US PATENT SUBCLASS 348 / 689
.~.~ With DC clamping

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
687  DF  .~ Brightness control {2}
689.~.~ With DC clamping

DEFINITION

Classification: 348/689

With DC clamping:

(under subclass 687) Subject matter including means to set the black level of a TV signal to a reference value.