Noise adaptive training using a vector taylor series approach for noise robust automatic speech recognition

• Main Authors: Kalinli, O., Seltzer, M.L., Acero, A.
• Format: Conference Proceeding
• Language: English
• Subjects: Acoustic noise; Adaptation model; Automatic speech recognition; Decoding; model adaptation; Network address translation; Noise adaptive training; Noise robustness; robust automatic speech recognition; Speech enhancement; Speech processing; Taylor series; vector Taylor series; Working environment noise
• ISSN: 1520-6149; 2379-190X
• DOI: 10.1109/ICASSP.2009.4960461

In traditional methods for noise robust automatic speech recognition, the acoustic models are typically trained using clean speech or using multi-condition data that is processed by the same feature enhancement algorithm expected to be used in decoding. In this paper, we propose a noise adaptive training (NAT) algorithm that can be applied to all training data that normalizes the environmental distortion as part of the model training. In contrast to the feature enhancement methods, NAT estimates the underlying ldquopseudo-cleanrdquo model parameters directly without relying on point estimates of the clean speech features as an intermediate step. The pseudo-clean model parameters learned with NAT are later used with vector Taylor series (VTS) model adaptation for decoding noisy utterances at test time. Experiments performed on the Aurora 2 and Aurora 3 tasks, demonstrate that the proposed NAT method obtain relative improvements of 18.83% and 32.02%, respectively, over VTS model adaptation.