A video receiving method and system for adaptive retransmission waiting time

Abstract

The invention discloses a video receiving method and system for adaptive retransmission waiting time. The method includes: S1: continuously receiving the rtp data packet corresponding to each frame of video data, and sequentially judging whether the rtp data packet of each frame of video data satisfies a complete frame according to the sequence of video frames; S2: if it is judged that a certain frame of video data If the rtp data packet of the data satisfies a complete frame, it is output to the decoding layer for decoding and display; otherwise, the retransmission waiting time is dynamically adjusted; S3: If the rtp data packet missing from a certain frame of video data is successfully received within the retransmission waiting time, Then output to the decoding layer for decoding and display; otherwise, discard the video data of this frame and traverse the rtp data packet of the next video data. The method dynamically adjusts the retransmission waiting time by combining the retransmission packet time and the frame interval time, thereby reducing the video freeze phenomenon and achieving the purpose of improving the video decoding effect of the command and dispatch system.

Description

technical field [0001] The invention relates to a video receiving method for adaptive retransmission waiting time and a corresponding video receiving system, belonging to the field of IP multimedia monitoring and dispatching communication. Background technique [0002] At present, the video call in the IP multimedia monitoring and dispatching system obviously affects the quality of the video under the condition of poor network conditions, resulting in video freeze and delay. [0003] The existing video receiving method generally receives a complete frame of video data packets and sends the frame of video data packets to the decoding layer for decoding and displaying. In the case of network packet loss and out-of-sequence, incomplete video frames will be cached, and after receiving retransmission packets or out-of-order packets, the sorting process will determine the complete video frame and then send a frame of video data to the decoding layer To decode and display. [000...

AI Technical Summary

Problems solved by technology

[0004] In addition, when the network is not good, once the received video data packets are lost, the video data packet sorting and caching process will always wait for the lost packets to be transmitted to the local

If the waiting time for lost packets is set too large, it will wait forever when there are lost packets and the retransmission fails, resulting in serious freezes in the video decoding process

If the waiting time for lost packets is set too small, the retransmitted packets or out-of-sequence packets will be discarded before being transmitted locally, resulting in aggravated video freezes and serious degradation of video quality

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