Video communication method for dynamically changing video code and system thereof

Abstract

The invention relates to a video communication method for dynamically changing a video code. The method comprises the following steps: obtaining an order for changing the size of a video window at a video receiving end; generating a code changing signaling according to the order for changing; transmitting the code changing signaling to a video transmitting end; and receiving and modifying the code parameters of a coder in a real-time manner by the video transmitting end according to the code changing signaling. The invention also relates to a video communication system for dynamically changing the video code. According to the method and the system provided by the invention, a signaling for noticing the change of the code parameters is transmitted to the video transmitting end instantly when the size of the video window at the video receiving end is changed. The transmitting end can adjust the code parameters of the coder according to the parameters in the signaling, and adjust the bandwidth and CPU (central processing unit) requirements of each circuit in a self-adaptive way based on the feedback of the RTCP (real time control protocol), therefore, the network bandwidth and the CPU resource can be utilized more timely, reasonably and efficiently.

Description

【Technical field】 [0001] The invention relates to the field of image communication, in particular to a video communication method for dynamically changing video coding, and also to a video communication system for dynamically changing video coding. 【Background technique】 [0002] With the development of network communication technology, the application of video communication between communication terminals is becoming more and more common. [0003] In traditional video communication technology, when the size of the video window at the local receiving end changes (for example, the user manually zooms in), the receiving end uses the real-time transport protocol control protocol (RTCP) to send notifications based on the statistical results of video quality within a certain period of time. The end video source encoder dynamically changes the parameters such as encoding rate, resolution, bit rate, frame rate, etc., and finally adapts to the change of window size. Therefore, the ...

AI Technical Summary

Problems solved by technology

In order to fully adapt to operations such as changes in the video window at the receiving end, the sending end needs a certain response time, and the efficiency is not high

Especially when reducing a large window to a small window, it takes a lot of time and wastes a lot of bandwidth resources, which affects the more effective use of bandwidth and CPU resources for other videos.

When the small window is stretched to a large window, the sending end still uses a smaller resolution encoding, which affects the quality of the video playback at the receiving end

Images