Patent ID: 8698921
Filing Date: 2014-04-15
Classification: G10L,G11B,H04N

Abstract:
1. An audio processing device for suppressing noise from an audio signal acquired by an audio acquisition apparatus, the audio acquisition apparatus including a predetermined component and a drive unit, the drive unit driving the component, the noise being caused by driving of the component by the drive unit, the audio processing device comprising: a noise period setting unit that sets a second period with respect to the audio signal, the second period being an interval between the point in time when a predetermined first period elapses since the timing when a drive instruction is made to the drive unit and the point in time when the drive unit stops the driving according to the drive instruction; a noise estimation unit that estimates a noise level using the signal present in the second period set by the noise period setting unit; a noise suppression unit that suppresses the noise from the signal present in the second period using the noise level estimated by the noise estimation unit, wherein the noise period setting unit further sets a fourth period, the fourth period being an interval between the point in time when a third period elapses since the timing when the drive instruction is made to the drive unit and the endpoint of the first period, the fourth period falling within the first period, wherein the noise estimation unit further estimates a noise level using the signal present in the fourth period set by the noise period setting unit, and wherein the noise suppression unit further suppresses the noise from the signal present in the fourth period using the noise level of the signal present in the fourth period estimated by the noise estimation unit.