US PATENT SUBCLASS 704 / 212
.~.~.~ Pulse code modulation (PCM)

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}
212.~.~.~ Pulse code modulation (PCM)

DEFINITION

Classification: 704/212

Pulse code modulation (PCM):

(under subclass 211) Subject matter wherein the signal is sampled over time, and the magnitude of each sample is quantized and converted into a digital signal.