US PATENT SUBCLASS 348 / 700
.~ Motion dependent key signal generation or scene change detection

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
700.~ Motion dependent key signal generation or scene change detection {2}
701  DF  .~.~> Specified processing of frame or field difference signal (e.g., noise reduction, key signal spreading)
702  DF  .~.~> Composite color signal

DEFINITION

Classification: 348/700

Motion dependent key signal generation or scene change detection:

(under subclass 571) Subject matter including a specific circuitry to produce a signal which indicates which areas of a frame are changed from one frame to another or to indicate that a frame is unrelated to a previous frame.

(1) Note. Most systems use frame or field differences.

(2) Note. The signals generated herein are used to control processing of the video signal, such as line doubling, noise reduction, or Y/C separation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

451, or 452, for motion adaptive line doublers.

620, for noise reduction using frame or field delays which are mostly motion adapted.

669, for Y/C separation using a frame comb filter which are mostly motion adapted selecting either frame or line comb outputs depending on the motion signal.