Efficient video downscaling transcoder from MPEG-2 to H.264  

作　　者：Xiang-wen WANG Jun SUN Rong XIE Song-yu YU 

机构地区：[1]Shanghai Key Lab. of Digital Media Processing ＆ Transmissions, Institute of lmage Communication ＆ Information Processing, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2008年第4期457-463,共7页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. CNGI-04-15-2A) supported by the China Next Gen-eration Internet (CNGI)

摘　　要：The new H.264 video coding standard achieves significantly higher compression performance than MPEG-2. As the MPEG-2 is popular in digital TV, DVD, etc., bandwidth or memory space can be saved by transcoding those streams into H.264 in these applications. Unfortunately, the huge complexity keeps transcoding from being widely used in practical applications. This paper proposes an efficient transcoding architecture with a smart downscaling decoder and a fast mode decision algorithm. Using the proposed architecture, huge buffering memory space is saved and the transcoding complexity is reduced. Performance of the proposed fast mode decision algorithm is validated by experiments.The new H.264 video coding standard achieves significantly higher compression performance than MPEG-2. As the MPEG-2 is popular in digital TV, DVD, etc., bandwidth or memory space can be saved by transcoding those streams into H.264 in these applications. Unfortunately, the huge complexity keeps transcoding from being widely used in practical applications. This paper proposes an efficient transcoding architecture with a smart downscaling decoder and a fast mode decision algorithm. Using the proposed architecture, huge buffering memory space is saved and the transcoding complexity is reduced. Performance of the proposed fast mode decision algorithm is validated by experiments.

关 键 词：Video transcoding Mode decision Edge direction analysis 

分 类 号：TN919.8[电子电信—通信与信息系统]