HDCVI,
i.e. High definition composite video interface is a solution for megapixel high
definition applications that features non-latent long distance transmission and
that too at a lower cost. The name is so as it depends on the baseband and quadrature amplitude modulation
technology, which can avoid the CVBS crosstalk, completely disintegrates and
separates the brightness and hue signal, which further enhances the video
quality.
The
HDCVI solution can incorporate both coaxial
security cameras and DVRs. If you
wish to Buy Coaxial Security Cameras,
then look at the system in star topology structures with DVR that serves as a
node for over coax P2P transmission to the camera. There are two specifications
of this technology, i.e. 1080p and 720p. In addition,
there is a feature of Auto Signal Compensation (ASC) which allows extremely low
signal distortion along the long transmissions.
The long-distance transmission is said when the
data is transmitted over 500m through use of a coaxial cable that too depends on the cable selected. The Coaxial
Security Cameras Suppliers provide
cable 75-3 and 75-5 that is also recommended for transmission within 500m,
whereas cable 75-5 is recommended for above 500m.
In
one single coaxial cable, 3 signals can be transmitted. HDCVI
composites video, audio, and control signals together and then through only one
coaxial cable, it is transmitted with
simplifying the installation of Surveillance
Client Software.
Further,
for multiple multiple-signal transmission over one cable, both audio, as well
as dual way data communication signals are embedded in blanking zone. This will
enhance the synchronization with the video
signal and supports a sampling rate of maximum 44.1 KHz.
The coaxial
security camera manufacturer also provides information about the data
channels being both forward and reverse in the frame blanking zone, with two
way end-to-end transmission which supports the control commands like camera
focus, real-time alarm, PTZ control, etc.
The forward output data supports high transmission baud rate as sending time,
and the electric signal baud rate is
predictable.
On the other hand,
the Coaxial
Security Camera Company also report that reverse output data
supports a lower baud rate which is due to the low frequency and limited data
which is affected by impedance matching as well as channel transmission
uncertainty. Thus by adopting the ASC, the reverse channel will be able to
restore some degree of the electrical
signal during the long-distance
transmission.
Therefore, in
summary, HD-CVI not only provides a good solution that offers megapixel image
quality over long-distance transmission
but also ease of installation.
