1, the camera determines the clarity of the picture we see in real time on the monitor or display when we are monitoring in real time.
2. The video recorder determines the clarity of video playback.
3. This is why the same video recorder (DVR), some cheap, some expensive, H.264 compression format is the same, but some video recorders see CIF format video when playing back, and some video recorders see D 1 format video.
4. The current network hard disk video recorder (NVR) can support 720P and 1080P HD video playback.
A typical TV monitoring system is mainly composed of front-end equipment and back-end equipment. The front-end equipment usually consists of camera, manual or electric lens, pan/tilt, protective cover, listener, alarm detector and multifunctional decoder. They perform their respective duties and establish corresponding connections with various devices of the central control system through wired, wireless or optical fiber transmission media (transmitting video/audio signals and control and alarm signals). In the actual TV monitoring system, these front-end devices are not necessarily used at the same time, but it is essential to realize the camera and lens for monitoring the scene image acquisition. Back-end devices can be further divided into central control devices and sub-control devices.