Method and system for video live broadcast transmission control based on pid control

Abstract

The present invention provides a method and system for controlling live video transmission based on PID control, wherein the method for controlling live video transmission based on PID control includes: detecting the real-time code rate of the system and the real-time length of the video transmission buffer according to a predetermined detection period, Wherein, the real-time length of the video sending buffer is the number of buffered video frames; calculate the difference between the real-time length of the video sending buffer and the length target value; bring the difference into the PID control formula to calculate The code rate adjustment value required at the current moment is obtained; and the real-time code rate is adjusted according to the code rate adjustment value. Through this technical solution, the real-time bit rate can be corrected, the data volume of the video sending buffer can be maintained in an ideal state, the video quality can be self-adapted according to the network conditions, and the smoothness of the live video can be improved as much as possible Use network bandwidth to achieve higher video quality.

Description

technical field [0001] The present invention relates to the technical field of video transmission, in particular to a PID control-based live video transmission control method and a PID control-based video live transmission control system. Background technique [0002] With the popularization of broadband and the development of network technology, multimedia services on the Internet have gradually become the mainstream. The previous generation of video applications was mainly based on video-on-demand services. With the gradual improvement of network conditions and the continuous development of video technology, people's demand for live video broadcasts continues to grow, and applications based on live video services have also begun to emerge rapidly, such as Live TV programs, video conferences, video calls, etc. Among them, the latest live broadcast application allows users to create live broadcast content through mobile devices. [0003] In order to ensure the real-time pe...

AI Technical Summary

Problems solved by technology

[0006] However, although the network environment has been continuously improved, fluctuations in network conditions still occur frequently, and fluctuations in network conditions will directly affect the throughput of data transmission by the TCP protocol

Among them, the video bit rate is the number of data bits transmitted per unit time during data transmission. If the throughput is lower than the bit rate of the currently transmitted video, it will cause the video playback at the receiving end to be unsmooth.

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