摘要
移动多媒体的迅猛发展及视频压缩标准复杂度的不断提升对硬件平台提出了更高的要求。TMS320DM320是TI公司推出的多媒体处理器。内部为ARM+DSP+视频加速引擎IMX的新型处理器架构广泛支持主流音视频压缩标准。视频加速引擎IMX是高性能的运算加速单元,支持多种复杂解码操作。介绍了TMS320DM320,并对H.264解码器进行性能分析,提出了运算复杂模块针对IMX的优化方案,并以耗时的逆变换、逆量化与亮度分量运动补偿为例,测试并评估IMX实现H.264复杂算法的性能。经测试,使用IMX视频解码运算可以获得9倍以上的速度提升。
The fast development of mobile multimedia and video compression raises higher requirement for hardware platform. TMS320DM320 is the multimedia processor of Texas Instruments. With the new architecture of ARM ＋ DSP ＋ Hard Engine IMX, it widely supports prevalent video and audio compression standards. The hard engine IMX is high performance video accelerator, which supports multiple decoding operations. This thesis presents brief introduction of TMS320DM320. Based on the analysis of H.264 decoder, it discusses the optimization of decoding algorithms on IMX, tests and evaluates the performance of IMX on H. 264 time - consuming algorithms, such as inverse transformation, inverse quantification and luminance MC. According to the results, with IMX, decoding operations could reach over 9x rate exaltation.
出处
《信息技术》
2007年第7期49-51,146,共4页
Information Technology
