US PATENT SUBCLASS 704 / 213
.~.~.~ Zero crossing

Current as of: June, 1999
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704 /   HD   DATA PROCESSING: SPEECH SIGNAL PROCESSING, LINGUISTICS, LANGUAGE TRANSLATION, AND AUDIO COMPRESSION/DECOMPRESSION

200  DF  SPEECH SIGNAL PROCESSING {4}
201  DF  .~ For storage or transmission {12}
211  DF  .~.~ Time {5}
213.~.~.~ Zero crossing

DEFINITION

Classification: 704/213

Zero crossing:

(under subclass 211) Subject matter wherein the zero crossings of the signal are used to measure time or frequency.