Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
US8090120B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2005 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Dec 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/03
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.