China shenzhen Metal Dome camera manufacturer

Metal dome camera, metal casing camera, metal HD surveillance camera manufacturer, metal hemisphere surveillance camera manufacturer, Dragon's net metal camera With the development of society, the security industry has emerged more demand, especially in the video surveillance industry, along with networking And the digital tide, a lot of new technologies have emerged. In addition to the extremely popular "intelligent video analysis" technology in the past two years, the "megapixel HD camera" has gradually entered the security field. Everyone is paying attention to it. What new ideas, new applications and new values. 

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HD camera concept "HD", English is "HighDefinition", abbreviated as "HD". HD is actually the result of a combination of digital TV technology, advanced pixel and resolution technology and broadcast technology.

Ordinary analog TV relies on a continuous voltage with modulation to transmit images, while digital TV uses the same digital encoding as a computer to process images and sound. Make the image clearer and the color more vivid. However, to achieve high-definition digital TV, digital TVs not only need digital HD, but also rely on HD signal production technology and devices that transmit digital HD signals.

In the surveillance industry, there is a distinction between "standard definition" and "high definition". The dividing line between the two is megapixel or 720p, which is called megapixel or 720p.

HD can be divided into the following modes:

(1) 1080i format is a standard digital TV display mode. 1125 vertical scanning lines, 1080 visible vertical scanning lines, 16:9, resolution 1920×1080, interlaced/60Hz, horizontal frequency 33.75KHz.

(2) 720p format, which is a standard digital TV display mode. 750 vertical scanning lines, 720 visible vertical scanning lines, 16:9, resolution 1280×720, progressive/60Hz, line frequency 45KHz.

(3) 1080p format, which is a standard digital TV display mode. 1125 vertical scan lines, 1080 visible vertical scan lines, 16:9, resolution 1920×1080 progressive scan, professional format.

HD is more advantageous than standard definition. From the perspective of resolution, 720p resolution is 9 times CIF resolution, 1080i/1080p resolution is 20 times CIF resolution, in the same display environment, HD It will be much clearer. From the display effect, HD supports both large screen display and 16:9 widescreen display, which can greatly enhance the user's viewing experience. In terms of fluency, HD supports higher frame rates, such as 720p and 1080i/1080p, which can support 60 frames per second or 60 fields per second, and its image fluency is twice as high as that of standard definition. Therefore, high-definition surveillance is one of the most mainstream trends in the monitoring industry. mobile+86 13684959254