Language independent speech recognition
First Claim
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1. A language independent speech recognition system comprising:
- a. a speech pre-processor which receives input speech and produces a speech-related signal representative of the input speech;
b. a database of acoustic hidden Markov models which represent subword units in each of a plurality of languages, wherein any subword unit that is common to two or more of the plurality of languages is represented by a single common acoustic hidden Markov model;
c. a language model which characterizes a vocabulary of recognizable words and a set of grammar rules; and
d. a speech recognizer which compares the speech-related signal to the acoustic hidden Markov models and the language model, and recognizes the input speech as a specific word sequence of at least one word.
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Abstract
A speech recognition system uses language independent acoustic models derived from speech data from multiple languages to represent speech units which are concatenated into words. In addition, the input speech signal which is compared to the language independent acoustic models may be vector quantized according to a codebook which is derived from speech data from multiple languages.
202 Citations
26 Claims
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1. A language independent speech recognition system comprising:
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a. a speech pre-processor which receives input speech and produces a speech-related signal representative of the input speech; b. a database of acoustic hidden Markov models which represent subword units in each of a plurality of languages, wherein any subword unit that is common to two or more of the plurality of languages is represented by a single common acoustic hidden Markov model; c. a language model which characterizes a vocabulary of recognizable words and a set of grammar rules; and d. a speech recognizer which compares the speech-related signal to the acoustic hidden Markov models and the language model, and recognizes the input speech as a specific word sequence of at least one word. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of language independent speech recognition comprising:
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a. receiving input speech with a speech pre-processor and producing a speech-related signal representative of the input speech; b. representing in a database of acoustic hidden Markov models, subword units in each of a plurality of languages, wherein any subword unit that is common to two or more of the plurality of languages is represented by a single common acoustic hidden Markov model; c. characterizing in a language model a vocabulary of recognizable words and a set of grammar rules; and d. comparing in a speech recognizer the speech-related signal to the acoustic hidden Markov models and the language model, and recognizing the input speech as a specific word sequence of at least one word. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification