Technical advantages of IP camera from the defect of security engineering

In recent years, security application is comprehensive rise, video monitoring the mainstream. In a large number of security application, using the CCD camera models. The so-called CCD camera, which takes CCD as the sensor, acquisition and digital image signal, some image processing in DSP chip dedicated after, encoded into CVBS analog signal transmission, CVBS composite video signal, transmitted via coaxial cable, the back-end DVR products through the video decoder (VideoDecoder), digital conversion of the analog video, comb filtering (luminance chrominance separation) operation, encoded into digital signal processing and output.

The digital to analog, from analog to digital convert back and forth, and has brought many problems, some defects in security engineering that is derived from this model, the main problems are: the image module, digital to analog conversion, image quality is impaired; analog signal long distance transmission, signal attenuation, interference, poor image quality; fixed image resolution is PAL or NTSC, can not meet the higher definition, monitoring the demand for higher resolution; video signal dynamic range is small, difficult to meet the various needs of the specific application, such as low noise, wide dynamic range, high frame rate requirements; unable to realize the distribution, long distance transmission, sharing demand.

The IP camera is adopted a comprehensive digital processing technology, the video signal from the CCD or CMOS sensor acquisition and digitization, subsequent processing with digital signal, and the video signal network transmission of various specifications, the processing technology of all digital has the following advantages:

1 all digital processing technology not due back and forth between analog and digital conversion loss of image quality;

2 the transmission of digital video digital interface, will not bring the interference and fading, no matter how far the distance, will be able to image quality has remained stable;

3 digital video is far greater than the analog video, can realize video image high resolution, high frame rate, wide dynamic range;

4 intelligent image processing and recognition technology can be extended to the front directly;

Video processing technology 5 wide dynamic range for various occasions, video surveillance camera product customization development;

6 high definition IP camera can realize PTZ function, can satisfy a wide range of site monitoring;

7 can provide high quality, high bandwidth, low latency preview video stream and used for video streaming video, ensure clarity, easy storage characteristics;

The 8 wiring in the building intelligent system, without the need of the transformation of wiring, as long as the network is ready for deployment of the network monitoring system, video transmission and control can be carried out by a variety of wireless, wired network;

9 built-in storage devices such as hard disk, SD card, small, in the network fault, can save key video image to the local storage.

As can be seen above, IP camera, the simulation of various defects camera were very good to make up for it in all aspects of the indicators for improved, compared with analog cameras, IP cameras integrated information processing technology more, closer to the needs of users. In the cost aspect, IP camera chip can complete analog camera original functions, provide Bayer interface for CCD, not in terms of cost have the obvious promotion.