CA2437620A1 - Hierarchichal language models - Google Patents

Hierarchichal language models Download PDF

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Publication number
CA2437620A1
CA2437620A1 CA002437620A CA2437620A CA2437620A1 CA 2437620 A1 CA2437620 A1 CA 2437620A1 CA 002437620 A CA002437620 A CA 002437620A CA 2437620 A CA2437620 A CA 2437620A CA 2437620 A1 CA2437620 A1 CA 2437620A1
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Prior art keywords
contextual models
contextual
hierarchy
text
hierarchichal
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CA002437620A
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French (fr)
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CA2437620C (en
Inventor
Mark Edward Epstein
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International Business Machines Corp
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International Business Machines Corporation
Mark Edward Epstein
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/26—Speech to text systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/08—Speech classification or search
    • G10L15/18—Speech classification or search using natural language modelling
    • G10L15/183—Speech classification or search using natural language modelling using context dependencies, e.g. language models
    • G10L15/19—Grammatical context, e.g. disambiguation of the recognition hypotheses based on word sequence rules
    • G10L15/197—Probabilistic grammars, e.g. word n-grams
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/08—Speech classification or search
    • G10L15/18—Speech classification or search using natural language modelling
    • G10L15/183—Speech classification or search using natural language modelling using context dependencies, e.g. language models

Abstract

The invention disclosed herein concerns a method of converting speech to text using a hierarchy of contextual models. The hierarchy of contextual models can be statistically smoothed into a language model. The method can include processing text with a plurality of contextual models. Each one of the plurality of contextual models can correspond to a node in a hierarchy of the plurality of contextual models. Also included can be identifying at least one of the contextual models relating to the text and processing subsequent user spoken utterances with the identified at least one contextual model.
CA002437620A 2001-03-01 2002-02-28 Hierarchichal language models Expired - Fee Related CA2437620C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/798,655 US6754626B2 (en) 2001-03-01 2001-03-01 Creating a hierarchical tree of language models for a dialog system based on prompt and dialog context
US09/798,655 2001-03-01
PCT/GB2002/000889 WO2002071391A2 (en) 2001-03-01 2002-02-28 Hierarchichal language models

Publications (2)

Publication Number Publication Date
CA2437620A1 true CA2437620A1 (en) 2002-09-12
CA2437620C CA2437620C (en) 2005-04-12

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CA002437620A Expired - Fee Related CA2437620C (en) 2001-03-01 2002-02-28 Hierarchichal language models

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US (1) US6754626B2 (en)
EP (1) EP1366490B1 (en)
JP (1) JP3940363B2 (en)
KR (1) KR100563365B1 (en)
CN (1) CN1256714C (en)
AT (1) ATE276568T1 (en)
CA (1) CA2437620C (en)
DE (1) DE60201262T2 (en)
ES (1) ES2227421T3 (en)
WO (1) WO2002071391A2 (en)

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Publication number Publication date
CA2437620C (en) 2005-04-12
JP2004523004A (en) 2004-07-29
CN1256714C (en) 2006-05-17
WO2002071391A2 (en) 2002-09-12
CN1535460A (en) 2004-10-06
ATE276568T1 (en) 2004-10-15
DE60201262D1 (en) 2004-10-21
ES2227421T3 (en) 2005-04-01
EP1366490B1 (en) 2004-09-15
KR100563365B1 (en) 2006-03-22
JP3940363B2 (en) 2007-07-04
EP1366490A2 (en) 2003-12-03
WO2002071391A3 (en) 2002-11-21
US6754626B2 (en) 2004-06-22
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KR20030076686A (en) 2003-09-26
US20020123891A1 (en) 2002-09-05

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