MPEG-2混合编码的实时实现

设计了一个针对“高清晰度电视功能样机”信源编码的混合编码模块硬件电路。根据“高清晰度电视功能样机”信源编码方案一，采用“十”字划分的方法将HDTV画面划分成四个ITU－Rec．601画面，每个画面的信源编码部分由运动估计模块，运动补偿模块，混合编码模块组成。这里的混合编码模块土要完成DCT，量化，逆量化，IDCT，扫描变换，游程编码，Huffrnan编码，各种其它数据的变长编码，以及视频码流形成等工作。

A hybrid encoding hardware for the prototype of HDTV is introduced in this paper. According to the first scheme, a HDTV picture is divided into four ITU-Re. 601 pictures, each one of which is encoded separately hy a motion prediction module, a motion compensation module, and a hyhrid encoding module. The hyhrid encodiing module here implements DCT, quantization, inverse DCT, inverse quantization, scanning transformation, run length coding, Huffman coding, varible length coding for other coefficients, and video stream making.