面向异步视频的嵌入式图像处理系统设计

在此设计出一种基于DSP-kFPGA技术的面向异步视频的嵌入式图像处理系统，以一种灵活的架构避免了帧间不同步方法对双口RAM显存的需求，既能够保证图像输出质量，又有利于提升图像处理的性能指标。系统以FPGA为核心，连接DSP和4片帧存，通过帧存的循环复用将缓存和显存融合起来，省略了数据搬运的环节。当输入帧频小于输出帧频时，从系统总体的角度分析帧存的状态转换规律；当输入帧频大于输出帧频时，从单个帧存的角度分析帧存的状态转换规律，并给出了可鳊程逻辑设计的源程序。该方案已在产品中应用，通过升级能够满足更高的技术要求。

Design of embeded images processing system oriented for asynchronous video

An oriented asynchronous video embedded image processing system based on DSP and FPGA is designed in this paper. The flexible architecture of the system avoids the requirement of dual-port RAM display memory for which the inter frame synchronization method is desired. This architecture can ensure the quality of output images and is convenient to im- prove the performance index of image processing, Taking FPGA as kernel, the system connects DSP and 4-chip frame memo- ry, and incorporates buffer and display memory by frame memory cycle reusing, which saves the process of data transmission. When frame frequencies of input video are less than those of output video, status transformation rules of frame memory are analyzed in term of overall system; as frame frequencies of output video are less than those of input video, status transforma- tion rules of frame memory are analyzed in term of single frame memory, and finally source codes is provided. This scheme has already applied to some products. The higher technology specifications can be met by upgrading.