HD interpretation of monitoring the mainstream of the times

HD interpretation of monitoring the mainstream of the times
HD IP Camera is the first theme of today's video surveillance. The one hand, the rapid development of electronic, network technology greatly enhance the value and scope of application; On the other hand, the rapid expansion of the global security needs as well as users increasingly high requirements also greatly stimulated the development of the network camera.
IP camera, network cameras, also known as the name implies, this type of camera can image transmitted through the network to the other end, and distant surfers simply using a web browser to monitor the image. This is a traditional camera and network technology combined with a new generation of cameras.
But not be able to connect to the Internet is a network camera. Network cameras can be divided into two categories, one is the front-end based CCTV analog cameras with video processing and network transmission module is a combination of mixed analog-digital network cameras; pure digital network camera. Both fundamental difference is that the former is essentially still analog camera, its mechanism is A / D-D / A-A / D, after the two analog-to-digital conversion, and ultimately the formation of the network signal, the highest quality can not exceed D1. The realization of the latter mechanism is the analog signal from the A / D signal to the network, thereby greatly improving the conversion efficiency, and thus greatly improve the quality reduction due to the improvement of the quality of the snow noise, so even though the pixels high, but occupy a code flow but little better applicability of its network. Because of the superiority of pure digital network cameras, the analog IP Camera will be phased out in the market.
As people gradually increase the monitoring requirements, in the era of digital surveillance network camera toward the direction of the high-definition, smart development, to become IP Camera trends in the technology sector.
In the era of analog control, the user fuzzy screen covered with snow noise already complain incessantly but can not do anything, because the market was the best camera can only do D1 pixels, in theory, only a maximum of more than 40 million. In the field of non-security, it is overwhelming digital camera, camcorder, PC camera, mobile phone camera, the hundreds of millions or even tens of millions of pixels. Surveillance cameras as a security assistant, analog class surveillance products can not meet user needs, then, "HD" has become the first demand, and, with the high-definition picture quality, low-light, wide dynamic, intelligent such as the higher level of demand can be achieved only with the application.
The high-definition screen is mainly dependent on technological breakthroughs, first proceed to improve the quality of the video source. Digital HD IP Camera relative to the analog cameras, progressive scan, commonly used CMOS sensor built-in AD converter, optical signal into a digital signal output, to avoid repeated AD conversion, damaged small quality and color reproduction, signal anti-interference performance.
Analog front of the camera light sensor output analog signals, followed by transforming into a digital signal, so that the color and luminance processing, digital signal can then be converted into an analog signal output. When you reach the back-end equipment such as DVR, video capture chip (such as: 7130,6805) analog signal into a digital signal, a total of 3 times the AD conversion, the picture is severely damaged when the composite video transmission to the video capture chip , the video capture chip in addition to doing the AD conversion, we need to do bright separation (dressing filtering), because it is difficult to completely separates the luminance and color signals, resulting in traditional analog video surveillance prone color penetration and variegated phenomenon.
From: http://www.vstarcam.com/channel/HD-interpretation-of-monitoring-the-mainstream-of-the-times-125.html