Method and device for speech signal pitch period estimation and

Details Method and device for speech signal pitch period estimation and Method and device for speech signal pitch period estimation and

1994-05-17

1996-08-20

Tung, Kee Mei

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

395 216, 395 217, 395 229, 395 271, 381 38, G10L 302

Patent

active

055486800

ABSTRACT:
A method and a device for speech signal digital coding are provided where at each frame there is carried out a long-term analysis for estimating pitch period d and a long- term prediction coefficient b and gain G, and an a-priori classification of the signal as active/inactive and, for active signal, as voiced/unvoiced. Period estimation circuits (LT1) compute such period on the basis of a suitably weighted covariance function, and classification circuits (RV) distinguish voiced signals from unvoiced signals by comparing long-term prediction coefficient and gain with frame-by-frame variable thresholds.

REFERENCES:
patent: 5208862 (1993-05-01), Ozawa et al.
patent: 5233660 (1993-08-01), Chen
patent: 5359696 (1994-10-01), Gerson et al.
"Variable Rate Speech Coding With Online Segmention and Fast Algebraic Co", R. DiFrancesco et al; S4b.5; pp. 233-236; CH2847-2/90/000-0233, 1990 IEEE.

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