US PATENT SUBCLASS 348 / 618
.~.~ For removal of low amplitude random noise (e.g., variable bandwidth)

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.~.~ For removal of low amplitude random noise (e.g., variable bandwidth) {3}
619  DF  .~.~.~> Averaging type {2}
622  DF  .~.~.~> Noise component generator, limiter, subtractor type
623  DF  .~.~.~> Coring type

DEFINITION

Classification: 348/618

For removal of low amplitude random noise (e.g., variable bandwidth):

(under subclass 607) Subject matter including a specific circuitry for reducing small amplitude differences between pixels without, in general, significantly altering large amplitude differences.