Problem to be solved: to detect the presence or absence of a predetermined phenomenon by detecting the rhythm from the complex signal.A calculation unit 102 for calculating a correlation function based on a comparison signal included in an analysis interval, which is a period of a predetermined time included in a signal, and a correlation signal included in a contrast section which is overlapped with at least a part of time in the analysis section, and the obtained correlation The pole specific part 103 for specifying the pole of the same sign of the function, the interval calculating part 104 for calculating the time interval between adjacent poles in a plurality of poles, and the representative value representative of the rhythmicity by the statistical method using the intervalThe statistical processing unit 105 includes a statistical processing unit 105 and a generation determining unit 106 for judging that a predetermined phenomenon has occurred by comparing the representative value with a predetermined threshold value.Diagram【課題】複雑に変動する信号から律動性を検出し所定の現象発生の有無を判断する。【解決手段】信号を取得する取得部101と、信号に含まれる所定時間の区間である解析区間に含まれる解析信号と、解析区間と少なくとも一部時間的に重複する対比区間に含まれる対比信号とに基づき相関関数を算出する関数算出部102と、得られた相関関数の同符号の極を特定する極特定部103と、複数の極において隣り合う極の間の時間間隔を算出する間隔算出部104と、間隔を用い統計的な手法により律動性を示す代表値を算出する統計処理部105と、代表値を所定の閾値と比較することにより所定の現象が発生したと判断する発生判断部106とを備える現象発生判断システム100。【選択図】図1
