SPEECH RECOGNITION TUNING TOOL

• US 20110022386A1
• Filed: 07/22/2009
• Published: 01/27/2011
• Est. Priority Date: 07/22/2009
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Lindborg, Jeff B., Maas, Michael T., Gatzke, Alan D., Bloom, Ryan L.
• Granted Patent: US 9,183,834 B2
• Time in Patent Office: Days
• US Class Current: 704/235
• CPC Class Codes: G10L 15/06 Creation of reference templates; Training of speech recognition systems, e.g. adaptation to the characteristics of the speaker's voice G10L15/14 takes precedence
• CPC Class Codes: G10L 15/26 Speech to text systems G10L15/08 takes precedence
• CPC Class Codes: G10L 2015/0631 Creating reference templates; Clustering
• CPC Class Codes: H04M 2201/40 using speech recognition
• CPC Class Codes: H04M 3/493 Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
• CPC Class Codes: H04M 3/533 Voice mail systems

Abstract

Systems and methods for tuning a dictionary of a speech recognition system includes accessing a voice mail record of a user, accessing a recorded audio file of a name of the user in the voice mail record spoken by the user, providing the audio file to a speech recognition system, processing the audio file in the speech recognition system and obtaining a text result, determining whether a confidence score of the text result is below a predetermined threshold, and adding, at least, the name of the user to a list of low confidence names. Alternate spellings for the low confidence names can then be added to the dictionary.

Claims

1. A method, comprising:

accessing a voice mail record of a user;

accessing a recorded audio file of a name of the user in the voice mail record spoken by the user;

providing the audio file to a speech recognition system;

processing the audio file in the speech recognition system and obtaining a text result;

determining whether a confidence score of the text result is below a predetermined threshold; and

adding, at least, the name of the user to a list of low confidence names when the confidence score is below the predetermined threshold.

2. The method of claim 1, further comprising obtaining a plurality of text results for each name in list of low confidence names.

3. The method of claim 2, further comprising obtaining an n-best list of low confidence names.

4. The method of claim 1, further comprising adding a link to the audio file to the list of low confidence names.

5. The method of claim 1, further comprising listing the confidence score along with the name of the user in the list of low confidence names.

6. The method of claim 1, further comprising repeating the method when a number of new users reaches a predetermined threshold.

7. The method of claim 1, further comprising receiving a request to play the audio file, the request having been initiated from the list of low confidence names.

8. The method of claim 7, further comprising storing an alternate spelling of the name of the user, the storing being initiated from an administrator'"'"'s user interface.

9. The method of claim 8, further comprising updating a dictionary of the speech recognition system consistent with the alternate spelling.

10. The method of claim 1, further comprising configuring the predetermined threshold.

11. The method of claim 1, further comprising repeating the method for each name in a directory of names.

12. An apparatus, comprising:

a speech recognition tuning tool configured to be in communication with a voice mail system and a speech to text converter, the speech recognition tuning tool having a controller,

wherein the controller is configured to;

access an audio file of a name of the user in the voice mail system;

provide the audio file to the speech to text converter;

determine whether a confidence score of a text result from the speech to text converter is below a predetermined threshold;

add, at least, the name of the user to a list of low confidence names when the confidence score is below the predetermined threshold; and

receive an alternate spelling for the name of the user.

13. The apparatus of claim 12, wherein the controller is configured to receive the alternate spelling via a user interface.

14. The apparatus of claim 12, wherein the controller is configured to save the alternate spelling in a dictionary.

15. The apparatus of claim 12, wherein the controller is configured to present to a user a link or path to the audio file.

16. The apparatus of claim 12, wherein the controller is configured to cause the audio file to be played.

17. Logic encoded in one or more tangible media for execution and when executed operable to:

access an audio file of a name of the user in a voice mail system;

provide the audio file to a speech to text converter;

determine whether a confidence score of a text result from the speech to text converter is below a predetermined threshold;

add, at least, the name of the user to a list of low confidence names when the confidence score is below the predetermined threshold; and

receive an alternate spelling for the name of the user.

18. The logic of claim 17, wherein the logic is further operable to receive the alternate spelling via a user interface.

19. The logic of claim 17, wherein the logic is further operable to save the alternate spelling in a dictionary.

20. The logic of claim 17, wherein the logic is further operable to present to a user a link or path to the audio file along with the name in the list of low confidence names.