The analog video technology is despite the boom in IP-based solutions from the current safety everyday not indispensable. On the contrary: They evolved. The high-resolution standard 960H is the best example of analog innovation. With this new technology can significantly improve the quality of conventional video systems achieve.
Picture: Grundig Security
Comparison of resolutions conventional analog video technology (right) with 960H video art (left). (Picture: Grundig Security)
An international study by IMS Research predicted recently: The analog video technology is used for many years to at level rise further. The main reasons for this are on the one hand the already installed coaxial cable, and on the other hand, the relatively cheap components of the systems.
But in order to keep pace with the increasing demands on quality and resolution step requires new technical approaches. With the standard 960H (or HD analog), this is achieved without massive new investment.
30 percent more image
Until now it used in analog cameras typically image sensors with 752 by 582 pixels. When 960H standard sensors are fitted with a resolution of 976 x 582 pixels in the cameras, however. Thus 960H image sensors have about 130,000 pixels more than conventional models. This corresponds to an increase in resolution of about 30 percent over taken with D1-art video.
The resulting resolution of over 650 TV lines in color (700 TV lines in black and white) is currently the highest quality available on the analog market. It manifests itself in practice in the form of greater detail recognition and a better overall viewing experience. The picture is sharper, so that it is easier to distinguish objects close together.
Another advantage of the technique: The image must not be distorted to be displayed correctly on widescreen TVs and monitors.
From a technological perspective, the main benefit of the 960H standards is the higher resolution. But the wide dynamic range and consistent performance at low light among the advantages.
The clever arrangement of the conductor tracks on the new CCD chip of the light-sensitive part of the sensors can be utilized better. This means that the 960H image sensor the same sensitivity to light has such low-resolution chips.
The stability of the 960H components is the same as in conventional analog systems. This is only logical, because over the years the mature analog system technology has been continually perfected, so that provides images in daily operations in real time and without latency. This problem is still not yet fully overcome in network cameras.
On the other hand 960H provides an advantage in practice over HD-SDI. Although HD-SDI can theoretically provide real-time images in HD resolution, but any existing coaxial cable is not long since adapted from a qualitative point of view, in order to transmit the signals without interference.
From the perspective of users and installers 960H is also simple to use, because it is fully backward compatible with the conventional PAL standard. If in a video system so the old analog cameras replaced by 960H models, they are fully compatible with the other components.
The 960H cameras use the same BNC cable as classic components with lower resolution. So saves upgrading to 960H as compared to a completely new wired IP camera system quite a bit of time and money.
However, it should be noted that the full quality of the 960H technology can only be achieved if all the components of the video equipment are adapted to the new standard: cameras, transmission, recording solutions and monitors must support the higher resolution. If some of the components chain not tuned to 960H, the picture quality of the previously known analog technology.
Perspective existing video systems can be upgraded bit by bit to the new state by the compatibility. Even devices from different manufacturers can be combined easily.