Patent ID: 9135924
Filing Date: 2015-09-15
Classification: G10L

Abstract:
1. A noise suppressing device for suppressing a noise component included in a sound, comprising: at least two sound receiving parts receiving sounds from a plurality of directions containing a sound from a direction of a given sound source and converting the sounds to digital sound signals in a time domain, respectively; an estimating part acquiring direction information on a direction of the given sound source, determining a signal from a direction other than the direction of the given sound source among the digital sound signals converted by the at least two sound receiving parts based upon the acquired direction information and estimating an ambient noise level contained in the digital sound signal based on the determined signal from the direction other than the direction of the given sound source; a controlling part acquiring, in accordance with the estimated ambient noise level, a control value of a suppression amount for controlling a range of a direction of the digital sound signals, which are converted by the at least two sound receiving parts, to be suppressed, such that the suppression amount is small when the ambient noise level is low and the suppression amount is large when the ambient noise level is high; a suppressing part suppressing a signal from a direction other than the direction of the given sound source by use of the ambient noise level and the control value; and an outputting part outputting a signal in which the signal from the direction other than the direction of the given sound source is suppressed, wherein the suppressing part suppresses, in accordance with the control value acquired by the controlling part, a digital sound signal converted from a sound received from a direction other than the direction of the given sound source among the digital sound signals, without suppressing a digital sound signal converted from a sound received from the direction of the given sound source.