Publication:
Using group delay functions from all-pole models for speaker recognition

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Date

2013

Authors

Hanilçi, Cemal

Authors

Rajan, Padmanabhan
Kinnunen, Tomi H.
Pohjalainen, Jouni
Alku, Paavo
Bimbot, F.
Cerisara, C.
Fougeron, C.
Gravier, G.
Lamel, L.
Pellegrino, F.

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Isc-Int Speech Communication Association

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Abstract

Popular features for speech processing, such as mel-frequency cepstral coefficients (MFCCs), are derived from the short-term magnitude spectrum, whereas the phase spectrum remains unused. While the common argument to use only the magnitude spectrum is that the human ear is phase-deaf, phase-based features have remained less explored due to additional signal processing difficulties they introduce. A useful representation of the phase is the group delay function, but its robust computation remains difficult. This paper advocates the use of group delay functions derived from parametric all-pole models instead of their direct computation from the discrete Fourier transform. Using a subset of the vocal effort data in the NIST 2010 speaker recognition evaluation (SRE) corpus, we show that group delay features derived via parametric all-pole models improve recognition accuracy, especially under high vocal effort. Additionally, the group delay features provide comparable or improved accuracy over conventional magnitude-based MFCC features. Thus, the use of group delay functions derived from all-pole models provide an effective way to utilize information from the phase spectrum of speech signals.

Description

Bu çalışma, 25-29 Ağustos 2013 tarihlerinde Lyon[Fransa]'da düzenlenen 14. Annual Conference of the International Speech Communication Association [Interspeech 2013]'da bildiri olarak sunulmuştur.

Keywords

Computer science, Engineering, Speaker verification, Group delay functions, High vocal effort, Additive noise, Verification, Discrete Fourier transforms, Group delay, Poles, Signal processing, Speech processing, Direct computations, Group delay functions, Mel-frequency cepstral coefficients, Recognition accuracy, Speaker recognition, Speaker recognition evaluations, Speaker verification, Vocal efforts, Speech recognition

Citation

Rajan, P. vd. (2013). "Using group delay functions from all-pole models for speaker recognition". 14th Annual Conference of the International Speech Communication Association (Interspeech 2013), 1-5, 2488-2492.

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