Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
US8199933B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Apr 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Audio signal processing relating to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal 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. In various embodiments, modification parameters are derived for modifying the audio signal in order to reduce the difference between its specific loudness and a target specific loudness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.