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An AM-FM model for representing modulations in speech resonances is investigated. Specifically, an FM model is proposed for the time-varying formants whose amplitude varies as the envelope of an AM signal. To detect the modulations the energy operator Ψ(χ) and its discrete counterpart are applied. It is found that Ψ can approximately track the envelope of AM signals, the instantaneous frequency of FM signals, and the product of these two functions in the general case of AM-FM signals. Several experiments on the application of this AM-FM modeling to speech signals, band pass filtered via Gabor filters are reported
Published in:
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Date of Conference: 14-17 Apr 1991
- Page(s):
- 421 - 424 vol.1
- Meeting Date :
- 14 May 1991-17 May 1991
- ISSN :
- 1520-6149
- Print ISBN:
- 0-7803-0003-3
- INSPEC Accession Number:
- 4155196
- Conference Location :
- Toronto, Ont.
- Digital Object Identifier :
- 10.1109/ICASSP.1991.150366
- Product Type:
- Conference Publications
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