Patent Document ID: 20020177998
Application ID: 10051469
Patent Flag: 0

Claim One:
1. A method of calibrating the data acquisition path comprising the steps of: applying a voice utterance signal simultaneously to two speech transmission paths where the first path is a high quality reference path and a second test path being the acquisition path; detecting output power density of the reference path to produce signal Y R and detecting output power density of the second test path to produce the power density of the mismatch signal Y N ; processing said reference signal Y R and said mismatch signal Y N to determine channel estimate and noise estimate of the mismatch using equations derived by modeling convolutive H &Dgr; and additive noise N N as polynomial functions of frequency with one order P for H &Dgr; and a different order Q for N N, estimating model parameters using maximum likelihood criterion to determine the parameter set and simultaneously solving linear equation for both order P and Q.