HD-TVI, HD-CVI, HD-SDI, AHD, Analog &
IP Camera
Even we enter into digital
era, analog surveillance technology doesn't stop its innovation. Besides the
HD-SDI and HD-CVI (in house technology of Dahua), today the Hikvision and other
camera manufacturers announce HD-TVI cameras release. HD-TVI means High Definition Transport Video Interface, HD-TVI
is based on traditional coaxial cable for video and data transmission, it
supports not only 720P/1080P video signal, but also including audio, data
signal over long distance up to 500 meters.
At present, there are
approximate 100 million coaxial cables are deployed for analog camera
connection. In the next 3-5 years, they will be replaced with high definition
camera. However, some users start to worry they have to rewire, re-install or
add new network devices for upgrading. This group of users prefer the
economical and easy solution to upgrade existing system to HD, rather than
adopting the IP camera. In this context, the HD-SDI and HD-TVI technologies
were born.
HD-TVI advantages
500 meters long range video transmission:-
As we know, HD-SDI and
conventional analog solutions only has limited 100 meters video transmission.
Additionally, the cost of HD-SDI equipment is more expensive. The HDTVI
technology (HikVision) offers long range distance video transmission at
1080P/720P through coaxial cable. The cost of HD-TVI products is very
affordable, permit users upgrade the system with minimum investment. This makes
HDTVI become a perfect solution to fit all analog surveillance applications.
Furthermore, the new HDTVI technology support UTC function which
can allow user to remotely control the OSD menu and PTZ control via coaxial
cable. This means user can quickly install and adjust the camera without
accessing the camera itself.
 |
| HDTVI Camera with CS 4mm lens |
Analog high definition resolution at 720P/1080P:-
Similar to HD-CVI (in
house technology from Dahua) and HD-SDI, the new HDTVI cameras can deliver real
time 720P/1080P HD resolution video without video latency. The HDTVI DVRs
support full time 720P/180P video recording and playback. Through using HDTVI
compatible cameras and DVRs, user can setup a complete new HD analog
surveillance system or easily upgrade the existing conventional analog system
to HD surveillance system.
 |
| HDTVI Camera with CS 12mm lens, |
Broad manufacturers to offer great compatibility:-
HDTVI equipment is HDTVI
open standard, which guarantees trouble-free connection to other
HDTVI-compliant cameras and DVRs. By the way, the new designed HDTVI DVR also can support traditional standard video
camera for offering great flexibility. All HDTVI HD cameras can access
third party DVRs equipped with HDTVI technology from other manufacturers. The
main HDTVI members including TVT, Hikvision, Hisharp, Unifore, LSVT...etc.
HD-TVI vs Analog
In summary, the advantage
of HD-TVI compared with Analogue is:
1.
HD resolution on
720P/1080P at 25/30fps
2.
Long distance
transmission for HD video
3.
No video quality
loss and delay for transmission
HD-TVI vs HD-CVI
Obviously, HD-TVI and
HD-CVI have very similar features, both of them can provide analog high
definition solutions. HD-TVI derives from American based company that does not
supply to only one manufacturer. Therefore we are expecting many analog camera
manufacturers will release wide range of HD-TVI based cameras to market.
Therefore, HD-TVI is more likely to become an industry standard, not a
proprietary technology/solution.
HD-SDI vs HD-CVI
HD-TVI vs HD-SDI
In conclusion, compared
with HD-SDI, new HD solution with advantages of:
1.
Longer video
transmission distance up to 1000ft (300m) over regular coaxial cable
2.
700ft (200m)
distance for video transmission over UTP (Cat5, twisted cable)
3.
More cheaper
price for analog HD system
4.
Support twisted
cable installation
HD-TVI vs IP Camera
Hence, compared with IPC,
the advantages of HD-TVI are
1.
No network
bandwidth requirement/influence
2.
No network
configuration, as easy as analog system
3.
No video quality
loss and compression
4.
No video latency
issue, real time live-view
5.
Long video transmission
distance
6.
More affordable
price for camera and video storage devices
AHD advantages
A new kind of camera: AHD
Camera (Analog high definition)/HD-AHD is developing so soon in the market now.
The price is similar as Analog camera and the image effect is similar as digital camera!
The price is similar as Analog camera and the image effect is similar as digital camera!
The Advantages of AHD Camera:
1) AHD Camera can link with general DVR and the resolution is looks like 1000tvl analog cameras.
2) AHD Camera can link with AHD DVR, and the resolution is Megapixel High Definition ( Now have 1MP, 1.3MP already).
3) Transmit by Coaxial cable-500m!!
4) The price is similar as Analog system no matter considering DVR or camera.
1) AHD Camera can link with general DVR and the resolution is looks like 1000tvl analog cameras.
2) AHD Camera can link with AHD DVR, and the resolution is Megapixel High Definition ( Now have 1MP, 1.3MP already).
3) Transmit by Coaxial cable-500m!!
4) The price is similar as Analog system no matter considering DVR or camera.
HD-CVI cameras vs HD-AHD cameras
1.
1.0 megapixel AHD
camera adopts OV9712 + NVP2431H solution (CMOS Chip: OV9712 & DSP
Chips : Nextchip NVP2431H), while HD-CVI camera adopts the PO3100K +
DH9801 solution. In addition to the difference of solution, the price vary
greatly, OV9712 + NVP2431 of AHD camera module only costs US$7.5, and PO3100K +
DH9801 camera module costs approximate US$11.
2.
AHD camera can
connect to CRT display directly, the image can display properly. HD-CVI camera
connects to traditional CRT, it doesn't show images. For video live
view/recording/playback, HD-CVI cameras need to work with HD-CVI DVR. It seems,
the HD-AHD cameras support 960H output mode, which is very convenient for test
and installation. Since the AHD cameras can be backward compatible with all
traditional analog equipment. Compared with HD-CVI, it has advantages of great
compatibility.
3.
Competiable
with normal D1 / 960H, and analog peripherals (including distributors,
matrix, etc.). Switch AHD, IP and
Anolog video signal from AHD DVR in no time.
4.
Strong
anti-interference capability & solid interface protection that can avoid
space high frequency electromagnetic radiation to ensure a constant signal
transmission of high definition video display without problems as frame drop
and lock loss occurred.