Speech Dereverberation Using Non-Negative Convolutive Transfer Function and Spectro-Temporal Modeling

Spectro - Temporal Modulation Transfer Functions and Speech

Phoneme Classification Using Temporal Tracking of Speech Clusters in Spectro-temporal Domain

This article presents a new feature extraction technique based on the temporal tracking of clusters in spectro-temporal features space. In the proposed method, auditory cortical outputs were clustered. The attributes of speech clusters were extracted as secondary features. However, the shape and position of speech clusters change during the time. The clusters temporally tracked and temporal tra...

Speech overlap detection using convolutive non-negative sparse coding

Overlapping speech is known to degrade speaker diarization performance with impacts on both speech activity detection, speaker clustering and segmentation (speaker error). While previous related work has made important advances the problem remains largely unsolved. This paper reports early work to investigate the application of non-negative matrix factorisation (NMF) to the overlap problem. NMF...

Spectro-temporal modulation transfer functions and speech intelligibility.

Detection thresholds for spectral and temporal modulations are measured using broadband spectra with sinusoidally rippled profiles that drift up or down the log-frequency axis at constant velocities. Spectro-temporal modulation transfer functions (MTFs) are derived as a function of ripple peak density (omega cycles/octave) and drifting velocity (omega Hz). The MTFs exhibit a low-pass function w...

Blind MultiChannel Identification and Equalization for Dereverberation and Noise Reduction based on Convolutive Transfer Function

This paper addresses the problems of blind channel identification and multichannel equalization for speech dereverberation and noise reduction. The time-domain cross-relation method is not suitable for blind room impulse response identification, due to the near-common zeros of the long impulse responses. We extend the cross-relation method to the short-time Fourier transform (STFT) domain, in w...