System and method for simultaneous voice and data with adaptive

Details System and method for simultaneous voice and data with adaptive System and method for simultaneous voice and data with adaptive

1997-09-23

2000-08-01

Chin, Stephen

Pulse or digital communications

Apparatus convertible to analog

375222, 375262, 375264, 375265, 375298, 375341, 370206, 370207, H04L 2500, H04L 2700, H04L 516, H04B 138

Patent

active

060977531

ABSTRACT:
An adaptive gain algorithm allows the maximization of gain of an audio signal that is transmitted with a digital data signal by allowing a trellis decoder to compensate for occasional excursions of the audio and noise signal across a signal space boundary. By measuring the short term energy present in an audio signal, the algorithm of the present invention allows the maximum power to be used to transmit an analog signal without overloading the trellis decoder.

REFERENCES:
patent: 5440585 (1995-08-01), Partridge, III
patent: 5448555 (1995-09-01), Bremer et al.
patent: 5521942 (1996-05-01), Betts et al.
patent: 5648989 (1997-07-01), Ko
patent: 5710754 (1998-01-01), Kaku et al.
patent: 5742679 (1998-04-01), Olafsson
patent: 5796716 (1998-08-01), Smith
Bremer et al., "Simultaneous Voice and Data on the General Switched Telephone Network Using Framed QADM," IEEE Communications Magazine, Dec., 1996, pp. 58-63.

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