US PATENT SUBCLASS 348 / 643
.~ Color killer

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
643.~ Color killer {1}
644  DF  .~.~> Including chrominance signal amplitude control

DEFINITION

Classification: 348/643

Color killer:

(under subclass 571) Subject matter including apparatus which

disables the chrominance channel upon occurrence of a noncolor signal or a chrominance signal with insufficient amplitude or phase coherence.