文章基本信息

标题：Efficient MPEG-4 to H.264/AVC Transcoding with Spatial Downscaling
本地全文：下载
作者：Nguyen, Toan Dinh ; Lee, Guee-Sang ; Chang, June-Young 等
期刊名称：ETRI Journal
印刷版ISSN：1225-6463
电子版ISSN：2233-7326
出版年度：2007
卷号：29
期号：6
页码：826-828
语种：English
出版社：Electronics and Telecommunications Research Institute
摘要：Efficient downscaling in a transcoder is important when the output should be converted to a lower resolution video. In this letter, we suggest an efficient algorithm for transcoding from MPEG-4 SP (with simple profile) to H.264/AVC with spatial downscaling. First, target image blocks are classified into monotonous, complex, and very complex regions for fast mode decision. Second, adaptive search ranges are applied to these image classes for fast motion estimation in an H.264/AVC encoder with predicted motion vectors. Simulation results show that our transcoder considerably reduces transcoding time while video quality is kept almost optimal.
关键词：MPEG-4 part 2;H.264/AVC;transcoder;motion estimation;mode decision;spatial downscale