Dispersed impulse generator system and method for efficiently co

Details Dispersed impulse generator system and method for efficiently co Dispersed impulse generator system and method for efficiently co

1996-05-06

1998-07-07

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704211, G10L 500

Patent

active

057783373

ABSTRACT:
A vocoder for generating speech from a plurality of stored speech parameters which computes the excitation signals in the speech production model. The present invention generates a periodic excitation signal with flat frequency response and linear group delay. The present invention uses properties of the phase delay sequence being generated to calculate each of the parameters of the excitation signal in an efficient and optimized manner. Generation of the excitation signal requires computation of the expression: ##EQU1## The above expression uses the equation: ##EQU2## This equation defines the phase relationship between the signals using a linear group delay where .phi.'.sub.I (x)* is the absolute phase offset from the first phase harmonic, I is an index for the harmonic, x is time, P is the pitch period, and k" is a constant. The present invention performs the following iterations to compute the above sequence:

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ICASSP 82 Proceedings, May 3, 4, 5, 1982, Palais Des Congres, Paris, France, Sponsored by the Institute of Electrical and Electronics Engineers, Acoustics, Speech, and Signal Processing Society, vol. 2 of 3, IEEE International Conference on Acoustics, Speech and Signal Processing, pp. 651-654.

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