LUMA NOISE
Noise which manifests itself in a video picture as white snow. It is the product of one or more of the following factors: low signal level due to poor lighting conditions, a poorly-manufactured video device, low quality video tapes, excessively long video cables used without pre-compensation, dirt on the video recorder heads which interferes with reading and writing, and over-enhancement of the video signal. Good quality video processors do not generate Luma noise. They maintain an excellent enhancement level, without sacrificing picture quality, by using noise gates. Snow can easily be reduced or eliminated in poorly recorded tapes and a clean copy can be created. In the digital domain, Luma noise may be a result of poor digitization processes, signal jitter (digital clock related problems), logic level incompatibility and similar voltage-related reasons.
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