| 摘要 |
PROBLEM TO BE SOLVED: To provide the delay time detecting device which can prevent the period needed to calculated a delay time from becoming long when the number of samples holding an audio delay signal increases. SOLUTION: The delay time detecting device 100 has a 1st holding means 81 which holds a 1st audio signal S71 having a 1st sample number N1, a 2nd holding means 82 which holds a 2nd audio signal (audio delay signal) S72 with a 2nd sample number N2 (>N1) delayed behind the 1st audio signal S71, a correlating means 83 which calculates the correlation values R of the 1st and 2nd audio signals S71 and S72 in order by shifting the 2nd audio signal S72 held by the 2nd holding means 82, sample by sample, and a calculating means 85 which calculates the delay time Td of the 2nd audio signal S72 according to the number of samples A shifted until a correlation value R is calculated when the correlating means 83 calculates the correlation value R equal to or larger than a previously set value Rt. |
