Sound processing method using DJ transform
US12300265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Jul 24, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/235
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a sound processing method performed by a computer, the method comprising generating a DJ transform spectrogram indicating estimated pure-tone amplitudes for respective frequencies corresponding to natural frequencies of a plurality of springs and a plurality of time points by modeling an oscillation motion of the plurality of springs having different natural frequencies, with respect to an input sound, and calculating the estimated pure-tone amplitudes for the respective natural frequencies; calculating degrees of fundamental frequency suitability based on a moving average of the estimated pure-tone amplitudes or a moving standard deviation of the estimated pure-tone amplitudes with respect to each natural frequency of the DJ transform spectrogram; and extracting the fundamental frequency based on local maximum values of the degrees of fundamental frequency suitability for the respective natural frequencies at each of the plurality of time points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.