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US5528731A
Expired / Lapsed
US
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Method of accommodating for carbon/electret telephone set variability in automatic speaker verification
Assignee: Avaya Inc
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Filing: 1993-11-19
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Granted: 1996-06-18
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Expires: 2013-11-19
Abstract
Abstract In a speaker verification system, a method of compensating for differences in speech samples obtained during registration and those obtained during verification due to the use of different types of microphones is provided by filtering at least one of the samples such that the similarities of the two samples are increased. The filtered sample is used within the speaker verification matching process. A two-way comparison is disclosed in which both a verification speech sample and a reference sample are filtered with nonlinear microphone characteristics such as carbon microphone characteristics. A four-way comparison is also disclosed in which patterns produced from unfiltered verification and reference samples and patterns produced from the filtered verification and reference samples are compared to identify a match. A score is determined for each comparison. The comparison having the best score is used to determine if a match has occurred.
Inventors
- 👤 Richard M. Sachs
- 👤 Max S. Schoeffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:30
CPC Classifications
G; G10; G10L; G10L17/00; G10L17/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
A method of processing speech samples for use in verifying a speaker, the method comprising the steps of: receiving speech samples generated by different types of microphones; filtering at least one of said speech samples generated by one of the microphone types with the characteristics of another one of the microphone types, wherein the characteristics of said another one of the microphone types are non-linear; and producing patterns from said filtered speech samples that can be used to verify the speaker.
Claim 2
Independent Claim
81 words
A method of processing speech samples for use in verifying a speaker, the method comprising the steps of: receiving speech samples generated by different types of microphones; filtering at least one of said speech samples generated by one of the microphone types with the characteristics of another one of the microphone types, wherein the characteristics of said another one of the microphone types are non-linear; and producing patterns from said filtered speech samples that can be used to verify the speaker.
Claim 3
Dependent Claim
14 words
The method according to claim 1 wherein said speech samples include reference speech samples.
Claim 4
Dependent Claim
14 words
The method according to claim 1 wherein said speech samples include verification speech samples.
Claim 5
Dependent Claim
18 words
The method according to claim 1 wherein said another one of the microphone types is a carbon microphone.
Claim 6
Dependent Claim
16 words
The method according to claim 1 wherein the characteristics of said one microphone type are linear.
Claim 7
Dependent Claim
13 words
The method according to claim 5 wherein said microphone is an electret microphone.
Claim 8
Independent Claim
93 words
A method of verifying a speaker, the method comprising the steps of: receiving a speech sample provided for verification from one type of microphone; filtering the verification speech sample with the characteristics of another microphone type, wherein the characteristics of said another microphone type are non-linear; producing a verification pattern from the filtered verification speech sample; comparing the verification pattern to a generated reference pattern produced from a reference speech sample provided during a registration session; and verifying the identity of the speaker as a function of the reference pattern and verification pattern.
Claim 9
Independent Claim
93 words
A method of verifying a speaker, the method comprising the steps of: receiving a speech sample provided for verification from one type of microphone; filtering the verification speech sample with the characteristics of another microphone type, wherein the characteristics of said another microphone type are non-linear; producing a verification pattern from the filtered verification speech sample; comparing the verification pattern to a generated reference pattern produced from a reference speech sample provided during a registration session; and verifying the identity of the speaker as a function of the reference pattern and verification pattern.
Claim 10
Dependent Claim
27 words
The method according to claim 7 wherein said generated reference pattern is produced by filtering the reference speech sample with the characteristics of said another microphone type.
Claim 11
Dependent Claim
77 words
The method according to claim 7 wherein said generated reference pattern comprises a filtered reference pattern produced by filtering the reference speech sample with the characteristics of said another microphone type, the method further comprising the steps of: producing an unfiltered verification pattern from a verification speech sample which has not been filtered; producing an unfiltered reference pattern from a reference speech sample which has not been filtered; and comparing each verification pattern with each reference pattern.
Claim 12
Dependent Claim
43 words
The method according to claim 9 wherein said determining step further comprises the steps of: calculating a score representing the similarity of the verification pattern and the reference pattern for each comparison; determining which comparison has the best score based on predetermined criteria.
Claim 13
Dependent Claim
15 words
A method according to claim 7 wherein said another microphone type is a carbon microphone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-18 | 1999-12-18 | 2000-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-18 | 2003-12-18 | 2004-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-18 | 2007-12-18 | 2008-06-18 | $7700.00 | Window Closed / Lapsed |