Transmission method and system for H264 coded video data in real-time communication

Abstract

The invention provides a transmission method for H264 coded video data in real-time communication. The method comprises the steps of forming H264 video codes into corresponding video frames, and generating an I frame, a B frame and a P frame in each video code stream; performing code stream packaging on the different types of video frames via a transmission protocol, and transmitting the packages into a network adapter physical layer via a transmission layer, a network layer and a data link layer; respectively placing the P frames and the B frames into two queues of a Video, placing the I frames into the queue of an audio, and then transmitting; during a transmission period, counting message transmission quantities of the queues within a limited interval, and computing a packet loss probability of each queue; adjusting GOP according to the packet loss probability of the I frame queue, and adjusting Reference according to the packet loss probability of the B frames; and when no B frame exists, adjusting the Reference according to the packet loss probability of the P frames. The invention also provides a transmission system for the H264 coded video data in real-time communication, and thus video transmission quality is improved.

Description

technical field [0001] The invention relates to a method for transmitting H264 coded video data in real-time communication. Background technique [0002] WLAN (Wireless Local Area Network) has become ubiquitous in our lives. At the same time, with the rapid development of multimedia applications, such as distance teaching, telemedicine, remote monitoring, etc., the video business data carried on the WLAN wireless data network is becoming more and more Huge, especially under the trend of further development of real-time video services, real-time video communication is actually used for the above-mentioned services, such as real-time video conferencing, real-time classroom, real-time medical diagnosis, etc. [0003] Due to the convenience of connecting anywhere and moving anywhere, WLAN basically adopts WLAN wireless connection for data interaction on most terminal receiving devices of the service network. However, based on the multipath attenuation and signal interference in ...

AI Technical Summary

Problems solved by technology

[0019] 1. The WLAN wireless network belongs to the open channel spectrum, and the network environment has greater complexity and variability. On this basis, by changing the attributes of the video source, such as the way of encoding bit rate to reduce the video transmission traffic will increase the upper layer. Coding complexity and affect image quality;

[0020] 2. In terms of video encoding, different frame types of H264 have different weight priorities. If the video I frame is lost, the entire video frame cannot be decoded, and then the related B frame and P frame will not be decoded even if the transmission is successful.

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