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

A technology for video data transmission and real-time communication, applied in transmission systems, electrical components, etc., can solve problems such as affecting image quality, unreasonable weight priorities, and increasing coding complexity, preventing delays or packet loss, and ensuring video transmission. quality effect

Inactive Publication Date: 2017-07-21
FUJIAN STAR NET WISDOM TECH CO LTD
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  • Application Information

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. C

Method used

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

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Embodiment Construction

[0053] Such as figure 2 As shown, the H264 encoded video data transmission method in the real-time communication of the present invention comprises the following steps:

[0054] Step 1. Encode the H264 video to generate corresponding video frames, and generate I frames, B frames, and P frames in each video stream;

[0055] Step 2. Pack different types of video frames through the transport protocol for code stream packaging, and reach the physical layer of the network card through the transport layer, network layer and data link layer;

[0056] Step 3. Place P frames and B frames in the two queues of Video respectively, and place I frames in the queue of Audio. According to different frame types, among the power-saving cached messages, I frames are preferentially selected for transmission , followed by a P frame, and finally a B frame; when the I frame is sent, the P frame is sent, and finally the B frame is sent, and the P frame is stored in the high-priority queue in Video,...

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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 ...

Claims

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Application Information

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IPC IPC(8): H04L29/06
CPCH04L65/80H04L65/762H04L65/70
Inventor 苏毅龙魏和文
Owner FUJIAN STAR NET WISDOM TECH CO LTD
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