User authentication method and apparatus

An electronic apparatus comprising:

• a microphone;
• a memory;
• and
• at least one processor,
• wherein the at least one processor is configured to:
• obtain an input audio signal based on an utterance input of a user received through the microphone,
• distinguish, from the input audio signal, at least one audio signal of an utterance section and at least one audio signal of a non-utterance section, wherein the at least one audio signal of the utterance section is generated based on a speech of the user, and the at least one audio signal of the non-utterance section is not generated based on the speech of the user,
• generate environment information indicating an environment in which the utterance input is received,
• obtain a result of a comparison between the generated environment information and registration environment information indicating an environment in which a registration utterance input included in a previously registered registration audio signal of the user is received, wherein the registration audio signal comprises at least one audio signal of a registration utterance section generated based on a previous speech of the user,
• based on a result of the comparison between the generated environment information and registration environment information, adjust an authentication criterion for authenticating the user, and
• authenticate the user based on the adjusted authentication criterion and the input audio signal,
• wherein the at least one processor is further configured to calculate a first average energy value of the at least one audio signal of the utterance section, wherein the first average energy value is related to a distance between the user and the electronic apparatus, calculate a second average energy value of the at least one audio signal of the registration utterance input and adjust a threshold corresponding to the authentication criterion based on a result of a comparison between the first average energy value and the second average energy value.

A non-transitory computer-readable recording medium having recorded thereon a program for executing a user authentication method, the user authentication method comprising:

• obtaining an input audio signal based on an utterance input of a user;
• obtaining, from the input audio signal, at least one audio signal of an utterance section and at least one audio signal of a non-utterance section, wherein the at least one audio signal of the utterance section is generated based on a speech of a user, and the at least one audio signal of the non-utterance section is not generated based on the speech of the user;
• generating environment information indicating an environment in which the utterance input is received, based on the at least one audio signal of the non-utterance section;
• obtaining a result of a comparison between the generated environment information and registration environment information indicating an environment in which a registration utterance input included in a previously registered registration audio signal of the user is received, wherein the registration audio signal comprises at least one audio signal of a registration utterance section generated based on a previous speech of the user;
• adjusting an authentication criterion for authenticating the user based on the result the comparison between the generated environment information and registration environment information;
• and
• authenticating the user based on the adjusted authentication criterion and the input audio signal,
• wherein the adjusting of the authentication criterion further comprises:
• calculating a first average energy value of the at least one audio signal of the utterance section, wherein the first average energy value is related to a distance between the user and the electronic apparatus;
• calculating a second average energy value of the at least one audio signal of the registration utterance input;
• and
• adjusting a threshold corresponding to the authentication criterion based on a result of a comparison between the first average energy value and the second average energy value.

A user authentication method, performed by an electronic apparatus, of authenticating a user based on an utterance input, the user authentication method comprising:

• obtaining an input audio signal based on the utterance input of the user;
• obtaining, from the input audio signal, at least one audio signal of an utterance section and at least one audio signal of a non-utterance section;
• generating environment information indicating an environment in which the utterance input is received, based on the at least one audio signal of the non-utterance section;
• obtaining a result of a comparison between the generated environment information and registration environment information indicating an environment in which a registration utterance input included in a previously registered registration audio signal of the user is received;
• adjusting an authentication criterion for authenticating the user based on the result of the comparison;
• and
• authenticating the user based on the adjusted authentication criterion and the input audio signal,
• wherein the generating of the environment information comprises:
• identifying an amount of noise in the environment is input due to a distance between the user and the electronic apparatus;
• and
• generating the environment information based on the amount of noise in the environment;
• wherein the obtaining of the result of the comparison comprises comparing a first amount of noise of the environment information and a second amount of noise of the registration environment information;
• and
• wherein the adjusting of the authentication criterion comprises adjusting the authentication criterion for authenticating the user based on the result of the comparison between the first amount of noise and the second amount of noise.

An electronic apparatus comprising:

• a microphone;
• a memory;
• and
• at least one processor,
• wherein the at least one processor is configured to:
• obtain an input audio signal based on an utterance input of a user received through the microphone,
• distinguish, from the input audio signal, at least one audio signal of an utterance section and at least one audio signal of a non-utterance section,
• generate environment information indicating an environment in which the utterance input is received,
• obtain a result of a comparison between the generated environment information and registration environment information indicating an environment in which a registration utterance input included in a previously registered registration audio signal of the user is received,
• based on a result of the comparison, adjust an authentication criterion for authenticating the user, and
• authenticate the user based on the adjusted authentication criterion and the input audio signal,
• wherein the at least one processor is further configured to:
• identify an amount of noise in the environment is input due to a distance between the user and the electronic apparatus;
• generate the environment information based on the amount of noise in the environment;
• compare a first amount of noise of the environment information and a second amount of noise of the registration environment information;
• and
• adjust the authentication criterion for authenticating the user based on the result of the comparison between the first amount of noise and the second amount of noise.