Second International Conference on Spoken Language Processing (ICSLP'92)
Banff, Alberta, Canada
October 13-16, 1992
Extrinsic Normalization of Vowel Formant Values Based on Cardinal Vowels Mapping
Maria-Gabriella Di Benedetto (1), Jean-Sylvain Lienard (2)
(1) INFOCOM Dept, Facolta di Ingegneria, University of Rome 'La
Sapienza', Roma, Italia
(2) LIMSI-CNRS, Orsay, France
An extrinsic vowel normalization method is proposed. In the
method proposed, a-priori information referring to the first and
second formant values (Fl and F2) of three vowels of each
speaker is used. In order to obtain the normalized formant values
of a given speaker's vowels in a given language it is necessary to:
- gather reference information on three vowels, for example
[i,#,u]. This information corresponds to the Fl and F2 values for
[i,map the formant values of [i,a,u] of the new speaker, onto the
reference formant values. This operation can be achieved by linear
transformation (isomorphic transformation).
- the normalized formant values of the other vowels can be
obtained by applying the isomorphic transformation.
Results are presented for vowels of American English, and briefly
reported for vowels of Italian, and French. Comparison between a
classical F1-F2 and the mapped vowel representations in terms of
statistical parameters are discussed.
Benedetto, Maria-Gabriella Di / Lienard, Jean-Sylvain (1992):
"Extrinsic normalization of vowel formant values based on cardinal vowels mapping",
In ICSLP-1992, 579-582.