanced data is inserted in the preceding 64-symbol of the reserve area in the territory sync section among Fig. 5 B to be transmitted.
That is, 64 of the reserve area in the sync section of territory secondarys (two-level) symbol is used to transmit the E8-VSB map information.By being encoded as Kerdock (64,12), the E8-VSB map information is inserted into.The polarity of Kerdock coded word is retained in an idol (negative PN63) data field.The Kerdock encryption algorithm is known, and its detailed explanation will be skipped over below.
Fig. 6 is the detailed block diagram of E8-VSB preprocessor 404.
1/2 enhanced data of cutting apart as the input of 188 byte unit packets of information with reference to figure 6,1/2 mpeg information packet transform devices 501 is 164 byte unit that do not have data to change, to output to enhancement mode packets of information multiplexer 503.And 1/4 enhanced data that 1/4 mpeg information packet transform device 502 is cut apart as the input of 188 byte unit packets of information is 164 byte unit that do not have data to change, to output to enhancement mode packets of information multiplexer 503.
According to the E8-VSB map information in the sync section of territory, by 164 byte information bag units, enhancement mode packets of information multiplexer 503 multiplexed 1/2 and 1/4 enhanced datas from 1/2 and 1/4 mpeg information packet transform device 501 and 502 outputs are to output to enhancement mode Reed-Solomon encoder 504.504 pairs of enhanced datas multiplexed in enhancement mode packets of information multiplexer 503 of enhancement mode Reed-Solomon encoder are carried out the Reed-Solomon coding, add the parity code of 20 bytes then, thus, the enhanced data of 164-byte unit is transformed to the packets of information of 184-byte unit, outputs to enhanced data digital multiplexer 505.In order to strengthen the performance of anti-burst noise, enhanced data digital multiplexer 505 changes from the sequence of the data of enhancement mode Reed-Solomon encoder 504 outputs, and the data of output sequence change are inserted device 506 to invalid bit (null-bit) then.After this, invalid bit is inserted the invalid bit of device 506 insertions corresponding to 1/2 or 1/4 enhanced data of importing from enhanced data digital multiplexer 505, and with the extend information bag, the packets of information of output expansion is to mpeg header portion insertion device 507 then.Mpeg header portion inserts device 507 and inserts the mpeg header portion that the previous section of the enhanced data of the invalid bit that device 506 inserts is inserted 4 bytes having by invalid bit of each 184 byte, so that the MPEG transport packet of form and master data is consistent, the corresponding data of output are to main and enhancement mode packets of information multiplexer 405 then.VSB receiver in front receives in the situation of enhanced data packets of information, and this packets of information is abandoned by detecting PID.
When 1/2 enhanced data of 1 byte was transfused to, invalid bit was inserted device 506 and insert an invalid bit between each position, to expand to 2 bytes.When 1/4 enhanced data of 1 byte was transfused to, invalid bit was inserted device 506 and is repeated each twice of position and insert invalid bit between each position, to expand to 4 bytes.Like this, an invalid bit will be replaced by a parity check bit by E8-VSB convolution coder 303.
In addition, be used at the enhancement mode packets of information multiplexer 503 multiplexed 1/2 of E8-VSB preprocessor 404 and the multiplexed information of 1/4 enhanced data, and be used for main and enhanced multiplexing packet processor 301 mainly and the multiplexed information of enhancement mode packets of information multiplexer 405 multiplexed master datas and enhanced data, be called as the E8-VSB map information in the present invention.As mentioning in above stated specification, the E8-VSB map information is encoded by Kerdock, is inserted in then in the reserve area in the sync section of territory to transmit.
Simultaneously, in the enhancement mode packets of information multiplexer 503 of E8-VSB preprocessor 404 multiplexed 1/2 and the method for 1/4 enhanced data be described in detail as follows.
At first, in enhancement mode packets of information multiplexer 503, H and Q will be defined as respectively by the number of 1/2 and 1/4 enhanced data packets of information of 164 byte unit in the multiplexed VSB data field.
In this case, invalid bit shown in Figure 6 is inserted device 506, in the situation of 1/2 enhanced data that receives 1 byte, insert an invalid bit to export 2 bytes, perhaps in the situation of 1/4 enhanced data that receives 1 byte, insert invalid bit to export 4 bytes.Because a VSB data field is made up of 312 data segments, so, if only 1/2 enhanced data by multiplexed to be transmitted, the maximum of ' H ' becomes 156 (=312/2).According to same rule, in the situation that only transmits 1/4 enhanced data, the maximum of ' Q ' becomes 78 (=312/4), if that is: only 1/2 enhanced data be transmitted, so, can transmit 156-packets of information (1-packets of information=164 bytes) at most.And,, so, can transmit 78-packets of information (1-packets of information=164 bytes) at most if only 1/4 enhanced data is transmitted.
This can generate by following equation.
N+2H+4Q＝312
In this case, the number of the data segment in a VSB territory is 312, and this is to obtain by the packets of information number (Q) of the packets of information number (H) of normal data packets of information number (N), first enhanced data and second enhanced data being added mutually together according to top expression formula.
If the value of " H " and " Q " is determined, so, Korean Patent Application No. 10-2003-0017834 has recommended in enhancement mode packets of information multiplexer 503 multiplexed 1/2 and the method for 1/4 enhanced data packets of information.
As shown in Fig. 7 A, the unified first multiplexed method is with same intervals multiplexed 1/2 and 1/4 enhanced data packets of information.
As shown in fig. 7b, the second multiplexed method of dividing into groups is by respectively to 1/2 enhanced data packets of information and 1/4 enhanced data the packets of information multiplexed 1/2 and 1/4 enhanced data packets of information of dividing into groups.As shown in fig. 7b, 1/2 enhanced data packets of information is grouped into a data field being output, and 1/4 enhanced data packets of information then is grouped into a data field to be output.
Again, as shown in fig. 7c, replacing multiplexed third party's method is alternately multiplexed 1/2 and 1/4 enhanced data packets of information.At first, as shown in fig. 7c, 1/2 and 1/4 enhanced data packets of information is by alternately multiplexed.In case 1/2 or 1/4 enhanced data packets of information is by fully multiplexed, so, remaining data packets is by multiplexed.
That is, Fig. 7 A is illustrated in the method for the multiplexed 1/2 and 1/4 enhanced data packets of information that will be transmitted under H=8 and the Q=2 situation on a VSB data field to 7C.
If the number H and the Q of the 1/2 and 1/4 enhanced data packets of information that transmits on a VSB data field are determined, so, the number of the number of 1/2 enhanced data packets of information, 1/4 enhanced data packets of information with carry out the relevant E8-VSB map information of multiplexed form with the multichannel multiplexing method that is used for explaining above and be inserted in the reserve area of territory sync section the inside being sent to the E8-VSB receiving system, and be output to enhancement mode packets of information multiplexer 503 and main and enhancement mode packets of information multiplexer 405.Then, according to the enhanced data multiplexed information with multiplexed form, enhancement mode packets of information multiplexer 503 multiplexed 1/2 and 1/4 enhanced data packets of information.By this, be used for multiplexed form and can be fixed to a kind of of multichannel multiplexing method (form), perhaps can be determined adaptively according to the number of 1/2 and 1/4 multiplexed on VSB data field enhanced data packets of information.
In a kind of situation that only adopts according to E8-VSB transfer system of the present invention in three kinds of methods, the value of ' H ' and ' Q ' only needs to be present in the E8-VSB map information of synchronizing signal the inside, territory.Yet, in the situation that two kinds of quilts in the situation that three kinds of all methods are randomly used or in three kinds of methods randomly use, indicate which kind of method to be used as corresponding multiplexed information and should be added in the E8-VSB map information of territory synchronizing signal the inside.
That is, information, the indication of the transport packet number of 1/2 and 1/4 enhanced data of data field the inside be used to multiplexed 1/2 and the information of the information of the form of 1/4 enhanced data and the form that indication is used to multiplexed enhanced data and master data should be included in the E8-VSB map information in the reserve area that inserts sync section the inside, territory.
Fig. 8 is the block diagram that is used to receive the E8-VSB receiving system of the E8-VSB signal that the E8-VSB transfer system shown in Fig. 3 to 7 transmits according to of the present invention.
With reference to figure 8, comprise a tuner 601, IF blender 602, demodulator 603, compensator 604, an E8-VSB map recovery device 605 and an E8-VSB channel decoder/demultiplexer 606 according to E8-VSB receiving system of the present invention.Identical with shown in Fig. 2 of the configuration of tuner 601, IF blender 602 and demodulator 603 and operation.
That is, in case an E8-VSB modulated RF signal is received by antenna, tuner 601 is transformed into an IF signal to it, to output to IF blender 602 then by a tuning RF signal only selecting a particular channel.IF blender 602 downward conversions are nearly base band (BB) signal from the IF signal of tuner 601 outputs, to output to demodulator 603.603 pairs of nearly BB signals of demodulator are carried out the VSB demodulation, to output to compensator 604 and E8-VSB map recovery device 605.The E8-VSB map information that E8-VSB map recovery device 605 detects in the reserve area that is inserted in the territory sync section is to output to compensator 604 and E8-VSB channel decoder/demultiplexer 606.Compensator 604 receives the output of decision-feedback and E8-VSB map recovery device 605 from the E8-VSB channel decoder/demultiplexer 606 of end at it, compensation is included in the channel distortion in the VSB-restituted signal then, to output to E8-VSB channel decoder/demultiplexer 606.That is to say that compensator 604 utilizes the output of E8-VSB map recovery device 605 and carries out the enhancement mode compensation from the more reliable sign determination of E8-VSB channel decoder/demultiplexer 606.
Fig. 9 is the detailed block diagram of E8-VSB map recovery device 605.
With reference to figure 9, E8-VSB map recovery device 605 comprises: a data symbol of exporting from the data symbol or the enhancement mode compensator 604 of demodulator 603 outputs extracts the E8-VSB map extractor 701 of E8-VSB map information; A Kerdock decoder 702 of the E8-VSB map information of extracting being decoded according to the Kerdock decoding algorithm; A frame synchronization recovery device 704 is carried out from the data symbol of demodulator 603 outputs or from the frame synchronizationization of the data symbol of enhancement mode compensator 604 outputs, with the territory identification signal of domain output synchronizing signal and indication even number or odd number fields; A current mapping decision device 703 of judging current map by the E8-VSB map information, territory synchronizing signal and the territory identification signal that are received in decoding in the Kerdock decoder 702; And E8-VSB data attribute maker 705 that generates the attribute information of current E8-VSB data according to current map information and territory synchronizing signal.
E8-VSB map recovery device 605 is carried out and is extracted the operation that is inserted in the E8-VSB map information in the sync section of territory by the E8-VSB transfer system.The E8-VSB data attribute maker 705 of E8-VSB map recovery device 605 generates the information of the attribute of each E8-VSB data of indication, to offer compensator 604 and E8-VSB channel decoder/demultiplexer 606, therefore, be used to strengthen both performances of compensator 604 and E8-VSB channel decoder/demultiplexer 606.
In order to receive the E8-VSB signal, the present invention of 605 pairs of above-mentioned configurations of E8-VSB map recovery device is crucial.For reliable Detection E8-VSB map, E8-VSB map recovery device 605 optionally receives its input data between the output signal of the input of compensator 604 and compensator 604.
Simultaneously, explained later is an example of the input/output signal of E8-VSB map recovery device 605 using compensation devices.
First method can according to the operation that has or do not exist compensator 604 and the output SNR of the rear end of compensator optionally using compensation device 604 input or output the input data of signal as E8-VSB map recovery device 605.By a pair of E8-VSB map recovery device unit is provided, the E8-VSB map information that second method can be drawn current received signal is with the reliability of the output that utilizes a pair of E8-VSB map recovery device unit.And the third method makes the signal Synchronizationization of input and output side of compensator 604, with the input data as E8-VSB map recovery device 605.
By this, the frame of VSB signal should be synchronized, and makes E8-VSB map recovery device can discern the existence of enhancement mode from the signal that receives.Therefore, by carrying out frame synchronizationization, frame synchronization recovery device 704 is the territory identification signal of even number or odd number fields from data symbol detection territory synchronizing signal and indication the current field of input, then they is outputed to E8-VSB map extractor 701, current mapping decision device 703 and E8-VSB data attribute maker 705.That is, use the polarity of second PN 63 in the learning signal of territory synchronizing signal part, can detect the current field is even number or odd number fields.
The territory synchronizing signal that E8-VSB map extractor 701 receives from frame synchronization recovery device 704.If the data symbol of input is indicated the territory synchronizing signal, so, E8-VSB map extractor 701 extracts the E8-VSB map information that is included in the synchronizing signal part of territory, exports the information of extracting then and arrives Kerdock decoder 702.
By this, because the E8-VSB map information of extracting is transmitted by the E8-VSB transfer system by the Kerdock encryption algorithm coding according to clear statement in the E8-VSB explanation, so, Kerdock decoder 702 is according to the E8-VSB map information decoding of Kerdock encryption algorithm to extracting, to output to current mapping decision device 703.According to territory synchronizing signal and territory identification signal from 704 outputs of frame synchronization recovery device, the E8-VSB map information that current mapping decision device 703 is divided the Kerdock decoding is even field E8-VSB map information and odd number fields E8-VSB map information, then, judge the E8-VSB map information of the current field once more.Therefore, the E8-VSB map information of the current field of judgement is outputed to E8-VSB channel decoder/demultiplexer 606 and E8-VSB data attribute maker 705 simultaneously.
E8-VSB data attribute maker 705 generates indication other signal of symbol, byte and packet-level about the attribute of E8-VSB data based on the E8-VSB map information of the current field.That is, E8-VSB data attribute maker 705 generates whether designated symbol, byte or packets of information are the signals of normal data (or master data) or enhanced data.In the situation of enhanced data, it is the attribute information of 1/2 enhanced data or the enhanced data of 1/4 enhanced data that 705 generations of E8-VSB data attribute maker are used to indicate enhanced data, then, the information of output generation is to compensator 604 and E8-VSB channel decoder/demultiplexer 606.
Figure 10 is the detailed block diagram of E8-VSB data attribute maker 705.
With reference to Figure 10, E8-VSB data attribute maker 705 comprises: a main and enhanced multiplexing packet processor 801, it receives the E8-VSB map information and the territory synchronizing signal of the current field, to export 188 byte attribute information bags that comprise the attribute information of discerning normal data, 1/2-ratio enhanced data or 1/4-ratio enhanced data; An invalid ATSC RS encoder 802, it is by abandoning corresponding to first byte of the input information bag of 0x47 MPEG sync byte and adding the odd even amount of ATSC RS encoder, and 20 bytes of attribute that promptly have normal data are to one 207 byte attribute information bag of 188-byte attribute information bag output; An ATSC data interleaver 803, its staggered 207 byte attribute information bag; With a byte-sign changer 804, the staggered data of its conversion byte unit are the data of symbolic unit, with the attribute of output as the E8-VSB data symbol.The E8-VSB symbol attribute is provided to the Viterbi decoder 901 of enhancement mode compensator 604 and E8-VSB channel decoder/demultiplexer 606.
As shown in Figure 10, the E8-VSB data attribute maker 705 of above-mentioned configuration generates the attribute information of each symbol in the mode of the E8-VSB map information of using territory synchronizing signal and the current field.
That is, the E8-VSB map information of main and enhanced multiplexing packet processor 801 acceptance domain synchronizing signals and the current field arrives invalid ATSC RS encoder 802 with output with the attribute information bag of 188 bytes formation.Attribute information Bao Wei comprises data message, and comprises the attribute information of each byte.And attribute also makes it possible to discern byte that each byte is a normal data, by the byte of 1/2 enhanced data of 1/2 encoding rate coding or by the byte of 1/4 enhanced data of 1/4 encoding rate coding.Figure 12 is the detailed block diagram of main and enhanced multiplexing packet processor 801, will explain in detail in the back.
By abandoning first byte corresponding to the input information bag of 0x47 MPEG sync byte, and add the odd even amount of ATSC RS encoder, 20 bytes that promptly have the attribute of normal data arrive 188-byte attribute information bag, and invalid ATSC RS encoder 802 output 207-byte attribute information bags are to ATSC data interleaver 803.803 pairs of 207-bytes of ATSC data interleaver attribute information bag is carried out the ATSC data interlace, to output to byte-sign changer 804.The intercrossed data of byte-sign changer 804 conversion byte unit is the data of symbolic unit, with the attribute of output as the E8-VSB data symbol.And E8-VSB data symbol attribute is provided to the Viterbi decoder 901 of enhancement mode compensator 604 and E8-VSB channel decoder/demultiplexer 606.
Therefore each attribute that compensator 604 receives by the VSB symbol of E8-VSB map recovery device 605 current inputs, can bring into play the compensation ability stronger than the compensator of routine.In addition, the sign determination of the Viterbi decoder 901 by feedback E8-VSB channel decoder/demultiplexer 606 can strengthen compensation performance to compensator 604.That is, because the reliability of enhancement mode symbol is higher than the normal data symbol, so, using two kinds of information (that is, E8-VSB data symbol attribute and from the sign determination of Viterbi decoder 901 feedback), compensator 604 can improve its compensation performance.
Simultaneously, as shown in Figure 11, E8-VSB channel decoder/demultiplexer 606 has independently data path to receive enhanced data and normal data.Promptly, by using the E8-VSB map information and indicating the E8-VSB data attribute of multiplexed information of the E8-VSB signal of current reception to decode in the corresponding way or separate the signal of reception, the E8-VSB receiving system can receive normal data MPEG TPS# 1,1/2 enhanced data MPEG TPS# 2 and 1/4 enhanced data MPEG TPS#3.In this case, a kind of in pattern indication normal data, 1/2 enhanced data and 1/4 enhanced data.
Figure 11 is the detailed block diagram of E8-VSB channel decoder/demultiplexer 606.
With reference to Figure 11, E8-VSB channel decoder/demultiplexer 606 comprises: one from the Signal Separation of compensation and the master data decoding device 900 of the normal data MPEG TPS# 1 that decodes, and separating with the decoding enhanced data and the data of separating decoding with one is the enhanced data decoding device 950 of 1/2 enhanced data MPEG TPS# 2 and 1/4 enhanced data MPEG TPS#3.Master data decoding device 900 is identical with the channel decoder of traditional ATSC receiver, and different is: the Viterbi decoder 901 of main decoder device 900 uses from the E8-VSB data attribute of the symbolic unit of E8-VSB data attribute maker 705 normal data and enhanced data is decoded.Enhanced data decoding device 950 is the data paths to the decoding of 1/2 and 1/4 enhanced data.
Master data decoding device 900 comprises: Viterbi decoder/12-circuit-switched data deinterleaver 901, ATSC byte deinterleaver 902, an ATSC RS decoder 903 and ATSC data are removed randomizer 904.
Promptly, identical with the situation of the 8VSB channel decoder of routine, the normal data symbol of compensation goes randomizer 904 to be decoded as normal flow MPEG TPS# 1 by Viterbi decoder/12-road deinterleaver 901, ATSC data byte deinterleaver 902, ATSC RS decoder 903 and the ATSC data of master data decoding device 900 in compensator 604.Transmission signal from traditional ATSC 8VSB conveyer is judged as the signal that only has normal data by E8-VSB map recovery device, and, can be received by the path of master data decoding device 900.
Again because 8VSB signal and enhanced VSB signal according to the situation of E8-VSB signal by multiplexed, so compare, in E8-VSB channel decoder/demultiplexer 606, have two difference with the ATSC 8VSB channel decoder of routine.The one, the decoding that is suitable for each E8-VSB symbol should be performed in the Viterbi decoder based on the attribute of E8-VSB symbol, and another difference is the independently data path that have enhanced data.
Enhanced data decoding device 950, be the data path to enhanced data decoding, it comprises: ATSC RS odd even remover 951, ATSC data are removed randomizer 952, invalid bit remover 953, enhanced data deinterleaver 954, enhancement mode RS decoder 955, an enhancement mode packets of information demultiplexer 956 and a main and enhanced multiplexing packet processor 957.
E8-VSB channel decoder/the demultiplexer 606 of consideration in Figure 11, E8-VSB symbol that compensates in compensator 604 and the E8-VSB data symbol attribute that is generated by E8-VSB map recovery device 605 are synchronized to be imported into Viterbi decoder/12-road deinterleaver 901.
By this, because normal symbol and enhancement mode symbol are blended in the symbol of the compensation that is input to Viterbi decoder/12-road deinterleaver 901, so, based on E8-VSB data symbol attribute, Viterbi decoder/12-road deinterleaver 901 is discerned proper symbol and enhancement mode symbol each other, then, carry out the Viterbi decoding accordingly.And Viterbi decoder/12-road deinterleaver 901 is carried out deinterleaves, with the result of output byte unit to ATSC data byte deinterleaver 902.Again, the 8-level decision content from the Viterbi decoder is fed back to compensator 604 during decoding.ATSC data byte deinterleaver 902, deinterleave is from the data of the byte unit of Viterbi decoder/12-road deinterleaver 901 outputs.
That is, according to the opposite process of ATSC byte digital multiplexer in Fig. 3, the output of Viterbi decoder/12-road deinterleaver 901 is carried out the mode of deinterleave, the data of ATSC data byte deinterleaver 902 output byte units.The data of deinterleave can be divided into 188 byte information bag units, and can be separated into normal data packets of information and enhanced data packets of information.Be input to the ATSC RS odd even remover 951 of ATSC RS decoder 903 and enhanced data decoding device 950 from the data of ATSC data byte deinterleaver 902 outputs identically.
According to the opposite process of ATSC RS encoder in Fig. 3, the data packets of 903 pairs of ATSC data bytes of ATSC RS decoder deinterleaver, 902 outputs is carried out the RS decoding, then, outputs results to the ATSC data and removes randomizer 904.
The ATSC data are gone the output of randomizer 904, are output as MPEG TPS# 1 at last.Because the enhanced data packets of information encapsulates with invalid PID, so, go enhancement mode packets of information multiplexed in the output of randomizer 904 to be abandoned in data, and it is no problem to receive the normal information bag thus in conventional AV (audio/video) decoder.
The ATSC RS odd even remover 951 of enhanced data decoding device 950 is removed ATSC RS odd even part from the output of ATSC data byte deinterleaver 902, then, outputs results to the ATSC data and removes randomizer 952.That is, because ATSC odd even part is not used in the enhanced data decoding, so it can be removed.
According to the opposite process of ATSC random generator 302-1 in Fig. 3, the ATSC data go the removed data of 952 couples of ATSC RS of randomizer odd even part to go randomization, then, output results to invalid bit remover 953.
705 identifications of E8-VSB data attribute maker go from the ATSC data whether the output of randomizer 952 is normal data byte or enhanced data byte.If it is the enhanced data byte, so, whether E8-VSB data attribute maker 705 further identification enhanced data byte is 1/2 enhanced data byte or 1/4 enhanced data byte.Invalid bit remover 953 is removed whole normal data byte (comprising the mpeg header portion byte that joins the enhanced data packets of information) and is inserted into the invalid bit of enhanced data byte, to reconfigure significant byte, export the byte that reconfigures then and arrive enhanced data deinterleaver 954.Whether by this, making it possible to discern each byte from VSB byte attribute informations main and 957 outputs of enhanced multiplexing packet processor is normal flow, 1/2 enhanced data byte or 1/4 enhanced data byte.
At first, in the situation of normal data byte, each quilt is removed fully.Like this, the mpeg header portion that have the normal data attribute, is inserted in the 1/2 or 1/4 enhanced data packets of information also is removed.Simultaneously, in the situation of enhanced data type, as shown in Figure 13 and Figure 14, execution reconfigures.Therefore, invalid bit remover 953 is ignored normal data and is only exported 1/2 and 1/4 enhanced data that invalid bit is removed.
Promptly, in the situation of 1/2 enhanced data, because, as shown in Figure 13 (b), by insert invalid bit in the E8-VSB transfer system, it is 2 bytes that a byte is expanded, so, nonsensical position (that is: an invalid bit) in (b) of Figure 13 is removed, and reconfigures a significant byte among (a) of Figure 13.In the situation of 1/4 enhanced data, as shown in (b) of Figure 14, each is repeated and invalid bit is inserted into to carry out 4 byte expansion.Therefore, nonsensical position (that is: the position and the invalid bit of repetition) is removed from (b) of Figure 14, to reconfigure 4 1/4 continuous enhanced data bytes for as in a significant byte as shown in (a) of Figure 14.
Enhanced data deinterleaver 954 according to the opposite mode of enhanced data digital multiplexer 505 in Fig. 6, carry out deinterleave to what export by the enhanced data of forming by adopted byte from invalid bit remover 953, then, the data of output deinterleave are to enhancement mode RS decoder 955.Enhancement mode RS decoder 95 5 is carried out decoding according to the mode opposite with enhancement mode RS encoder 504 in Fig. 6 to the data of deinterleave, and then, the data of output decoder are to enhancement mode packets of information demultiplexer 956.
Enhancement mode packets of information demultiplexer 956 uses from the E8-VSB map information and the territory synchronizing signal of 605 outputs of E8-VSB map recovery device, with the data separating of enhancement mode RS decoding is 1/2 enhanced data packets of information of 164 byte unit and 1/4 enhanced data packets of information of 164 byte unit, then, export them respectively and be MPEG TPS #2 and MPEG TPS #3.The scheme of separating makes an explanation with reference to Figure 15, and the method that generates the enhancement mode packets of information with enhanced data attribute information makes an explanation with reference to the enhancement mode packet generator in Figure 12.Therefore, by receiving the E8-VSB signal, can receive normal data M PEG TPS # 1,1/2 enhanced data MPEG TPS # 2 and 1/4 enhanced data MPEG TPS # 3.
That is to say that the main and enhanced multiplexing packet processor 801 in Figure 10 is carried out and main and enhanced multiplexing packet processor 957 identical operations in Figure 11.The detail drawing of the correspondence of main and enhanced multiplexing packet processor as shown in figure 12.
In the present invention, main and enhanced multiplexing packet processor is provided to E8-VSB data attribute maker 705 and E8-VSB channel decoder/demultiplexer 606 respectively.Perhaps, a main and enhanced multiplexing packet processor is set in the present invention, makes the output of main and enhanced multiplexing packet processor can be used in simultaneously in E8-VSB data attribute maker 705 and the E8-VSB channel decoder/demultiplexer 606.
Figure 12 is the detailed block diagram of main and enhanced multiplexing packet processor 801 or 957.
Use is by E8-VSB map information of the current field of current mapping decision device 703 judgements of E8-VSB map recovery device 605 and the territory synchronizing signal of being recovered by frame synchronization recovery device 704, and main and enhanced multiplexing packet processor generates the attribute information of the E8-VSB data of byte unit.It is the information of normal data byte or enhanced data byte that the attribute information of the E8-VSB data of byte unit provides current byte.If current byte is the enhanced VSB byte, so attribute information also provide the enhanced data byte be with 1/2 enhanced data of 1/2 encoding rate coding also the person be information with 1/4 enhanced data of 1/4 encoding rate coding.
For this reason, main and enhanced multiplexing packet processor comprises: the invalid enhancement mode RS encoder of enhancement mode packet generator 1011,1012, enhanced data digital multiplexer 1013, invalid bit expander 1014, invalid mpeg header portion's inserter 1015 and one are mainly and enhancement mode packets of information multiplexer 1016.
That is, 1,011 one of the generation of enhancement mode packet generator have the attribute information bag that enhanced data is 1/2 enhanced data or the attribute information of 1/4 enhanced data.By the E8-VSB map information of the current field, the distribution and the ratio of the 1/2 and 1/4 enhanced data packets of information of the current field are determined.According to two kinds of distribution patterns, Figure 15 A and Figure 15 B represent that the number of the packets of information of 1/2 enhanced data is that the number of the packets of information of eight and 1/4 enhanced data is two situation.Promptly, Figure 15 A represents an example of 1/2 enhanced data packets of information and 1/4 enhanced data packets of information multiplexed to carry out by dividing into groups respectively (it is multiplexed to divide into groups), and Figure 15 B represents that 1/2 enhanced data packets of information and 1/4 enhanced data packets of information are one by one by the example of multiplexed (alternately multiplexed) alternately.
By this, enhancement mode packet generator 1011 generates the attribute signal whether each enhanced data packets of information has 1/2 or 1/4 attribute, rather than includes the signal of meaning data.This attribute signal makes it possible to by invalid enhancement mode RS encoder 1012, enhanced data digital multiplexer 1013, invalid bit expander 1014, invalid mpeg header portion's inserter 1015 and attribute main and enhancement mode packets of information multiplexer 1016 output E8-VSB data bytes.
That is, have from the attribute information bag of 164 bytes of the attribute information of the enhanced data of enhancement mode packet generator 1011 output and be imported into invalid enhancement mode RS encoder 1012.Invalid enhancement mode RS encoder 1012 adds the attribute information bag of the parity value of one 20 byte to 164 bytes that receive, to export the attribute information bag of one 184 byte.By this, the parity value that joins the odd even zone is used for checking.Therefore, the attribute of each packets of information be copied with the odd even amount as many be used for the expansion.That is, though be added in normal data path by the parity value of the enhancement mode RS coding generation of carrying out essence,, expansion is carried out to the mode in odd even zone with the copy and the attribute of as many each packets of information of odd even amount by invalid enhancement mode RS encoder 1012.
The output of invalid enhancement mode RS encoder 1012 is imported into enhanced data digital multiplexer 1013 and is used to interlock, and staggered output is output to invalid bit expander 1014.Obtain to interlock according to the mode identical with enhanced data digital multiplexer 505.
As shown in Figure 13 or Figure 14,1014 expansions of invalid bit expander are from the staggered byte of enhanced data digital multiplexer 1013 outputs, to adapt to 1/2 or 1/4 enhanced data.Promptly, if from the byte of enhanced data digital multiplexer 1013 is to have the byte of 1/2 attribute information and have as in the configuration as shown in (a) of Figure 13, so, as shown in (b) of Figure 13, invalid bit expander 1014 inserts invalid bit in byte, to expand to two bytes.If from the byte of enhanced data digital multiplexer 1013 is to have the byte of 1/4 attribute information and have as in the configuration as shown in (a) of Figure 14, so, invalid bit expander 1014 execute bits repeat and invalid bit is inserted, and are four bytes to expand this byte.Then, the byte of invalid bit expander 1014 output expansion is to invalid mpeg header portion inserter 1015.By this,,, different with the invalid bit expander of conveyer so b7 is equal to mutually to the value of b0 because the byte of expansion means the attribute of enhanced data.
Indication of invalid mpeg header portion's inserter 1015 addings is arrived from the front of each 184 byte of invalid bit expander 1014 outputs corresponding to the value of the normal data byte of mpeg header portion, then, the corresponding result of output arrives main and enhancement mode packets of information multiplexer 1016.By the main and enhancement mode packets of information multiplexer 1016 multiplexed normal data packets of information of 188 byte information bag unit output information bags and enhanced data packets of information to export.By this, main and enhancement mode packets of information multiplexer 1016 is based on the territory synchronizing signal of being exported by E8-VSB map recovery device 605, seek the number Q of 1/4 enhanced data packets of information of the number H of 1/2 enhanced data packets of information of 188 byte unit and 188 byte unit from the E8-VSB map information, then, search the number 2P (2P=2H+4P) of packets of information of 188 byte unit of the enhanced data of distributing to each VSB territory.
Main and enhancement mode packets of information multiplexer 1016 uses multiplexed rule, multiplexed normal data packets of information and enhanced data packets of information according to the location mode of selecting in the E8-VSB map information.For example, if a mode profile method is selected, so, as being used in the multiplexed rule as shown in Figure 16 A.By this rule, the position of the enhanced data packets of information in data field is assigned to per four sections that start from least one predetermined starting position ( fragment position 0,2,1 and/or 3) in data field.
On the other hand, if (unification) location mode is selected uniformly, so, can be used in the multiplexed rule shown in Figure 16 B.In " s " that in two rules, show expression data field with respect to packets of information (perhaps expression section before the ATSC byte-interleaving) position of the enhanced data packets of information of territory synchronization signal.By signal in an indication of the situation of normal data packets of information time output normal data byte, perhaps signal from invalid mpeg header portion inserter 1015 of output when the situation of enhanced data packets of information, last E8-VSB data byte attribute is output.
As mention in front according to digital E8-VSB receiving system of the present invention and E8-VSB data demultiplexing method, with the new E8-VSB transfer system of the ATSC 8VSB system compatible of routine in, enhanced data is respectively with 1/2 encoding rate and 1/4 encoding rate coding.1/2 and 1/4 enhanced data according to the previous multiplexed form of determining with 164 byte information bag units by multiplexed, and further pretreated, with form output as the MPEG transport packet.And, pretreated enhanced data and master data according to the previous multiplexed form of determining with 188 byte information bag units once more by multiplexed.In such a case, can all receive ATSC 8VSB signal and E8-VSB signal according to E8-VSB receiving system of the present invention.
In addition, being inserted into the E8-VSB map information that transmits in the sync section of territory in the E8-VSB transfer system is extracted to generate the information of the attribute of indicating each E8-VSB data.Normal data, 1/2 enhanced data and 1/4 enhanced data are separated from each other, with decoded in channel decoder.And E8-VSB data symbol attribute is used to channel compensation.Therefore, the present invention has improved the performance of compensator, thus, can strengthen the performance of E8-VSB receiving system.
It will be apparent to those skilled in the art that various modifications and variations can realize in the present invention.Therefore, the present invention comprises all modifications and variations that fall in claim provided by the invention and their equivalency range.
Claims (25)
1, a kind of E8-VSB receiving system, it receives the E8-VSB signal that transmits from the E8-VSB transfer system, this E8-VSB transfer system carries out multiplexed with 164 byte information bag units to first enhanced data of encoding with 1/2 encoding rate and second enhanced data of encoding with 1/4 encoding rate according to the multiplexed form of the E8-VSB map information in the reserve area that is inserted in the territory synchronizing signal, and further the multiplexed enhanced data packets of information of preliminary treatment with output as 188 byte transport packet, with 188 byte transport packet units preliminary treatment enhanced data and normal data are carried out multiplexedly according to the multiplexed form of the E8-VSB map information in the reserve area that is inserted in the territory synchronizing signal, this E8-VSB receiving system comprises:
Tuner by antenna reception E8-VSB modulated rf signal, this tuner are by the RF signal of tuning selection particular channel, and this tuner is that the IF signal is with output with the RF signal transformation of selecting;
One will be the demodulator of baseband signal with output from the IF signal transformation of tuner output;
One is recovered E8-VSB map recovery device that the territory synchronizing signal in the frame of demodulator output and territory identification signal are detected by carrying out frame synchronization, the territory that this E8-VSB recovery device utilization detects synchronously and the identification signal extraction be inserted in E8-VSB map information in the reserve area of territory synchronizing signal with decoding, this E8-VSB map recovery device generates various E8-VSB data attributes;
A channel compensator that is included in the channel distortion in the VSB modulation signal by the E8-VSB data attribute compensation of output of receiving demodulation device and E8-VSB map recovery device; And
From the signal that channel compensator, compensates, the decode E8-VSB channel decoder/multiplexer of normal data, first enhanced data and second enhanced data of E8-VSB map information, E8-VSB data attribute and a territory synchronizing signal of utilizing E8-VSB map recovery device.
2, E8-VSB receiving system as claimed in claim 1, it is characterized in that, wherein the E8-VSB map information is carried out Kerdock coding with in the reserve area that inserts the territory synchronizing signal, and is included in the information of the multiplexed form of the multiplexed form of each packets of information number, first and second enhanced datas of first and second enhanced datas that transmit on the territory and enhanced data and master data.
3, E8-VSB receiving system as claimed in claim 1, it is characterized in that, wherein E8-VSB map recovery device according to channel compensator operation have or not and the output signal to noise ratio (SNR) of channel compensator afterbody by the receive channel compensator input or output that signal carries out that frame synchronization is recovered, the generation of the decoding of E8-VSB map information and E8-VSB data attribute.
4, E8-VSB receiving system as claimed in claim 1, it is characterized in that, wherein E8-VSB map recovery device comprises two identical E8-VSB map recovery device unit, wherein each E8-VSB map recovery device all utilizes inputing or outputing of channel compensator to carry out territory synchronizing signal, territory identification signal and the detection of E8-VSB map information and the generation of E8-VSB data attribute respectively, and the reliability of the output by contrasting two identical E8-VSB map recovery devices is selected final output.
5, E8-VSB receiving system as claimed in claim 1, it is characterized in that wherein E8-VSB map recovery device utilizes the synchronized input and output signal of channel compensator to carry out the generation of frame synchronization recovery, the decoding of E8-VSB map information and E8-VSB data attribute.
6, E8-VSB receiving system as claimed in claim 1 is characterized in that, wherein E8-VSB map recovery device comprises:
Carry out frame synchronizationization by the data symbol of exporting from demodulator for one and detect indication even number or the territory synchronizing signal of odd number fields and the frame synchronization recovery device of territory identification signal;
One is utilized the territory synchronizing signal to extract the map information extractor that is inserted in the E8-VSB map information in the synchronizing signal of territory from the data symbol of demodulator output;
Kerdock decoder by the map information of Kerdock decoding algorithm decoding extraction;
A current mapping decision device of from the E8-VSB map information of Kerdock decoding, judging the E8-VSB map information of the current field by territory synchronizing signal and territory identification signal; And
One by the current field the E8-VSB map information and the E8-VSB data attribute maker of the E8-VSB data attribute of the attribute of the territory synchronizing signal symbol that generates indication E8-VSB data or byte unit.
7, E8-VSB receiving system as claimed in claim 6 is characterized in that, E8-VSB data attribute maker comprises:
A main and enhanced multiplexing packet processor, the E8-VSB map information of its current field by receiving current mapping decision device output and the territory synchronizing signal of frame synchronization recovery device output generate and export 188 byte attribute information bags of the E8-VSB data attribute information that comprises byte unit;
An ATSC RS encoder, it is added to 188 byte attribute information bags corresponding to first byte of the input information bag of 0x47 MPEG sync byte and 20 bytes that will have an attribute of normal data and exports 207 byte attribute information bags by abandoning;
An ATSC data interleaver, it is staggered to export by byte unit that it carries out the ATSC data byte to 207 byte attribute information bags; And
A byte-sign changer, its intercrossed data with byte unit are transformed to symbolic unit to export as the E8-VSB data attribute.
8, E8-VSB receiving system as claimed in claim 7 is characterized in that, wherein the E8-VSB data attribute of symbolic unit by with the E8-VSB sign synchronizationization that in compensator, compensates to be input to E8-VSB channel decoder/multiplexer.
9, E8-VSB receiving system as claimed in claim 7, it is characterized in that, attribute information bag wherein main and that the enhanced multiplexing packet processor is exported comprises the attribute information of byte unit, and wherein E8-VSB byte attribute comprise be used to discern each byte whether with normal data, first enhanced data or the corresponding information of second enhanced data.
10, E8-VSB receiving system as claimed in claim 7 is characterized in that, main and enhanced multiplexing packet processor comprises:
An enhancement mode packet generator, the attribute information bag that it generates 164 byte unit with the attribute information of only indicating first or second enhanced data according to the distribution form and the ratio of the first and second enhanced data packets of information of the current field in the E8-VSB map information of the current field;
An invalid enhancement mode RS encoder, it copies to the enhanced data attribute information bag that has from the enhanced data attribute information of enhancement mode packet generator output by the attribute with each packets of information and expands 20 bytes;
One to carrying out the staggered enhanced data digital multiplexer of enhanced data from the data of invalid enhancement mode RS encoder output;
One is being inserted invalid bit so that the invalid bit expander that first and second enhanced datas are suitable for expanding from the staggered byte of enhanced data digital multiplexer output;
An invalid mpeg header portion inserts device, and the normal data attribute of the byte that it will be corresponding with the mpeg header portion of 4 bytes is inserted in from each 184 byte front of invalid bit expander output; And
A main and enhancement mode packets of information multiplexer, it utilizes the map information of the current field and the territory synchronizing signal is multiplexed and output is inserted enhanced data packets of information and the normal data packets of information that device is exported with 188 byte information bag units from invalid mpeg header portion.
11, E8-VSB receiving system as claimed in claim 10, it is characterized in that, if wherein first enhanced data of 1 byte is transfused to, the invalid bit expander is just by inserting first enhanced data of invalid bit with 1/2 encoding rate expansion input in each space between on the throne, if and wherein second enhanced data of 1 byte is transfused to, the invalid bit expander passes through to repeat everybody twice and inserts invalid bit in the space between everybody and expand second enhanced data of importing with 1/4 encoding rate.
12, E8-VSB receiving system as claimed in claim 10 is characterized in that, is wherein inserted the value indication normal data byte of the mpeg header portion of device insertion by invalid head.
13, E8-VSB receiving system as claimed in claim 10, it is characterized in that, the territory synchronizing signal wherein main and enhancement mode packets of information multiplexer basis is exported from E8-VSB map recovery device, the number (Q) of second enhanced data of the number (H) of first enhanced data of searching 164 byte information bag units and 164 byte information bag units from the E8-VSB map information, with the number (2P) of the packets of information that finds 188 byte unit of distributing to an enhanced data in the VSB territory (2P=2H+4Q), and wherein main and enhancement mode packets of information multiplexer select distribution multichannel also multiplexing normal data packets of information and enhanced data packets of information by the location mode that is included in the E8-VSB map information.
14, E8-VSB receiving system as claimed in claim 1, it is characterized in that wherein compensator provides the E8-VSB data attribute of the current field that device provides and compensates the channel distortion that is included in the VSB restituted signal from the sign determination feedback of E8-VSB channel decoder/demultiplexer by receiving from map information.
15, E8-VSB receiving system as claimed in claim 1 is characterized in that, wherein E8-VSB channel decoder/demultiplexer comprises:
A main data decoder, it is according to the E8-VSB data attribute, and output is carried out Veterbi decoding, 12-road deinterleave, ATSC data byte deinterleave, ATSC RS decoding and ATSC data and is gone randomization to compensator; And
An enhanced data decoder, it is by the ATSC odd even is removed, the ATSC data are gone randomization to carrying out in proper order from the ATSC data release of an interleave E8-VSB data of main data decoder output with packets of information unit, invalid bit removals, enhanced data deinterleave, enhancement mode RS decodes and enhancement mode packets of information multichannel is decoded and separate first and second enhanced datas.
16, E8-VSB receiving system as claimed in claim 15 is characterized in that, wherein the enhanced data decoder comprises:
An ATSC odd even remover, it removes ATSC RS odd even part from the ATSC byte deinterleave packet data of main data decoder output;
ATSC data are removed randomizer, and it goes randomization to removing ATSC RS odd even partial data execution ATSC data;
A main and enhanced multiplexing packet processor, it is by E8-VSB map information that receives the current field and the attribute information bag that the territory synchronizing signal generated and exported the attribute information of the E8-VSB data that comprise byte unit;
An invalid bit remover, it utilizes from the E8-VSB byte attribute of main and the output of enhanced multiplexing packet processor and removes the whole positions of normal data byte and the meaningless position of first and second enhanced datas, is first effective enhancement mode byte and second effective enhancement mode byte so that the data of byte unit are readjusted;
An enhanced data deinterleaver, its enhanced data that is configured the byte unit with significance bit to the output of invalid bit remover is carried out the enhanced data deinterleave;
An enhancement mode RS decoder, it carries out enhancement mode RS decoding to enhancement mode deinterleave data; And
An enhancement mode packets of information demultiplexer, it utilizes from the E8-VSB map information of E8-VSB map recovery device output and territory synchronizing signal enhancement mode RS decoded data is decomposed into the first enhanced data packets of information and the second enhanced data packets of information and output.
17, the E8-VSB data demultiplexing method of E8-VSB receiving system, this E8-VSB receiving system receives the E8-VSB signal that is transmitted by the E8-VSB transfer system, this E8-VSB transfer system is multiplexed with first enhanced data of 1/2 encoding rate coding and second enhanced data of encoding with 1/4 encoding rate with 164 byte information bag units according to the multiplexed form of the E8-VSB map information in the reserve area that inserts the territory synchronizing signal, and further the multiplexed enhanced data packets of information of preliminary treatment is to export as 188 byte transport packet units, and according to the multiplexed form of the E8-VSB map information in the reserve area that inserts the territory synchronizing signal with multiplexed pretreated enhanced data of 188 byte transport packet units and normal data, the E8-VSB data demultiplexing method of this E8-VSB receiving system comprises:
Step (a) is recovered by carrying out frame synchronization, detects the territory synchronizing signal and the territory identification signal of indication even number or odd number fields in the frame of that receive and E8-VSB data demodulation;
Step (b), utilize the synchronous and identification signal in the detection territory of in step (a), detecting and extract and the reserve area that is inserted in the territory synchronizing signal of decoding in the E8-VSB map information, and generate various E8-VSB data attributes;
Step (c) compensates the channel distortion that is included in the VSB modulation signal by receiving various E8-VSB data attributes; And
Step (d), the E8-VSB data attribute of the E8-VSB sign synchronizationization of utilizing E8-VSB map information, E8-VSB data attribute and the territory synchronizing signal of E8-VSB map recovery device and receiving and in step (c), compensate, and signal decoding normal data, first enhanced data and second enhanced data from compensating.
18, E8-VSB data demultiplexing method as claimed in claim 17, it is characterized in that, wherein the E8-VSB map information is encoded with in the reserve area that is inserted into the territory synchronizing signal by Kerdock, and is included in the information of the multiplexed form of the multiplexed form of each packets of information number, first and second enhanced datas of first and second enhanced datas that transmit on the territory and enhanced data and master data.
19, E8-VSB data demultiplexing method as claimed in claim 17 is characterized in that, step (b) comprising:
Step (b-1), the data symbol that utilizes the territory synchronizing signal to export from demodulator extracts the E8-VSB map information that is inserted in the synchronizing signal of territory;
Step (b-2) is by the map information of Kerdock decoding algorithm decoding extraction;
Step (b-3) is judged the E8-VSB map information of the current field from the E8-VSB map information of Kerdock decoding by territory synchronizing signal and territory identification signal;
Step (b-4) is by the E8-VSB map information and the territory synchronizing signal generation E8-VSB data attribute of the current field.
20, E8-VSB data demultiplexing method as claimed in claim 19 is characterized in that, step (b-4) comprises step:
By E8-VSB map information and the territory synchronizing signal generation of step (b-3) output and the 188 byte attribute information bags that output comprises the attribute information of E8-VSB data that receive current mapping decision device output;
Be added to 188 byte attribute information bags corresponding to first byte of the input information bag of 0x47 MPEG sync byte and 20 bytes that will have an attribute of normal data and export 207 byte attribute information bags by abandoning;
It is staggered and export by byte unit that 207 byte attribute information bags are carried out the ATSC data byte; And
The intercrossed data of byte unit is transformed to symbolic unit and exports as E8-VSB data symbol attribute.
21, E8-VSB data demultiplexing method as claimed in claim 20 is characterized in that, wherein attribute information bag generation step comprises step:
According to the distribution form of the first and second enhanced data packets of information of the current field in the E8-VSB map information of the current field and ratio and generate the enhanced data attribute information bag of 164 byte unit with the attribute information of only indicating first or second enhanced data;
Expand 20 bytes by each packets of information attribute being copied to the enhanced data attribute information bag that only has the enhanced data attribute information;
It is staggered that the odd even growth data of spread step output is carried out enhanced data;
Expand the staggered byte of the staggered step output of enhanced data to cooperate first and second enhanced datas by in staggered byte, inserting invalid bit;
The 4 byte mpeg header portions value of indication normal data byte is inserted in each 184 byte of invalid bit spread step output; And
Multiplexed and output has the normal data packets of information and the enhanced data packets of information of the invalid mpeg header portion of insertion with 188 byte information bag units to utilize the current field map information and territory synchronizing signal.
22, E8-VSB data demultiplexing method as claimed in claim 21, it is characterized in that, wherein in the invalid bit spread step, if first enhanced data of 1 byte is transfused to, the invalid bit expander is just by inserting first enhanced data of predetermined invalid bit with 1/2 encoding rate expansion input in each space between on the throne, if and wherein second enhanced data of 1 byte is transfused to, the invalid bit expander by repeat everybody twice and on the throne between each space in insert second enhanced data of predetermined invalid bit with 1/4 encoding rate expansion input.
23, E8-VSB data demultiplexing method as claimed in claim 21, it is characterized in that, wherein in the multiplexed step of E8-VSB packets of information, according to territory synchronizing signal from the output of E8-VSB map recovery device, the number (Q) of second enhanced data of the number (H) of first enhanced data of searching 164 byte information bag units and 164 byte information bag units from the E8-VSB map information, with the number (2P) of the packets of information that finds 188 byte unit that are assigned to the whole enhanced datas in the VSB territory (2P=2H+4Q), and wherein normal data packets of information and enhanced data packets of information are by according to being included in that location mode in the E8-VSB map information is selected to be distributed and multiplexed.
24, E8-VSB data demultiplexing method as claimed in claim 17 is characterized in that, step (d) comprising:
Step (d-1) goes randomization to carry out the master data decoding by Viterbi decoding, 12-road deinterleave, ATSC data byte deinterleave, ATSC RS decoding and the ATSC data carried out in proper order according to the E8-VSB data attribute the E8-VSB symbol of compensation; And
Step (d-2), by in the step (d-1) with the ATSC deinterleaving data E8-VSB data of packets of information unit output carry out in proper order that the ATSC odd even is removed, the ATSC data are gone randomization, invalid bit is removed, enhanced data is staggered, enhancement mode RS decoding and enhancement mode packets of information multichannel are decoded separation first and second enhanced datas.
25, E8-VSB data demultiplexing method as claimed in claim 24 is characterized in that, step (d-2) comprises step:
From step (d-1), remove ATSCRS odd even part in the ATSC byte deinterleave packet data of output;
The data execution ATSC data that ATSC RS odd even is partly removed are gone randomization;
By E8-VSB map information that receives the current field and the attribute information bag that the territory synchronizing signal generated and exported the attribute information that comprises byte unit;
Utilize E8-VSB data byte Attribute Recognition ATSC data to go whether the data of the byte unit of randomization step output are normal data byte, the first enhanced data byte or the second enhanced data byte, removing the whole positions of normal data byte and the invalid bit of the first and second enhanced data bytes then is first effective enhancement mode byte and second effective enhancement mode byte so that the data of byte unit are readjusted;
The enhanced data execution enhanced data that configuration in the step of readjusting first and second effective enhancement mode bytes is had significance bit is staggered;
Enhanced data deinterleave data are carried out enhancement mode RS decoding; And
Utilize E8-VSB map information and territory synchronizing signal, enhancement mode RS decoded data is separated into the first enhanced data packets of information and the second enhanced data packets of information and output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0083688A KR100519361B1 (en) | 2003-11-24 | 2003-11-24 | Digital Enhanced 8-VSB receiving system and E8-VSB data demultiplexing method in a E8-VSB receiving system |
| KR1020030083688 | 2003-11-24 |
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| CN201010149658A Division CN101841668A (en) | 2003-11-24 | 2004-11-24 | In DTV receiver, handle the method for digital television signal |
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| CN201010149658A Pending CN101841668A (en) | 2003-11-24 | 2004-11-24 | In DTV receiver, handle the method for digital television signal |
| CNA2004100916601A Pending CN1622606A (en) | 2003-11-24 | 2004-11-24 | Digital E8-VSB reception system and E8-VSB data demultiplexing method |
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| CN201010149658A Pending CN101841668A (en) | 2003-11-24 | 2004-11-24 | In DTV receiver, handle the method for digital television signal |
Country Status (5)
| Country | Link |
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| KR (1) | KR100519361B1 (en) |
| CN (2) | CN101841668A (en) |
| BR (1) | BRPI0405263A (en) |
| CA (1) | CA2488327C (en) |
| MX (1) | MXPA04011650A (en) |
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| CN1960473B (en) * | 2005-10-31 | 2010-05-12 | Lg电子株式会社 | Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver |
| CN108832982A (en) * | 2018-05-30 | 2018-11-16 | 毛述春 | A kind of time-frequency distributions modulator approach for base station signal |
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-
2003
- 2003-11-24 KR KR10-2003-0083688A patent/KR100519361B1/en not_active IP Right Cessation
-
2004
- 2004-11-23 MX MXPA04011650A patent/MXPA04011650A/en active IP Right Grant
- 2004-11-23 CA CA2488327A patent/CA2488327C/en not_active Expired - Fee Related
- 2004-11-24 BR BR0405263-3A patent/BRPI0405263A/en not_active IP Right Cessation
- 2004-11-24 CN CN201010149658A patent/CN101841668A/en active Pending
- 2004-11-24 CN CNA2004100916601A patent/CN1622606A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960473B (en) * | 2005-10-31 | 2010-05-12 | Lg电子株式会社 | Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver |
| US7830974B2 (en) | 2005-10-31 | 2010-11-09 | Lg Electronics, Inc. | Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver |
| US8249183B2 (en) | 2005-10-31 | 2012-08-21 | Lg Electronics Inc. | Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver |
| CN108832982A (en) * | 2018-05-30 | 2018-11-16 | 毛述春 | A kind of time-frequency distributions modulator approach for base station signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2488327C (en) | 2010-08-17 |
| BRPI0405263A (en) | 2005-07-19 |
| KR100519361B1 (en) | 2005-10-07 |
| CN101841668A (en) | 2010-09-22 |
| CA2488327A1 (en) | 2005-05-24 |
| MXPA04011650A (en) | 2005-07-05 |
| KR20050049923A (en) | 2005-05-27 |
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