Pitch information generation device, pitch information generation method, and computer-readable recording medium therefor
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United States of America Patent
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Mar 26, 2019
Grant Date -
Feb 16, 2017
app pub date -
Oct 27, 2016
filing date -
Apr 30, 2014
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Abstract
A pitch information generation device includes a first envelope generator configured to generate, with regard to a first sound range, a first envelope that attenuates at a first rate of change from a detected value corresponding to a peak in the sound signal, a second envelope generator configured to generate, with regard to a second sound range, which includes a sound range of higher frequency than the first sound range, a second envelope that attenuates from a detected value corresponding to a peak in the sound signal at a second rate of change. The second rate of change is greater than the first rate of change. A pitch information identifier is configured to identify the pitch information based on the first envelope and the second envelope.
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