US PATENT SUBCLASS 348 / 691
.~ DC insertion

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
691.~ DC insertion {6}
692  DF  .~.~> Color television
693  DF  .~.~> At transmitter
694  DF  .~.~> For plural signals or signal components
695  DF  .~.~> Level inserted during keying signals (e.g., keyed clamp)
696  DF  .~.~> Insertion level derived by key signals {1}
698  DF  .~.~> Diode

DEFINITION

Classification: 348/691

DC insertion:

(under subclass 571) Subject matter including apparatus for setting, maintaining, or reestablishing the direct current voltage level in an image signal.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

309+, for miscellaneous limiting, clipping, and clamping circuits.

330, Amplifiers,

11, for amplifiers with DC reinsertion circuits.