HD CCTV CAMERAS
HD CCTV, or high definition closed-circuit television, security systems might be the most significant improvement to security, risk management and loss mitigation technology in decades. Security cameras have been used for many, many years – and historically, have been connected to monitors and recorders with coaxial cable. It hasn’t been until recently that high-definition technology and Internet protocol (IP) connections been available for these cameras. We’ve all seen police shows where the narrator tells the audience to watch closely as footage from an analog black-and-white camera plays. The poor picture quality and lagging frame rate makes it difficult to determine what has even been recorded. If you expect more from your video surveillance – such as crisp, colorful images that you can view on your computer, smart phone, tablet, or other device from anywhere in the world – get an HD CCTV security system from NSW Alarms.
WHY HD CCTV?
High-Definition is no more the terminology for IP solution. The answer is HD-CCTV.
Advantages of HDTV
Up to five times higher resolution than SDTV (Standard Definition)
Thus significantly higher image quality than with HD
Widescreen format with a 16:9 aspect ratio
Network cameras (IP and megapixel) offer advantages in several ways, but can suffer from both latency and network uncertainty. Their advantages include progressive scan technology, ease of deployment and the benefit of Power Over Ethernet (POE). They do not tend to suffer from electrical noise interference, and can offer progressive scan resolutions up to 16 megapixels.
The principal problem with IP cameras is firstly the latency, or delay with getting the images out of the camera. This is because compression is done in the camera (which cannot accommodate powerful processing engine) , rather than in the DVR recorders. More significant than the delay is the uncertainty caused by activity in the network itself; even a network that is committed only to CCTV cameras can exhibit unpredictable behaviour, due to the number of cameras and the volume of activity that requires additional network bandwidth.
