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

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...

AI Technical Summary

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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