Audio processing using auditory scene analysis and spectral skewness
US8396574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Jan 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for controlling the loudness of auditory events in an audio signal. In an embodiment, the method includes weighting the auditory events (an auditory event having a spectrum and a loudness), using skewness in the spectra and controlling loudness of the auditory events, using the weights. Various embodiments of the invention are as follows: The weighting being proportionate to the measure of skewness in the spectra; the measure of skewness is a measure of smoothed skewness; the weighting is insensitive to amplitude of the audio signal; the weighting is insensitive to power; the weighting is insensitive to loudness; and any relationship between signal measure and absolute reproduction level is not known at the time of weighting; the weighting includes weighting auditory-event-boundary importance, using skewness in the spectra.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.