Method of accessing a dial-up service

• US 8,731,922 B2
• Filed: 04/30/2013
• Issued: 05/20/2014
• Est. Priority Date: 05/27/1997
• Status: Expired due to Fees

• Current Assignee: Nuance Communications, Inc. (Microsoft Corporation)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Bossemeyer, Jr., Robert Wesley
• Primary Examiner(s): AZAD, ABUL K
• Application Number:
  US13/873,638
• Publication Number:
  US 20130238323A1
• Time in Patent Office: 385 Days
• Field of Search: 704230-257, 704/273
• US Class Current: 704/239
• CPC Class Codes: G10L 15/08 Speech classification or search
• CPC Class Codes: G10L 15/10 using distance or distortion measures between unknown speech and reference templates
• CPC Class Codes: G10L 17/00 Speaker identification or verification techniques
• CPC Class Codes: G10L 17/04 Training, enrolment or model building
• CPC Class Codes: G10L 17/24 the user being prompted to utter a password or a predefined phrase
• CPC Class Codes: G10L 2015/0638 Interactive procedures
• CPC Class Codes: G10L 25/12 the extracted parameters being prediction coefficients
• CPC Class Codes: G10L 25/24 the extracted parameters being the cepstrum
• CPC Class Codes: H04M 2201/40 using speech recognition speech recognition per se G10L15/00
• CPC Class Codes: H04M 3/38 Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections queuing arrangements H04Q3/64
• CPC Class Codes: H04M 3/382 using authorisation codes or passwords
• CPC Class Codes: H04M 3/385 using speech signals
• 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

Abstract

A method of accessing a dial-up service is disclosed. An example method of providing access to a service includes receiving a first speech signal from a user to form a first utterance; recognizing the first utterance using speaker independent speaker recognition; requesting the user to enter a personal identification number; and when the personal identification number is valid, receiving a second speech signal to form a second utterance and providing access to the service.

Claims

1. A method comprising:

generating, via a processor, feature coefficients based on a speech signal received from a user;

comparing the feature coefficients to a codebook, to yield a similarity value, wherein the codebook is associated with a database of reference speech signals; and

when the similarity value meets a threshold;

providing the user access to a service;

adding the speech signal to the database of reference speech signals; and

adding the feature coefficients to the codebook.

2. The method of claim 1, further comprising:

mixing the speech signal with a second speech signal, to yield a mixed signal; and

adding the mixed signal to the database of reference speech signals.

3. The method of claim 2, wherein the speech signal and the second speech signal are received from the user.

4. The method of claim 1, wherein the feature coefficients are one of cepstrum coefficients and linear predictive coding coefficients.

5. The method of claim 1, wherein the threshold is determined using a Chi-squared detector.

6. The method of claim 1, further comprising:

when the similarity value does not meet the threshold, requesting the user to repeat the speech signal.

7. The method of claim 1, further comprising verifying the user based on the speech signal using a speaker verification system when the user has used the service previously.

8. A system comprising:

a processor; and

a computer-readable storage medium having instructions stored which, when executed by the processor, result in the processor performing operations comprising;

generating, via a processor, feature coefficients based on a speech signal received from a user;

comparing the feature coefficients to a codebook, to yield a similarity value, wherein the codebook is associated with a database of reference speech signals; and

when the similarity value meets a threshold;

providing the user access to a service;

adding the speech signal to the database of reference speech signals; and

adding the feature coefficients to the codebook.

9. The system of claim 8, the computer-readable storage medium having additional instructions stored which result in the operations further comprising:

mixing the speech signal with a second speech signal, to yield a mixed signal; and

adding the mixed signal to the database of reference speech signals.

10. The system of claim 9, wherein the speech signal and the second speech signal are received from the user.

11. The system of claim 8, wherein the feature coefficients are one of cepstrum coefficients and linear predictive coding coefficients.

12. The system of claim 8, wherein the threshold is determined using a Chi-squared detector.

13. The system of claim 8, the computer-readable storage medium having additional instructions stored which result in the operations further comprising:

when the similarity value does not meet the threshold, requesting the user to repeat the speech signal.

14. The system of claim 8, the computer-readable storage medium having additional instructions stored which result in the operations further comprising:

verifying the user based on the speech signal using a speaker verification system when the user has used the service previously.

15. A computer-readable storage device having instructions stored which, when executed by a computing device, result in the computing device performing operations comprising:

generating, via a processor, feature coefficients based on a speech signal received from a user;

comparing the feature coefficients to a codebook, to yield a similarity value, wherein the codebook is associated with a database of reference speech signals; and

when the similarity value meets a threshold;

providing the user access to a service;

adding the speech signal to the database of reference speech signals; and

adding the feature coefficients to the codebook.

16. The computer-readable storage device of claim 15, the computer-readable storage medium having additional instructions stored which result in the operations further comprising:

mixing the speech signal with a second speech signal, to yield a mixed signal; and

adding the mixed signal to the database of reference speech signals.

17. The computer-readable storage device of claim 16, wherein the speech signal and the second speech signal are received from the user.

18. The computer-readable storage device of claim 15, wherein the feature coefficients are one of cepstrum coefficients and linear predictive coding coefficients.

19. The computer-readable storage device of claim 15, wherein the threshold is determined using a Chi-squared detector.

20. The computer-readable storage device of claim 15, the computer-readable storage device having additional instructions stored which result in the operations further comprising:

when the similarity value does not meet the threshold, requesting the user to repeat the speech signal.