Method for optimizing decoding performance of RSFEC decoding algorithm

Abstract

The invention discloses a method for optimizing the decoding performance of an RSFEC decoding algorithm. The method includes the steps that S1, the positions of all lost packets are enumerated out according to the number m of data codes and the number n of redundant codes, a decoding matrix corresponding to each lost packet position is written into a decoding matrix file, and when the system is started, the decoding matrix file is loaded into a cache; S2, each data code and each redundant code correspond to a single bit in a binary number of a (m+n) digit, one or zero in each binary number is used for representing whether a packet is lost or not, so that a pointer array with the length being (2m+n) is obtained, and the pointer arrays correspond to the decoding matrixes in the decoding matrix file respectively; S3, in a packet loss decoding state, the data codes and the redundant codes at the packet loss positions are converted into the binary numbers, and the corresponding decoding matrixes are found out from the decoding matrix file for decoding according to the pointer arrays.

Description

technical field [0001] The invention relates to the field of encoding technology, in particular to a method for optimizing decoding performance of an RSFEC decoding algorithm. Background technique [0002] As we all know, compared with analog programs, digital programs have clearer effects, purer colors, higher transparency, and no impurity interference in the picture, all thanks to the excellent anti-interference ability of digital signals. In digital signals, in order to prevent external signal interference and protect the signal from variation, multiple error correction codes must be set. During the decoding process of digital signals, it is very sensitive to error signals, as long as there is a small bit error every second, it cannot be decoded normally. The reason why the digital satellite signal can be played smoothly is due to the setting of the error correction code in the digital signal. Among the settings of various error correction codes, the forward error corre...

AI Technical Summary

Problems solved by technology

As the number of original data and redundant codes increases, the complexity of the RSFEC coding algorithm increases dramatically in a geometric manner, and the delay caused by high-real-time network transmission also increases.

When applied to real-time streaming media transmission, especially on streaming media servers and mobile phones, the algorithmic complexity of RSFEC decoding will put a certain amount of pressure on the CPU

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