| 摘要 |
PURPOSE: To calculate the precise ability of a song by calculating the mark of a sound source through the use of a mutual correlation unit comparing the similarity of an accompanied signal and a sound source signal. CONSTITUTION: In the mutual correlation unit 30 where the accompanied signal and the sound source signal are applied from digital filters 8 and 50, the average value of applied operation data is calculated in a first average calculation part 37 and it is applied to a normalizer 40 when the applied accompanied signal and the sound source signal are correlatively operated and it is applied to the first average calculation part 37 as operation data. In the normalizer 40 to which operation data of the accompanied signal and the sound source signal is applied from the automatic correlation units 9 and 45 and the mutual correlation unit 30, the mark of the sound source, which is received through a microphone signal source 55, is calculated at first based on respective applied operation data. For one example of the operation, a method for dividing data received from the mutual correlation unit 30 through an average calculation part 35 by data received from the automatic correlation unit 45 through an average calculation part 36 is given. |
