US PATENT SUBCLASS 348 / 671
.~ Gray scale transformation

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
671.~ Gray scale transformation {5}
672  DF  .~.~> Using histogram
673  DF  .~.~> Combined contrast control and brightness or DC level control
674  DF  .~.~> Nonlinear amplitude modification (e.g., gamma) {3}
678  DF  .~.~> Automatic range control (e.g., AGC, automatic contrast control) {5}
686  DF  .~.~> Manual contrast control (e.g., linear)

DEFINITION

Classification: 348/671

Gray scale transformation:

(under subclass 571) Subject matter including circuitry which modifies the range of values contained in a TV signal.