CN107295366A - One kind broadcast multi-pipeline service data scheduling multiplexing method and system - Google Patents
One kind broadcast multi-pipeline service data scheduling multiplexing method and system Download PDFInfo
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- CN107295366A CN107295366A CN201610207968.0A CN201610207968A CN107295366A CN 107295366 A CN107295366 A CN 107295366A CN 201610207968 A CN201610207968 A CN 201610207968A CN 107295366 A CN107295366 A CN 107295366A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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Abstract
The present invention provides a kind of broadcast multi-pipeline service data scheduling multiplexing method and system.The broadcast multi-pipeline service data scheduling multiplexing method includes：Obtain multi-pipeline business datum parameter and systematic parameter；The data of each business pipeline are received, and are cached to respectively in the caching of each business pipeline；Following steps are performed repeatedly until each business pipeline all obtains data base-band frame number data base-band frame；The multi-pipeline business datum parameter and systematic parameter are obtained, signaling frame load information is formed and is encapsulated into a signaling baseband frame, the signaling baseband frame is included into signaling baseband frame originating point information, signaling frame load information；The signaling baseband frame and obtained all data base-band frames are passed through into time division multiplexing, segmentation is constituted can be realized that multi-pipeline business datum sequentially forms base band frame by dynamic dispatching by the base band frame sequence present invention of a physical frame carrying, and be mapped to a physical frame transmission.
Description
Technical field
The present invention relates to a kind of digital broadcast television system field, more particularly to a kind of broadcast multi-pipeline business datum is adjusted
Spend multiplexing method and system.
Background technology
With the development of multimedia service and terminal form, support demand of the digital television broadcasting system to many QoS business
Increasingly improve.The digital television broadcasting system of a new generation, such as Europe DVB-T2/NGH and U.S.'s ATSC3.0 digital television systems,
Pipeline technology is used, realizes and supports multiplexing and transmission different business data format and different modulating coding in a physical frame
Business datum.
Realize that multi-pipeline transmission needs to ensure multiple pipeline business data flows difference framing of multiplexer scheduling different rates,
And seamless cascade；So as to which the business datum for allowing each logical pipe (PLP) to carry is transferred to broadcast modulation in a certain order
Device is simultaneously sent using after different coded modulations, being mapped in each pipeline respective physical resource.Because each pipeline business datum is
Multidiameter delay is inputted, and speed is different.Therefore, by multiple pipeline business datums using each different data lengths point
Framing processing is not carried out, becomes the key technology for being effectively matched transmission for realizing each pipeline business datum and physical resource.
In consideration of it, how to find a kind of conveniently each pipeline business datum of dispatch deal and be mapped on physical frame
Technical scheme just into those skilled in the art's urgent problem to be solved.
The content of the invention
The shortcoming of prior art, multi-pipeline business datum is broadcasted it is an object of the invention to provide one kind in view of the above
Dispatching multiplex method and system, are difficult to scheduling assembling for solving multiple pipeline business data flows of different rates in the prior art
The problem of into physical frame.
In order to achieve the above objects and other related objects, the present invention provides a kind of broadcast multi-pipeline service data scheduling multiplexing
Method, the broadcast multi-pipeline service data scheduling multiplexing method includes：Step S1, obtains multi-pipeline business datum parameter and is
System parameter, multi-pipeline business datum parameter includes the number of business pipeline, and the coding that each business pipeline data is used is previous
Information bit number sum and encoding block before the pipeline coding carried in the information bit length of code block or a physical frame
Number；Carried in the information bit length or a physical frame of the previous code block of coding used according to each business pipeline data
Information bit number sum and coding block number determine what is carried in the data base-band frame of each business pipeline before pipeline coding
Bits of traffic data number and data base-band frame number；Step S2, receives the data of each business pipeline, and be cached to respectively
In the caching of each business pipeline；Following steps are performed repeatedly until each business pipeline all obtains data base-band frame number number
According to base band frame：The size of data in each business pipeline caching is detected, determines that data cached size is more than the pipeline business number
According to the business pipeline of bit number；The business pipeline for being more than the pipeline bits of traffic data number in data cached size is chosen
One business pipeline, intercepts the data of the business pipeline bits of traffic data number from the business pipeline caching of selection, and
The data intercepted are encapsulated into a data base-band frame, the data base-band frame includes data base-band frame originating point information, institute
The data of acquisition；The data base-band frame originating point information includes serial number information and the institute of the physical frame belonging to the data base-band frame
State the serial number information of pipeline described in data base-band frame；Step S3, obtains the multi-pipeline business datum parameter and systematic parameter, shape
Into signaling frame load information and it is encapsulated into a signaling baseband frame, the signaling baseband frame is included into signaling baseband frame head believes
Breath, signaling frame load information；The signaling baseband frame includes the serial number information of the physical frame belonging to the signaling baseband frame；Step
S4, by the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can be by a physical frame
The base band frame sequence of carrying.The signaling baseband frame after the encoded modulation of information bit carried in data base-band frame with mapping
Data area to a physical frame is transmitted, and the physical frame also includes physical frame header information, the physical frame header information
Include the serial number information of the physical frame.
Alternatively, the business pipeline caching is using FIFO cachings.
Alternatively, the business pipeline for being more than the pipeline bits of traffic data number in data cached size chooses an industry
Business pipeline implement including：Selected in the business pipeline that data cached size is more than the pipeline bits of traffic data number
Select the maximum business pipeline of data cached size.
Alternatively, by the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can
By the carrying of physical frame base band frame sequence implement including：It is posterior according to the first data base-band frame of signaling baseband frame
Sequential Mapping is to the data area of the physical frame；The data base-band frame is reflected by the sequencing of institute's metal conduit sequence number and generation
It is mapped to the data area of the physical frame.
Alternatively, the physical frame also includes filling data and/or verification data.
Alternatively, the data base-band frame also includes filling data and/or verification data.
Alternatively, the signaling baseband frame also includes filling data and/or verification data.
Alternatively, the verification data includes CRC check data.
The present invention provides a kind of broadcast multi-pipeline service data scheduling multiplex system, and the broadcast multi-pipeline business datum is adjusted
Degree multiplexing method system includes：Business pipe parameter acquisition module, for obtaining multi-pipeline business datum parameter and systematic parameter,
Multi-pipeline business datum parameter includes the number of business pipeline, the letter for the previous code block of coding that each business pipeline data is used
Information bit number sum and coding block number before the pipeline coding carried in breath bit length or a physical frame；According to each
The pipeline carried in the information bit length or a physical frame of the previous code block of coding that individual business pipeline data is used is compiled
Information bit number sum and coding block number determine the business datum carried in the data base-band frame of each business pipeline before code
Bit number and data base-band frame number；Business datum buffer process module, the data for receiving each business pipeline, and
In the caching for being cached to each business pipeline respectively；Following steps are performed repeatedly until each business pipeline all obtains data base-band
Frame number data base-band frame：The size of data in each business pipeline caching is detected, determines that data cached size is more than described
The business pipeline of pipeline bits of traffic data number；It is more than the industry of the pipeline bits of traffic data number in data cached size
Business pipeline chooses a business pipeline, and the business pipeline bits of traffic data number is intercepted from the business pipeline caching of selection
Data, and the data intercepted are encapsulated into a data base-band frame, the data base-band frame includes data base-band frame
Header, acquired data；The data base-band frame originating point information includes the sequence number of the physical frame belonging to the data base-band frame
The serial number information of pipeline described in information and the data base-band frame；Signaling frame generation module, for obtaining the multi-pipeline industry
Data parameters of being engaged in and systematic parameter, form signaling frame load information and are encapsulated into a signaling baseband frame, by the signaling base
Band frame includes signaling baseband frame originating point information, signaling frame load information；The signaling baseband frame is included belonging to the signaling baseband frame
Physical frame serial number information；Base band frame Multiplexing module, for by the signaling baseband frame and obtained all data base-band frames
By time division multiplexing, segmentation constitutes the base band frame sequence that can be carried by a physical frame.
Alternatively, the business pipeline caching is using FIFO cachings.
Alternatively, the business pipeline for being more than the pipeline bits of traffic data number in data cached size chooses an industry
Business pipeline implement including：Selected in the business pipeline that data cached size is more than the pipeline bits of traffic data number
Select the maximum business pipeline of data cached size.
Alternatively, by the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can
By the carrying of physical frame base band frame sequence implement including：It is posterior according to the first data base-band frame of signaling baseband frame
Sequential Mapping is to the data area of the physical frame；The data base-band frame is reflected by the sequencing of institute's metal conduit sequence number and generation
It is mapped to the data area of the physical frame.
Alternatively, the data base-band frame also includes filling data and/or verification data.
Alternatively, the signaling baseband frame also includes filling data and/or verification data.
Alternatively, the verification data includes CRC check data.
As described above, a kind of broadcast multi-pipeline service data scheduling multiplexing method and system of the present invention, have with following
Beneficial effect：The multi-pipeline business number that (modulation system, encoder bit rate and code length) is required with different rates and different QoS can be realized
According to by dynamic dispatching, sequentially forming base band frame, and be mapped to a physical frame transmission.
Brief description of the drawings
Fig. 1 is shown as the flow signal of an embodiment of the broadcast multi-pipeline service data scheduling multiplexing method of the present invention
Figure.
Fig. 2 is shown as the module signal of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
Figure.
Fig. 3 is shown as the principle signal of another embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
Figure.
Fig. 4 is shown as the data base-band frame of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
Form schematic diagram.
Fig. 5 is shown as the signaling baseband frame of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
Form schematic diagram.
Fig. 6 is shown as the base band frame multiplexing of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
Schematic diagram.
Fig. 7 is shown as the pipeline 1 of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
The simulation result schematic diagram of FIFO read-write pointer changes.
Fig. 8 is shown as the pipeline 2 of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
The simulation result schematic diagram of FIFO read-write pointer changes.
Fig. 9 is shown as 2 pipelines of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
FIFO reads time stimulatiom result schematic diagram.
Figure 10 is shown as the one of the generation of an embodiment of the broadcast multi-pipeline service data scheduling multiplex system of the present invention
The signaling baseband frame and data base-band frame format simulation result schematic diagram carried in individual physical frame.
Component label instructions
1 broadcast multi-pipeline service data scheduling
Multiplex system
11 business pipe parameter acquisition modules
12 business datum buffer process modules
13 signaling frame generation modules
14 base band frame Multiplexing modules
S1~S4 steps
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
It should be noted that the diagram provided in the present embodiment only illustrates the basic conception of the present invention in a schematic way,
Then only display is painted with relevant component in the present invention rather than according to component count, shape and the size during actual implementation in schema
System, it is actual when implementing, and kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel also may be used
Can be increasingly complex.
The present invention provides a kind of broadcast multi-pipeline service data scheduling multiplexing method.In one embodiment, such as Fig. 1 institutes
Show, the broadcast multi-pipeline service data scheduling multiplexing method includes：
Step S1, obtains multi-pipeline business datum parameter and systematic parameter, and multi-pipeline business datum parameter includes business pipe
Carried in the number in road, the information bit length or a physical frame of the previous code block of coding that each business pipeline data is used
Pipeline coding before information bit number sum and coding block number；It is previous according to the coding that each business pipeline data is used
Information bit number sum and coding before the pipeline coding carried in the information bit length of individual code block or a physical frame
Block number determines the bits of traffic data number and data base-band frame number carried in the data base-band frame of each business pipeline.
In one embodiment, the bits of traffic data number carried in the data base-band frame of each business pipeline is equal to each business pipeline
Information ratio before the pipeline coding carried in the information bit length or a physical frame of the previous code block of coding that data are used
Special number sum；The data base-band frame number carried in the data base-band frame of each business pipeline is equal to each business pipeline data
The coding block number of use.
Step S2, receives the data of each business pipeline, and is cached to respectively in the caching of each business pipeline；Hold repeatedly
Row following steps all obtain data base-band frame number data base-band frame until each business pipeline：Detect that each business pipeline delays
Size of data in depositing, determines that data cached size is more than the business pipeline of the pipeline bits of traffic data number；In caching
The business pipeline that size of data is more than the pipeline bits of traffic data number chooses a business pipeline, from the business pipe of selection
The data of the business pipeline bits of traffic data number are intercepted in road caching, and the data intercepted are encapsulated into a data
In base band frame, the data base-band frame includes data base-band frame originating point information, acquired data；The data base-band frame head letter
Breath includes the sequence number letter of pipeline described in the serial number information and the data base-band frame of the physical frame belonging to the data base-band frame
Breath.Invalid number will be deleted or be designated to the data intercepted from the business pipeline caching of selection in business pipeline caching
According to.In one embodiment, the business pipeline caching is using FIFO cachings (abbreviation FIFO).FIFO is English First In
First Out abbreviation, is a kind of data buffer of first in first out.When being operated to FIFO, the data of reading will not be carried out
Delete, but because read-write operation is all that circulation is carried out, i.e., the data cover that legacy data can newly be write, therefore data in FIFO
Otherwise read must can cause data to be lost because of covering in time.In one embodiment, it is more than in data cached size described
The business pipeline of pipeline bits of traffic data number choose business pipeline implement including：It is big in data cached size
The business pipeline for selecting data cached size maximum in the business pipeline of the pipeline bits of traffic data number.In a reality
Apply in example, when information bit number sum is not equal to the previous code block of coding before the pipeline coding carried in a physical frame
During information bit length integer times, information before bits of traffic data number need to be encoded by the pipeline carried in a physical frame
Bit number sum and coding block number are together decided on.The data base-band frame also includes filling data and/or verification data.It is described
Verification data includes CRC check data.The data flow of the business pipeline flows including TS (Transport Stream).Base band frame
(also referred to as BB frames) is a data packing block, after TS streams enter multiplexer, with fixed bit size (DFL, i.e. Data
Field Length data field lengths) on the basis of TS packets are cut.By this DFL according to agreement, base band frame frame is added
Head BB Header fields, postamble is filled Padding.So BB Header+DFL+Padding=BB Frame.This is just
It is to form a complete BB frame.BB is the base unit of TS data packing, before being formed after being encoded again by BCH, LDPC afterwards
To error correcting code FEC data blocks.The size of the data base-band frame is the integer for the size of data that the elementary cell number is carried
Times.CRC is CRC (Cyclic Redundancy Check)：It is the most frequently used one kind in data communication field
Error check code, it is characterized in that the length of information field and check field can be with arbitrarily selected.
Step S3, obtains the multi-pipeline business datum parameter and systematic parameter, forms signaling frame load information and encapsulates
Into a signaling baseband frame, the signaling baseband frame is included into signaling baseband frame originating point information, signaling frame load information；The letter
Base band frame is made to include the serial number information of the physical frame belonging to the signaling baseband frame.In one embodiment, the signaling baseband
Frame also includes filling data and/or verification data.The verification data includes CRC check data.In one embodiment, it is described
Systematic parameter includes the elementary cell number that can be carried in sampling period, the length of a data symbol, a data symbol,
All symbols of non-data business are carried in the maximum number for the data symbol that one physical frame can be carried, a physical frame
Total length.Speed of the business datum parameter including transmission services data of each pipeline, order of modulation, encoder bit rate, coding code
It is long etc..
Step S4, by the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can
By the base band frame sequence of a physical frame carrying.The signaling baseband frame passes through with the information bit carried in data base-band frame to be compiled
The data area that a physical frame is mapped to after code modulation is transmitted, and the physical frame also includes physical frame header information, described
Physical frame header information includes the serial number information of the physical frame.In one embodiment, by the signaling baseband frame and obtain
All data base-band frames are by time division multiplexing, and segmentation, which is constituted, to implement bag by the base band frame sequence of a physical frame carrying
Include：According to the first posterior Sequential Mapping of data base-band frame of signaling baseband frame to the data area of the physical frame；The data
Base band frame is mapped to the data area of the physical frame by the sequencing of institute's metal conduit sequence number and generation.
In one embodiment, the broadcast multi-pipeline service data scheduling multiplexing method includes：
1, N roads pipeline data stream (such as TS streams) data to input carry out FIFO bufferings (abbreviation FIFO) processing respectively；No
Same pipeline, which has respectively, a FIFO.
2, the information bit length of the previous code block of coding used according to each pipeline business datumDetermine each pipeline
Data base-band frame in the bits of traffic data number that carriesWherein,NPLPFor scheduling
The incoming traffic pipe number that multiplex system is supported；
3, according to the coding of each pipeline carried in the physical frame of the base band frame of the carrying dispatching multiplex system of acquisition output
Block number meshDetermine the data base-band number of frames of each pipeline in a physical frameI.e.
4, according to the bits of traffic data number carried in the data base-band frame of each pipelineAnd in each pipeline FIFO
Data volume state, select certain road pipeline FIFO, therefrom readBit data carries out data base-band frame framing operation.Specifically
Including：
A) data volume in each pipeline FIFO is detected
B) select allFIFO, list all possible FIFO sequence numbers collection Ω, Ω ∈ 1 ..., NPLP；
C) its data fifo amount maximum FIFO, its FIFO serial number i'(i' ∈ Ω in selection FIFO sequence number collection Ω), its
Data volume is
D) read from the i-th ' individual FIFOBit data, carries out data base-band frame framing operation；
E) willAfter bit data interpolation data base band frame head, filling bit, check bit, a data base-band is generated
Frame.Wherein in data base-band frame head comprise at least recognize the data base-band frame institute metal conduit sequence number i (i=1 ..., NPLP) letter
Cease PLP_ID and the serial number information Frm_ID of the affiliated physical frame of data base-band frame；
F) repeat a) to e) step.
5, business datum parameter and systematic parameter based on acquisition form signaling frame load information, and carry out signaling baseband
Frame framing operation；
6, signaling frame load information is added after signaling baseband frame head, filling bit, check bit, a signaling base is generated
Band frame.The serial number information Frm_ID of the affiliated physical frame of signaling baseband frame is comprised at least wherein in signaling baseband frame head；
7, by 1 signaling baseband frame andIndividual data base-band frame is according to the first data base-band of signaling baseband frame
Exported after the posterior order time division multiplexing of frame.
The broadcast multi-pipeline service data scheduling multiplexing method of the present invention is by known multi-pipeline business datum parameter, such as
Number of tubes, speed, the information bit length of the previous code block of forward error correction coding of each pipeline business datum etc., from parallel
In the multiple-way duct business datum of input, dynamic dispatching successively selects suitable pipeline business datum, and previous according to its coding
The information bit length of individual code block carries out data base-band framing processing；According to the signaling parameter for obtaining and calculating, signaling base is carried out
Band framing processing；Each signaling baseband frame is multiplexed with several data base-band frames, is mapped to a physical frame transmission；Each base band
Signaling or data bit in frame pass through a physical layer coded treatment；The present invention can realize there is different rates and different QoS
It is required that the multi-pipeline business datum of (modulation system, encoder bit rate and code length), by dynamic dispatching, sequentially forms base band frame, and
It is mapped to a physical frame transmission.The main object of the present invention is to be directed to multiplex system, by multiple pipes of the different rates of input
The inlet flow in road, according to its different coded information bits length, selects and forms data base-band frame, and with the signaling frame of formation
After multiplexing, to export to follow-up modulator, then the physical frame generated after encoded modulation by the latter is transmitted.The multiplexing of the present invention
The information of the carrying of the signaling baseband frame and some data base-band frames of system generation can be transmitted by a physical frame carrying.
The present invention provides a kind of broadcast multi-pipeline service data scheduling multiplex system.The broadcast multi-pipeline business datum is adjusted
Spending multiplexing method can be using broadcast multi-pipeline service data scheduling multiplexing method as described above.In one embodiment, such as
Shown in Fig. 2, the broadcast multi-pipeline service data scheduling multiplex system 1 includes business pipe parameter acquisition module 11, business number
According to buffer process module 12, signaling frame generation module 13 and base band frame Multiplexing module 14.Wherein：
Business pipe parameter acquisition module 11 is used to obtain multi-pipeline business datum parameter and systematic parameter, multi-pipeline business
Data parameters include the number of business pipeline, the information bit length for the previous code block of coding that each business pipeline data is used
Or information bit number is total before the pipeline coding carried in a physical frame and encodes block number；According to each business pipeline
Information ratio before the pipeline coding carried in the information bit length or a physical frame of the previous code block of coding that data are used
Special number sum and coding block number determine the bits of traffic data number that is carried in the data base-band frame of each business pipeline with
And data base-band frame number.In one embodiment, the bits of traffic data carried in the data base-band frame of each business pipeline
Number is equal to the information bit length for the previous code block of coding that each business pipeline data is used；The data of each business pipeline
The data base-band frame number carried in base band frame is equal to the coding block number that each business pipeline data is used.
Business datum buffer process module 12 is connected with business pipe parameter acquisition module 11, for receiving each business pipe
The data in road, and be cached to respectively in the caching of each business pipeline；Repeatedly perform following steps until each business pipeline all
Obtain data base-band frame number data base-band frame：The size of data in each business pipeline caching is detected, is determined data cached
Size is more than the business pipeline of the pipeline bits of traffic data number；It is more than the pipeline business datum in data cached size
The business pipeline of bit number chooses a business pipeline, and the business pipeline business is intercepted from the business pipeline caching of selection
The data of data bit number, and the data intercepted are encapsulated into a data base-band frame, wrapped in the data base-band frame
Include data base-band frame originating point information, acquired data；The data base-band frame originating point information is included belonging to the data base-band frame
The serial number information of pipeline described in the serial number information of physical frame and the data base-band frame.In one embodiment, the business
Pipeline caching is using FIFO cachings.When being operated to FIFO, the data of reading will not be deleted, read-write operation be all circulate into
It is capable, i.e., the data cover that legacy data can newly be write, therefore digital independent must be timely in FIFO, otherwise can cause data because
Cover and lose.In one embodiment, the business pipe of the pipeline bits of traffic data number is more than in data cached size
Road choose business pipeline implement including：It is more than the pipeline bits of traffic data number in data cached size
The business pipeline for selecting data cached size maximum in business pipeline.The data base-band frame also includes filling data and/or school
Test data.The verification data includes CRC check data.The data flow of the business pipeline includes TS (Transport
Stream) flow.Data base-band frame (also referred to as DBB frames) is a data packing block, after TS streams enter multiplexer, with fixed ratio
TS packets are cut on the basis of especially big small (DFL, i.e. Data Field Length data field lengths).By this DFL according to
Agreement, interpolation data base band frame frame head DBB Header fields, postamble is filled Padding.So DBB Header+DFL+
Padding=DBB Frame.Here it is forming a complete DBB frame.DBB is the base unit of TS data packing, Zhi Houzai
Forward error correction FEC data blocks are formed after being encoded by BCH, LDPC.The step of above-mentioned execution repeatedly, can be continuously performed,
Can be performed according to clock signal (or instruction) triggering.CRC is CRC (Cyclic Redundancy
Check)：It is the most frequently used a kind of error check code in data communication field, it is characterized in that the length of information field and check field
Degree can be with arbitrarily selected.
Signaling frame generation module 13 is connected with business pipe parameter acquisition module 11, for obtaining the multi-pipeline business number
According to parameter and systematic parameter, form signaling frame load information and be encapsulated into a signaling baseband frame, by the signaling baseband frame
Including signaling baseband frame originating point information, signaling frame load information；The signaling baseband frame includes the thing belonging to the signaling baseband frame
Manage the serial number information of frame.In one embodiment, the signaling baseband frame also includes filling data and/or verification data.It is described
Verification data includes CRC check data.In one embodiment, the systematic parameter includes sampling period, a data symbol
Length, the elementary cell number that can be carried in a data symbol, the data symbol that a physical frame can be carried
The total length of all symbols of non-data business is carried in maximum number, a physical frame.The business datum parameter bag of each pipeline
Include speed, order of modulation, encoder bit rate, coding code length of transmission services data etc..
Base band frame Multiplexing module 14 is connected with business datum buffer process module 12 and signaling frame generation module 13, is used for
By the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can be carried by a physical frame
Base band frame sequence.The signaling baseband frame after the encoded modulation of information bit carried in data base-band frame with being mapped to one
The data area of individual physical frame is transmitted, and the physical frame also includes physical frame header information, and the physical frame header information includes
The serial number information of the physical frame.In one embodiment, the signaling baseband frame and obtained all data base-band frames are led to
Cross time division multiplexing, segmentation constitute can by the base band frame sequence of a physical frame carrying implement including：According to signaling baseband
The first posterior Sequential Mapping of data base-band frame of frame is to the data area of the physical frame；The data base-band frame presses institute's metal conduit
Sequence number and the sequencing of generation are mapped to the data area of the physical frame.
In one embodiment, it is described broadcast multi-pipeline service data scheduling multiplex system principle as shown in figure 3, its
In：
Pipeline FIF0 devices carry out buffered respectively to N roads pipeline data stream (such as TS streams) data of input.
Business datum parameter and systematic parameter of the business pipe parameter acquisition device based on acquisition, form signaling frame payload letter
Breath；The information bit length of the previous code block of coding used according to each pipeline business datum, determines the data base-band of each pipeline
The bits of traffic data number carried in frameNPLPTo need the business pipe number transmitted；According to one
The coding number of blocks of each pipeline carried in individual physical frame determines the data base-band number of frames N of each pipeline in a physical frameDFFB。
Digital independent control device calculates the data base-band frame of each pipeline obtained according to business pipe parameter acquisition device
Data volume state in the bits of traffic data number of middle carrying, and each pipeline FIFO, selection reads data volume and exceedes data
One piece of data in the FIFO of bits of traffic data number and the data volume maximum carried in base band frame carries out the follow-up pipe number
According to framing processing；The bit length of the one piece of data is the business number that carries in the data base-band frame of the corresponding pipelines of the FIFO
According to bit number.
The one piece of data read from FIFO is encapsulated as data base-band frame by data framing device, and each data base-band frame leads to
Cross a physical layer data coding code block transmission.Data base-band frame format is as shown in Figure 4.One data base-band frame lattice includes data
Base band frame head, filling bit, CRC check bit, wherein data base-band frame payload bit, data base-band frame head include the identification number
According to base band frame institute metal conduit sequence number i (i=1 ..., NPLP) information PLP_ID and the affiliated physical frame of data base-band frame sequence
Number information Frm_ID.
Signaling frame load information is encapsulated as signaling baseband frame by signaling framing apparatus, and each signaling baseband frame passes through a thing
Manage the transmission of layer signalling coding code block.The form of signaling baseband frame is as shown in Figure 5.One signaling baseband frame includes signaling baseband frame
Head, filling bit, CRC check bit, signaling baseband frame payload information bit.The letter is comprised at least wherein in signaling baseband frame head
Make the serial number information Frm_ID of the affiliated physical frame of base band frame.
Signaling baseband frame and data base-band frame are cascaded and are multiplexed by base band frame multiplexer with ratio in certain sequence, and general one
Individual physical frame carries a signaling baseband frame and several data base-band frames, and signaling baseband frame is passed prior to data base-band frame
Defeated, the total quantity of data base-band frame is equal to the data base-band frame number sum of all pipelines carried in a physical frame.That is base
It is used for the data area for assembling physical frame with frame multiplexer, in one embodiment, in the data area of the physical frame
Base band frame multiplex data is as shown in Figure 6.In the base band frame carried in physical frame, including the 1 signaling baseband frame transmitted first andIndividual data base-band frame.The order that wherein all data base-band frames for being subordinate to different pipelines are dispatched according to FIFO is successively
Time division multiplexing cascade, and the information bit length for encoding previous code block that each data base-band frame is used according to its metal conduit
Its length is variable.
In one embodiment, under the conditions of given system Parameter, the solution of the present invention is used to be dispatched with 2 PLP
It is multiplexed effect.Assuming that needing the data rate and systematic parameter of transmission as follows：1, input channel number NPLP=2；2, two-way pipeline is defeated
It is burst TS bags to enter data, and each burst packets size is 188Byte, and streaming rate is respectively RTS1=2.1Mbps, RTS2=
22.2Mbps；3, the pipe carried in the information bit length or a physical frame of the previous code block of coding that two-way pipeline is used
Information bit number sum before road codingBit, i=1,2；4, calculate and select according to above-mentioned business datum parameter
One group of data dispatch multiplexing parameters：1) the data base-band frame number that pipeline 1 is carried2) data base-band that pipeline 2 is carried
Frame number3) the data base-band frame number sum of all pipelines in a physical frame is determined
5, set other simulation parameters, such as bit of FIFO bit wides 8, FIFO depth LFIFOFor 1478 bytes, FIFO read-writes speed is
80MHz etc..
By analysis of simulation result, in simulation result as shown in Figures 7 and 8, abscissa represent FIFO after when
Between change, represented with clock number, ordinate represent pointer read data.I-th of FIFO write pointer change is represented with Pwri,
Prdi represents i-th of FIFO read pointer change, because FIFO data structure is circular linked list, is represented with Pdiffi i-th
Difference between FIFO write pointer value and read pointer value is to the result of FIFO depth modulus, i.e.,It may be seen that two FIFO write pointer values are with the arrival of each burst packet, rank
Ladder type circulation increase, and because the traffic data rate of pipeline 2 is higher than pipeline 1, therefore the former FIFO write pointer value units
Gathering way higher than the latter in the clock cycle, and with the ratio positive correlation of both traffic data rates；In addition, two pipelines
FIFO read and write pointer value in FIFO depth LFIFOThe circulation of (i.e. 1478) interior numerical value is incremented by, and does not occur to overflow up and down, Pdiff with
The increase of write pointer value and increase, reduce with the increase of read pointer value, and can keep regular fluctuation within the specific limits,
The pipeline business datum for being indicated above writing each FIFO by scheduling controlling (does not occur to lead due to writing covering by timely reading
The incoming traffic loss of data of cause) to form data base-band frame.Because each clock CLK is detected in each pipeline FIFO
Data volumeWhen Pdiff be continuously increased untilAfterwards, digital independent control device can select industry
The maximum FIFO of data volume of being engaged in,And read from the i-th ' individual FIFOBit
Data, carry out data base-band frame framing operation；The FIFO read states of visible 2 pipelines of simulation result as shown in Figure 9 exist in addition
Sequential in one clock cycle, when EnRd is 1 or 2, expression performs FIFO2 or FIFO1 respectively within the corresponding clock cycle
Read operation.In preceding 58 read operations to FIFO, have be for 5 times the FIFO to pipeline 1 read operation, 53 times are to pipe
The FIFO in road 2 read operation.And the FIFO read operation sequence numbers to pipeline 1 are respectively 11,22,34,45,57, and remaining is right
The FIFO read operation sequence numbers of pipeline 2；Finally, according to above-mentioned FIFO read operations sequence number, generate one it is as shown in Figure 10
The signaling baseband frame (SBBF) and data base-band frame (DBBF) form carried in physical frame.
In summary, a kind of broadcast multi-pipeline service data scheduling multiplexing method of the invention can be realized with not with system
Same rate and different QoS require the multi-pipeline business datum of (modulation system, encoder bit rate and code length), by dynamic dispatching, according to
Secondary formation base band frame, and it is mapped to a physical frame transmission.So, the present invention effectively overcomes various shortcoming of the prior art
And have high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (14)
1. one kind broadcast multi-pipeline service data scheduling multiplexing method, it is characterised in that the broadcast multi-pipeline business datum is adjusted
Degree multiplexing method includes：
Step S1, obtains multi-pipeline business datum parameter and systematic parameter, and multi-pipeline business datum parameter includes business pipeline
What is carried in number, the information bit length or a physical frame of the previous code block of coding that each business pipeline data is used should
Information bit number sum and coding block number before pipeline coding；Information ratio before the coding used according to each business pipeline data
Bit length and coding block number determine bits of traffic data number and the number carried in the data base-band frame of each business pipeline
According to base band frame number；
Step S2, receives the data of each business pipeline, and is cached to respectively in the caching of each business pipeline；Perform repeatedly with
Lower step all obtains data base-band frame number data base-band frame until each business pipeline：
The size of data in each business pipeline caching is detected, determines that data cached size is more than the pipeline bits of traffic data
The business pipeline of number；
The business pipeline for being more than the pipeline bits of traffic data number in data cached size chooses a business pipeline, from choosing
The data of the business pipeline bits of traffic data number are intercepted in the business pipeline caching taken, and the data intercepted are encapsulated
Into a data base-band frame, the data base-band frame includes data base-band frame originating point information, acquired data；The data
Base band frame originating point information includes managing described in the serial number information and the data base-band frame of the physical frame belonging to the data base-band frame
The serial number information in road；
Step S3, obtains the multi-pipeline business datum parameter and systematic parameter, forms signaling frame load information and is encapsulated into one
In individual signaling baseband frame, the signaling baseband frame is included into signaling baseband frame originating point information, signaling frame load information；The signaling base
Include the serial number information of the physical frame belonging to the signaling baseband frame with frame；
Step S4, by the signaling baseband frame and obtained all data base-band frames by time division multiplexing, segmentation composition can be by one
The base band frame sequence of individual physical frame carrying.
2. broadcast multi-pipeline service data scheduling multiplexing method according to claim 1, it is characterised in that：The business pipe
Road caching is using FIFO cachings.
3. broadcast multi-pipeline service data scheduling multiplexing method according to claim 1, it is characterised in that：Data cached
Size be more than the pipeline bits of traffic data number business pipeline choose business pipeline implement including：Slow
Deposit data size, which is more than in the business pipeline of the pipeline bits of traffic data number, selects the maximum business of data cached size
Pipeline.
4. broadcast multi-pipeline service data scheduling multiplexing method according to claim 1, it is characterised in that：By the signaling
The base band frame sequence that base band frame and obtained all data base-band frames can be carried by time division multiplexing, segmentation composition by a physical frame
Row implement including：The data of the physical frame are encapsulated into according to the first posterior order of data base-band frame of signaling baseband frame
Region；The data base-band frame is encapsulated into the data area of the physical frame by the sequencing of generation.
5. broadcast multi-pipeline service data scheduling multiplexing method according to claim 1, it is characterised in that：The data base
Band frame also includes filling data and/or verification data.
6. broadcast multi-pipeline service data scheduling multiplexing method according to claim 1, it is characterised in that：The signaling base
Band frame also includes filling data and/or verification data.
7. the broadcast multi-pipeline service data scheduling multiplexing method according to any claim in claim 5 to 6, it is special
Levy and be：The verification data includes CRC check data.
8. one kind broadcast multi-pipeline service data scheduling multiplex system, it is characterised in that：The broadcast multi-pipeline business datum is adjusted
Degree multiplexing method system includes：
Business pipe parameter acquisition module, for obtaining multi-pipeline business datum parameter and systematic parameter, multi-pipeline business datum
Parameter includes the number of business pipeline, the information bit length or one for the previous code block of coding that each business pipeline data is used
Information bit number sum and coding block number before the pipeline coding carried in individual physical frame；According to each business pipeline data
Information bit before the pipeline coding carried in the information bit length or a physical frame of the previous code block of coding of use
Mesh sum and coding block number determine bits of traffic data number and the number carried in the data base-band frame of each business pipeline
According to base band frame number；
Business datum buffer process module, the data for receiving each business pipeline, and each business pipeline is cached to respectively
Caching in；Following steps are performed repeatedly until each business pipeline all obtains data base-band frame number data base-band frame：Inspection
The size of data surveyed in each business pipeline caching, determines that data cached size is more than the pipeline bits of traffic data number
Business pipeline；The business pipeline for being more than the pipeline bits of traffic data number in data cached size chooses a business pipe
Road, intercept the data of the business pipeline bits of traffic data number from the business pipeline of selection caching, and will be intercepted
Data are encapsulated into a data base-band frame, and the data base-band frame includes data base-band frame originating point information, acquired data；
The data base-band frame originating point information includes the serial number information and the data base-band of the physical frame belonging to the data base-band frame
The serial number information of pipeline described in frame；
Signaling frame generation module, for obtaining the multi-pipeline business datum parameter and systematic parameter, forms signaling frame payload letter
Cease and be encapsulated into a signaling baseband frame, the signaling baseband frame is included into signaling baseband frame originating point information, signaling frame payload letter
Breath；The signaling baseband frame includes the serial number information of the physical frame belonging to the signaling baseband frame；
Base band frame Multiplexing module, for the signaling baseband frame and obtained all data base-band frames, by time division multiplexing, to be divided
Section constitutes the base band frame sequence that can be carried by a physical frame.
9. broadcast multi-pipeline service data scheduling multiplex system according to claim 8, it is characterised in that：The business pipe
Road caching is using FIFO cachings.
10. broadcast multi-pipeline service data scheduling multiplex system according to claim 8, it is characterised in that：In caching number
The business pipeline for being more than the pipeline bits of traffic data number according to size choose business pipeline implement including：
Data cached size, which is more than in the business pipeline of the pipeline bits of traffic data number, selects the maximum industry of data cached size
Business pipeline.
11. broadcast multi-pipeline service data scheduling multiplex system according to claim 8, it is characterised in that：By the letter
The base band frame for making all data base-band frames of the base band frame with obtaining to be carried by time division multiplexing, segmentation composition by a physical frame
Sequence implement including：According to the number of the first posterior Sequential Mapping of data base-band frame of signaling baseband frame to the physical frame
According to region；The data base-band frame is mapped to the data field of the physical frame by the sequencing of institute's metal conduit sequence number and generation
Domain.
12. broadcast multi-pipeline service data scheduling multiplex system according to claim 8, it is characterised in that：The data
Base band frame also includes filling data and/or verification data.
13. broadcast multi-pipeline service data scheduling multiplex system according to claim 8, it is characterised in that：The signaling
Base band frame also includes filling data and/or verification data.
14. the broadcast multi-pipeline service data scheduling multiplex system according to any claim in claim 12 to 13,
It is characterized in that：The verification data includes CRC check data.
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