基于DM368的视频捕获与编解码系统设计

Design of video capture and codec based on DM368

为了实现对视频进行捕获后压缩,文中提出一种基于DM368的视频捕获压缩方案,并设计完成相应的硬件与软件。该系统主要使用TI达芬奇DM368片上系统作为主控芯片,采用TVP5158作为视频采集前端。采用1G容量的DDR2内存作为易失性存储器。采用1GFlash作为系统内核与文件系统的存储介质。软件部分在Linux平台中使用达芬奇DVSDK进行编程。压缩规格上使用目前较为流行的MPEG4算法。从而实现视频的捕获与压缩。经实际测试显示,使用该平台进行视频捕获压缩开发较以往DSP和FPGA方案更加成熟稳定,并可以通过TI的开发工具和现有软件库大大减少开发周期。

In order to achieve the capture and codec of video, a design based on DM368 is described with its both hardware and software. In this design, DM368 from TI Davinci is the main control and process unit. TVP5158 is added to capture the analog video signal. A DDR2 with volume of 1GB is used as RAM of this system. Besides a Flash from SAMSUNG with volume of 1GB is worked as the memory to store the kernel and file system of Linux. The software is developed on Linux with DVSDK from Davinci.MPEG-4 is chosen as the standard of video compression. By real test, this platform can perform MPEG-4 much better than the platform with DSP and FPGA. This design is much mature and reliable. With the help from the tools of TI and all the algorithm library people could develop the software much faster.