一种带有外同步输入的视频发生器模块的设计  

Design of Video Generator Module with External Synchronization

作　　者：王瑞荣[1] 赵永平[2] 

机构地区：[1]杭州电子工业学院自动化分院,浙江杭州310018 [2]哈尔滨工业大学自动化测量与控制系,辽宁哈尔滨150001

出　　处：《计算机测量与控制》2005年第1期82-85,共4页Computer Measurement &Control

基　　金：国家"九五"重点科技攻关项目"虚拟仪器软件结构与接口技术的研究"(97-772-01-06)

摘　　要：阐述了一种主要用于检测视频同步信号的基于PCI总线的视频发生器模块的设计过程。该模块具有RS-422总线接口与两路PAL制式复合视频输出端。该视频信号可以由外部行场同步与外部复合同步来同步,也可以由内部时钟生成的内同步信号同步。视频图象数据由板上的存储器存储,并可以通过接口改写。本硬件电路板还可以通过PC机对同步的选择与图象的发送进行控制,并具有故障检测的功能。其中的视频同步信号生成电路以及视频图像数据地址生成电路采用了PLD器件,这样就可以很方便地去改变视频制式,也便于调试。A kind of PCI-based TV video generator is presented, which can be used to test the video synchronization from outside. This module has a RS-422 interface and two standard PAL TV video output channel. This video signal not only can be synchronized by outside synchronal signal but also can be synchronized by inner synchronal signal. The image data in the memory can be rewritten through the interface circuit. The selection of the synchronal mode and the transmission of the video can be controlled by PC. The module also has the function of failure detected. A PLD is used to produce the video synchronization signal and the logical address of the video image. So it is very convenient to change the forms of the video and easy to debug !

关 键 词：电视信号处理 视频信号 视频发生器模块 PCI总线 设计 

分 类 号：TN941.1[电子电信—信号与信息处理]