Reducing octave errors during pitch determination for noisy audio signals
US9530434B1 · kind B1 · utility
7Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2013 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jul 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/906
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Octave errors may be reduced during pitch determination for noisy audio signals. Pitch may be tracked over time by determining amplitudes at harmonics for individual time windows of an input signal. Octave errors may be reduced in individual time windows by fitting amplitudes of corresponding harmonics across successive time windows to identify spurious harmonics caused by octave error. A given harmonic may be identified as either being associated with the same pitch as adjacent harmonics in the given time window or being spurious based on parameters of the fitting function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.