摘要
介绍一种在脱机态能够输出3种格式的视频图像采集板的设计方法,将CCD摄像头输出的视频信号解码成数字分量信号格式,然后在控制电路的控制下,输出标准的CIF,QCIF,SQCIF3种图像格式之一,并存入帧存储器。计算机模拟和示波器测试表明该设计准确有效。该图像采集板可用于可视电话系统的前端采集部分,也可根据所需图像质量选择3种图像格式之一用于监控系统。
In this paper,a method was proposed for researching the video image capturing board,with the output in one of three image formats.The process is as following:the active image obtained by CCD camera can be decoded,and be changed into data stream,then through controlling the control circuit,the data stream can be stored in to frame memory respectively.Computer simulation proves that the design is efficient.The image capturing board can be used in video phone system to capture image,and can also be used in supervision sys-tem according to image quality to select one kind of the image formats.[
出处
《电视技术》
北大核心
2002年第8期84-86,共3页
Video Engineering
