Video bit rate adaptive method and system

Abstract

The invention discloses a video bitrate self-adaption method and system. The method includes the steps of A, receiving RR / SR packages to acquire the package loss probability; B, judging whether or not the package loss probability is less than lower-limited package loss probability threshold, or between the lower-limited package loss probability and upper-limited package loss probability, or greater than the upper-limited package loss probability; if the package loss probability is less than the lower-limited package loss probability threshold, executing the step C; if the package loss probability is between the lower-limited package loss probability and the upper-limited package loss probability, executing the step D; if the package loss probability is greater than the upper-limited package loss probability threshold, executing the step E; C, adding up number of times of the package loss probability in the first interval at a time; D, adding up number of times of the package loss probability in the second interval at a time; E, adding up number of times of the package loss probability in the third interval at a time; F, judging whether the total sum of number of times of the package loss probability from the first interval to the third interval is greater than preset number of threshold or not, if yes, executing the step G, and if not, executing the step A; G, adjusting video bitrate. With the method and system, accuracy in detection of the package loss probability can be improved, and frequent adjustment of the bitrate can be avoided.

Description

technical field [0001] The invention relates to a method and system for adaptive video code rate. Background technique [0002] Video chat applications on the Internet generally use udp to send packets for data transmission. When the packet is lost, because the decoder cannot receive a complete data frame, it can only decode when the next frame is received. In this way, it will cause Video freezes. In order to improve the video freeze situation, the data transmission can be adjusted through the bit rate adaptive method. The bit rate adaptation refers to a measure to appropriately reduce the bit rate and reduce the packet loss rate in the case of a large packet loss rate. [0003] The industry often uses RR / SR messages to obtain the packet loss rate of the sender, that is, the sender sends udp video packets with a certain probability, and each video packet includes a short serial number, which is incremented by 1 each time, and the receiver is in Count the number of udp pac...

AI Technical Summary

Problems solved by technology

This method judges the current network status through one RTCP feedback message, and adjusts the code rate accordingly. Obviously, one RTCP feedback message has no statistical significance, the judgment error is large, and frequent adjustments to the code rate are also difficult. Will affect the stability and reliability of communication

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