基于DM6467的视频采集系统设计
本文首先介绍了嵌入式系统的发展状况和趋势，以及对DaVinci技术的简介，然后对本文所用的核心处理板进行了进一步介绍。着重介绍了核心芯片DM6467的功能和性能；并介绍了视频解码芯片TVP5158，详细说明了其在视频采集时的多种工作模式以及相关的注意事项。然后，阐述了在视频处理过程中，采集、显示、字符叠加和中心十字架程序的开发过程，然后通过在PC机上进行编译，并通过处理器成功实现了视频采集和显示。最后，对本文所做的研究进行了总结，说明了所做的工作，同时提出了不足之处。19409
关键词 视频采集 DM6467 TVP5158 达芬奇技术
毕业设计说明书（论文）外文摘要
Title the design of video capture system based on DM6467 development board
Abstract
With the progerss of Internet, communication and electronics technology,video capture technology has been developing rapdily.Embedded chip has a strong advantage in terms of video capture.And the Davinci processor with the dual-core architecture that TI company introduces,based on the embedded system,is an ideal platform for the realization of video capture.
This paper first introduces the developement and trends about the embedded system,and has a brief introduction of DaVinci tecnology,and then focuses on the core processing board:first,introduce the core chip DM6467,and make a detailed presentation on its function and performance;then have a explanation on the TVP5158 video decoder chip,and focuses on its precautions in different operating mode.which has a detailed introductiong of its function and performance.Next I elaborate the development process of capture,display,OSD,the center cross program in the video processing,then comlile it on the PC and successfully achieve the video capture and display with the processor.At last,I sum up the research done on this article,and explain the work I do.At the same time , I proposed the inadequacies on this paper.
Keywords video capture DM6467 TVP5158 DaVinci tecnology
目次
1 绪论 4
1．1 嵌入式系统介绍 4
1.1.1 嵌入式系统的发展历史 5
1.1.2 嵌入式系统的结构 5
1.1.3 嵌入式系统的发展趋势 6
1．2 Davinci技术简介 7
1．3 论文研究背景 7
1．4 本文主要研究内容 8
2 系统硬件平台 9
2.1 图像处理板的总体介绍 9
2.2 TMS320DM6467处理器 10
2.2.1 TMS320DM6467的主要结构 10
2.2.2 VPIF模块简介 12
2.3 TVP5158视频解码芯片 14
3 采集处理和显示程序的开发 18
3.1 Linux系统的搭建 18
3.2 采集和处理程序的开发 18
3.2.1 采集线程（Capture.c） 19
3.2.2 编码线程（Encode.c） 21
3.2.3 显示线程（Display.c） 22
3.2.4 字符叠加与中心十字瞄准线的实现 23