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Browse Journals & Magazines > Biomedical Engineering, IEEE ...> Volume:40 Issue:9 Help

A feedback control system for real-time formant estimation. II. Analysis of a hysteresis effect and F2 estimation

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2 Author(s)
Zierhofer, C.M. ; Inst. fuer Experimentalphysik, Innsbruck Univ., Austria ; Hochmair, Erwin S.

For pt.I see ibid., vol.40, no.9, pp.886-91 (1993). The feedback control system behavior is analyzed for an input signal composed of two sinusoids. If the frequency difference between the two input spectral lines is sufficiently great and the amplitude ratio is within certain limits, a hysteresis effect occurs. Then the system shows a tendency to select one of the two input spectral lines. The existence of the second line has only little influence on the accuracy of the detection of the selected line. From the analysis, conclusions of the system behavior regarding formant estimation can be drawn. A design example for second formant detection is simulated and compared with the results obtained by simulation of a zero-crossing system for F2 estimation and linear predictive coding (LPC) analysis.

Published in:
Biomedical Engineering, IEEE Transactions on  (Volume:40 ,  Issue: 9 )

Date of Publication: Sept. 1993

Page(s):
892 - 898
ISSN :
0018-9294
INSPEC Accession Number:
4615219
Digital Object Identifier :
10.1109/10.245610
Product Type:
Journals & Magazines
Date of Current Version :
06 August 2002
Issue Date :
Sept. 1993
Sponsored by :
IEEE Engineering in Medicine and Biology Society
PubMed ID :
8288280

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