The technology commonly called HD CCTV implements SMPTE
HD-SDI standards from television broadcast technology and can transmit video at
720p or 1080p resolution over RG59 cable to a distance of at least 100 meters.
HD CCTV offers the benefit of providing high-resolution (megapixel) video, over
conventional analogue coaxial cables.
PROVISION-ISR HD CCTV cameras offer a standard resolution
of 1080P (1920 x 1080), equivalent to 2, 1 megapixels. 1080P provides over
24-times higher resolution compared with CIF and 6 time higher resolution than
D1.
While Analogue cameras continue to improve, it is still
subject to the limitations of the PAL/NTSC TV format, adopting a new HD
standard which enables the camera to push video resolution beyond 700TVL and
offering HD quality CCTV. HD CCTV is designed to be a drop-in replacement for
existing analogue CCTV, requiring only a change of camera and DVR. Both new and
existing installations can use CCTV industry standard coaxial cable (RG/59,
RG/6 and RG/11).
HD CCTV advantages
* HD CCTV is a digital transmission of uncompressed HD
video over coaxial cable.
* HD video: true 1080P or 720P HD video quality.
* Perfect clarity with no analogue noise.
* Uncompressed-nearly zero latency and no compression
artifacts.
* Coax cable: immune to network failure.
* Easy upgrade: using same infrastructure as analogue
system, just replace camera and DVR.
* Familiar user interface: for the installer/operator, no
difference between CCTV and HD CCTV except for higher resolution.
* Unified standards.
Provision DVR and cameras
Provision’s HD-SDI DVR, SA8800, was designed to provide
installers and customers with an easy entry point to the world of HD CCTV. It
provides, in one chassis, both D1 ports (four channels) and full HD 1080 ports
(four channels) allowing you to upgrade your traditional analogue CCTV system
to full HD at your convenience. Cameras monitoring a sensitive spot can be
replaced first while existing cameras will not require change or adjustment.
HD-SDI technology uses the same infrastructure as your
existing analogue installation, allowing you to replace your existing cameras
and DVR in very little time and with zero configurations.
Provision ISR HD DVRs are equipped with powerful CPU core
technology to enable processing of four real-time channels at full HD (1080P)
and four real-time channels at D1. Our DVR operates with H.264 main profile
compression format and advanced industry SOC techniques to ensure real-time recording
in each channel and outstanding stability of the system.
Provision’s ISR HD-SDI cameras implement the latest video
processing technology and provide advanced features: Digital image
balancing-delivering accurate picture in all light conditions, WDR
capabilities, privacy masking, image effects and more due to true day and night
functionality (ICR), DSS (Digital slow shutter), Advanced 3D-DNR (noise
reduction) and Smart IR technology (all cameras provide an excellent night
performance).
Benefits of HD cameras in different sectors
High-definition (HD) cameras are the best suited for
today’s video surveillance needs. That said, we must remember that all HD
cameras are megapixel (MP), but not all megapixel cameras are HD. The biggest
difference between a megapixel camera and the high-definition cameras is that
HD images use the 16:9 widescreen aspect ratio and megapixel produces images in
a 4:3 aspect ratio.
HDTV provides a higher resolution and higher resolution
translates into more detail, which in turn leads to better possibilities for
identification. In addition, a true HDTV network camera provides full frame
rate and extended colour fidelity, for an even better viewing experience.
To reiterate, all HD cameras are megapixel, but not all
megapixel cameras are HD, and good quality, easy installation, and ease of use
will set HD apart from standard analogue and MP systems.
Retail
In retail, theft and shrinkage can be drastically reduced
through effective video surveillance. HDTV network cameras have an important
role to play, for example by giving an overview – without any blind spots – of
shops and stores.
City surveillance
HDTV network cameras are typically used in city
surveillance situations to provide high-resolution video streams from locations
where there is a need to be able to clearly identify people and objects, or get
a larger overview.
High security premises
Casinos and airports, together with passport controls,
banks and similar high security premises, are areas where the requirements on the
surveillance cameras often include high image quality and detail as well as
full frame rate, making HDTV network cameras the natural choice.
Transportation
Security and safety for both passengers and staff are
highly prioritized issues for public transportation authorities around the
world. HDTV cameras at stations, terminals and airports as well as on-board
buses and trains, provide valid evidence in the event of criminal incidents.