基于多核处理器的高清实时MPEG-2——H.264转码器设计  

Design of HD MPEG-2—H.264 Transcoder Based on Multi-core Processor

作　　者：叶朝敏[1] 陈颖琪[1] 高志勇[1] 

机构地区：[1]上海交通大学电子工程系图像通信与信息处理研究所,上海200240

出　　处：《电视技术》2012年第21期15-19,共5页Video Engineering

摘　　要：基于多核处理器的并行计算为实时实现高清MPEG-2至H.264转码器提供了1种可行的实现方案。提出了1种多颗粒度的MPEG-2—H.264全解全编并行转码器设计方案,其中MPEG-2解码器采用了帧内与数据级两级并行,H.264编码器采用了帧间、帧内与数据级三级并行。实验结果表明本设计不仅具有良好的并行加速比,而且可以在使用1/4的TilePro64处理器核资源的条件下完成1路实时高清转码。Parallel computing provides a practical solution to implementation of MPEG2-H. 264 Transcoder. A novel multi-grain parallel algorithm for MPEG2-H. 264 transcoder, with Slice-based and SIMD-based parallelism for MPEG-2 decoder, as well as Frame-based, Slice-based and SIMD- based parallelism for H. 264 encoder, is proposed. Experiment indicates that this algorithm is not only of outstanding parallel acceleration ratio, but also capable of real time transcoding for one channel HD video, using only one quarter of total resources.

关 键 词：MPEG-H.264转码器 Tilera多核处理器 多粒度并行计算 

分 类 号：TN949.292[电子电信—信号与信息处理]