基于流体系结构的帧内预测算法优化设计  

Optimized Design of Intra Prediction Algorithm on Stream Architecture

作　　者：李海燕[1,2] 张春元[1] 付剑[1] 

机构地区：[1]国防科学技术大学计算机学院,湖南长沙410073 [2]海军指挥学院海战实验室,江苏南京210016

出　　处：《电子学报》2010年第5期1014-1020,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60673148;No.60703073);国家863高技术研究发展计划(No.2007AA01Z286);高等学校博士学科点专项科研基金(No.20069998025)

摘　　要：为高效实现H.264多模式帧内预测,解决其计算复杂度高造成的计算压力,本文根据H.264帧内预测算法的计算密集与数据并行的特征,基于流处理执行模型提出适用于Imagine流体系结构的分组帧内预测流算法,并采用长流分段技术进行优化设计.实验结果表明,H.264帧内编码器流实现对1280×720高清视频编码帧率达45.9fps,满足实时性需求.Multi-mode intra prediction in H.264 is computationally expensive. For efficient implementation to reduce computing pressure, according to computation intensity and data parallelism in intra prediction, a multi-group intra prediction stream algorithm suited for imagine stream architecture is proposed based on stream execution model. In addition, strip-mining technology is applied into streaming implementation to design an optimized strip-mined multi-group intra prediction stream algorithm. Experimental results show that H.264 intra coder using optimized stream algorithm processes 1280× 720 HD video at 45.9fps, satisfying the requirements of real-time video applications.

关 键 词：视频编码 H.264 帧内预测 流处理 长流分段 循环展开 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]