Patent ID: 8473282
Filing Date: 2013-06-25
Classification: G10L

Abstract:
1. A sound processing device comprising a control device coupled to a storage device, the control device comprising an arithmetic processing unit that, by executing a program, functions as: a modulation spectrum specifier that specifies a modulation spectrum of an input sound for each of a plurality of unit intervals which are arranged along a time axis; a first index calculator that calculates a first index value corresponding to a magnitude of components of modulation frequencies belonging to a predetermined range of the modulation spectrum; and a determinator that determines whether the input sound of each of the unit intervals is a vocal sound or a non-vocal sound based on the first index value, wherein the first index calculator calculates the first index value based on a ratio between the magnitude of the components of the modulation frequencies belonging to the predetermined range of the modulation spectrum and a magnitude of components of modulation frequencies belonging to a range including the predetermined range and being wider than the predetermined range.