基于IA6459的视频字符叠加系统的设计  

Design of a Displaying Video and Character System Based on OSD IA6459

作　　者：闫露露[1] 郑恩让[1] 

机构地区：[1]陕西科技大学电气与信息工程学院,西安710021

出　　处：《电子器件》2014年第1期108-112,共5页Chinese Journal of Electron Devices

基　　金：陕西科技大学研究生教改;创新项目

摘　　要：随着在屏显示技术的广泛应用,OSD设备倍受青睐。设计了一种以DSP5509为核心,通过串口与下位机的通信,基于专用OSD(On Screen Display)芯片IA6459的视频字符叠加系统。系统主要由控制,视频字符叠加和上位机通信3部分组成。控制部分以DSP5509为核心组成,视频字符叠加部分以IA6459为核心组成,上位机通信部分使用Vb编写可视化用户界面。经过实际系统验证,可以无损的在视频上叠加所需字符。With the wide use of the on screen display technology,OSD equipments are welcomed by many users. A displaying vedio and character system was designed. Based on DSP5509 as a cover, communicating with lower computer through the serial ports, and using the dedicated chip IA6459, a display controller was proposed for displaying texts and graphics on the TV screen. The system made of control circuit,overlay circuit between video and character and upper communication circuit. Control circuit contains DSP5509,upper computer communication circuit includes visual user interface compiled by Visual Basic. The interface circuit between IA6459 and DSP5509 is given. In the end,the system can superpose the desired characters on the video.

关 键 词：视频字符叠加 IA6459 DSP5509 上位机 

分 类 号：TN873[电子电信—信息与通信工程]