US PATENT SUBCLASS 348 / 611
.~.~.~ To suppress echo

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}
608  DF  .~.~ Processing at encoder or transmitter (e.g., pre-correction) {4}
611.~.~.~ To suppress echo

DEFINITION

Classification: 348/611

To suppress echo:

(under subclass 608) Subject matter including apparatus for materially reducing or eliminating the effects of reflected or time delayed versions of the same signal on the displayed image.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

259+, for pulse communications with interference prevention.

455, Telecommunications,

63+, for interference prevention in radio systems.