Method and apparatus using decision trees to generate and score

Details Method and apparatus using decision trees to generate and score Method and apparatus using decision trees to generate and score

1998-04-29

2000-01-18

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Synthesis

704267, 704270, G10L 504

Patent

active

060164719

ABSTRACT:
The mixed decision tree includes a network of yes-no questions about adjacent letters in a spelled word sequence and also about adjacent phonemes in the phoneme sequence corresponding to the spelled word sequence. Leaf nodes of the mixed decision tree provide information about which phonetic transcriptions are most probable. Using the mixed trees, scores are developed for each of a plurality of possible pronunciations, and these scores can be used to select the best pronunciation as well as to rank pronunciations in order of probability. The pronunciations generated by the system can be used in speech synthesis and speech recognition applications as well as lexicography applications.

REFERENCES:
patent: 5679001 (1997-10-01), Russell et al.
patent: 5715367 (1998-02-01), Gillick et al.
patent: 5791904 (1998-08-01), Russell et al.
patent: 5794197 (1998-08-01), Alleva et al.
Lalit R. Bahl, et al. "Decision Trees for Phonological Rules in Continuous Speech," Proc. ICASSP 91, p. 185-188, Apr. 1991.
Roland Kuhn, et al. "Improved Decision Trees for Phonetic Modeling," Proc. ICASSP 95, p. 552-555, May 1995.
Thierry Dutoit, An Introduction to Text-To-Speech Synthesis, Kluwer Academic Publishers, sections 4.2.3.1 and 5.4.3, 1997.

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