US PATENT SUBCLASS 348 / 622
.~.~.~ Noise component generator, limiter, subtractor type

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
607  DF  .~ Noise or undesired signal reduction {6}
618  DF  .~.~ For removal of low amplitude random noise (e.g., variable bandwidth) {3}
622.~.~.~ Noise component generator, limiter, subtractor type

DEFINITION

Classification: 348/622

Noise component generator, limiter, subtractor type:

(under subclass 618) Subject matter including a circuitry for generating a difference signal between pixels, limiting the amplitude of the difference signal to a small level, and for subtracting the limited difference signal from the original pixel signal.