Evaluation of Frequency Warping Based Features and Spectro-Temporal Features for Speaker Recognition

Spectro-temporal features for robust far-field speaker identification

Features derived from an auditory spectro-temporal representation of speech are proposed for robust far-field speaker identification. The auditory representation is obtained by first filtering the speech signal with a gammatone filterbank. A modulation filterbank is then applied to the temporal envelope of each gammatone filter output. Compared to commonly used mel-frequency cepstral coefficien...

Robust Speech Recognition Based on Localized Spectro-temporal Features

In order to enhance automatic speech recognition performance in adverse conditions, localized spectro-temporal features (LSTF) are investigated, which are motivated by physiological measurements in the primary auditory cortex. In the Aurora2 experimental setup, Gabor-shaped LSTFs combined with a Tandem system yield robust performance with a feature set size of 30. If computational constraints a...

Titel : Robust Speech Recognition based on Spectro - Temporal Features

Spectro-temporal directional derivative features for automatic speech recognition

We introduce a novel spectro-temporal representation of speech by applying directional derivative filters to the Melspectrogram, with the aim of improving the robustness of automatic speech recognition. Previous studies have shown that two-dimensional wavelet functions, when tuned to appropriate spectral scales and temporal rates, are able to accurately capture the acoustic modulations of speec...

Localized spectro-temporal features for automatic speech recognition

Recent results from physiological and psychoacoustic studies indicate that spectrally and temporally localized time-frequency envelope patterns form a relevant basis of auditory perception. This motivates new approaches to feature extraction for automatic speech recognition (ASR) which utilize two-dimensional spectro-temporal modulation filters. The paper provides a motivation and a brief overv...