Method of accessing a dial-up service

Patent metadata

Field	Value
Publication number	US-9373325-B2
Application number	US-201414268078-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 27, 1997
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

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.

First claim

What is claimed is:

1. A method comprising:
generating, via a processor, a feature coefficient based on a speech signal from a user;
comparing the feature coefficient to a user-specific codebook associated with the user, to yield a similarity value, wherein the user-specific codebook utilizes utterances from both the user and a group of non-users; and
when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals associated with the user-specific codebook; and
adding the feature coefficient to the user-specific codebook.

2. The method of claim 1 , further comprising:
mixing the speech signal with a second speech signal, to yield a mixed speech signal; and
adding the mixed speech 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 coefficient is one of a cepstrum coefficient and a linear predictive coding coefficient.

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 speech signal be repeated.

7. The method of claim 1 , further comprising verifying an identity of the user based on the similarity value.

8. A system comprising:
a processor; and
a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor to perform operations comprising:
generating a feature coefficient based on a speech signal from a user;
comparing the feature coefficient to a user-specific codebook associated with the user, to yield a similarity value, wherein the user-specific codebook utilizes utterances from both the user and a group of non-users; and
when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals associated with the user-specific codebook; and
adding the feature coefficient to the user-specific codebook.

9. The system of claim 8 , the computer-readable storage medium having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising:
mixing the speech signal with a second speech signal, to yield a mixed speech signal; and
adding the mixed speech 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 coefficient is one of a cepstrum coefficient and a linear predictive coding coefficient.

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, when executed by the processor, cause the processor to perform operations comprising:
when the similarity value does not meet the threshold, requesting the speech signal be repeated.

14. The system of claim 8 , the computer-readable storage medium having additional instructions stored which result in operations comprising verifying an identity of the user based on the similarity value.

15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising:
generating a feature coefficient based on a speech signal from a user;
comparing the feature coefficient to a user-specific codebook associated with the user, to yield a similarity value, wherein the user-specific codebook utilizes utterances from both the user and a group of non-users; and
when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals associated with the user-specific codebook; and
adding the feature coefficient to the user-specific codebook.

16. The computer-readable storage device of claim 15 , having additional instructions stored which, when executed by the computing device, cause the computing device to perform operations comprising:
mixing the speech signal with a second speech signal, to yield a mixed speech signal; and
adding the mixed speech 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 coefficient is one of a cepstrum coefficient and a linear predictive coding coefficient.

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 , having additional instructions stored which, when executed by the computing device, cause the computing device to perform operations comprising:
when the similarity value does not meet the threshold, requesting the speech signal be repeated.

Assignees

• At & T Ip I Lp

Inventors

• Bossemeyer Jr Robert Wesley

Classifications

• H04M3/382

  using authorisation codes or passwords · CPC title

• G10L17/24

  the user being prompted to utter a password or a predefined phrase · CPC title

• G10L2015/0638

  Interactive procedures · CPC title

• G10L15/08 Primary

  Speech classification or search · CPC title

• G10L17/005

  Physics · mapped topic