Patent ID: 9330683
Filing Date: 2016-05-03
CPC Classification: G10L

Claim Text:
1. An apparatus for discriminating speech/non-speech of a first acoustic signal, comprising: a memory to store computer executable instructions; a processor configured to execute the computer executable instructions to perform operations comprising: assigning a weight to each, frequency band, based on both a frequency spectrum of the first acoustic signal including a user's speech and a frequency spectrum of a second acoustic signal including a disturbance sound, wherein the first acoustic signal is acquired via a main microphone, and the second acoustic signal is acquired via a sub microphone located at a position farther than the main microphone from the user; extracting a feature from the frequency spectrum of the first acoustic signal, based on an updated weight of each frequency band; and discriminating speech/non-speech of the first acoustic signal, based on the feature, wherein, the assigning assigns a first weight to a frequency band in which the frequency spectrum of the first acoustic signal is smaller than a first threshold, assigns a second weight larger than the first weight to frequency bands in which the frequency spectrum of the first acoustic signal is not smaller than the first threshold, and updates the first weight already assigned to the frequency band in which the frequency spectrum of the second acoustic signal is not larger than a second threshold, to the second weight, the extracting extracts the feature by excluding frequency spectrums of the frequency band to which the first weight is assigned.