文档介绍：西安电子科技大学
硕士学位论文
姓名:吴汶泰
申请学位级别:硕士
专业:通信与信息系统
指导教师:宋彬
201201
摘要
摘要
,在码率方面它表现出了很好的网络亲和力。,。随着人们对图像质量要求的提高,在面对高清视频源、超高清视频源时,DSP的处理能力显得捉襟见肘。FPGA最显著的特点是其并行处理的能力,除此之外FPGA有很强的处理复杂逻辑的能力,有丰富的I/o、逻辑运算资源。随着大规模集成电路的持续发展,FPGA逻辑资源规模越来越大,成本也越来越低, 基于FPGA的视频图像处理逐渐成为人们关注的热点。
,提出了一种基于模式并行(Mode pute,MPC)的帧内预测架构。该架构能够对每个宏块的9种帧内预测模式同时进行分析,避免大量中间值的重复运算,既简化了帧内预测运算,又减少了资源消耗。在xc5vlx330t硬件平台下进行综合仿真表明,该架构消耗 20177个片内寄存器,35475个LUT,10223个Slice。该架构最高工作频率为219MHz, 处理一个宏块需要657个时钟周期,按照整体编码器100MHz的工作频率,该架构
可以实现******@18fps的编码。在此基础之上,本文又提出一种基于宏块流水(Macroblock Pipelined Process,
MPP)的帧内预测架构,最终实现流水度为2的基于MPP的帧内预测架构。该架构能够同时处理两个没有数据依赖关系的宏块,与MPC架构相比,资源消耗增加近 15%,能够降低帧内预测时间约50%。在xc5vlx330t硬件平台下的综合仿真结果表明该架构的最高工作频率为186MHz,每处理两个宏块需要710个时钟周期,即每个宏块只需要355个时钟周期。按照整体编码器100MHz的工作频率,该架构可以支持1 ******@30fps的实时编码。
关键词: FPGA 帧内预测并行流水
目录
Abstract
has e the most mainstream pression standard which shows work affinity in bit , is able to get such superior performance due to the contribution of significant increase plexity, which is about three times as recent growth of image quality requirements, DSP’s processing power es out at elbows in the face of High Def'mition or even Ultra Hilgh Definition video most particular characteristic of FPGA is parallel processing ability,besides,FPGA has quite strong ability on processing
complex logic,and it is rich in I/0 and logic the continuous
development of large scale integrated circuit,the size of FPGA logic resource grows even larger while the cost falls,the video image processing based on FPGA gradually es the focus of research.
TIlis paper proposed all intra predict architecture of mode pute(MPC) based on the systematic analysis of the key technology of architecture call avoid putation of the intermediate values by analyzing all the 9 intra prediction modes at the same time,both simplif