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基于数字多用视频光盘（ＤＶＤ）视频编码在应用ＭＰＥＧ－２ 可变码率压缩算法时要求一种新的码率控制方法，在美国电信科学学院建立的一套图像质量Ｓ评估的基础上，研究了Ｓ和编码码率的关系．Ｓ较低时，Ｓ与编码码率成正比关系．为实现可变码率编码，在线性增长区，对可变码率的编码算法给出了一套计算公式，使得在一定平均码率下，对一定的图像序列进行可变码率编码，得到相对恒定的Ｓ．
Based on Digital Versatile Video Disk (DVD) Video Coding, a new bit rate control method is applied in applying MPEG-2 variable bitrate compression algorithm. Based on a set of image quality S evaluation established by the American Academy of Telecommunications Sciences, The relationship between S and coding rate. When S is low, S is directly proportional to the code rate. In order to realize the variable bit rate coding, a set of calculation formulas for the variable bit rate coding algorithm are given in the linear growth area, so that under a certain average bit rate, variable bit rate coding is performed on a certain image sequence to obtain Relatively constant S.