解码MPEG4视频流中interlace宏块的原理和实现方法

Principle and Implementation Interlale Macroblock in Decoding MPEG4 Video Frequency

在 MPEG4中 interlace可以做到宏块级。当宏块使用 interlace的方式进行编码的时候 ,可以结合 dct_ type,field_ prediction,forword_ top_ field_ reference,forword_ bot_ field_ reference等标志来确定 interlace宏块的解码方法。

In the moving picture standard MPEG4 the interlace can seen in the macroblock.When the sign interlaced is set to coding. In accordance with some other signs such as dct _type, field _prediction, forword _top _field _reference, forword _bot _field _reference, we could get the key information of the interlaced macroblock. And with the correct approach we could decode the coded bit stream and reconstruct the macroblock and VOP.