The delta-phase spectrum with application to voice activity detection and speaker recognition
McCowan, Iain, Dean, David B., McLaren, Mitchell L., Vogt, Robert J., & Sridharan, Sridha (2011) The delta-phase spectrum with application to voice activity detection and speaker recognition. IEEE Transactions on Audio, Speech, and Language Processing. (In Press)
For several reasons, the Fourier phase domain is less favoured than the magnitude domain in signal processing and modelling of speech. To correctly analyse the phase, several factors must be considered and compensated, including the effect of the step size, windowing function and other processing parameters. Building on a review of these factors, this paper investigates a spectral representation based on the Instantaneous Frequency Deviation, but in which the step size between processing frames is used in calculating phase changes, rather than the traditional single sample interval. Reﬂecting these longer intervals, the term Delta-Phase Spectrum is used to distinguish this from instantaneous derivatives. Experiments
show that mel-frequency cepstral coefﬁcients features derived from the Delta-Phase Spectrum (termed Mel-Frequency Delta-Phase features) can produce broadly similar performance to equivalent magnitude domain features for both voice activity detection and speaker recognition tasks. Further, it is shown that the fusion of the magnitude and phase representations yields performance beneﬁts over either in isolation.
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|Item Type:||Journal Article|
|Keywords:||phase, instantaneous frequency, speech analysis, voice activity detection, speaker recognition|
|Subjects:||Australian and New Zealand Standard Research Classification > LANGUAGES COMMUNICATION AND CULTURE (200000) > LINGUISTICS (200400) > Laboratory Phonetics and Speech Science (200404)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Institutes > Information Security Institute
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2011 IEEE|
|Deposited On:||17 Feb 2011 09:35|
|Last Modified:||17 Feb 2011 16:24|
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