Abstract: A method and device for analog simultaneous voice and data transmission over an analog channel encodes at a voice signal sampling rate a sampled voice signal including spectral and pitch information. During encoding, the spectral and pitch information is extracted from the sampled voice signal to produce a residual signal, and the residual signal is converted into a sequence of residual vectors at a Baud rate. Then, a bitstream including non voice data and the extracted spectral and pitch information is produced. A modem unit, operating at Baud rate and producing an output carrier wave supplied to the analog channel, produces a sequence of symbol vectors in response to the sequence of residual vectors and the bitstream, and modulates the output carrier wave in response to the sequence of symbol vectors.
Type:
Grant
Filed:
June 4, 1997
Date of Patent:
February 22, 2000
Assignees:
International Business Machines Corporation, University de Sherbrooke
Inventors:
Redwan Salami, Claude Laflamme, Jean-Pierre Adoul, Ali S. Sadri, Sasan Ardalan, Hua Ye