Noise cancelling apparatus, noise cancelling method, and program
AssigneeNTT, Inc.
InventorsShin Murata, Yohei Wakisaka, Noriyoshi Kamado, Hiroaki Ito
Life of this patent
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Abstract
A noise suppression technique which allows a user to recognize that a specific event occurs when the event that the user needs to be aware of occurs even during a process of suppressing noise around the user is provided. When the noise around the user includes a sound originating from a predetermined event (hereinafter referred to as “event sound”), a noise suppression device allows a user to recognize that the event occurs.
Claims3
A noise suppression device, in which, when noise around a user includes an event sound originating from a predetermined event, the user is made aware that the predetermined event occurs, comprising:
- a situation identification result generation circuitry which generates a situation identification result indicating the likelihood that the predetermined event occurs around the user from sensor data acquired using a sensor;
- an adjustment information generation circuitry which generates adjustment information regarding a relative magnitude of an event sound erasure sound for erasing the event sound with respect to an erasure sound for erasing the noise determined in accordance with the value of the situation identification result;
- and
- an erasure sound signal generation circuitry which generates an erasure sound signal for erasing the noise from a user's listening sound signal acquired using one or more microphones and the adjustment information, wherein
- a value of the situation identification result is a value indicating a degree of correlation between the noise and a reference sound for determining the event sound originating from the predetermined event, and
- the adjustment information is information indicating that a proportion of excluding the event sound erasure sound from the erasure sound increases as the value of the situation identification result increases.
A noise suppression method, in which, when noise around a user includes an event sound originating from a predetermined event, the user is made aware that the predetermined event occurs, comprising:
- generating a situation identification result indicating the likelihood that the predetermined event occurs around the user from sensor data acquired using a sensor;
- generating adjustment information regarding a relative magnitude of an event sound erasure sound for erasing the event sound with respect to an erasure sound for erasing the noise determined in accordance with the value of the situation identification result;
- and
- generating an erasure sound signal for erasing the noise from a user's listening sound signal acquired using one or more microphones and the adjustment information, wherein
- a value of the situation identification result is a value indicating a degree of correlation between the noise and a reference sound for determining the event sound originating from the predetermined event, and
- the adjustment information is information indicating that a proportion of excluding the event sound erasure sound from the erasure sound increases as the value of the situation identification result increases.
Dependencies are inferred from the claim text.