| 摘要 |
PURPOSE:To provide a pitch extracting device for a voice signal by which a pitch can be extracted in few extracting errors even by a little processing quantity or a little delay. CONSTITUTION:A pitch extracting device has a window means 19 to determine a window width being a time width up to an end from a start of sampling with every frame of an input voice signal 1, a thinning-out means 5 which thins out and samples input sampling themes and outputs data, a pitch period calculating means 6 to calculate a pitch period of the input voice signal 1, and a cotrol means 4 which expands and contracts the window width and changes a thinning-out rate of the thinning-out means 5 by comparing an average value of the pitch period with every past frame with a prescribed value, and has a window position determining means, a noise removing means and a correcting means to select and output the pitch period. |
