Method of analyzing input speech and speech analysis apparatus t

Details Method of analyzing input speech and speech analysis apparatus t Method of analyzing input speech and speech analysis apparatus t

1986-10-10

1989-05-02

Salce, Patrick R.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 37, 381 45, 3645135, G10L 500

Patent

active

048275166

ABSTRACT:
A speech analysis apparatus according to the invention, comprising a transforming section for receiving a spectrum envelope, for transforming the spectrum envelope such magnitude data thereof becomes suitable, and for generating a transformed spectrum envelope, an integrator for receiving the transformed spectrum envelope output from the transforming section, for integrating the input spectrum envelope with respect to a predetermined variable, and for outputting an integrated spectrum envelope, and a projection circuit for receiving the transformed spectrum envelope from the transform circuit and the integrated spectrum envelope from the integrator, and for projecting the spectrum envelope with respect to the integrated data. Therefore, the analysis result inherent to the phoneme can be obtained regardless of vocal tract lengths. The spectrum envelope to be projected can be integrated by the integrator, along the frequency axis or the mel axis. The analysis apparatus further includes a spectrum envelope-extractor for obtaining the spectrum envelope, by using cepstrum analysis and smoothing the resultant spectrum envelope. A spectrum envelope in the transition from a consonant to a vowel can be obtained.

REFERENCES:
patent: 3649765 (1972-03-01), Rabiner et al.
patent: 4087632 (1978-05-01), Hafer
patent: 4344031 (1982-08-01), Kuhn et al.
"Cepstrum Pitch Determination" by A. Michael Noll, J. Acoust. Soc. Am., vol. 41, pp. 293-309, Feb. 1967.
IEEE Transaction on Audio and Electroacoustics, vol. AU-16, No. 2, Jun. 1968, pp. 256-261, N.Y., "Some Experiments with a Simple Word Recognition System" J. N. Shearme, et al.
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-29, No. 4, Aug. 1981, pp. 786-794, "The Special Envelope Stimation Vocoder", D. B. Paul.
ICASSP 83, Boston, Apr. 14th-16th 1983, vol. 1 or 3, pp. 93-96, N.Y., "Cepstal Analysis Synthesis on the Mel Frequency Scale" S. Imai.
Electronics and Communications in Japan, vol. 62-A, No. 4, 1979, pp. 10-17, "Spectral Envelope Extraction by Improved Cepstral Method" S. Imai, et al.

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