Research Progress on Rate Control Technology in Video Transmission
视频传输中的码率控制技术研究进展毕迎春王相海

Rate control scheme plays an important role in improving and smoothing the decoding video quality.Over the years,rate control techniques have been studied very intensively for various standards and applications,such as video conferencing with H.261 and H.263,storage media with MPEG-1 and MPEG-2,and the recent video object coding with MPEG-4.This paper firstly described the basis of rate control problem.And secondly classic rate control technology in the standard was introduced.Thirdly we summed up the present techniques as three kinds: rate control technique based on DCT video coder,rate control technique based on wavelet video coder and rate allocation of Fine Granular Scalable video coding.Then we generally discussed and compared the three kinds of methods including the core idea and the advantages and disadvantages of every algorithm of each kind of techniques.Finally,the state of art and possible new directions of rate control were stated.