Digital communication device

Details Digital communication device Digital communication device

1991-08-22

1998-10-06

Chin, Stephen

Pulse or digital communications

Transceivers

375222, 375242, 375350, H04B 138

Patent

active

058188703

ABSTRACT:
A digital communication device of the present invention is provided with a modulation circuit for modulating a digital transmit signal, a first interpolater for converting the modulated signal in frequency, a coding circuit for coding the signal converted in frequency into an audio PCM transmission code with reference to a voice companding code table, a decoding circuit for decoding a coded audio PCM receive code into a digital signal with reference to the voice companding code table, a second interpolater for converting the decoded digital signal in frequency, and a demodulation circuit for demodulating the converted signal, and digitally performs modem modulation/demodulation and voice codec processing.

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Pat. Abs. JP. vol. 13, No. 404, Sept. 7, 1989.

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