US PATENT SUBCLASS 381 / 22
.~.~.~.~ Variable decoder

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

1  DF  BINAURAL AND STEREOPHONIC {8}
19  DF  .~ Quadrasonic {1}
20  DF  .~.~ Matrix {1}
21  DF  .~.~.~ 4-2-4 {2}
22.~.~.~.~ Variable decoder

DEFINITION

Classification: 381/22

Variable decoder:

(under subclass 21) Subject matter where the two more complex signals are combined in variable ratios in order to recover the four independent sound signals.