METHOD AND DEVICE FOR CONTROLLING VIDEO QUALITY FLUCTUATION BASED ON SCALABLE VIDEO CODING

摘要

Disclosed are a method and a device for controlling video quality fluctuation based on scalable video coding, which relate to the field of network video transmission, and are capable of coping with video quality fluctuation caused by sudden change of bandwidth, and capable of controlling video quality fluctuation more precisely. The method of the present invention comprises: performing scalable video coding on video data to be transmitted to generate a base layer and at least one enhancement layer; sending the video data undergoing the scalable video coding to a terminal device; determining a current expected code rate according to a transmission situation of the video data on a currently used channel, the current expected code rate being the maximum data transmission code rate capable of being burdened by the predicted currently used channel; obtaining the current highest enhancement layer according to the current expected code rate, the sum of all code rates occupied at the time of transmitting video data governed by the current highest enhancement layer being not greater than the current expected code rate; and sending the video data governed by the current highest enhancement layer to the terminal device.