CN1668102B - A method for implementing transport stream multiplexing - Google Patents
A method for implementing transport stream multiplexing Download PDFInfo
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- CN1668102B CN1668102B CN200410028545XA CN200410028545A CN1668102B CN 1668102 B CN1668102 B CN 1668102B CN 200410028545X A CN200410028545X A CN 200410028545XA CN 200410028545 A CN200410028545 A CN 200410028545A CN 1668102 B CN1668102 B CN 1668102B
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Abstract
This invention provides a realization method for a transmission flow multiplex, which sets a system layer parameter used in filtering the input program transmission flow according to the needs of the user to input programs to obtain the system layer parameter describing input programs based on the flow when needing the flow multiplex, and carries out related transmission flow multiplex process to the system parameter describing input programs and the input program transmission flow matched to the system layer parameter filtering said input programs. This invention manages the system layer parameters for inputting programs and filtering the input program transmission flow separately to reduce the coupling and strength the management to the transmission multiplex process.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to the multiplexing implementation method of a kind of defeated stream.
Background technology
Digital Video System is mainly used in carrying out on SDH (synchronous digital hierarchy) network transmission of digitlization broadcast TV program.
Digital Video System mainly is made up of five functional modules such as encoder, decoder, multiplexing equipment, adapter, distributors, and the system business networking schematic diagram of typical of digital video systems as shown in Figure 1.
In Fig. 1, the A/V representative meets analogue audio frequency, the vision signal of ITU-R 601 standards.
After ENC (encoder) carried out A/D (mould/number) conversion, quantification and compressed encoding to the analogue audio frequency that meets ITU-R 601 standards, the vision signal of input, output met H.222.0 the TS of standard (transport stream).
The function that DEC (decoder) finishes is opposite with ENC, and behind the coding of the transport stream that meets standard H.222.0 through decoding, D/A (D/A) conversion, analog signal of DEC to input, output meets the anolog TV signals of ITU-R601 standard.The input transport stream of DEC can contain single programs or multiple programs.
MUX (multiplexing equipment) will carry out multiple connection from the transport stream of a plurality of interfaces or logical channel input, and output meets the H.222.0 transport stream of standard of ITU-T, finishes the multiplexing function of system layer of transport stream.
NA (adapter) finishes transport stream interface such as ASI (Asynchronous Serial Interface)/SPI (synchronous parallel interface), and G.703 bi-directional conversion, the transmit flow data form of telecommunication interface is two-way adaptive to the SDH frame structure to ITU-T, transmission and the reception of realization transmit flow data on the SDH network.
The function that it is a plurality of transport stream that DIS (distributor) finishes a transport stream hard copy promptly realizes a simple division multi-functional.Distributor is to manage.
Solid line among Fig. 1 is the business datum link, and dotted line is the network management data link.
Transport stream is to be fixed as the continuous data sequence that the data transmission of 188 bytes constitutes by length.PID (group character) is a field in the transfer of data pack arrangement, each specific data component has identical PID in the transport stream, the PID of different pieces of information composition is then inequality, the for example PAT (Program Association Table) of PSI (program-related information), PMT (Program Map Table), also have voice data after the compression, video data, independent PCR (program clock reference) information etc., all distinguish by unique PID.
At present, at the PID configuration management of multiplexing equipment unified, clear and definite notion and standard of neither one also.Its general method is: choose the system layer parameter of some programs the transport stream from input, generate corresponding PSI/SI (business information) data according to these parameters again, and it is downloaded to multiplexing equipment send; Filter out the data of these selected programs simultaneously from input the transport stream, finish the again output of system layer after multiplexing.
This method combines current output PSI/SI data closely with actual input program, generally is merely able to the PID in the edit-modify output transport stream, thereby generates the various data of description of MPEG-2 system layer such as PAT, PMT; And to the PID as PID filter importation edit, management function is not strong.
Summary of the invention
The invention provides a kind of implementation method of transmission flow multiplex, the incomplete shortcoming of group character configuring management method when overcoming in the prior art H.222.0 that system layer is multiplexing in the system.
For achieving the above object, the invention provides following technical scheme:
A kind of implementation method of transmission flow multiplex comprises:
A, the needs of input program are provided for the input program transport streams system layer parameter of filtering according to the user;
B, when needs carry out transmission flow multiplex, obtain the system layer parameter of describing the input program according to the input program transport streams;
C, the system layer parameter and the input program transport streams of the described system layer parameter matching that the input program transport streams is filtered that will describe the input program are carried out corresponding transmission flow multiplex processing.
The system layer parameter of among the described step a input program transport streams being filtered comprises: input group character, output group character.
The system layer parameter of among the described step a input program transport streams being filtered comprises: program input channel, input program number, input group character, the basic stream type of input program, output program number, output group character, output programm name, output program provider, descriptor information, program clock reference sign;
The system layer parameter of describing the input program among the described step b comprises: program input channel, input program number, input program code check, inputting programm name, input program provider, input group character, the basic stream type of input program, basic stream bit rate, descriptor information, program clock reference sign.
The basic stream type of described input program comprises: Program Map Table and program clock reference.
Described to of the formal description of the input program transport streams system layer parameter of filtering with service allocation list;
The system layer parameter of described description input program is with the formal description of program information table.
In the described service allocation list:
A program map is made up of at least one group character mapping;
A group character mapping can be quoted at least one program map;
A program map should comprise the group character mapping of the group character mapping of a Program Map Table, a program clock reference;
In the record of the group character mapping of program clock reference the program clock reference sign must be set.
Described step a further comprises:
According to the input program number of appointment in user's configuration order with the program input channel of corresponding list item in the described program information table, input program number, input group character, input program ES type stores in described service allocation list;
The output group character of described service allocation list is set according to the input group character of the list item of storing in the described service allocation list;
The configuration order of output program number is provided with the output program number of described service allocation list according to the user;
According to the corresponding list item in user's configuration order or the described program information table output programm name in the described service allocation list, output program provider, descriptor information are set;
Publicly expose reference identification according to the program in the described service allocation list of group character mapping settings of the ES of described input program stream.
Described step a further comprises:
According to user's configuration order program input channel in the described service allocation list, input program number, input group character, input program ES type, output program number, output group character, output programm name, output program provider, descriptor information, program clock reference sign are set; Or
According to user's configuration order the corresponding list item that writes down in the described service allocation list is made amendment.
Described step b comprises:
When multiplexing equipment need be to transmission flow multiplex, multiplexing equipment carried out the analysis of system layer parameter to the transport stream in each logic input channel, and analysis result is stored in the described program information table;
Only store the last analysis result in the described program information table.
Described step c comprises:
The record of the respective field in the described program information table and the list item of described service allocation list are mated, and judge whether that the match is successful;
If the match is successful, it is multiplexing that described input program transport streams is carried out corresponding system layer;
If coupling is unsuccessful, described input program transport streams is filtered out.
Description by technique scheme can obviously be learnt, the present invention has clearly proposed system layer parameter that the input program transport streams is filtered and these two notions of system layer parameter of describing the input program, system layer parameter by will importing program and the system layer parameter that is used to filter are respectively with the formal description of program information table and service allocation list, to the system layer parameter and the system layer parameter separate management that the input program transport streams is filtered of input program be described, reduce the degree of coupling of the two, strengthened the manageability in the transmission flow multiplex process; Thereby technical scheme provided by the invention is perfect group echo configuring management method of multiplexing time-division of system layer in the system has H.222.0 strengthened the flexibility that system multiplexing is H.222.0 handled.
Description of drawings
Fig. 1 is the system business networking schematic diagram of the typical of digital video systems of prior art;
Fig. 2 is program information table of the present invention and the interrelated schematic diagram of service allocation list.
Embodiment
Core of the present invention is: according to the user needs of input program are provided for importing the system layer parameter that program transport streams is filtered; When needs during, obtain the relevant information of input program according to input program transport streams loaded information to transmission flow multiplex; The relevant information of input program is carried out corresponding transmission flow multiplex with the input program transport streams of the system layer parameter matching that the input program transport streams is filtered to be handled.
Based on core concept of the present invention technical scheme provided by the invention is further described below.
In the realization transmission flow multiplex process of system H.222.0, the viewpoint of slave unit management is understood, and multiplexing equipment should be one and be subjected to multiplexing equipment that the user controls, the program level.The meaning of program level is that the unit that it is handled is a program, rather than basic transport stream, although program is made up of basic transport stream.Such meaning is meant that it is unnecessary with two incoherent basic transport stream, for example from different programs the time base, different video and audio frequency substantially stream be associated together and generate new program; But simultaneously it can somely have that video, audio frequency or other basic flow datas of base carries out suitable permutation and combination when identical, forms effective program configuration and exports.
We can be imagined as one " fence " to multiplexing equipment, perhaps " filter ", to the input program that meets the demands give by, the input program that does not meet the demands is then filtered out, do not exported.The user should realize oneself this filter of configuration by the system layer parameter that relevant multiplexing equipment itself is set, the program output that multiplexing equipment is needed user oneself.Here it should be noted that: have two notions to make a distinction, one is the system layer parameter of current input program, promptly describe the system layer parameter of input program, another is user oneself being used for of being provided with to the system layer parameter of the multiplexing equipment of importing program and filtering itself.
From user's angle, the system layer parameter that user oneself is provided with should be controlled by the user fully, is not subjected to the variable effects such as ON/OFF, input code flow replacing of interruption/recovery, the passage of the input of external environment condition such as code stream.
The system layer parameter of describing the input program closely links to each other with the input program.Therefore, in the transmission flow multiplex process, the system layer parameter difference of the relevant information of current input program and multiplexing equipment itself is come, managing respectively is best management method to multiplexing equipment.
By foregoing description, the present invention at first needs clear and definite two notions: the system layer parameter that the input program transport streams is filtered is the system layer parameter of multiplexing equipment itself and the system layer parameter of describing the input program.
According to the needs that in the real network input program transport streams filtered, the present invention sets the system layer parameter that the input program transport streams is filtered and comprises: program input channel, input program number, input PID (group character), input program ES (basic stream) type, output program number, output PID, output programm name, output program provider, descriptor information, PCR (program clock reference) sign.
Wherein, the program input channel is the input channel at the input program map place of multiplexing equipment, can be SPI/ASI interface or other types interface.The input program number is the unique program number of input program map in input channel of multiplexing equipment.Input PID is the input PID that a PID of the input program map of multiplexing equipment shines upon.Input program ES type is with the type of input PID as the PID mapping of sign.The output program number is the unique program number of input program map in output channel.Output PID is unique output PID of a PID mapping of output program map.The programm name that the output programm name is had in relevant output SDT (SDT Service Description Table) for the output program map.The program provider title that output program provider is had in relevant output SDT table for the output program map.Descriptor information is: the output program map is if be mapped in the descriptor information of carrying in the output code flow about the PID of PMT mapping or PID.PCR is masked as sign PID mapping and whether carries PCR.
According to the needs that in the real network input program transport streams filtered, the present invention sets the system layer parameter of describing the input program and comprises: program input channel, input program number, input program code check, inputting programm name, input program provider, input PID, input program ES type, ES code check, descriptor information, PCR sign.
Wherein, the program input channel is the input channel at multiplexing equipment input program place, can be SPI/ASI interface or other types interface.The input program number is unique program number that multiplexing equipment input program is had in the transport stream in this input channel.Input program code check is the bit rate to resulting this input program of input program process statistics of multiplexing equipment.The programm name that inputting programm name is had in relevant SDT table for the input program.The program provider title that program provider is had in relevant SDT table for the input program.The PID that input PID has for certain class data of importing program.Input program ES type is with the type of input PID as certain data of uniquely identified.The ES code check be multiplexing equipment input program through statistics obtain with the bit rate of input PID as the uniquely identified categorical data.Descriptor information is relevant with the input program or relevant with ES descriptor information.PCR is masked as this PID mapping of sign and whether carries PCR.
Input program ES type in the said system layer parameter generally comprises RESERVED, MPEG1_VIDEO, MPEG2_VIDEO, MPEG1_AUDIO, MPEG2_AUDIO, MPEG2_PRIVATE_SECT, MPEG2_PRIVATE_DATA, MHEG, DSM_CC, ITU-T.222.1, USER_PRIVATE or the like.The present invention also is arranged on PMT (Program Map Table) and PCR (program clock reference) in the input program ES type.
For ease of above-mentioned each system layer parameter is managed, the present invention will be to the formal description to show respectively of input program transport streams system layer parameter of filtering and the system layer parameter of describing the input program, the table that the system layer parameter that setting is filtered the input program transport streams is described is a service allocation list, and service allocation list also can be called the PID mapping table; The table that the system layer parameter of describing the input program is described is a program information table.Service allocation list and program information table are respectively as shown in Table 1 and Table 2.
Table 1 service allocation list
| The program input channel | The input program number | Input PID | Input program ES type | The output program number | Output PID | The output programm name | Output program provider | Descriptor information | The PCR sign |
| 0 | 1 | 0x46 | PMT | 1 | 0x46 | CCTV-1 | SZTV | xxxxxx | 0 |
| 0 | 1 | 0x61 | MPEG2_AUDIO | 1 | 0x61 | xxxxxx | 0 | ||
| 0 | 1 | 0x62 | MPEG2_VIDEO | 1 | 0x62 | xxxxxx | 0 | ||
| 0 | 1 | 0x63 | PCR | 1 | 0x63 | 1 | |||
| 0 | 2 | 0x47 | PMT | 2 | 0x47 | CCTV-2 | SZTV | xxxxxx | 0 |
| 0 | 2 | 0x64 | MPEG2_AUDIO | 2 | 0x64 | xxxxxx | 0 | ||
| 0 | 2 | 0x65 | MPEG2_VIDEO | 2 | 0x65 | xxxxxx | 0 | ||
| 0 | 2 | 0x66 | MPEG2_PRIVA TE_DATA | 2 | 0x66 | xxxxxx | 0 | ||
| 0 | 2 | 0x63 | PCR | 2 | 0x63 | 1 | |||
| 1 | 1 | 0x45 | PMT | 3 | 0x48 | SZTV-1 | SZTV | xxxxxx | 0 |
| 1 | 1 | 0x62 | MPEG2_AUDIO | 3 | 0x67 | xxxxxx | 0 | ||
| 1 | 1 | 0x63 | MPEG2_VIDEO | 3 | 0x68 | xxxxxx | 1 | ||
| 5 | 1 | 0x51 | PMT | 4 | 0x49 | DVS-1 | SZTV | xxxxxx | 0 |
| 5 | 1 | 0x66 | MPEG2_AUDIO | 4 | 0x69 | xxxxxx | 0 | ||
| 5 | 1 | 0x67 | MPEG2_VIDEO | 4 | 0x6A | xxxxxx | 0 | ||
| 5 | 1 | 0x68 | PCR | 4 | 0x6B | 1 | |||
| 5 | 2 | 0x52 | PMT | 5 | 0x49 | DVS-2 | SZTV | xxxxxx | 0 |
| The program input channel | The input program number | Input PID | Input program ES type | The output program number | Output PID | The output programm name | Output program provider | Descriptor information | The PCR sign |
| 5 | 2 | 0x67 | MPEG2_VIDEO | 5 | 0x6A | xxxxxx | 0 | ||
| 5 | 2 | 0x68 | PCR | 5 | 0x6B | 1 | |||
| 5 | 2 | 0x69 | MPEG2_AUDIO | 5 | 0x6C | xxxxxx | 0 |
Table 2 program information table
| The program input channel | The input program number | Input program code check | Inputting programm name | Input program provider | Input PID | Input program ES type | The ES code check | Descriptor information | The CR sign |
| 0 | 1 | xxxxxx | CCTV-1 | CCTV | 0x46 | PMT | xxxxxx | xxxxxx | 0 |
| 0 | 1 | 0x61 | MPEG2_AUDIO | xxxxxx | xxxxxx | 0 | |||
| 0 | 1 | 0x62 | MPEG2_VIDEO | xxxxxx | xxxxxx | 0 | |||
| 0 | 1 | 0x63 | PCR | xxxxxx | 1 | ||||
| 0 | 2 | xxxxxx | CCTV-2 | CCTV | 0x47 | PMT | xxxxxx | xxxxxx | 0 |
| 0 | 2 | 0x64 | MPEG2_AUDIO | xxxxxx | xxxxxx | 0 | |||
| 0 | 2 | 0x65 | MPEG2_VIDEO | xxxxxx | xxxxxx | 0 | |||
| 0 | 2 | 0x66 | MPEG2_PRIVATE_D ATA | xxxxxx | xxxxxx | 0 | |||
| 0 | 2 | 0x63 | PCR | xxxxxx | 1 | ||||
| 1 | 1 | xxxxxx | SZTV-1 | SZTV | 0x45 | PMT | xxxxxx | xxxxxx | 0 |
| 1 | 1 | 0x62 | MPEG2_AUDIO | xxxxxx | xxxxxx | 0 | |||
| 1 | 1 | 0x63 | MPEG2_VIDEO | xxxxxx | xxxxxx | 1 |
The information of the basic stream of each bar record expression in the program information table, and this flows the adduction relationship for each program substantially.
The input PID of the ES stream of each bar record expression in the service allocation list is to the mapping relations of output PID, and this input PID is mapped as the adduction relationship of each program map.
Program information table and service allocation list are keyword with program input channel, input program number, input PID all.
Record in the program information table is dynamic change, record in the program information table is that multiplexing equipment obtains by the transport stream in each logic input channel being carried out code stream analysis, the variation of time and environment may analyze different results, and program information table only keeps the last analysis result that the input program is carried out code stream analysis.The attribute of program information table should be for read-only, and the various variations of environment all may cause the renewal of program information table in the code stream analysis process that starts multiplexing equipment.
Service allocation list should keep relative stablizing.It should not change with the variation of environment, and service allocation list can change because accepting user's business configuration order.Because the mapping relations that service allocation list is preserved the I/O PID of current program are so the present invention can be divided into service allocation list two levels: program map layer and PID mapping layer.A program map is made up of the PID mapping of the several ES of representative I/O relations usually.The regulation of Moving Picture Experts Group-2 is abideed by in ES stream type definition among the present invention, the present invention on the basis of this standard at the type of PMT, PCR self-defined two value: 0x100,0x101.
The ES stream type of input program is as shown in table 3:
Table 3
| The ES stream type | Code value | Explanation |
| RESERVED | 0x00 | ITU-T|ISO/IEC keeps |
| MPEG1_VIDEO | 0x01 | The video data of Moving Picture Experts Group-1 |
| MPEG2_VIDEO | 0x02 | The video data of Moving Picture Experts Group-2 |
| MPEG1_AUDIO | 0x03 | The voice data of Moving Picture Experts Group-1 |
| MPEG2_AUDIO | 0x04 | The voice data of Moving Picture Experts Group-2 |
| MPEG2_PRIVATE_SECT | 0x05 | The privately owned segmentation of Moving Picture Experts Group-2 |
| MPEG2_PRIVATE_DATA | 0x06 | The private data of Moving Picture Experts Group-2 |
| MHEG | 0x07 | The MHEG data |
| DSM_CC | 0x08 | The DSM_CC data |
| ITU-T H.222.1 | 0x09 | Meet the H.222.1 data of standard |
| … | … | … |
| The ES stream type | Code value | Explanation |
| USER_PRIVATE | 0xFF | User's private type data |
| PMT | 0x100 | The PID of PMT |
| PCR | 0x101 | Carry the ES data of PCR specially |
The present invention opens each field in the service allocation list to the user, go to determine multiplexing equipment about the I/O relation of each program map, the I/O relation of each PID mapping by the user, and under the principle of forming effective program, the various permutation and combination of importing basic stream are disposed.
If these two notions that propose with the present invention are analyzed the implementation method of transmission flow multiplex in the prior art, so, we can say that program information table closely links to each other with service allocation list in the prior art.In the prior art, content in input program number in the service allocation list, the parameter such as input PID etc. is the content replication in the field such as the input program number, input PID from program information table, be not open to the user, the user cannot revise voluntarily, have only parameters such as exporting program number, output PID in the service allocation list open, allow the user to dispose voluntarily the user.
The present invention separates program information table with service allocation list design as shown in Figure 2.Can see obviously from Fig. 2 that input program number in the service allocation list, the isoparametric content of input PID promptly can the respective field from program information table be duplicated obtains, and also can be disposed voluntarily by the user.After the input program number in the service allocation list, the isoparametric content of input PID were duplicated from the respective field of program information table from program information table and obtained, this content user can be made amendment equally as required.
The present invention opens all fields of service allocation list on the basis that clearly proposes program information table and service allocation list to the user, be configured by the user.But have certain restriction relation in the service allocation list between each field, the user should satisfy these restriction relations during content in allocation list.Each restriction relation is embodied in:
A. a program map is made up of one or more PID mappings.
B. a PID mapping can be quoted by a plurality of program map.
C. an effective program map must comprise and only comprise the PID mapping of the PID mapping of a PMT, a PCR or the PID mapping that other type is carried the PCR sign, and the PID mapping amount of other type such as audio or video is not limit.
Must carry the PCR sign in the PID map record of d.PCR, PCR sign list item promptly must be set in this record; The PID mapping of PMT generally is not provided with PCR sign list item.
E. many types are PMT the PID mapping can have identical or different output PID.
F. audio frequency PID mapping generally is not provided with the PCR sign.
The invention provides two kinds of concrete configuration methods to service allocation list:
Method one, program level configuration method comprise the steps:
Step 1: according to the program number of user's configuration order appointment, program input channel, input program number, input PID, the input program ESC type field content of corresponding all records of this program number in the program information table are copied in the service allocation list corresponding field, as the importation of service allocation list.Copy when this generally comprises several records.Through the program input channel in the step 1 filling service allocation list, input program number, input PID, input program ES type field.
Step 2: according to output PID exclusivity principle, carry out the generating algorithm of PID at each importation of business configuration list item,, be filled into the output PID field of service allocation list, as the output of service allocation list with the acquiescence output PID that obtains.
Step 3: the output program number in the service allocation list can allow the user dispose appointment.The output program number of every programs should be unique, and its span is 0～65535.If the span of output program number is 0, then this program configuration of expression deletion.
Step 4: the output programm name in the service allocation list, output program provider field are used to construct the SDT table of output program, and general corresponding field from program information table is duplicated, and also can open to the user and dispose and revise.
Step 5: the descriptor information field in the program information table is used to preserve program or each flows relevant data of description substantially, and the descriptor information field in the service allocation list is preserved the data of description that is used to construct output PSI, generally is that the respective field from program information table is duplicated.
Step 6: the PCR sign in the service allocation list refers to whether the PID mapping of this ES stream carries PCR.The PID of PCR both can be PID independently, also can mix use with the PID of business datum; The PID mapping of PCR can be quoted by multiple programs simultaneously.
Method two, PID level configuration method comprise the steps:
PID level configuration is exactly that I/O part in every record in the service allocation list can be filled by customization fully, but requires to constitute the effective PSI/SI information of complete sum.It has realized a kind of to program, flow the customization fully of I/O relation substantially.This configuration mode requires the correct input of user about data such as the logic input channel of every programs, input program number, input PID, PID type, output program number, output PID, constitutes a complete program to dispose, and is filled in the service allocation list.For example the 4th, 5 programs of output just can be that so a kind of complete mode by customization produces and fills in the table 2, must comprise that in filling process some PID generate and collision detection scheduling algorithms.In addition, if the user revises individually the I/O PID mapping of the record that existed in the service allocation list, also can think the configuration that belongs to the PID level.
After having carried out above-mentioned configuration,, from program information table, obtain the system layer parameter of describing the input program when needs during to transmission flow multiplex.
The system layer parameter of the description of obtaining input program and the list item of service allocation list are mated, and judge whether that the match is successful; If the match is successful, will importing program transport streams, to carry out corresponding system layer multiplexing; If coupling is unsuccessful, described input program transport streams is filtered out.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wishes that appended claim comprises these distortion and variation.
Claims (9)
1. the implementation method of a transmission flow multiplex is characterized in that comprising:
A, according to the user needs of input program are provided for the input program transport streams system layer parameter of filtering, the described system layer parameter that the input program transport streams is filtered is with the formal description of service allocation list;
B, when needs carry out transmission flow multiplex, obtain the system layer parameter of describing the input program according to the input program transport streams, the system layer parameter of described description input program is with the formal description of program information table;
C, the system layer parameter and the input program transport streams of the described system layer parameter matching that the input program transport streams is filtered that will describe the input program are carried out corresponding transmission flow multiplex processing.
2. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that the system layer parameter of among the described step a input program transport streams being filtered comprises: input group character, output group character.
3. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that the system layer parameter of among the described step a input program transport streams being filtered comprises: program input channel, input program number, input group character, the basic stream type of input program, output program number, output group character, output programm name, output program provider, descriptor information, program clock reference sign;
The system layer parameter of describing the input program among the described step b comprises: program input channel, input program number, input program code check, inputting programm name, input program provider, input group character, the basic stream type of input program, basic stream bit rate, descriptor information, program clock reference sign.
4. the implementation method of a kind of transmission flow multiplex as claimed in claim 3 is characterized in that the basic stream type of described input program comprises: Program Map Table and program clock reference.
5. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that in the described service allocation list:
A program map is made up of at least one group character mapping;
A group character is mapped as at least one program map and quotes;
A program map should comprise the group character mapping of the group character mapping of a Program Map Table, a program clock reference;
In the record of the group character mapping of program clock reference the program clock reference sign must be set.
6. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that described step a further comprises:
According to the input program number of appointment in user's configuration order program input channel, input program number, input group character, the input program of corresponding list item in the described program information table flowed the ES type stores substantially in described service allocation list;
The output group character of described service allocation list is set according to the input group character of the list item of storing in the described service allocation list;
The configuration order of output program number is provided with the output program number of described service allocation list according to the user;
According to the corresponding list item in user's configuration order or the described program information table output programm name in the described service allocation list, output program provider, descriptor information are set;
Publicly expose reference identification according to the program in the described service allocation list of group character mapping settings of the basic stream of described input program.
7. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that described step a further comprises:
The program input channel, input program number, input group character, the input program that are provided with in the described service allocation list according to user's configuration order flow ES type, output program number, output group character, output programm name, output program provider, descriptor information, program clock reference sign substantially; Or
According to user's configuration order the corresponding list item that writes down in the described service allocation list is made amendment.
8. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that described step b comprises:
When multiplexing equipment need be to transmission flow multiplex, multiplexing equipment carried out the analysis of system layer parameter to the transport stream in each logic input channel, and analysis result is stored in the described program information table;
Only store the last analysis result in the described program information table.
9. the implementation method of a kind of transmission flow multiplex as claimed in claim 1 is characterized in that described step c comprises:
The record of the respective field in the described program information table and the list item of described service allocation list are mated, and judge whether that the match is successful;
If the match is successful, it is multiplexing that described input program transport streams is carried out corresponding system layer;
If coupling is unsuccessful, described input program transport streams is filtered out.
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| CN200410028545XA CN1668102B (en) | 2004-03-10 | 2004-03-10 | A method for implementing transport stream multiplexing |
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| CN200410028545XA CN1668102B (en) | 2004-03-10 | 2004-03-10 | A method for implementing transport stream multiplexing |
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| US6643298B1 (en) * | 1999-11-23 | 2003-11-04 | International Business Machines Corporation | Method and apparatus for MPEG-2 program ID re-mapping for multiplexing several programs into a single transport stream |
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| US6643298B1 (en) * | 1999-11-23 | 2003-11-04 | International Business Machines Corporation | Method and apparatus for MPEG-2 program ID re-mapping for multiplexing several programs into a single transport stream |
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