Four differences between HD cameras and traditional cameras

For HD cameras and traditional cameras, there are still some differences. Compared with traditional monitoring devices, HD cameras surpass traditional analog cameras in all aspects. Traditional analog cameras have been developed to the present, and it can be said that they have reached the maximum. If you want to further develop, then you need to break through its own bottleneck, but HD products overcome the bottleneck faced by traditional cameras with its outstanding features. The four points difference between HD cameras and traditional cameras, the specific differences are as follows:

First, the traditional camera has a low rate of sub-listing, while the digital camera uses digital signal transmission, which converts the optical signal into a digital signal, and then the image is compressed and processed by the DSP. Finally, the digital compressed video is output through the network, and the digital camera is resistant. Electromagnetic interference, progressive scan, and screen resolution all have advantages that traditional analog cameras cannot match.

Second, the image scanning mode of the digital high-definition camera is progressive scanning, and each frame of image is continuously scanned by electron beam sequentially one by one and one row. The scanning mode of the conventional analog camera uses interlaced scanning, and the line scanning frequency of the interlaced scanning is half of that of the progressive scanning. Interlaced scanning, due to its working principle, has many shortcomings in the application, such as the occurrence of inter-row flickering effects, parallel phenomena or vertical edge aliasing, resulting in reduced overall motion picture clarity.

Third, the color of the digital high-definition camera is more realistic than that of the analog camera. The luminance signal and the chrominance signal in the analog video signal occupy the same frequency band, and it is difficult to perform comb filtering (light color separation) by the video capture chip. The chromaticity and brightness signals are completely separated, resulting in faint spots and color penetration on the screen, while the digital HD camera does not have this trouble, the color is more realistic, more layered, and the picture saturation is better.

Fourth, analog cameras need to route control lines, video lines, audio lines, and power lines in an independent form. The wiring is very cumbersome and complicated, and the workload is large, and the overall wiring cost is high. There are many in engineering applications. Limitations, but the wiring of HD cameras is much more convenient.