PSI (program special information) data filter for set-top box demultiplexing system and filtering method of data filter

A demultiplexing and set-top box technology, applied in the field of audio and video encoding and decoding, can solve the problems that the processing module cannot efficiently perform parallel operations on TS packet streams, and the unavoidable sequential reading of sample data takes time and hardware overhead, so as to improve efficiency , the effect of improving the accuracy

Inactive Publication Date: 2014-01-01
SHANGHAI LONGJING TECH
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Problems solved by technology

Therefore, this address mapping method makes subsequent processing modules unable to directly and efficiently perform parallel operations of program-specific information in the TS packet stream and multiple stored sample data, even if an intermediate cache is opened in the subsequent processing modules to achieve The purpose of parallel operation, however, is also unavoidable the time consumption of sequentially reading sample data and the hardware overhead of opening intermediate caches

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  • PSI (program special information) data filter for set-top box demultiplexing system and filtering method of data filter
  • PSI (program special information) data filter for set-top box demultiplexing system and filtering method of data filter
  • PSI (program special information) data filter for set-top box demultiplexing system and filtering method of data filter

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[0066] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0067] The program specific information filter (PSI Data Filter) of the present invention is used to filter various standardized data and private data from the TS (Transport stream, transport stream) packet stream (which mainly includes: program association table, program mapping table , Network Information Table, and Conditional Access Table). The structural framework of the hardware design is as follows Figure 1~2 shown. Its structure mainly has four parts: state machine main controller, including sub-modules PSI_TOP_FSM, MEM_FSM, MEM_FIFO; TS stream input buffer, including sub-modules PSI_DATA_PATH, IN_FIFO; comparison logic processor, including sub-modules CMP_FIFO, PMS_TRANFER / FIFO , CMPARER_AND_FSM; TS stream output buffer, including sub-modules OUT_FIFO, CAB_STORE.

[0068] The state machine main...

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Abstract

The invention relates to a program special information (PSI) data filter for a set-top box demultiplexing system and a filtering method of the data filter. The filter comprises a master controller of a state machine, a TS (Transport Stream) code stream input buffer, a comparison logical processor and a TS code stream output buffer, wherein the master controller of the state machine is used for controlling the conversion of the state machine of the PSI data filter, and the comparison logical processor is used for carrying out comparison and filtering processing on PSI data in a TS grouped data packet and feeding a processing result back to the master controller of the state machine. The invention further relates to a method for realizing PSI data filtering in the set-top box demultiplexing system based on the filter. By adopting the PSI data filter, with the structure, for the set-top box demultiplexing system and the filtering method of the data filter, the efficiency of the reading and calculating of data can be greatly increased, the filtering processing on PSI is completed accurately, and the subsequent processing burden of a central processing unit is lightened greatly, so that the PSI data filter and the filtering method thereof have a wide range of application.

Description

technical field [0001] The invention relates to the field of audio and video encoding and decoding, in particular to the field of data filtering in an audio and video demultiplexing system, specifically a PSI data filter and a filtering method in a set-top box demultiplexing system. Background technique [0002] At present, the MPEG-TS packet stream is widely used in the world as the transmission carrier for broadcast audio and video data and other data synthesis, suitable for transmission and storage. In 2006, my country formulated the Advanced Audio and Video Codec Standard (AVS) with independent intellectual property rights. In practical applications, in order to be compatible with the existing broadcast transmission system, the broadcast audio and video data obtained by the above-mentioned standard is still encapsulated in the MPEG-TS packet stream. In the hardware demultiplexing system, program special information (PSI, Program special program) data needs to be filtere...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/434H04N21/435H04N21/44
Inventor 罗佳明
Owner SHANGHAI LONGJING TECH
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