US PATENT SUBCLASS 341 / 143
.~ Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)

Current as of: June, 1999
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341 /   HD   CODED DATA GENERATION OR CONVERSION

126  DF  ANALOG TO OR FROM DIGITAL CONVERSION {12}
143.~ Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)

DEFINITION

Classification: 341/143

Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation):

(under subclass 126) Subject matter wherein the analog signal which is to be encoded or decoded depends on the difference between a given analog signal and the analog signal previously encoded or decoded.

SEE OR SEARCH THIS CLASS, SUBCLASS:

76, for digital to digital code converters where one of the codes is a differential code.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

244+, for communication systems using differential codes.

704, 704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression, 500+, for differential encoding of audio signals.