Method of accessing a dial-up service

Patent metadata

Field	Value
Publication number	US-9978373-B2
Application number	US-201615185298-A
Country	US
Kind code	B2
Filing date	Jun 17, 2016
Priority date	May 27, 1997
Publication date	May 22, 2018
Grant date	May 22, 2018

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:
comparing, via a processor, a feature coefficient generated from a speech signal to a user-specific codebook associated with a user who provided the speech signal, to yield a similarity value, wherein the user-specific codebook comprises codes that are formed from cepstrum coefficients generated from utterances spoken by the user;
when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals; and
adding the feature coefficient to the user-specific codebook; and

performing a speaker verification process of the user based on the database of reference speech signals and the user-specific codebook.

2. The method of claim 1 , wherein the user-specific codebook utilizes utterances from both the user and a group of non-users.

3. 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.

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

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:
comparing a feature coefficient generated from a speech signal to a user-specific codebook associated with a user who provided the speech signal, to yield a similarity value, wherein the user-specific codebook comprises codes that are formed from cepstrum coefficients generated from utterances spoken by the user;

when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals; and
adding the feature coefficient to the user-specific codebook; and

performing a speaker verification process of the user based on the database of reference speech signals and the user-specific codebook.

9. The system of claim 8 , wherein the user-specific codebook utilizes utterances from both the user and a group of non-users.

10. 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.

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

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 non-transitory computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising:
comparing a feature coefficient generated from a speech signal to a user-specific codebook associated with a user who provided the speech signal, to yield a similarity value, wherein the user-specific codebook comprises codes that are formed from cepstrum coefficients generated from utterances spoken by the user;
when the similarity value meets a threshold:
adding the speech signal to a database of reference speech signals; and
adding the feature coefficient to the user-specific codebook; and

performing a speaker verification process of the user based on the database of reference speech signals and the user-specific codebook.

16. The non-transitory computer-readable storage device of claim 15 , wherein the user-specific codebook utilizes utterances from both the user and a group of non-users.

17. The non-transitory 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.

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

Assignees

• Nuance Communications Inc

Inventors

• Bossemeyer Jr Robert Wesley

Classifications

• G10L17/04 Primary

  Training, enrolment or model building · CPC title

• H04M3/493

  Interactive information services, e.g. directory enquiries {; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals} · CPC title

• H04M3/42204

  Arrangements at the exchange for service or number selection by voice (at the terminal H04M1/27) · CPC title

• G10L15/10

  using distance or distortion measures between unknown speech and reference templates · CPC title

• G10L2015/0638

  Interactive procedures · CPC title