LAURENCE SMITH The Quasar 4k cameras are more affordable to install, maintain and more bandwidth efficient than HD cameras
The ultra-high-definition camera supplied by Graphic Image Technologies (GIT) provides better and higher-resolution coverage of areas than high-definition (HD) cameras, with one camera also able to replace two or three HD cameras, reducing costs, says GIT executive Laurence Smith.
The DVtel Quasar 4k cameras provide users with digital video feeds and an analogue feed that can be sent over low-bandwidth connections. The full-resolution videos are stored on the camera or network video recorder (NVR) systems and can also be stored remotely.
Further, the feeds from the videos can be divided into multiple streams, though the frame per second (fps) for each stream is lower than the full 30 fps of a single ultra-HD stream at a maximum of 12 fps per stream.
The video feeds also adapt to the resolution of the monitor they are displayed on, enabling the bandwidth of video feeds to be used efficiently.
“However, one of the most significant benefits of the systems is that, even on lower resolution feeds, when a user zooms into a portion of the video feed, the resolution will scale to the maximum resolution available for the image, improving the detail that the operator is viewing while using the same bandwidth.”
Further, these cameras have wide dynamic range technology, which enables them to capture bright and dark areas simultaneously and then display them together to provide users with finer detail in these areas.
The use of P-iris lens technology, which manipulates the aperture to enable near and distant objects to remain in focus and overlays the objects into a single video stream, augments this capability.
“The Quasar 4k cameras can replace two to three normal HD cameras (which have a resolution of 1 080 pixels horizontally), making them more affordable to install and maintain, and more bandwidth efficient,” says Smith.
The Dvtel Quasar cameras are available with 3.5 mm to 8 mm and 9 mm to 22 mm multifocal lenses, and with two form factors – a vandalism- resistant indoor/outdoor dome and a vandalism- resistant bullet indoor/outdoor camera. The cameras conform to IP 66 standards governing dustproofing and water resistance.
The cameras can draw power using an Ethernet connection, which means that an uninterrupted power supply system linked to the hub controlling the cameras can provide power during an outage. The cameras can also be powered by standard 12 V dc or 24 V ac power packs.
Further, the DVtel range includes three NVR platforms. The Meridian eight-to-sixteen cameras hub, the Horizon sixteen-to-one-hundred cameras hub and the enterprise-grade Latitude system enable thousands of cameras to be managed.
Enterprises can scale the Latitude as required by installing more modules, enabling virtually unlimited cameras to be connected to a single system.