From the application diagram see, RX chip and existing analog video DVR used exactly the same AD chip interface,
so the whole program can be seamlessly traditional analog DVR. Built-in equalizer allows DVR client can receive
500 meters long distance transmission of high-definition video signals.
So the release of the TX and RX chip allows machine manufacturers make very small changes in the original
camera and DVR solutions can be achieved HDCVI program will accelerate the popularity of high-definition video
surveillance.
HDCVI advantage
According to the technical characteristics and performance HDCVI, the contrast HD-SDI technology, HDCVI in the
field of high-definition video coaxial cable transmission is very competitive. First, HDCVI with two HD-SDI
transmission technology can transmit the effective resolution of 720P and 1080P HD video, but the transmission
distance HDCVI have a clear natural advantage. HD-SDI transmission currently only 100 meters in the transmission
medium better environment. HDCVI currently 75-3 in the use of cables that can transmit at least 500 meters, and
the low signal distortion; 75-5 or better when using a cable, transmission distance can be further extended up, but
also to ensure the transmission of video quality.
Second, HD-SDI anti-interference ability is poor, especially in the presence of high frequency radiation
environments, such as mobile phones, wireless routers. Strong high-frequency electromagnetic radiation
interference on wireless HD-SDI, resulting video data error rate appears high, the performance of image
abnormalities, video, and so can not be locked. HDCVI low frequency analog modulation technology, from the
nature of the technical principles of avoiding the interference of high frequency wireless electromagnetic radiation,
even under strong interference source environment, HDCVI still able to guarantee high-quality image
transmission.
Third, HD-SDI in the actual construction, environmental choice for wiring, construction methods have strict
requirements, mainly for the installation of high quality for cable requirements; allowed to connect midway
requirements; welding quality requirements of connecting terminals ; installation path low radiation requirements.
These are the construction quality of personnel, construction costs, installation and maintenance complexity, line
alignment design high demands. HDCVI technology followed analog SD and traces of construction requirements
specification, general weak construction personnel can quickly deploy high-definition monitor subsystem.
HDCVI with mainstream network HD camera comparison , HDCVI also showed the advantages of the security
industry applications. First HDCVI using point to point transmission , ensure the reliability of signal transmission.
IPNC using Ethernet transmission technology , the transmission path through the network routing, switching , etc.,
the presence of network jitter , packet loss and other risks. In order to adapt to the network environment to
ensure fluency of video , often taking video buffering technology , the current network environment is better able
to guarantee the control transfer point within 300ms, the poor in the network environment , the delay
phenomenon is more serious. HDCVI technical point there is no delay in the transmission process , high-definition
video sources from the camera to the back-end process equipment without codec preview image remain
completely original effect, providing the user a more perfect visual effect. Second , the current upgrading of
analog SD devices can seamlessly switch to HDCVI product demand can be achieved by replacing the full
high-definition surveillance cameras and DVR. Construction, deployment analog SD equipment is the most widely
used is the engineering, construction workers currently in the security construction was mainly used in the system ,
HDCVI technology followed analog SD transmission, in the construction and deployment of the easiest times the