集成数字视频系统中海量数据的高性能低功耗存储方法研究

项目名称： 集成数字视频系统中海量数据的高性能低功耗存储方法研究

项目编号： No.60871005

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 乔飞

作者单位： 清华大学

项目金额： 30万元

中文摘要： 集成数字视频系统目前是学术界和工业界的热点研究问题。随着应用环境对性能要求的提高和处理视频规模的不断增大，数字视频系统中的存储结构已经成为制约系统性能的"瓶颈"问题，并且现有存储结构在处理海量视频数据时消耗的能量占系统总能耗的比例不断攀升。针对以上问题，本项目通过参考帧重压缩算法减少核心解码器与外部存储器交互的数据量，并采用创新的存储地址映射算法降低存储器的"行激活"次数。同时，本项目通过对存储的数据进行低功耗编码的方法降低存储器的静态功耗。最后，本项目通过设计多端口存储控制器提高存储器的带宽效率。 本项目组已经发表国际会议论文7篇，国际期刊7篇，国内核心刊物3篇；其中SCI检索2篇，EI检索13篇，ISTP检索3篇。申请中国发明专利4项，其中1项已经获得授权。本项目培养博士研究生3人，其中1人已经毕业并获得博士学位；培养硕士研究生6人，其中4人已经获得硕士学位。 本项目所研发低功耗存储优化和控制技术，以及多端口存储控制器等结构，已经应用于本项目组多核视频处理体系结构，以及智能视频处理平台等相关国家级项目和国际合作项目的研究开发中。

中文关键词： 数字视频编解码系统；低功耗；存储控制；数据管理

英文摘要： Many efforts have been made by the acdemic and the industrial fields to implement low power and high performance integrated video systems, for their prevailing applications in the consumer markets. With the increasing performance requirements and the emerging high-definition video systems, the memory architectures of such systems become the performance bottle-neck, as well as the higher and higher power consumption when dealing with massive video data. In this project, the viedo data of the reference frames could be recompressed to reduce the bandwidth requirements between the inside decoder and the outside memory. Also, the novel memory address mapping algorithm could be applied to reduce the number of so-called "Row Activations". As to the static power of memory subsystems, the video data could be encoded in some low-static-power modes before being stored in the memory. Last, according to the characteristics of the video codec system, the multi-port memory controller could be realized to increase the bandwidth efficiency. So far, 7 international conference papers and 10 journal papers have been published, in which 2 of them are indexed by SCI, 13 of them are indexed by EI and 3 of them are indexed by ISTP database,respectively. More, 4 patents of invention are applied, in which one of them has been granted. During the carrying out of the project, one Ph.D. student and 4 Master students got their degrees.Currently, 2 Ph.D. students and 2 Master students are still working on the related topics. The presented technologies, such as memory optimizing and controlling, multi-port memory controller, have been integrated in the national and international coopration funding grants, focusing on multi-core video processing systems and platforms for intelligent processing.

英文关键词： Digital Video Codec Systems; Low Power; Memory Management; Data Management