HDcctvNetwork HD surveillance has its benefits,but require compression to keepbandwidth manageable. Depending on network traffic, IP video may have significant image lag, dropped frames and loss of detail after it is compressed.HDcctv uses the HD-SDI broadcast
standard to send uncompressed video over coaxial cables, with virtually no delay.
The original HD stream is preserved,resulting in real-time transmission and improved image quality. An HDcctv system is also more reliable than a network system.
An HDcctv video surveillance system uses existing coaxial cabling, so users only need to change their cameras,DVRs and other hardware. It is easier and cheaper to use HDcctv equipment,compared to buying completely new network surveillance devices. Installers
and end users do not need to learn about complex IP networks, as HDcctv uses the same settings and operations as analog systems, reducing additional training costs.
While network surveillance solutions offer flexibility, they cannot meet real-time demands for mission-critical applications.Image delay, the possibility of remote hacks into the network and network downtime are not acceptable at banks,hospitals, prisons and museums. HDcctv systems without image delay can solve real-time streaming problems. Operators can monitor and view scenes live. They can track motion with high-speed domes,
to pinpoint the exact location of events.
Dahua has launched several HD-SDI cameras and DVRs. The HDC-HF3211 uses a 2-megapixel Kodak CCD sensor and supports 1,080P at 20/30 fps.Another model, the HDC-HF3300, uses a
3-megapixel Sony Exmor CMOS and also supports 1,080P at 20/30 fps.
The VEC8004HD is a four-channel realtime HD-SDI Compression Card, which supports one 1,080P HDMI output. The HD-SDI DVR (DVR0404HD-U) features four-channel support for full HD 1,080P images, as well as four channels of 1,080P real-time viewing and simultaneous
playback.