This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -

Mpeg是Motion Picture Expert Group的缩写。活动图像专家组是在1988年由ISO和IEC联合成立的专家组，负责开发电视图像数据和声音数据的编码，解码和它们的同步等标准。到目前为止已经开发和正在开发的MPEG标准有很多，主要包括Mpeg-1,Mpeg-2,Mpeg-4,和Mpeg-7.-Mpeg is the abbreviation of Motion Picture Expert Group. Moving Picture Experts Group in 1988