US PATENT SUBCLASS 380 / 17
.~.~ Phase inversion of scan line information

Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

9  DF  ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
10  DF  .~ Video {10}
17.~.~ Phase inversion of scan line information

DEFINITION

Classification: 380/17

Phase inversion of scan line information:

(under subclass 10) Subject matter which inverts the phase of selected video scan line information signals.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+, for encryption using phase inversion not limited to video communication.