Formant detecting device and speech processing apparatus

Details Formant detecting device and speech processing apparatus Formant detecting device and speech processing apparatus

1993-10-27

1995-12-26

MacDonald, Allen R.

395 235, 395 237, G10L 904

Patent

active

054795605

ABSTRACT:
A speech processing apparatus for obtaining a processed speech which is natural and comfortable for a listener, by refining a gain value assigned for each frequency band in enhancing formants in a power spectrum. The power spectrum, calculated in a frequency analyzing unit, is subject to contrast enhancement in a contrast enhancing unit, and judged as to whether it is a format or not in each frequency band. In a gain value assigning unit, a gain value of 1 is assigned to a formant, and a gain value smaller than 1 is to a frequency other than formant. A threshold value for each frequency band is determined by a threshold value determining unit in accordance with power spectrum of input speech signal, to eliminate the effect of variation in speech level.

REFERENCES:
patent: 4186280 (1980-01-01), Geiseler
patent: 4490839 (1984-12-01), Bunge
patent: 4617676 (1986-10-01), Jayant et al.
patent: 4642782 (1987-02-01), Kemper et al.
patent: 4644479 (1987-02-01), Kemper et al.
patent: 4649515 (1987-03-01), Thompson et al.
patent: 4953216 (1990-08-01), Beer
patent: 5018075 (1991-05-01), Ryan et al.
patent: 5133013 (1992-07-01), Munday
patent: 5161158 (1992-11-01), Chakravarty et al.
patent: 5388185 (1995-02-01), Terry et al.
Chemical Plant Fault Diagnosis Using Expert System Technology; Rowan; IFAC; Kyoto, Japan; Sep./Oct. 1986.
Expert Systems in On-Line Process Control; Moore et al.; Expert Systems in Process Control; pp. 839-867; Jul. 6, 1987.
A Continuous Real-Time Expert System for Computer Operations; Ennis et al; pp. 14-27; IBM J. Res. Develop. vol. 30, No. 1; Jan. 1986.
Kabal et al, "Adaptive Posifiltering for Enhancement of Noisy Speech in the Frequency Domain", Circuits & Systems, 1991 IEEE Int'l Symposium Apr. 1991 pp. 312-315.
Sangwine, S. J., "Fault Diagnosis in Combinational digital Circuits Using a Backtrack Algorithm to Generate Fault Location Hypotheses", IEE Proceedings, vol. 135(6), Dec. 1988, 247-252.
Simpson et al, Acta Otolaryngol (Stockh) 1990, Suppl. 469, pp. 101-107, "Spectral Enhancement to Improve the Intelligibility of Speech in Noise for Hearing-Impaired Listeners".
Cheng et al, IEEE Transactions on Signal Processing, vol. 39, No. 9, Sep. 1991, pp. 1943-1954, "Speech Enhancement Based Conceptually on Auditory Evidence".

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