(It is composed of coders and other components, which perform their respective functions and establish corresponding contacts with various equipment of the central control system through wired, wireless or optical transmission media (transmission of video / audio signals and control and alarm signals). In the actual TV monitoring system, these front-end devices may not be used at the same time, but it is essential to realize the camera and lens for monitoring the scene image acquisition. 2.1 the camera is the front-end equipment to obtain the monitored field image. It takes the area array CCD image sensor as the core component, plus the synchronous signal generation circuit, video signal processing circuit and power supply. In recent years, new low-cost MOS image sensors have developed rapidly. Cameras based on MOS image sensors have been used in videophone or videoconference systems that do not require high image quality. As the resolution and low illumination of MOS image sensor can not compare with CCD image sensor for the time being, the camera used in TV monitoring system is still CCD camera. Cameras can be divided into black-and-white cameras and color cameras. Because black-and-white cameras have the advantages of high resolution and low illumination, especially they can image under infrared light, in the television monitoring system, black-and-white CCD cameras still have the following attachments:
Teaching materials of TV monitoring system doc
CCB remote monitoring system scheme doc
TV monitoring system textbook)
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