一种MPEG-2到H.264转换编码方案  

Transcoding Scheme for MPEG-2 to H.264

作　　者：杨蕾[1] 戴居丰[1] 宋晓炜[1] 侯春萍[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《计算机应用》2007年第1期231-233,共3页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60672077)

摘　　要：提出了MPEG-2到H.264的转换编码方案。该方案中,帧内预测使用了8×8块的DCT-HT的变换域转换,然后在HT域进行Intra模式判决得出最优模式,从而得到理想的帧内预测;帧间预测重用了MPEG-2码流中变字长解码得到的运动矢量MV,作为H.264的PMV,通过重新设定运动预测模式以及搜索范围,从而获得较好的预测效果。实验结果说明该方案是可行的。A transcoding scheme for MPEG-2 to H. 264 was provided. This scheme was composed of two parts： intra prediction and inter prediction. For the intra prediction part, 8 × 8 block DCT-HT transform-domain converse was used, and then intra mode decision was done in HT domain to obtain the optimum mode, so that good intra prediction was acquired. For the inter prediction part, Motion Vector （MV） got from Variable Length Decoding （VIA）） in MPEG-2 stream was reused as Prediction Motion Vector （PMV） of H. 264, then motion prediction mode and search region were reset, so that better prediction result was acquired. Experimental results show that this scheme is feasible.

关 键 词：MPEG-2 H.264 转换编码 运动矢量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]