A New Adaptive Rate Control Algorithm with Spatial Scalability for Video Coding
一种空域可分级的自适应视频码流控制方法

In the traditional CBR rate control algorithm, the skipping method is adopted to combat the overflow of video buffer, in which the motion compensation error and picture distortion are increased with the number of skipping frame. To deal with the disadvantage of traditional skipping method, a new adaptive rate control algorithm with spatial scalability for video coding is presented in this paper. In the method, the original skipped frame is adaptively sub-sampled at encoder and is up-sampled in decoder. Simulation results show that this scheme can highly improve the quality of reconstructed video and obtain a gain of about0.3-0.8dB and 0.1-0.4dB in PSNR respectively compared with the traditional skipping method and the method of increasing quantization step.