Speech analysis-synthesis system

Details Speech analysis-synthesis system Speech analysis-synthesis system

1982-05-06

1985-05-07

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 30, G10L 100

Patent

active

045162590

ABSTRACT:
In a speech analysis-synthesis system for the narrow band transmission of a speech signal, speech is separated into a plurality of spectrum information (K.sub.i), average (V.sub.0) of linear prediction error signal, pitch period (L), voiced/unvoiced decision signal (V/UV), a pseudo exciting signal (I) which is a part of a linear prediction error signal or an impulse response of the same, and a frame information which determines the interval and the duration of the spectrum analyzation, then, in a receive side, the product of said pseudo excitation signal (I) and said pitch period (L), a white noise is switched according to said voiced/unvoiced decision signal (V/UV), and the output of the switch is applied to a synthesis filter which attaches correlation components to an input signal according to spectrum information (K.sub.i) to provide synthesized speech.

REFERENCES:
patent: 3750024 (1973-07-01), Dunn et al.
Wong, David Y. et al, "An Intelligibility Evaluation of Several Linear Prediction Vocoder Modifications".
IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP 26, No. 5, Oct. 1978.

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