Fast Intra Downsizing Based on Direction for H.264/AVC Transcoding

作     者：张健 沈庭芝 姜薇 张颖 

作者机构：School of Information and ElectronicsBeijing Institute of Technology 

出 版 物：《Journal of Beijing Institute of Technology》 (北京理工大学学报（英文版）)

年 卷 期：2009年第18卷第3期

页      面：313-317页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081001[工学-通信与信息系统] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Sponsored by the National Natural Science Foundation of China(60772066) 

主　　题：transcoding downsizing intraprediction 

摘      要：A fast algorithm based on direction in intra frame downsizing in H.264 is proposed,which used modes information of macroblocks before transcoding and the direction relation of modes between decoding and re-encoding in *** algorithm also made use of statistics between decoded modes and re-encoded modes,which came from a lot of sequences data *** full modes encoding,it can improve the speed of reducing intra-prediction frame resolution *** to traditional transcoding,it only needs to compute one of thirteen modes in *** experiments show that this algorithm can significantly speed up 92 percent transcoding time in intra-prediction frame of H.264 with slight PSNR *** also can support an improvement in real-time for transcoding and ability of bandwidths changing.