US PATENT SUBCLASS 348 / 613
.~.~.~ Complementary system (e.g., preemphasis - deemphasis)

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}
613.~.~.~ Complementary system (e.g., preemphasis - deemphasis)

DEFINITION

Classification: 348/613

Complementary system (e.g., preemphasis - deemphasis):

(under subclass 608) Subject matter wherein the undesired signal reduction requires circuitry at both the transmitter and receiver with the functions being generally opposite.

(1) Note. In general the circuit at the transmitter increases amplitude while the circuit at the receiver decreases amplitude.