Patent ID: 9245539
Filing Date: 2016-01-26
CPC Classification: G10L

Claim Text:
1. A voiced sound interval detection device comprising: circuitry configured to: calculate, from a power spectrum time series of voice signals collected by a plurality of microphones, a multidimensional vector series as a vector series of a power spectrum having as many dimensions as the number of said microphones; cluster said multidimensional vector series; calculate, at each time of said multidimensional vector series sectioned by an arbitrary time length, a center vector of a noise cluster and a center vector of a cluster to which a vector of said voice signal at the time in question belongs and after projecting the center vector of said noise cluster and the vector of said voice signal at the time in question toward a direction of the center vector of the cluster to which the vector of said voice signal at the time in question belongs, calculate a signal noise ratio as a voiced sound index; and determine whether the vector of said voice signal is in a voiced sound interval or a voiceless sound interval by comparing said voiced sound index with a predetermined threshold value for executing voice recognition of the voice signals collected by the plurality of microphones.