Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Reexamination Certificate
2005-06-28
2005-06-28
Azad, Abul K. (Department: 2654)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
C704S255000, C704S008000
Reexamination Certificate
active
06912499
ABSTRACT:
The invention relates to a method and apparatus for training a multilingual speech model set. The multilingual speech model set generated is suitable for use by a speech recognition system for recognizing spoken utterances for at least two different languages. The invention allows using a single speech recognition unit with a single speech model set to perform speech recognition on utterances from two or more languages. The method and apparatus make use of a group of a group of acoustic sub-word units comprised of a first subgroup of acoustic sub-word units associated to a first language and a second subgroup of acoustic sub-word units associated to a second language where the first subgroup and the second subgroup share at least one common acoustic sub-word unit. The method and apparatus also make use of a plurality of letter to acoustic sub-word unit rules sets, each letter to acoustic sub-word unit rules set being associated to a different language. A set of untrained speech models is trained on the basis of a training set comprising speech tokens and their associated labels in combination with the group of acoustic sub-word units and the plurality of letter to acoustic sub-word unit rules sets. The invention also provides a computer readable storage medium comprising a program element for implementing the method for training a multilingual speech model set.
REFERENCES:
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patent: 5502790 (1996-03-01), Yi
patent: 6085160 (2000-07-01), D'hoore et al.
patent: 6292779 (2001-09-01), Wilson et al.
John R. Deller, Jr. et al.; Discrete-Time Processing of Speech Signals; 1993; Macmillan; pp. 116-137.
Robillard Serge
Sabourin Michael G.
Azad Abul K.
Nortel Networks Limited
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