Adaptive Digital Impulse Noise Reducer (1993)

By John P. Rossi, Intelvideo, Inc. and Thomas R. Jokerst, Cable Television Laboratories, Inc.

A newly developed adaptive digital signal processing system capable of eliminating most impulse noise from TV signals is described. Video is analyzed pixel by pixel. If the circuits determine that the pixel under analysis contains impulse noise perturbations, and no motion is found in its vicinity, that pixel is replaced with an appropriate predicted value. The system cleans up impulse noise, FM sub-threshold noise, as well as videotape drop outs.

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