System and method for generating challenge utterances for speaker verification
First Claim
1. A method comprising:
- collecting user speech uttered while a user is using a speech service associated with a multi-platform automatic speech recognition engine to yield collected user speech;
identifying speech of interest from the collected user speech, wherein the speech of interest has high speaker discriminatory ability;
identifying, from the speech of interest, voice characteristics for the user, the voice characteristics comprising one or more of speaker-distinctive phonemes, phoneme clusters, and prosody, to yield identified voice characteristics;
creating a user profile for the user by flagging the identified voice characteristics in the user profile as important for generating challenge sentences to yield flagged voice characteristics;
generating, by a system comprising a processor and based on the flagged voice characteristics in the user profile, a random challenge sentence according to a challenge grammar; and
prompting the user to utter the random challenge sentence to verify an identity of the user.
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Accused Products
Abstract
Disclosed herein are systems, methods, and non-transitory computer-readable storage media relating to speaker verification. In one aspect, a system receives a first user identity from a second user, and, based on the identity, accesses voice characteristics. The system randomly generates a challenge sentence according to a rule and/or grammar, based on the voice characteristics, and prompts the second user to speak the challenge sentence. The system verifies that the second user is the first user if the spoken challenge sentence matches the voice characteristics. In an enrollment aspect, the system constructs an enrollment phrase that covers a minimum threshold of unique speech sounds based on speaker-distinctive phonemes, phoneme clusters, and prosody. Then user utters the enrollment phrase and extracts voice characteristics for the user from the uttered enrollment phrase. The system generates a user profile, based on the voice characteristics, for generating random challenge sentences according to a grammar.
43 Citations
16 Claims
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1. A method comprising:
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collecting user speech uttered while a user is using a speech service associated with a multi-platform automatic speech recognition engine to yield collected user speech; identifying speech of interest from the collected user speech, wherein the speech of interest has high speaker discriminatory ability; identifying, from the speech of interest, voice characteristics for the user, the voice characteristics comprising one or more of speaker-distinctive phonemes, phoneme clusters, and prosody, to yield identified voice characteristics; creating a user profile for the user by flagging the identified voice characteristics in the user profile as important for generating challenge sentences to yield flagged voice characteristics; generating, by a system comprising a processor and based on the flagged voice characteristics in the user profile, a random challenge sentence according to a challenge grammar; and prompting the user to utter the random challenge sentence to verify an identity of the user. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable storage medium storing instructions which, responsive to being executed by a processor, cause the processor to perform operations comprising:
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collecting user speech uttered while a user is using a speech service associated with a multi-platform automatic speech recognition engine to yield collected user speech; identifying speech of interest from the collected user speech, wherein the speech of interest has high speaker discriminatory ability; identifying, from the speech of interest, voice characteristics for the user, the voice characteristics comprising one or more of speaker-distinctive phonemes, phoneme clusters, and prosody, to yield identified voice characteristics; creating a user profile for the user by flagging the identified voice characteristics in the user profile as important for generating challenge sentences to yield flagged voice characteristics; generating, based on the flagged voice characteristics of interest in the user profile, a random challenge sentence according to a challenge grammar; and prompting the user to utter the random challenge sentence to verify an identity of the user. - View Dependent Claims (8, 9)
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10. A system comprising:
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a processor; and a computer-readable storage medium having instructions stored which, responsive to being executed by the processor, result in the processor performing operations comprising; collecting user speech uttered while a user is using a speech service associated with a multi-platform automatic speech recognition engine to yield collected user speech; identifying speech of interest from the collected user speech, wherein the speech of interest has high speaker discriminatory ability; identifying, from the speech of interest, voice characteristics for the user, the voice characteristics comprising one or more of speaker-distinctive phonemes, phoneme clusters, and prosody, to yield identified voice characteristics; creating a user profile for the user by flagging the identified voice characteristics in the user profile as important for generating challenge sentences to yield flagged voice characteristics; generating, based on the flagged voice characteristics in the user profile, a random challenge sentence according to a challenge grammar; and prompting the user to utter the random challenge sentence to verify an identity of the user. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification