Speech synthesis with equal interval line spectral pair frequenc

Details Speech synthesis with equal interval line spectral pair frequenc Speech synthesis with equal interval line spectral pair frequenc

1997-02-06

1999-01-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704265, G01L 302, G01L 900

Patent

active

058647961

ABSTRACT:
A speech synthesis apparatus in which spectrum emphasis characteristics can be set easily taking into account the frequency response and psychoacoustic hearing sense and in which the degree of freedom in setting the response is larger. An excitation signal ex(n) is synthesized by a synthesis filter 12 to give a synthesized speech signal which is sent to a spectrum emphasis filter 13. The spectrum emphasis filter 13 spectrum-emphasizes the synthesized speech signal and outputs the resulting spectrum-emphasized signal. The vocal tract parameters from an input terminal 21 are converted by a parameter conversion circuit 23 into linear spectral pair (LSP) frequencies which are interpolated by an LSP interpolation circuit 24 with equal-interval line spectral pair frequencies to produce interpolated LSP frequencies. The transfer function of the spectrum emphasis filter 13 is determined on the basis of the interpolated LSP frequencies.

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Yang et al., A 5.4 kbps Speech Coder Based on Multi-Band Excitation and Linear Predictive Coding, Proceedings of the Region 10 Annual International Conference (Tence, Singapore, Aug. 22-24, 1994), vol. 1, pp. 417-421.
Ai et al., A 6.6kb/s CELP Speech Coder: High Performance for GSM Half-Rate System, 1994 International Symposium on Speech, Image Processing and Neural Networks (Hong Kong, Apr. 13-16, 1994), ISBN 0-7803-1865-X, vol. 2, pp. 555-558.

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