Patent ID: 8320583
Filing Date: 2012-11-27
Classification: G10L,G11B,H04R

Abstract:
1. A noise reducing device comprising: a sound-signal input unit that inputs a sound signal captured by an electronic apparatus; a time-to-frequency converting unit that converts the input sound signal obtained by being input by the sound-signal input unit into a frequency signal; a patterning unit that calculates, for each of divided frequencies of the frequency signal, an nth order polynomial (n is a natural number) as a polynomial for interpolating sampling points and acquires a coefficient pattern including a set of values of coefficients of respective orders of the polynomial; a matching-data storing unit that stores, in association with the divided frequencies, matching data indicating a matching range as a range of a coefficient pattern regarded as noise, the matching data generated from a predetermined noise definition profile corresponding to noise generated from one or more components of the electronic apparatus; and a noise determining unit that determines, on the basis of a result obtained by comparing the coefficient pattern acquired by the patterning unit and the matching range indicated by the matching data, at least presence or absence of noise occurrence at a divided frequency corresponding to data of the compared coefficient pattern.