Video service quality-based hybrid selective repeat method

Abstract

The invention discloses a video service quality-based hybrid selective repeat method, which mainly solves the problems of reduced data transmission quantity, large transmission delay and poor video information continuity caused by unnecessary cost in the prior art. The method is implemented by the following steps of: first, calculating a video subjective quality objectified value by utilizing a video subjective quality objectifying model, and calculating a data transmission redundancy range which cannot cause network congestion by using a network broadband which feeds back from a receiving end to a transmitting end; then, according to the data transmission redundancy range, allocating proportions to forward error correction redundancy and selective repeat redundancy to optimize the video subjective quality objectified value; and finally, selecting a code pattern for coding according to the forward error correction redundancy, and determining the number of packets needing to be repeated according to the selective repeat redundancy. In the method, forward error correction control and selective repeat error control are taken into consideration at the same time, so that the time cost and the network cost are reduced; therefore, the method can be used in a video transmission system.

Description

technical field [0001] The invention belongs to the field of video communication, relates to a method for selective retransmission of RTP packets and a forward error correction method, and can be used for error control of video communication systems and multimedia streams such as audio and data in network transmission. Background technique [0002] With the rapid development of multimedia technology and communication networks, multimedia applications have become an indispensable part of the Internet and gradually become a part of people's daily life. Many real-time multimedia applications, such as video conferencing, VoIP and streaming media players, are constantly emerging. These applications not only facilitate information exchange but also enrich people's entertainment life. Although the current multimedia applications have made great progress, they are private and not flexible enough to provide users with a satisfactory visual experience, such as Real Player and Windows ...

AI Technical Summary

Problems solved by technology

Both Type-II HARQ and Type-III HARQ are incrementally redundant HARQ, and the retransmitted data is blind, which means that part of the retransmitted data may not contribute to decoding at all, so the amount of retransmitted data is also large. Increased delay and waste of network bandwidth

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