| 摘要 |
PURPOSE:To obtain the pitch extracting device which can perform secure pitch extraction and is effective for a speech analysis and synthesis system requiring, specially, highly precise pitch tracks of MBE, etc. CONSTITUTION:A pitch detection part 2 detects pitches of constant-time frames of an input speech signal and a smoothing means 3 smoothes the pitch of the current frame with the pitches of the frames right before and after the frame; and a switching part 7 switches, selects and outputs the pitch of the current frame and a substitute pitch which is the smoothing output, and a control means 6 controls the switching of a switching part 7 according to the smoothing output and the pitch of the current frame to detect an abnormal state. In the abnormal state, the substitute pitch is outputted. |
