Method, device and system for controlling errors in wireless video communication system

Abstract

The present invention discloses a method for error control in a wireless video communication system. The method includes the following steps: a first user terminal receives and decodes the wireless video data transmitted by a second user terminal; when determining a decoding error in the wireless video data transmitted by the second user terminal according to the decoding result, the user terminal transmits to the second user terminal a message for indicating the implementation of error control, and implements local error control. The present invention also discloses a wireless video communication system and a user terminal. By the invention, the error control time of the wireless video communication system is greatly shortened, and system execution efficiency of error control procedure is increased, and thus the error propagation time of the wireless video data is greatly reduced, and the quality of wireless video data is improved, and further the quality of service of the wireless video communication system is efficiently improved, and the user experience is enhanced.

Description

technical field [0001] The invention belongs to the field of wireless video communication, in particular to a method, device and system for error control in a wireless video communication system. Background technique [0002] In the wireless transmission environment, due to the existence of shadows, multipath fading and other interference factors, it is prone to wireless signal instability and transmission quality degradation, especially the transmission of video data, which is more susceptible to interference from external factors, for example, In the video coding algorithm based on motion compensation, most video frames have a high correlation with the previous frame, and the error of any frame will be propagated and diffused to several subsequent frames, thus causing serious degradation of video quality. [0003] In the H.324-M specification used by the current 3G standard, it is stipulated that when the receiving end encounters a video decoding error, it can send a video...

AI Technical Summary

Problems solved by technology

During this time period, mobile phone B will still send video data to mobile phone A, and the subsequent video data sent may be affected by the error of video frame b2, so that video decoding image errors also occur; thus, mobile phone A The quality of the received video data has an impact, especially when the values ​​of T1 and T2 are large, the impact is more obvious, and the duration of the impact is relatively long, which seriously reduces the service of the wireless video communication system. QoS

Images