CA2473172A1 - Information retrieval and speech recognition based on language models - Google Patents
Information retrieval and speech recognition based on language modelsInfo
- Publication number
- CA2473172A1 CA2473172A1 CA002473172A CA2473172A CA2473172A1 CA 2473172 A1 CA2473172 A1 CA 2473172A1 CA 002473172 A CA002473172 A CA 002473172A CA 2473172 A CA2473172 A CA 2473172A CA 2473172 A1 CA2473172 A1 CA 2473172A1
- Authority
- CA
- Canada
- Prior art keywords
- data store
- information
- language model
- speech recognition
- language models
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Document Processing Apparatus (AREA)
Abstract
A language model is used in a speech recognition system which has access to a first, smaller data store and a second, larger data store. The language model is adapted by formulating an information retrieval query based on information contained in the first data store and querying the second data store. Information retrieved from the second data store is used in adapting the language model. Also, language models are used in retrieving information from the second data store. Language models are built based on information in the first data store, and based on information in the second data store. The perplexity of a document in the second data store is determined, given the first language model, and given the second language model. Relevancy of the document is determined based upon the first and second perplexities. Documents are retrieved which have a relevancy measure that exceeds a threshold level.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/050,286 US6418431B1 (en) | 1998-03-30 | 1998-03-30 | Information retrieval and speech recognition based on language models |
US09/050,286 | 1998-03-30 | ||
CA002321112A CA2321112C (en) | 1998-03-30 | 1999-02-09 | Information retrieval and speech recognition based on language models |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002321112A Division CA2321112C (en) | 1998-03-30 | 1999-02-09 | Information retrieval and speech recognition based on language models |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2473172A1 true CA2473172A1 (en) | 1999-10-07 |
CA2473172C CA2473172C (en) | 2005-10-18 |
Family
ID=32909193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002473172A Expired - Fee Related CA2473172C (en) | 1998-03-30 | 1999-02-09 | Information retrieval and speech recognition based on language models |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2473172C (en) |
-
1999
- 1999-02-09 CA CA002473172A patent/CA2473172C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2473172C (en) | 2005-10-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20190211 |