Study on Rate Control Algorithms in Video Coding

Rate control is one of the key issues in video coding responsible for the coordination among the encoder,the channel and the decoder,hence plays a very important role in video compression.In this paper,rate control technique in the video compression is investigated.Based on the adopted rate distortion models,a number of typical rate-control algorithms in MPEG-2,H.263,MPEG-4 and H.264 are reviewed and discussed,and further discussions are made on prospects of rate control technology.