面向媒体的粗粒度可重构架构层次化存储设计  

Hierarchical Memory Optimization Based on Coarse Grain Reconfigurable Architecture for Multimedia Application

作　　者：曹鹏[1] 梅晨[1] 刘波[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京2100961

出　　处：《上海交通大学学报》2014年第10期1389-1393,1399,共6页Journal of Shanghai Jiaotong University

摘　　要：为了优化粗粒度可重构架构REMUS-II(Reconfigurable Multimedia System 2)的数据流通路,使其能够完成高性能媒体解码,针对媒体算法的数据访问特征,对REMUS-II的片上存储与片外存储访问模块进行优化.片上存储通过二维数据传输和转置等访问模式进行优化,片上数据传输效率分别平均提高了69.6%和15.1%.片外存储通过块缓存设计优化参考帧访问,平均减少37%的外存访问时间.经过层次化存储设计,REMUS-II数据流可满足计算需求,在200MHz主频下实现H.264算法和MPEG2算法高级档次的1 920像素×1 080像素高清分辨率实时解码.In order to optimize the data flow of coarse grain reconfigurable architecture REMUS-II（Recon- figurable Multimedia System2） for high performance media decoding, a novel memory sub architecture of on- and off-chip memory was proposed by analyzing the data access pattern for multimedia application. For on-chip memory, the 2D-data and transpose transfer technique was employed to improve the data transfer efficiency by 69.6% and 15.1% on average, respectively. For off-chip memory, the block buffer was implemented to reduce the reference frame accesses with a 37% reduction of accessing time on average. With the memory hierarchy optimization, REMUS-II can achieve real-time H. 264 high profile and MPEG2 high level decoding with a definition of 1 980 pixel× 1 080 pixel at 200 MHz clock frequency.

关 键 词：粗粒度可重构架构 媒体应用 层次化存储 高清解码 

分 类 号：TN302[电子电信—物理电子学]