一种用于视频显示的高性能存储器系统(英文)  

A High Performance Memory System for Video Display

作　　者：张乃燃[1] 侯立刚[1] 吴武臣[1] 

机构地区：[1]北京工业大学集成电路与系统实验室,北京100022

出　　处：《电子器件》2008年第1期268-272,共5页Chinese Journal of Electron Devices

摘　　要：提出了在视频显示应用中的新型存储器系统架构。为保证流畅的视频图像放映,片下存储器的访存成为影响系统性能的关键因素。首先具体分析图像中所划分块的运动矢量以减少访存行为,从而减少60%的周期数。第二,有效地访存方法为视频数据的传输提供了充足的带宽。为保证不同类型的信号之间没有干扰,安排了专用的存储器系统结构。相应地,一个专用于参考帧存取的本地AMBA实现了高速存取,双存储器控制器也使总线更加有效。根据以上方法,实验结果显示在60兆赫兹下,系统可以完成每秒30帧的实时高清(720p)解码。This paper proposes novel memory system architecture for video display. To display video stream smooth, off-chip memory access is crucial factor in motion compensation and display feeder. First of all, the paper presents new memory access scheme based on motion vector analysis. More than 60% reduced cycle number is reported. Secondly, efficient memory access style for display feeder contributes sufficient bandwidth for data transfer, and special memory system keeps data undisturbed with each other. Accordingly, a special local AMBA only used for reference frame makes memory access at high speed and dual memory controllers make bus efficient. Experiment results show that the design supports 30 f/s real-time digital-HDTV 720p clocking at 60 MHz.

关 键 词：存储器系统 视频显示 带宽 H.264/AVC 

分 类 号：TN27[电子电信—物理电子学] TN47