CONTEXT-BASED GRAMMARS FOR AUTOMATED SPEECH RECOGNITION

• US 20070294084A1
• Filed: 06/13/2006
• Published: 12/20/2007
• Est. Priority Date: 06/13/2006
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Nuance Communications, Inc. (Microsoft Corporation)
• Inventors: Cross, Charles W., Jania, Frank L.
• Granted Patent: US 8,332,218 B2
• Time in Patent Office: Days
• US Class Current: 704/251
• CPC Class Codes: G10L 15/183 using context dependencies, e.g. language models
• CPC Class Codes: G10L 15/19 Grammatical context, e.g. disambiguation of the recognition hypotheses based on word sequence rules
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue
• CPC Class Codes: G10L 2015/228 of application context

Abstract

Methods, apparatus, and computer program products for providing a context-based grammar for automatic speech recognition, including creating by a multimodal application a context, the context comprising words associated with user activity in the multimodal application, and supplementing by the multimodal application a grammar for automatic speech recognition in dependence upon the context.

Claims

1. A method of providing a context-based grammar for automatic speech recognition, the method comprising:

creating by a multimodal application a context, the context comprising words associated with user activity in the multimodal application; and

supplementing by the multimodal application a grammar for automatic speech recognition in dependence upon the context.

2. The method of claim 1 wherein creating a context further comprises inserting in the context one or more words from a grammar from a previously visited multimodal web page.

3. The method of claim 1 wherein creating a context further comprises maintaining a history of words from previously visited web pages and selecting words for the context from the history.

4. The method of claim 1 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a frequent values list for words in the history, and selecting words for the context from the history in dependence upon the frequent values list.

5. The method of claim 1 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of most recently used words in the history, and selecting words for the context from the history in dependence upon the list of most recently used words.

6. The method of claim 1 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of words from the history used during a predetermined period of time, and selecting words for the context from the history in dependence upon the list of words from the history used during a predetermined period of time.

7. A system for providing a context-based grammar for automatic speech recognition, the system comprising a computer processor and a computer memory operatively coupled to the computer processor, the computer memory having disposed within it computer program instructions capable of:

creating by a multimodal application a context, the context comprising words associated with user activity in the multimodal application; and

supplementing by the multimodal application a grammar for automatic speech recognition in dependence upon the context.

8. The system of claim 7 wherein creating a context further comprises inserting in the context one or more words from a grammar from a previously visited multimodal web page.

9. The system of claim 7 wherein creating a context further comprises maintaining a history of words from previously visited web pages and selecting words for the context from the history.

10. The system of claim 7 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a frequent values list for words in the history, and selecting words for the context from the history in dependence upon the frequent values list.

11. The system of claim 7 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of most recently used words in the history, and selecting words for the context from the history in dependence upon the list of most recently used words.

12. The system of claim 7 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of words from the history used during a predetermined period of time, and selecting words for the context from the history in dependence upon the list of words from the history used during a predetermined period of time.

13. A computer program product for providing a context-based grammar for automatic speech recognition, the computer program product disposed upon a signal bearing medium, the computer program product comprising computer program instructions capable of:

creating by a multimodal application a context, the context comprising words associated with user activity in the multimodal application; and

supplementing by the multimodal application a grammar for automatic speech recognition in dependence upon the context.

14. The computer program product of claim 13 wherein the signal bearing medium comprises a recordable medium.

15. The computer program product of claim 13 wherein the signal bearing medium comprises a transmission medium.

16. The computer program product of claim 13 wherein creating a context further comprises inserting in the context one or more words from a grammar from a previously visited multimodal web page.

17. The computer program product of claim 13 wherein creating a context further comprises maintaining a history of words from previously visited web pages and selecting words for the context from the history.

18. The computer program product of claim 13 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a frequent values list for words in the history, and selecting words for the context from the history in dependence upon the frequent values list.

19. The computer program product of claim 13 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of most recently used words in the history, and selecting words for the context from the history in dependence upon the list of most recently used words.

20. The computer program product of claim 13 wherein creating a context further comprises maintaining a history of words from previously visited web pages, generating a list of words from the history used during a predetermined period of time, and selecting words for the context from the history in dependence upon the list of words from the history used during a predetermined period of time.