Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1997-12-11
2000-10-03
Woo, Stella
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379399, H04M 1100
Patent
active
061283746
ABSTRACT:
A digital audio transmitter system capable of transmitting high quality, wideband speech over a transmission channel with a limited bandwidth such as a traditional telephone line. The digital audio transmitter system includes a coder for coding an input audio signal to a digital signal having a transmission rate that does not exceed the maximum allowable transmission rate for traditional telephone lines and a decoder for decoding the digital signal to provide an output audio signal with an audio bandwidth of wideband speech. A coder and a decoder may be provided in a single device to allow two-way communication between multiple devices.
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CDQ1000 Reference Manual, Revision 3.3, dated May 1994.
CDQ2000 Reference Manual, Revision 6.92-2, dated Jul. 27, 1994.
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Corporate Computer Systems
Ryan Robert C.
Woo Stella
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