PITCH INFORMATION GENERATION DEVICE, PITCH INFORMATION GENERATION METHOD, PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

In the present invention, a pitch information generation device is provided with a first envelope generation unit for generating a first envelope for attenuating with a first degree of change from a detection value corresponding to a peak in an acoustic signal for a first register, a second envelope generation unit for attenuating with a second degree of change greater than the degree of change per unit time of the first degree of change from a detection value corresponding to a peak in an acoustic signal for a second register including a register having a higher frequency than the first register, and an information specifying unit for specifying pitch information on the basis of the first envelope and the second envelope.