Real-time video transmission dynamic delay control system based on timestamp and packet loss detection

Abstract

The invention relates to a real-time video transmission dynamic delay control system based on timestamp and packet loss detection. The real-time video transmission dynamic delay control system comprises a sending end and a receiving end, the sending end comprises an audio and video coding unit and a sending cache unit which are connected with each other; the receiving end comprises a receiving cache unit, a video recombination unit, a delay processing unit and an audio and video decoding unit; the receiving cache unit is respectively connected with the video recombination unit and the delay processing unit; the video recombination unit is also connected with the audio and video decoding unit; the transmitting end and the receiving end are connected through a link; and the delay processing unit adopts a smooth delay strategy. According to the invention, further deterioration of the network can be effectively avoided, the utilization rate of network resources is increased, the buffer time of the data packet is dynamically adjusted in advance in real time, limited network resources are saved, and high reliability of video transmission and user experience are improved.

Description

technical field [0001] The invention relates to the field of video transmission, in particular to a real-time video transmission dynamic delay control system based on time stamp and packet loss detection. Background technique [0002] At present, the demand for mobile Internet applications has surged, and high-traffic application scenarios such as short videos and live broadcasts have driven the rapid growth of mobile Internet traffic. Therefore, how to handle the growing demands of streaming media applications in unreliable wireless links becomes more and more important. In real-time video transmission, in order to ensure the smoothness of the received video during playback, usually, strict clock synchronization is performed between the video transmitter and receiver, that is, a fixed clock is set between the transmitter and receiver. end-to-end delay. Under the fixed end-to-end delay, after receiving the video packet, it will be buffered first, and after waiting for a pe...

AI Technical Summary

Problems solved by technology

However, in a wireless environment, the bandwidth and delay of the transmission link vary widely. If you set a small end-to-end delay, it will cause no data in the buffer and no playback after the playback time, resulting in freezes.

If a large end-to-end delay is set, the delay will be too large

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