基于DM368视频采集的数据流同步传输  

Data Flow Synchronous Transmission of Video Capture Based on DM368

作　　者：李明磊[1] 唐小琦[1] 宋宝[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《电视技术》2014年第7期62-64,68,共4页Video Engineering

基　　金：高等学校博士学科点专项科研基金项目(新教师基金课题)(20090142120035);广东省部产学研重大项目(2012A090300012)

摘　　要：视频采集中经常会碰到视频卡顿不流畅的现象。一个基于网络的完整视频采集系统一般包含图像数据的采集、图像大小调整、自动曝光和白平衡控制、压缩编码和流化等模块。基于DM368处理器实现了一个视频采集系统,重点讨论了各个模块间的数据同步问题。利用完成量机制,通过合理的调度模块间的缓存,实现数据流的同步传输,各个模块间帧率保持同步。测试结果显示该视频采集系统图像连续,无掉帧丢帧现象,图像色彩还原性好且清晰,系统运行稳定。A video capture system often encounters the problem of lacking smoothness of video. A video capture system is usually composed of the im- age capture, image resizing, auto exposure, auto white balance, video compression and encoder, video stream and other modules. In this paper, the problem of data synchronization between these module is addressed based on complementing a video capture system. Utilizing the completion mechanism, the synchronized transmission of the data flow is implemented through reasonably scheduling the buffer between different modules. The test result mani- fests that the video acquired by this system runs fluently, and has high resolution and fine color reducibility, and the system runs stably.

关 键 词：DM368 视频采集 视频数据流 完成量 

分 类 号：TN919.8[电子电信—通信与信息系统]