面向压缩的高分辨率视频采集预处理

随着人们对视频分辨率的要求越来越高，需要采集、压缩的数据量也越来越大，因而需要在视频数据采集时作一定预处理，减轻数字信号处理器DSP的负担，以便实时地压缩视频数据．而如何转换视频数据格式、提高DSP读取数据的速度、减少DSP与存储器的交换次数，成为视频数据采集预处理部分要解决的关键问题．提出了三种以高性能、高集成度现场可编程器件(FPGA)为核心控制部件，并配以同步或异步存储芯片来完成视频数据采集预处理的方案，它们都不同程度地提高了压缩系统的性能，其中处理高分辨率图像压缩时，FPGA FIF0 SRAM采集方案效果最佳．

Pre-Processing for High Resolution Video Acquisition in Compression

As people wish to get higher and higher resolution of video, the amount of data needs to be acquired and processed is ever increasing. Therefore, data acquisition pre-processing is required to lighten the burden of digital signal processor (DSP), so as to achieve real-time data compression in the end. In this circumstance, how to convert the raw video data into special format data, how to accelerate the speed of accessing video data and how to reduce the frequency of data exchanging between DSP and external memory chips have become key problems that should be solved by video data acquisition and processing system. This paper proposes three kinds of solutions to implement data acquisition pre-processing. In the solutions, we use field programmable gate array (FPGA) featured by high performance and high integration as the core part, whereas synchronization or asynchronous memory chip as subsidiary. While each of the three solutions can improve the performance of compression system to some extent, FPGA FIFO SRAM solution performs best in compressing high-resolution video.