HIWIRE MEETING Nancy, July 6-7, 2006. José C. Segura, Ángel de la Torre. Schedule. Non-linear feature normalization for mobile platform Integration scheme Results and discussion Rapid speaker adaptation Combination of adaptation at signal level and acoustic model level
where the function g0, f0 and h0 are evaluated at the mean of the clean Gaussian and at the mean of the noise:
is the k-th Gaussian evaluated at the noisy speech y, and P(k) is the a-priori probability of the Gaussian.
assuming small values of the variance of the noise:
and from the estimation of the clean speech:
the uncertainty of the clean speech can be estimated as:
Baseline: 60.5 % (no VAD, no WF, no FD)