高清H.264变换编码的流式实现

A Stream Implementation of Transform Encoding in HD H.264

H.264作为新一代视频编码标准,具有很好的性能,但计算复杂度比较高。Storm处理器是一款面向媒体应用和信号处理的高效能流处理器,在媒体处理方面具有很好的应用前景。针对H.264对计算性能的要求,本文给出了高清H.264(1080P)变换编码在Storm-SP16 G160流处理器上的流式实现。本文根据不同算法的数据流特征,结合具体的流化过程详细介绍了并行粒度选择以及数据流组织、规范化处理等流化技术。实验结果表明:编码的流式实现具有很好的性能,按照此编码效率加速整个程序可满足实时要求。提供了一种不同于硬件加速的程序加速方法,对其他媒体应用在流处理器上的映射具有很大的借鉴意义。

As a new coding standard,H264 achieves good performance,but that makes it more complicated.Storm is one of the high-performance stream processors aiming at media application and signal processing,and it has a good prospect in media processing.In order to match the requirements of the computing performance of H.264,this paper presents a stream implementation of transform encoding in H.264（1080P） on the Storm-SP16 G160 stream processor.Combining different features of data-flow with a specific process of streaming,the stream technologies are explicated in detail,such as choosing the parallel particles,organization of data flow,and standardization.Experimental results show that stream implementation achieves high performance,and it satisfies the requirements of real-time encoding by accelerating the whole program according to this encoding efficiency.This implementation not only provides a reference for streaming other applications,but also presents a new way to accelerate programs.