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SAMSUNG Super Noise Reduction - SSNR |
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Monday, 11 May 2009 13:13 |
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What usually makes images unusable when they are captured in very low light situations is the amount of “noise” that they carry. Noise occurs when AGC (Automatic Gain Control) attempts to compensate if the video signal is weak, but it is usually the graininess and snow-type effects that render an image unusable before the actual darkness does. If this noise can be removed, the images will still be usable even at very low light levels.
Samsung’s Super Noise Reduction technology – SSNR, makes images cleaner and sharper by eliminating high levels of noise created when lighting levels are low.
SSNR eliminates noise without creating ghosting or motion blur. Independent tests have shown that colour images with SSNR applied stay sharp and clean, even after colour information is lost due to a lack of light. This shows that SSNR reduces noise in colour images that are well below the usual standard signal strength of 1V peak to peak without the pictures becoming unusable for CCTV purposes. The technology is even more impressive when the camera is in monochrome mode.
The bonus offered by SSNR is that by reducing the noise from an image, the recorded file size is significantly less – by up to 70%, when using MPEG compression and 40% when using JPEG, resulting in cost savings on the size of hard drive required.
The financial benefits delivered by SSNR could therefore be substantial with end-users’ DVRs being able to record over three times more with MPEG compression and almost twice as much if JPEG compression is used.
The WDR technology built into Samsung Techwin cameras incorporates advance BLC (Back Light Compensation) capability. BLC has become an essential component of CCTV cameras that are to be located in areas where there may be bright sunlight.
Different manufacturers use different methods to achieve the objective which is to electronically compensate for high background lighting and thus provide detail of people or objects that would normally be silhouetted. Techwin BLC combines two separate fields of the same image. The first field is taken at a high shutter speed of the bright areas and the second field is taken of dark areas.
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SAMSUNG Super Noise Reduction - SSNR
