Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit
Patent
1997-01-22
2000-03-21
Le, N.
Telephonic communications
Substation or terminal circuitry
Sidetone control or hybrid circuit
379394, 379402, 379406, H04M 100
Patent
active
06041118&
ABSTRACT:
The invention concerns digital processing of analog signals in a telephone set. A signal path runs between a telephone line and the handset of the telephone. A digital signal processor is interconnected within this signal path, together with appropriate analog-to-digital, and digital-to-analog, converters. This approach allows digital processing of the information carried by the signal path. The digital processing facilitates, for example, (1) a high degree of separation of the handset's microphone signal from the received signal, and (2) independent control of volumes of the received signal and sidetone.
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Michel Alan Dean
Williams Eric
Hsieh Shih-Wen
Le N.
Lucent Technologies - Inc.
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