Representation of fine structure of speech signals using time-frequency zeros

Akimasa Okada; Nobutaka Ono; Shigeru Ando

doi:10.11499/sicep.2004.0_23_4

SICE Annual Conference 2004

DOI https://doi.org/10.11499/sicep.2004.0_23_4

Conference information

Host: The Society of Instrument and Control Engineers

Co-host: The IEEE Industrial Electronics Society, The IEEE Robotics and Automation Society, The IEEE Control Systems Society, The IEEE Systems, Man and Cybernetics Society, The Instrumentation, Systems, and Automation Society

Representation of fine structure of speech signals using time-frequency zeros

*Akimasa Okada, Nobutaka Ono, Shigeru Ando

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CONFERENCE PROCEEDINGS FREE ACCESS

Pages 23

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Abstract

In this paper, we propose a novel time-frequency analysis method for speech, which consists of 1) subband decomposition by the holomorphic filterbank proposed by us, and 2) detection of time-frequency zeros. By theoretical analysis and experiments, we show that 1) voiced speech generates a stable two-dimensional (2-D) maps of zeros which are different vowels by vowels, 2) it represents pitch structure, formant structure, and glottal excitation instance, which are important for analyzing voiced speech in frequency and time domain.

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