US PATENT SUBCLASS 370 / 484
.~.~ Digital analysis or synthesis of a group

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9}
480  DF  .~ Combining or distributing information via frequency channels {11}
484.~.~ Digital analysis or synthesis of a group

DEFINITION

Classification: 370/484

Digital analysis or synthesis of a group:

(under subclass 480) Subject matter in which a frequency multiplex composite spectrum is produced or resolved into its constituent channels by digital processing techniques (e.g., digital filters).

SEE OR SEARCH CLASS

708, Electrical Computers: Arithmetic Processing and Calculating,

300+, for a digital filter.