| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sound recognition method and an apparatus that allow a sound interval of object sound under a noise environment to be detected. <P>SOLUTION: There is provided a sound recognition method, which allows a sound interval of object sound having periodical stationarity under a noise environment to be detected and comprises: a first step for collecting an analog acoustic signal by using sound inputting means, and converting the analog acoustic signal to a digital waveform signal constituted by frames; a second step for analyzing the digital waveform signal in frame units to calculate an auto-correlation function and a secondary auto-correlation function; and a third step for determining a range in which a sum of difference absolute values of the secondary auto-correlation functions calculated for each frame exceeds a pre-set threshold value, to be the sound interval, and an apparatus of the method. <P>COPYRIGHT: (C)2013,JPO&INPIT |
