Multichannel digital speech synthesizer

Details Multichannel digital speech synthesizer Multichannel digital speech synthesizer

1980-03-14

1982-03-09

Atkinson, Charles E.

179 1B, G10L 100

Patent

active

043190847

ABSTRACT:
A multichannel digital speech synthesizer comprises a pulse generator storing periodic and aperiodic excitation signals to be processed in a lattice filter according to weighting parameters, such as gain and reflection coefficients, transmitted from a computer via a control unit and a plurality of input modules assigned to respective output channels. Each input module includes a resettable counter for timing the emissions of periodic or aperiodic excitation signals, to generate a voiced or an unvoiced speech element, and for requesting a new set of parameters from the computer upon detecting the end of a validity interval for a current set of parameters; the module further comprises a pair of buffer memories alternating in reading and writing operations under the control of the counter to ensure a continuous flow of parameter sets to the filter.

REFERENCES:
patent: 3928722 (1975-12-01), Nakata et al.
Gray, A. et al., "Digital Lattice and Ladder Filter", IEEE Trans. on Audio and Electro., Dec. 1973, pp. 491-500.
Bertinetto, P. et al., "An Interactive Synthesis System etc.", CSELT Rapporti Technici, pp. 325-331.
Flanagan, J., "Synthetic Voices for Computers", IEEE Spectrum, Oct. 1970, pp. 22, 27-29.

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