CN109218248A - Demultiplexer systems - Google Patents
Demultiplexer systems Download PDFInfo
- Publication number
- CN109218248A CN109218248A CN201710511876.6A CN201710511876A CN109218248A CN 109218248 A CN109218248 A CN 109218248A CN 201710511876 A CN201710511876 A CN 201710511876A CN 109218248 A CN109218248 A CN 109218248A
- Authority
- CN
- China
- Prior art keywords
- solution
- module
- data
- demultiplexer
- decoder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010606 normalization Methods 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims description 28
- 238000013507 mapping Methods 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 claims description 10
- 230000005465 channeling Effects 0.000 claims description 6
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 36
- 238000000034 method Methods 0.000 description 18
- 239000012792 core layer Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009432 framing Methods 0.000 description 4
- 238000011017 operating method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010399 three-hybrid screening Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
- H04L27/3427—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation
- H04L27/3438—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation using an underlying generalised cross constellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440227—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by decomposing into layers, e.g. base layer and one or more enhancement layers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Error Detection And Correction (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The present invention provides a kind of demultiplexer systems comprising demultiplexing module, solution BICM module and feedback module, wherein the demultiplexing module includes at least solution normalization, bit interleaver, constellation mapper and demultiplexer；The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；The feedback module includes at least: decoder, bit interleaver and constellation mapper；In compared with the prior art, estimation for the transmission planisphere of the upper layer data in layered reuse mode, it is essentially all to use directly to obtain by sentencing the input planisphere after normalization firmly, this mode with Channel Physical environment deterioration, sentencing directly on above-mentioned input planisphere firmly can seem more and more difficult, and the error probability sentenced firmly can be significantly raised, thus greatly reduces the decoding receptivity of lower data；And in the present invention, due to during the reconstruct of the transmission constellation data of upper layer data, the gain for increasing feedback fraction, introducing decoder, so the quality reconstruction substantially increased, to significantly improve the decoding performance of lower data.
Description
Technical field
The present invention relates to multimedia transport technologies, and in particular, to a kind of solution in multimedia Delamination Transmission system point
Layer multiplexing receiving device.
Background technique
With the continuous promotion that the rapid development of multimedia technology and multimedia transport technology require, in multimedia transmission
It in system, generally requires simultaneously to transmit different types of data flow, in order to realize this demand, existing Transmission system
In include that usually there are several types of multiplexing methods for transmitting terminal and corresponding receiving end:
1, time-multiplexed (TDM:Time Division Multiplexing)；
2, channeling (FDM:Frequency Division Multiplexing)；
3, layered reuse (LDM:Layered Division Multiplexing).
By taking United States of america digital television standard ATSC3.0 system as an example, transmitter independently compiles every road transmitting data stream
The operations such as code, Bit Interleave, planisphere mapping merge aforementioned treated each circuit-switched data stream then by multiplex system
After issue.TDM multiplex system is mapped to different data flows on different time resources, and FDM multiplex system is will be different
Data flow be mapped in different frequency resources, and LDM multiplex system is then that different data flows is mapped to different layers
On.Certainly, in practice these three multiplex modes above-mentioned either be used alone, be also possible to be used in combination.
For LDM, often there is the requirements of different robustness or rate for the data flow of different layers.For example, most
Upper layer is the best audio content of robustness, and next layer is video content；Or for another example, top layer is a star turn,
Lower layer is some attached programs relevant to star turn or the other layered mode of other multilayers.
However, the case where corresponding above-mentioned transmitter, in receivers, demultiplexer systems then generally use directly will normalization
Input planisphere afterwards passes to subsequent solution BICM module, can be realized the parsing of upper layer data, and such mode, described
The influence of lower data is then seen as noise；However, if it is desired to parse lower data, then the transmission to upper layer data is needed
Planisphere is estimated, and subtracts its influence in input planisphere after normalization, then passes to subsequent solution BICM module.
As shown in fig.1, in existing technical solution, estimation for the transmission planisphere of upper layer data is substantially all
It is to use directly to obtain by sentencing the input planisphere after normalization firmly.Although this mode logic is simple, and can
To obtain the demultiplexing of the upper and lower data simultaneously as a result, still with the deterioration of Channel Physical environment, directly above-mentioned
The error probability that sentencing on input planisphere firmly can seem more and more difficult, and sentence firmly can be significantly raised, thus greatly reduces
The decoding receptivity of lower data.
Presence in view of the above problems, it is a kind of that the mode of operation of the prior art can effectively be overcome to carry out input planisphere
The invention of decoding performance demultiplexer systems sentencing defect firmly, can effectively improve lower data is imperative.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of demultiplexer systems, difference
Meet for the two in individual layered reuse (LDM:Layered Division Multiplexing) mode and three
Hybrid multiplex mode.Deplexing method of the present invention has simple and reasonable, and applicable performance is good, it is easy to accomplish and can effectively mention
The decoding performance of high lower data.
Demultiplexer systems of the present invention have simple and reasonable, and applicable performance is good, it is easy to accomplish and can effectively improve lower layer
The decoding performance of data.
In order to achieve the above objects and other related objects, the present invention provides a kind of demultiplexer systems comprising demultiplexing mould
Block, solution BICM module and feedback module, wherein
The demultiplexing module includes at least solution normalization, bit interleaver, constellation mapper and demultiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
The demultiplexer systems, the multiplex mode that the demultiplexer systems are directed to is layered reuse, and is included at least
First layer data and two layers of the second layer data multiplexing.
The demultiplexer systems, the demultiplexing module carry out solving normalized place to input data and signal-to-noise ratio
Reason, the data after obtaining solution normalization are the signal-to-noise ratio after reconciliation normalization, after the data reconciliation normalization after solution normalization
Signal-to-noise ratio export BICM module to solution, carry out solution planisphere mapping, solve Bit Interleave, decoded operation.
The demultiplexer systems, the feedback module are self solved to extract in the decoder for completing decoding in BICM module and be translated
Bit interleaver of the result feed back input to demultiplexing module after code, constellation mapper, then carry out Bit Interleave, planisphere
Mapping, the transmission constellation data for reconstructing the first layer data enter back into demultiplexer.
A kind of demultiplexer systems comprising: demultiplexing module, solution BICM module and feedback module, wherein
The demultiplexing module, which includes at least, solves time-multiplexed module, solution normalization, bit interleaver, constellation mapper
And demultiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
The demultiplexer systems, which is characterized in that the multiplex mode that the demultiplexer systems are directed to is time-multiplexed and divides
The compound multiplex mode of layer multiplexing, and layered reuse includes at least the first layer data and two layers of the second layer data multiplexing.
The demultiplexer systems, the demultiplexing module carry out input data and signal-to-noise ratio to solve time-multiplexed and solution
Normalized processing, the data that obtain that treated are and signal-to-noise ratio, will treated that data are and signal-to-noise ratio exports and gives solution BICM
Module carries out solution planisphere mapping, solves Bit Interleave, decoded operation；
The result feedback that the feedback module self solves after extracting decoding in the decoder for completing decoding in BICM module is defeated
Enter the bit interleaver to demultiplexing module, constellation mapper, then carry out Bit Interleave, planisphere mapping reconstructs first layer
The transmission constellation data of data enters back into demultiplexer.
A kind of demultiplexer systems comprising: demultiplexing module, solution BICM module and feedback module, wherein
The demultiplexing module includes at least solution channeling module, solution normalization, bit interleaver, constellation mapper
And demultiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
The demultiplexer systems, multiplex mode channeling that the demultiplexer systems are directed to and layered reuse are answered
Multiplex mode is closed, and layered reuse includes at least the first layer data and two layers of the second layer data multiplexing.
The demultiplexer systems, the demultiplexing module carries out solution channeling to input data and signal-to-noise ratio and solution is returned
One processing changed, the data that obtain that treated are and signal-to-noise ratio, will treated that data are and signal-to-noise ratio exports and gives solution BICM mould
Block carries out solution planisphere mapping, solves Bit Interleave, decoded operation；
The result feedback that the feedback module self solves after extracting decoding in the decoder for completing decoding in BICM module is defeated
Enter the bit interleaver to demultiplexing module, constellation mapper, then carry out Bit Interleave, planisphere mapping reconstructs first layer
The transmission constellation data of data enters back into demultiplexer.
As described above, demultiplexer systems of the invention, have the advantages that
In compared with the prior art, estimation for the transmission planisphere of upper layer data is essentially all using directly logical
It crosses to sentence the input planisphere after normalization firmly and obtain, in the present invention, due to the transmission planisphere number in upper layer data
According to reconstruct during, increase feedback fraction, introduce the gain of decoder, so the quality reconstruction substantially increased,
To significantly improve the decoding performance of lower data.
Detailed description of the invention
Fig. 1 is the structural framing schematic diagram of the demultiplexer systems of the prior art.
Fig. 2 is the processing flow schematic diagram of demultiplexer systems of the present invention in single LDM.
Fig. 3 is the processing flow schematic diagram of demultiplexer systems of the present invention in TDM+LDM.
Fig. 4 is the processing flow schematic diagram of demultiplexer systems of the present invention in FDM+LDM.
Fig. 5 is the structural framing schematic diagram of demultiplexer systems of the present invention in single LDM.
Fig. 6 is the structural framing schematic diagram of demultiplexer systems of the present invention in TDM+LDM.
Fig. 7 is the structural framing schematic diagram of demultiplexer systems of the present invention in FDM+LDM.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
It please refers to shown in legend 2-7, is that the specific embodiment of the invention for convenience of description as follows will be with United States of america digital television
In the Transmission system of standard ATSC3.0 LDM multiplexing for be illustrated, data flow with PLP (Physical LayerPipe,
Physical layer pipe) it is stated, LDM is then by taking the first layer data and two layers of the second layer data as an example, on the first layer data is also referred to as
Layer data stream is stated with Core Layer PLP (core layer), and the second layer data is also referred to as lower data stream Enhanced
Layer PLP (enhancement layer) statement.
In the transmitter system of the transmitting terminal of Transmission system, layered reuse uses formula SLDM=β (SC+αSE) realize,
In, SCData after representing the mapping of Core Layer PLP planisphere, SEAfter representing the mapping of Enhanced Layer PLP planisphere
Data, SLDMThe data after LDM multiplexing are represented, β represents LDM normalization factor, and α represents Enhanced Layer in LDM
PLP decay factor.
For the multiplex mode and multiplexer mode of above-mentioned originator system: three kinds of multiplex modes either be used alone,
It is also possible to the case where being used in combination, the case where exclusive use and compound use will be introduced respectively respectively as follows.
Please refer to shown in attached drawing 2 and attached drawing 5: the corresponding demultiplexing mode for independent LDM can use following reality
It applies a system structure and operating procedure is introduced:
Demultiplexer systems structure includes at least following module:
A kind of demultiplexer systems comprising demultiplexing module, solution BICM (Bit-Interleaved and Coded
Modulation) module and feedback module, the demultiplexing module include at least solution normalization, bit interleaver, constellation
Mapper and demultiplexer；Module is at least by the solution BICM (Bit-Interleaved and Coded Modulation)
Including solution constellation mapper, solution bit interleaver and decoder；I.e. each circuit-switched data stream is in the demultiplexing Jing Guo demultiplexing module
Processing after processing also includes at least the mapping of solution planisphere, solution Bit Interleave, decoding etc., herein unified solution BICM
(Bit-Interleaved and Coded Modulation) module is indicated.The feedback module includes at least decoding
Device, bit interleaver and constellation mapper.Self solve BICM (Bit-Interleaved and Coded Modulation) mould
Bit interleaver, constellation of the result feed back input in the decoder of decoding after extraction decoding to demultiplexing module are completed in block
Mapper, then Bit Interleave (without recompiling, hereinafter will do it explanation) is carried out, planisphere mapping reconstructs Core
The transmission constellation data of Layer PLPEnter back into demultiplexer.
Specific data processing step is as follows:
Step 1: the data S ' for inputting demultiplexer systemsLDMWith Signal to Noise Ratio (SNR) (or noise power σ2(by prime module
That is demultiplexing module measurement obtains, S 'LDMIt is all the previous stage module of demultiplexer --- EQ i.e. balanced device with Signal to Noise Ratio (SNR)
Export result.Balanced device EQ export the two as a result, and the calculation methods of the two results is common knowledge in the industry, not at this
Text discusses in range, repeats no more)) it carries out solving normalized processing, the data after obtaining solution normalization areAfter solution normalization
Signal-to-noise ratio be(or noise power).In above procedure, the solution normalizing of Core Layer PLP data and Signal to Noise Ratio (SNR)
Change processing can be realized specifically using following formula:
Step 2: by the data after solution normalizationSignal-to-noise ratio after solution normalization(or the noise function after solution normalization
Rate) export and give subsequent module solution BICM (Bit-Interleaved and Coded Modulation) module, carry out solution star
Seat figure mapping solves Bit Interleave, the operation such as decoding.
Step 3: waiting the decoding in solution BICM (Bit-Interleaved and Coded Modulation) module complete
At, extract decoding after as a result, by this result feed back to demultiplexing module, then carry out Bit Interleave (without recompiling, text
In be described, details are not described herein again), planisphere mapping, reconstruct the transmission constellation data of Core Layer PLPCertainly
Equally, in above procedure, decoder can be by taking LDPC (Low-Density Parity Check) decoder as an example, and from decoder
What place obtained is the bit stream sentenced by iterative decoding and than ultrahard, but do not delete check bit, and so there is no need to will decode result again
It is secondary to pass through coded treatment.
Step 4: sending constellation data using the above-mentioned Core Layer PLP reconstructedTo the number after solution normalization
According toThe processing demultiplexed: the Core Layer PLP after solution normalization, the inside contains Enhanced LayerPLP's
Component, the process of demultiplexing exactly separate the component of Enhanced Layer PLP, obtain EnhancedLayer PLP's
Constellation dataThe demultiplexing process of Enhanced Layer PLP data is carried out using lower formula:
Step 5: by the constellation data of Enhanced Layer PLPDemultiplexing module input signal-to-noise ratio SNR (or make an uproar
Acoustical power σ2, i.e. the Signal to Noise Ratio (SNR) of prime module EQ output, the SNR (or σ2) due to only differing a multiple with input value,
Subsequent decoding be will not influence as a result, so directlying adopt input value) it exports to subsequent solution BICM (Bit-
Interleaved and Coded Modulation) module, it carries out solution planisphere and maps, solution Bit Interleave, the processing of decoding,
Obtain the decoding result of Enhanced Layer PLP.
Above-mentioned returns solution due to increasing feedback arrangement the processing mode of Enhanced Layer PLP data
The component for the Enhanced Layer PLP for including inside Core Layer PLP after one change, the process of demultiplexing separate
The component of Enhanced Layer PLP, obtains the constellation data of Enhanced Layer PLPAfter reprocessed, such as
This compares is significantly improved and being sentenced firmly to the input planisphere after normalization with the direct of the prior art
The decoding receptivity of lower data.
Continue, the corresponding compound multiplex mode for TDM+LDM, data can be carried out using following embodiment and demultiplexed
System structure and step introduction:
Please refer to shown in attached drawing 3 and attached drawing 6: for the compound multiplex mode of TDM+LDM, demultiplexer systems structure is at least wrapped
Include following module:
A kind of demultiplexer systems comprising demultiplexing module, solution BICM (Bit-Interleaved and Coded
Modulation) module and feedback module, the demultiplexing module include at least solution TDM module, solution normalization, bit friendship
Knit device, constellation mapper and demultiplexer；Solution BICM (the Bit-Interleaved and Coded
Modulation) module includes at least solution constellation mapper, solution bit interleaver and decoder；I.e. each circuit-switched data stream is passing through
Processing after the demultiplexing process of demultiplexing module also includes at least the mapping of solution planisphere, solution Bit Interleave, decoding etc., herein
Middle unification is indicated with solution BICM (Bit-Interleaved and Coded Modulation) module.
Operating procedure is as follows:
Step 1: first to the data S ' receivedLDMWith Signal to Noise Ratio (SNR) (or noise power σ2) carry out solution TDM processing,
Obtain the data S " after solution TDMLDMWith Signal to Noise Ratio (SNR) " (or noise power σ "2)。
Step 2: the data S " after solving TDMLDMWith Signal to Noise Ratio (SNR) " (or noise power σ "2) in, to Enhanced
The data and signal-to-noise ratio (or noise power) of the position Layer PLP, carry out solving normalized processing, obtain solution normalization
Data afterwardsSignal-to-noise ratio(or noise power).In above procedure, Core Layer PLP data and Signal to Noise Ratio (SNR)
Solution method for normalizing specifically use following formula to carry out:
Step 3: by the data after solution normalizationSignal-to-noise ratio(or noise power) export to subsequent solution BICM
(Bit-Interleaved and Coded Modulation) module carries out solution planisphere mapping, solves Bit Interleave, decoding etc.
Operation.
Step 4: waiting the decoding in solution BICM (Bit-Interleaved and Coded Modulation) module complete
At after extraction decoding as a result, this result is fed back to demultiplexing module, progress Bit Interleave, planisphere mapping reconstructs
The transmission constellation data of Core Layer PLPIn above procedure, decoder can be with LDPC (Low-Density
Parity Check) for decoder, and what is obtained from decoder is to sentence by iterative decoding and than ultrahard, but do not delete school
Test the bit stream of bit.So there is no need to will decode result to again pass by coded treatment.
Step 5: utilizing the transmission constellation data of the above-mentioned Core Layer PLP reconstructedAfter solution normalization
DataIn all Enhanced Layer PLP corresponding positions data, the processing demultiplexed obtains Enhanced
The constellation data of Layer PLPThe demultiplexing of Enhanced Layer PLP data is carried out using following formula:
Step 6: by the constellation data of Enhanced Layer PLPAnd Enhanced Layer PLP institute is in place
Demultiplexing module input signal-to-noise ratio SNR (or the noise power σ set2, SNR (or σ2) due to only differing a multiple with input value,
Subsequent decoding be will not influence as a result, so directlying adopt input value) it exports to subsequent module: solution BICM (Bit-
Interleaved and Coded Modulation) module, it carries out solution planisphere and maps, solution Bit Interleave, the processing of decoding,
Obtain the decoding result of Enhanced Layer PLP.
Continue, the corresponding compound multiplex mode for FDM+LDM, is carried out using following system structure and operating procedure
Data demultiplexing process:
Please refer to shown in attached drawing 4 and attached drawing 7: for the compound multiplex mode of FDM+LDM, demultiplexer systems structure is at least wrapped
Include following module:
A kind of demultiplexer systems comprising demultiplexing module, solution BICM (Bit-Interleaved and Coded
Modulation) module and feedback module, the demultiplexing module include at least solution FDM module, solution normalization, bit friendship
Knit device, constellation mapper and demultiplexer；Solution BICM (the Bit-Interleaved and Coded
Modulation) module includes at least solution constellation mapper, solution bit interleaver and decoder；I.e. each circuit-switched data stream is passing through
Processing after the demultiplexing process of demultiplexing module also includes at least the mapping of solution planisphere, solution Bit Interleave, decoding etc., herein
Middle unification is indicated with solution BICM (Bit-Interleaved and Coded Modulation) module.
Operating procedure is as follows:
Step 1: the data S ' for inputting demultiplexing moduleLDMWith Signal to Noise Ratio (SNR) (or noise power σ2), traversal is all
Core Layer PLP is extracted and is recombinated (such as the solution Subslice in ATSC3.0 system of the data in frequency resource where it
Operation), obtain solution FDM (recombination reconciliation FDM method be described in ATSC3.0 agreement) after S "LDMAnd signal-to-noise ratio
SNR " (or noise power σ "2) after data.
Step 2: all Enhanced Layer PLP of the data after solution FDM in traversal above-mentioned steps 1, to solution
S after FDM "LDMWith Signal to Noise Ratio (SNR) " (or noise power σ "2) in the position Enhanced Layer PLP data and
Signal-to-noise ratio (or noise power) carries out solving normalized processing, the data after obtaining solution normalizationSignal-to-noise ratio(or
Noise power).In above procedure, the normalized processing of the solution of Core Layer PLP data and Signal to Noise Ratio (SNR) is specific to be used
Lower formula carries out:(originator formula is in specific embodiment above-mentioned
In described, details are not described herein).
Step 3: by the data after solution normalizationSignal-to-noise ratio(or noise power) in all Core
The corresponding part LayerPLP, which exports, gives subsequent solution BICM (Bit-Interleaved and Coded Modulation) module,
Solution planisphere mapping is carried out, Bit Interleave, the operation such as decoding are solved.
Step 4: waiting decoder to complete the decoding of all Core Layer PLP, extract the knot after decoding from decoder
This result is fed back to demultiplexing module by fruit, carries out Bit Interleave, and planisphere mapping reconstructs the hair of Core Layer PLP
Send constellation dataIn above procedure, decoder can be with LDPC (Low-Density Parity Check) decoder
Example, and what is obtained from decoder is the bit stream sentenced by iterative decoding and than ultrahard, but do not delete check bit.So there is no need to
Decoding result is again passed by into coded treatment.
Step 5: utilizing the transmission constellation data for reconstructing Core Layer PLPTo the data after solution normalizationIn all positions Enhanced Layer PLP data, the processing demultiplexed obtains Enhanced
The constellation data of LayerPLPThe demultiplexing of Enhanced Layer PLP data is carried out using following formula:SNR (or σ2) due to only differing a multiple with input value, will not influence subsequent decoding as a result, so
Directly adopt input value.
Step 6: by the constellation data of Enhanced Layer PLPAnd corresponding part Signal to Noise Ratio (SNR) " (or
Noise power σ "2) export to subsequent solution BICM module, solution planisphere mapping is carried out, solves Bit Interleave, the processing of decoding obtains
To the decoding result of Enhanced Layer PLP.
In conclusion in compared with the prior art,ByDirectly sentence firmly and get, in above procedure, due toWeight
It during structure, increases feedback fraction, introduce the gain of decoder, so substantially increasingQuality reconstruction, thus
Significantly improve the decoding performance of lower data.
Above-described embodiment describes the demultiplexing mode to independent LDM, the compound demultiplexing mode for TDM+LDM respectively
And the compound demultiplexing mode for FDM+LDM, it is similar with above-mentioned principle for other combinations, it is no longer superfluous herein
It states.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of demultiplexer systems, it is characterised in that: it includes demultiplexing module, solution BICM module and feedback module, wherein
The demultiplexing module includes at least solution normalization, bit interleaver, constellation mapper and demultiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
2. demultiplexer systems as described in claim 1, which is characterized in that the multiplex mode that the demultiplexer systems are directed to is point
Layer multiplexing, and the layered reuse includes at least the first layer data and two layers of the second layer data multiplexing.
3. demultiplexer systems as described in claim 1, which is characterized in that the demultiplexing module is to input data and signal-to-noise ratio
It carries out solving normalized processing, the data after obtaining solution normalization are the signal-to-noise ratio after reconciliation normalization, after solution normalization
Signal-to-noise ratio after data reconciliation normalization, which exports, gives solution BICM module, carries out solution planisphere mapping, solves Bit Interleave, decoding.
4. demultiplexer systems as claimed in claim 2, which is characterized in that the feedback module, which self solves, to be completed to translate in BICM module
Bit interleaver of the result feed back input to demultiplexing module after decoding, constellation mapper are extracted in the decoder of code, then
Bit Interleave, planisphere mapping are carried out, the transmission constellation data for reconstructing the first layer data enters back into demultiplexer.
5. a kind of demultiplexer systems, characterized in that it comprises: demultiplexing module, solution BICM module and feedback module,
In,
The demultiplexing module, which includes at least, solves time-multiplexed module, solution normalization, bit interleaver, constellation mapper and solution
Multiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
6. demultiplexer systems as claimed in claim 5, which is characterized in that when the multiplex mode that the demultiplexer systems are directed to is
Between multiplexing and layered reuse compound multiplex mode, and the layered reuse include at least the first layer data and the second layer data two
Layer multiplexing.
7. demultiplexer systems as claimed in claim 6, it is characterised in that:
The demultiplexing module carries out input data and signal-to-noise ratio to solve the time-multiplexed and normalized processing of solution, after obtaining processing
Data and signal-to-noise ratio, be and signal-to-noise ratio exports and gives solution BICM module to carry out treated data solution planisphere mapping, solve ratio
Spy interweaves, decoding；
The result feed back input that the feedback module self solves after extracting decoding in the decoder for completing decoding in BICM module arrives
The bit interleaver of demultiplexing module, constellation mapper, then Bit Interleave is carried out, planisphere mapping reconstructs the first layer data
Transmission constellation data enter back into demultiplexer.
8. a kind of demultiplexer systems, characterized in that it comprises: demultiplexing module, solution BICM module and feedback module,
In,
The demultiplexing module includes at least solution channeling module, solution normalization, bit interleaver, constellation mapper and solution
Multiplexer；
The solution BICM module includes at least solution constellation mapper, solution bit interleaver and decoder；
The feedback module includes at least: decoder, bit interleaver and constellation mapper.
9. demultiplexer systems as claimed in claim 8, which is characterized in that the multiplex mode that the demultiplexer systems are directed to is frequency
The compound multiplex mode of rate multiplexing and layered reuse, and the layered reuse includes at least the first layer data and the second layer data two
Layer multiplexing.
10. demultiplexer systems as claimed in claim 9, it is characterised in that:
The demultiplexing module carries out solution channeling and the normalized processing of solution to input data and signal-to-noise ratio, after obtaining processing
Data and signal-to-noise ratio, treated data and signal-to-noise ratio are exported and give solution BICM module, solution planisphere mapping is carried out, solves bit
Interweave, decoding；
The result feed back input that the feedback module self solves after extracting decoding in the decoder for completing decoding in BICM module arrives
The bit interleaver of demultiplexing module, constellation mapper, then Bit Interleave is carried out, planisphere mapping reconstructs the first layer data
Transmission constellation data enter back into demultiplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710511876.6A CN109218248A (en) | 2017-06-29 | 2017-06-29 | Demultiplexer systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710511876.6A CN109218248A (en) | 2017-06-29 | 2017-06-29 | Demultiplexer systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109218248A true CN109218248A (en) | 2019-01-15 |
Family
ID=64976526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710511876.6A Withdrawn CN109218248A (en) | 2017-06-29 | 2017-06-29 | Demultiplexer systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109218248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218792A (en) * | 2017-06-29 | 2019-01-15 | 上海数字电视国家工程研究中心有限公司 | Deplexing method |
| CN112260698A (en) * | 2019-07-22 | 2021-01-22 | 上海高清数字科技产业有限公司 | Dynamic correction factor configuration method in LDPC decoder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774548A (en) * | 1995-09-05 | 1998-06-30 | Hitachi, Ltd. | Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof |
| EP2388967B1 (en) * | 2009-01-23 | 2013-08-21 | LG Electronics Inc. | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal. |
| WO2014185724A1 (en) * | 2013-05-15 | 2014-11-20 | 엘지전자 주식회사 | Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method for transmitting broadcast signal and method for receiving broadcast signal |
| CN104767587A (en) * | 2015-03-10 | 2015-07-08 | 重庆邮电大学 | Compressive sensing channel estimation method based on united channel coding and decoding under OFDM system |
| CN105790888A (en) * | 2015-01-14 | 2016-07-20 | 塑料光纤科技发展有限公司 | Two-level coset coding scheme for gigabit Ethernet over plastic optical fibre |
| CN106416084A (en) * | 2014-05-21 | 2017-02-15 | 三星电子株式会社 | Transmitting apparatus and interleaving method thereof |
| CN109218792A (en) * | 2017-06-29 | 2019-01-15 | 上海数字电视国家工程研究中心有限公司 | Deplexing method |
-
2017
- 2017-06-29 CN CN201710511876.6A patent/CN109218248A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774548A (en) * | 1995-09-05 | 1998-06-30 | Hitachi, Ltd. | Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof |
| EP2388967B1 (en) * | 2009-01-23 | 2013-08-21 | LG Electronics Inc. | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal. |
| WO2014185724A1 (en) * | 2013-05-15 | 2014-11-20 | 엘지전자 주식회사 | Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method for transmitting broadcast signal and method for receiving broadcast signal |
| CN106416084A (en) * | 2014-05-21 | 2017-02-15 | 三星电子株式会社 | Transmitting apparatus and interleaving method thereof |
| CN105790888A (en) * | 2015-01-14 | 2016-07-20 | 塑料光纤科技发展有限公司 | Two-level coset coding scheme for gigabit Ethernet over plastic optical fibre |
| CN104767587A (en) * | 2015-03-10 | 2015-07-08 | 重庆邮电大学 | Compressive sensing channel estimation method based on united channel coding and decoding under OFDM system |
| CN109218792A (en) * | 2017-06-29 | 2019-01-15 | 上海数字电视国家工程研究中心有限公司 | Deplexing method |
Non-Patent Citations (2)
| Title |
|---|
| JINCHEN BAO等: "Performance Analysis of Uplink Sparse Code Multiple Access with Iterative Multiuser Receiver", 《IEEE ICC 2017 WIRELESS COMMUNICATIONS SYMPOSIUM》 * |
| ZTE: "Discussion on channel coding and modulation for new radio interface", 《3GPP TSG RAN WG1 #84BIS R1-162229》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218792A (en) * | 2017-06-29 | 2019-01-15 | 上海数字电视国家工程研究中心有限公司 | Deplexing method |
| CN112260698A (en) * | 2019-07-22 | 2021-01-22 | 上海高清数字科技产业有限公司 | Dynamic correction factor configuration method in LDPC decoder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69931570T2 (en) | Unequal error protection for digital broadcasting with channel classification | |
| CN105981318B (en) | Broadcast singal sending device, broadcast receiver, broadcast singal sending method and broadcast signal received method | |
| CN104320213B (en) | Transmitting/receiving system and in transmitting/receiving system processing data method | |
| CN105122655B (en) | For the system and method for the advanced iterative decoding and channel estimation of Concatenated Coding System | |
| CN105247794B (en) | Iterative forward error correction for FM in-band on-channel radio broadcasting system decodes | |
| CN107005359A (en) | The broadcast singal frame generation apparatus and broadcast singal frame generating method of multiplexing are divided using layering | |
| CA3001292C (en) | Reception apparatus, transmission apparatus, and data processing method | |
| JP2006262530A (en) | Method and system for ofdm multicarrier transmission of digital broadcasting signals | |
| CN107078851A (en) | The broadcast singal frame generation apparatus and broadcast singal frame generating method of multiplexing are divided using layering | |
| CN106464944B (en) | Broadcast singal sending device, broadcasting signal receiving, broadcast singal sending method and broadcast signal received method | |
| CN100583977C (en) | Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service | |
| CN106464431A (en) | Apparatus and method for generating broadcast signal frame using layered division multiplexing | |
| CN107005358A (en) | Use the broadcast singal frame generating apparatus and broadcast singal frame generating method on the border of the physical layer pipe of core layer | |
| CN106233692A (en) | Broadcast singal dispensing device, broadcast receiver, broadcast singal sending method and broadcast signal received method | |
| CN106464833A (en) | Signal multiplexing device and signal multiplexing method using layered division multiplexing | |
| EP2268004A2 (en) | Broadcast receiver and method | |
| CN105765943B (en) | The device for sending broadcast singal, the device for receiving broadcast singal, the method for sending broadcast singal and the method for receiving broadcast singal | |
| CN109218248A (en) | Demultiplexer systems | |
| CN106464978A (en) | Service guide information transmission method, service guide information reception method, service guide information transmission device, and service guide information reception device | |
| CN105794174A (en) | Apparatus and methods for transmitting/receiving a broadcast signal | |
| CN102111370A (en) | Reception apparatus, reception method, program, and reception system | |
| KR20190083667A (en) | Broadcast signal transmitting and receiving apparatus and method | |
| CN107735991A (en) | Apparatus and method for receiving and dispatching broadcast singal | |
| CN109218792A (en) | Deplexing method | |
| CN106134158A (en) | Broadcast singal transmission equipment, broadcasting signal receiving, broadcast signal transmission method and broadcast signal received method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190115 |