SOUND JUDGING DEVICE, SOUND SENSING DEVICE, AND SOUND JUDGING METHOD
展开▼
机译:声音判断装置,声音感测装置和声音判断方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A sound determination device (100) includes: an FFT unit (2402) which receives a mixed sound including a to-be-extracted sound and a noise, and obtains a frequency signal of the mixed sound for each of a plurality of times included in a predetermined duration; and a to-be-extracted sound determination unit (101 (j)) which determines, when the number of the frequency signals at the plurality of times included in the predetermined duration is equal to or larger than a first threshold value and a phase distance between the frequency signals out of the frequency signals at the plurality of times is equal to or smaller than a second threshold value, each of the frequency signals with the phase distance as a frequency signal of the to-be-extracted sound. The phase distance is a distance between phases of the frequency signals when a phase of a frequency signal at a time t is È (t) (radian) and the phase is represented by È' (t) = mod 2 À (È (t) - 2 À f t) (where f is an analysis-target frequency).
展开▼
机译:声音确定装置(100)包括:FFT单元(2402),该FFT单元(2402)接收包括待提取的声音和噪声的混合声音,并针对包括在其中的多次获取混合声音的频率信号。预定的持续时间;提取声音确定单元(101(j)),其确定预定持续时间中包括的多次频率信号的数量是否等于或大于第一阈值和相位距离。在多次的频率信号中,频率信号之间的频率差等于或小于第二阈值,每个具有相距的频率信号作为待提取声音的频率信号。相位距离是在时间t处的频率信号的相位为È(t)(弧度)并且相位由È'(t)= mod 2À(È(t )-2英尺)(其中f是分析目标频率)。
展开▼