针对高清视频压缩的自适应预处理系统设计与实现

受限于达芬奇数字信号处理器DM6467只能接收固定的视频格式,设计并完成了一种基于FPGA结合DM6467的视频压缩自适应预处理系统.该系统可根据输入的视频图像自适应地完成输入视频分辨率的检测与采集,并将RGB格式视频转换为芯片可直接使用的YUV色度空间,完成对色度空间下采样.然后利用分帧传输技术将图像分成各个子帧,并对各子帧进行RAW格式组帧.最后将重组数据传输至DM6467中编码.实验结果表明该系统可对任意格式、分辨率的视频进行采集与编码,且采用的分帧传输方式极大地降低了图像采集延时.

Design and Realization of the Adaptive Preprocess System for Compress HD Video

As limited fixed-format of the video encoding for the digital signal processor of the DM6467 which is the DaVinci platform, adaptive preprocessing system of the video compression has been designed and realized, which system based on the FPGA and DM6467. This system detected adaptively resolution of the input video according to the input image, sampling the input image, converting the format of the RGB to the YUV chromatically space, which can directly used by the chip, and down-sampling the chromatically space. Then image is divided into various sub-frames by then technology of the sub-frame transmission, and each sub-frame has been restructured to the format of the raw. Lastly, the data of the format of the raw transmits to the DSP coding. Experimental results show that this system has ability of the sampling and coding to any format video, and greatly reduces the time delay of the image sampling as used of e sub-frame transmission.