Audio detection device, audio method of detection, audio detection program and record medium

摘要

As for this invention, it improves the detection precision of the audio section in the conversational system which allows the fact that the group of speakers utter simultaneously from the respective microphone. The audio non audio decision section 104 where audio detection device 20, in every frequency width (sub band) which is decided beforehand, the power calculation section in the noise presumption section every 202 classified by zone where presumes the noise power every of 200 classified by zone which calculates the harmony (sub band power) of power of the signal which is respectively input from the plural microphones and the aforementioned sub band and the aforementioned sub band, calculates sub band SNR, the biggest sub band SNR, of the SNR calculation section making use 203 classified by zone which as SNR of the particular microphone it outputs and the description above SNR audio decides non sound and,It has (Figure 1).