Data processing: speech signal processing – linguistics – language – Speech signal processing – Synthesis
Patent
1996-11-06
1999-04-06
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Synthesis
704258, 704264, 704220, G10L 914
Patent
active
058930612
ABSTRACT:
A new scheme to generate the stochastic excitation for a CELP-type speech codec based upon a hybrid stochastic codebook search technique including use of regular pulse excitation codebooks is described. From the ideal RPE sequence the position of the first nonzero pulse and the position of the pulse with maximum amount as well as the overall sign of the RPE sequence are determined. The corresponding target vectors and pulse responses of the synthesis filter are stored in databases belonging to the positions of the maximum pulse, respectively. These databases are used to derive the stochastic codebook via the so-called LBG-algorithm. Once the codebook has become available, the position of the maximum pulse serves as pre-selection measure to limit the search for the "best" candidate vector to a "small" subset of the stochastic codebook.
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Abebe Daniel
Hudspeth David R.
Nokia Mobile Phones Ltd.
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