What is HDCVI?
Analog HD transmission interface technology HDCVI. HDCVI HD video transmission technology is a method already
SYV75-3 or SYV75-5 coaxial cable based, to achieve reliable transmission of video signals over long distances at
high cost and low quality of the coaxial cable. Compared to the HD-SDI subsystem demanding practical
applications of the transmission medium, HDCVI distances can be adapted, at low cost transmission media and
complex deployment scenarios.
HDCVI adopt in terms of modulation and quadrature amplitude modulation baseband modulation technique
modulated analog video signals to be transmitted again, hence the name HDCVI, namely high-definition
composite video interfaces. This technique avoids the CVBS chrominance crosstalk phenomenon, the luminance
and chrominance signals are completely separated, to further improve the picture quality.
HDCVI including 1920H and 1280H two norms, standards-compliant 1080P and 720P resolution, and automatic
signal compensation using targeted patented technology to ensure minimal signal distortion under the
long-distance transmission. HDCVI technology also uses analog cameras plus DVR systems portfolio to DVR device
as a node, with the camera uses a star topology to deploy between camera and DVR using coaxial cable point
transmission. According to the transmission cable in less than 500 meters from point to point transmission, etc.
can be used 75-3,75-5 coaxial cable transmission, transmission distance of over 500 meters using a coaxial cable
transmission 75-5 level above. Midway point of the transmission cable connector can be used or welded
connections. The actual construction phase, exactly the same installation, cabling, wiring products and
construction HDCVI analog SD products, no special requirements of its construction in the outdoors, indoors, on
the outside there is a strong anti-jamming capability.
In order to achieve multi-signal transmission cables, HDCVI in blanking embedded audio signal simultaneously
with the two-way data communication signals. Composite audio signal in the line blanking in order to increase the
synchronization of the video signal, and through automatic compensation technology, the highest support for
44.1kHz sample rates. Forward and reverse data channel complex in the vertical blanking, the two-way
transmission control commands through the control signal, the transmission of information between the receiver
and transmitter, supports such as cameras zoom, pan rotation, real-time alarm. Since forward which sends data
transmission time and electrical baud predictable, and the receiving end with a high-performance automatic
compensation technology that can support a higher baud rate. Because of the reverse transmit data channel
transmission impedance matching and uncertainty factors, the lower the signal frequency and the amount of data
sent each time is limited, so the low baud rate support. Of course, the reverse channel is also used on automatic
compensation for long distance transmission of electrical signals some recovery.
So HDCVI is a low-cost, long-distance, without delay, high efficiency, and easy to implement interference level
megapixels HD video transmission technology
HDCVI achieve carrier - HDCVI chip
The launch of the chip-chip solution into sending (TX) and receiver chip (RX) two parts, used in the front-end and
back-end HD cameras HDCVI analog HDCVI analog HD DVR, can be extended to the middle of the Optical,
distributor and matrix and other equipment.