Method of accessing a dial-up service

• US 8,433,569 B2
• Filed: 10/03/2011
• Issued: 04/30/2013
• 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:
  US13/251,634
• Publication Number:
  US 20120029922A1
• Time in Patent Office: 575 Days
• Field of Search: 704231-257, 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:

receiving a first speech signal and a second speech signal;

generating, via a processor, feature coefficients based at least in part on the first speech signal and the second speech signal;

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

if the utterance similarity value is above a threshold, providing access to a service and adding at least one of the first speech signal and the second speech signal to the database of reference signals.

2. The method of claim 1, wherein the first speech signal and the second speech signal are received from a single user.

3. The method of claim 1, further comprising:

combining the first speech signal and the second speech signal to form a mixed signal; and

adding the mixed signal to the database of reference signals.

4. The method of claim 1, wherein the feature coefficients are at least 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, if the utterance similarity value is below the threshold, requesting a user to repeat at least one of the first speech signal and the second speech signal.

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

8. A system comprising:

a processor; and

a non-transitory computer-readable storage medium having stored therein instructions which, when executed by the processor, cause the processor to perform a method comprising;

receiving a first speech signal and a second speech signal;

generating feature coefficients based at least in part on the first speech signal and the second speech signal;

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

if the utterance similarity value is above a threshold, providing access to a service and adding at least one of the first speech signal and the second speech signal to the database of reference signals.

9. The system of claim 8, wherein the first speech signal and the second speech signal are received from a single user.

10. The system of claim 8, the non-transitory computer-readable storage medium storing further instructions which, when executed by the processor, cause the processor to perform a method further comprising:

combining the first speech signal and the second speech signal to form a mixed signal; and

adding the mixed signal to the database of reference signals.

11. The system of claim 8, wherein the feature coefficients are at least 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 non-transitory computer-readable storage medium storing further instructions which, when executed by the processor, cause the processor to perform a method further comprising, if the utterance similarity value is below the threshold, requesting a user to repeat at least one of the first speech signal and the second speech signal.

14. The system of claim 8, the non-transitory computer-readable storage medium storing further instructions which, when executed by the processor, cause the processor to perform a_method further comprising verifying a user based on the first speech signal using a speaker verification system when the user has used the service previously.

15. A non-transitory computer-readable storage medium having stored therein instructions which, when executed by a computing device, cause the computing device to perform a method comprising:

receiving a first speech signal and a second speech signal;

generating feature coefficients based at least in part on the first speech signal and the second speech signal;

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

if the utterance similarity value is above a threshold, providing access to a service and adding at least one of the first speech signal and the second speech signal to the database of reference signals.

16. The non-transitory computer-readable storage medium of claim 15, wherein the first speech signal and the second speech signal are received from a single user.

17. The non-transitory computer-readable storage medium of claim 15, the instructions which, when executed by the computing device, cause the computing device to perform a method further comprising:

combining the first speech signal and the second speech signal to form a mixed signal; and

adding the mixed signal to the database of reference signals.

18. The non-transitory computer-readable storage medium of claim 15, wherein the feature coefficients are at least one of cepstrum coefficients and linear predictive coding coefficients.

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

20. The non-transitory computer-readable storage medium of claim 15, the instructions which, when executed by the computing device, cause the computing device to perform a method further comprising, if the utterance similarity value is below the threshold, requesting a user to repeat at least one of the first speech signal and the second speech signal.