PITCH ESTIMATION FRAMEWORK FOR SPEECH SEGREGATION USING COCHLEAGRAM MORPHING

M. J. Khan; H. A. Habib

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PITCH ESTIMATION FRAMEWORK FOR SPEECH SEGREGATION USING COCHLEAGRAM MORPHING

Author(s)

M. J. Khan Department of Computer Engineering, University of Engineering and Technology,Taxila,Pakistan

H. A. Habib Department of Computer Engineering, University of Engineering and Technology,Taxila,Pakistan

Abstract

Computational auditory scene analysis (CASA) has significant role in speech segregation from monaural audio mixtures and generally a measure for performance of speech recognition systems. Pitch estimation has a substantial role in performance of CASA systems. This study presents a novel pitch estimation framework for speech segregation from monaural audio mixtures using cochleagram morphing. The proposed framework takes the rough estimation of target pitch from given audio mixtures containing speech and background interferences. Discrete set consisting morphed versions of cochleagram is obtained using k-Means clustering. The estimated pitch values are improved by validating and smoothing them to morphed cochleagram. Measure of refined estimated pitch contours along with harmonicity and temporal continuity are used to segregate target speech. The proposed framework produced 83.13% accuracy for MIR-1k dataset which is considerably higher than the existing methods.

Publication Details

Page(s) 383-392

DOI DOI not available

Published Journal: Pakistan Journal of Science, Volume: 67, Issue: 4, Year: 2015

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Keywords

K-Means, Pitch range estimation, Source separation, Computer auditory scene analysis (CASA), Spectral Peaks