Patent ID: 9478232
Filing Date: 2016-10-25
CPC Classification: G10L

Claim Text:
1. A signal processing apparatus comprising: acquiring circuitry configured to acquire first feature vectors of an acoustic signal by analyzing a frequency of the acoustic signal, wherein the acoustic signal is inputted through a microphone; first ambient sound estimating circuitry configured to estimate, from the first feature vectors, one or more first ambient sound component vectors, each of the first feature vectors is acquired within one of a plurality of first time periods, each of the first ambient sound component vectors being non-stationary among ambient sound component vectors and corresponding to one of the first feature vectors; representative component estimating circuitry configured to estimate a representative component vector that is representative of the first ambient sound component vectors, an element of the representative component vector being obtained on the basis of a largest value of corresponding elements among the first ambient sound component vectors; first voice estimating circuitry configured to estimate, from one of the first feature vectors, a first voice component vector that is a voice component vector corresponding to one of the first feature vectors; first filter generating circuitry configured to generate a first filter, for extracting a second voice component vector and a second ambient sound component vector from further acoustic signal, on the basis of the first voice component vector and the representative component vector; and separating circuitry configured to separate the further acoustic signal into a voice signal and an ambient sound signal by using the first filter.