Scheduler method for low time delay multimedia transmission coding/decoding based on time-sharing processing

Abstract

This invention relates to a method for low time delay multimedia transmission code / decode dispatch based on time-sharing processing which is to divide a code-decode time T into time slices k first, each is T / k, processed general channels are N, N / K is the channel number in each time slice then to process data input from each channel according to the sequence of time slice to be output. This invented method divides the maximum code-decode process time T into time slice k, so as to assign N channels in originally processed time T to smaller time slices to reduce channel time delay, the larger the k, the shorter the time slice is, and the shorter the time slice, the more the time delay reduced.

Description

technical field [0001] The invention relates to a low-delay multimedia transmission codec scheduling method based on time-sharing processing, and belongs to the technical field of codec processing in multimedia transmission. Background technique [0002] The 21st century will be a century of continuous and rapid development of the information industry, and mankind has entered the era of network economy. The rapid development of network technology makes it possible and a reality to use packet technology to transmit multimedia. The integration trend of traditional communication technology and packet technology is becoming more and more obvious. Since the media stream encoding methods transmitted in traditional communication networks and modern packet communication networks are different, it is necessary to implement media stream encoding and decoding methods at the junction of traditional networks and packet networks. convert. Since the existence of the codec will introduce ...

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Problems solved by technology

[0012] But its disadvantage is that the maximum delay of encoding and decoding of the channel is relatively large. Taking the G723 encoding method as an example, it takes 30ms to form a frame of data, so T=30ms. When using the batch processing method, the processing delay in the encoding direction is 30+T = 60ms, plus a fixed prefetch delay of 7.5ms determined by the algorithm (see ITUTG729 protocol), the total delay in the encoding direction is 67.5ms, it can be seen that this delay is still relatively large, especially in voice transmission , a large delay will greatly reduce the quality of voice calls

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