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Method for optimizing network data transmission redundancy error correction rate

A technology for network data transmission and redundancy error correction rate, which is applied in the field of communication and can solve the problems of redundancy, unable to adapt to line stability, etc.

Inactive Publication Date: 2007-11-14
SHENZHEN TEMOBI SCI &TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a transmission method for dynamically adjusting the redundant error correction rate in view of the problem that the fixed redundancy in the prior art cannot be adaptively adjusted according to the stability of the line

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  • Method for optimizing network data transmission redundancy error correction rate

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[0030] 1. Combining the FEC algorithm and decoding error concealment technology in video transmission is to dynamically adjust the redundancy according to the importance of video information coding frames in transmission.

[0031] Firstly, the encoding information to be transmitted is analyzed, and through the analysis of the video stream structure, a frame decoding model is proposed on the basis of fully considering the dependencies between frames and frame types. Key frames (generally referred to as I frames) are coded with greater redundancy, and predictive frames (generally referred to as S frames and P frames, etc.) may be coded with relatively small redundancy.

[0032] On this basis, an optimization algorithm for allocating network bandwidth resources between video source data and FEC data is established. For video decoding, the key frame preserves the largest part of the image coding information, so as far as possible to ensure that the key frame can arrive correctly, ...

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Abstract

The method includes following steps: (1) detecting whether transmission line is stable; (2) if transmission line is stable, then reducing redundancy; otherwise, increasing redundancy. Based on importance of information, the method determines forward error correction rate suitable to line dynamically, raises transmission speed, and makes application with high requirement on bandwidth possible to be realized on lower bandwidth.

Description

technical field [0001] The invention relates to communication technology, more specifically, to a transmission method for optimizing the redundant error correction rate of network data transmission. Background technique [0002] Forward Error Correction (FEC for short) is a very important anti-jamming algorithm. The FEC method of forward error correction is used to reduce the bit error rate of digital signals and improve the reliability of signal transmission. The main principle is to use the convolution algorithm to add redundant coded information to the transmitted transmission packet. When the receiving end detects that the received information is wrong or lost, it determines the location of the error through calculation and automatically restores it. According to different lines For the stability of the signal, different forward error correction rates can be selected, and the proportion of corresponding redundancy will be different. The higher the FEC redundancy code r...

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Application Information

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IPC IPC(8): H04L1/00H04L12/56
Inventor 区刚
Owner SHENZHEN TEMOBI SCI &TECH
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