Hybrid digital/analog loudness-compensating volume control
US8194889B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jan 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A loudness-compensating volume control method imposes a desired loudness scaling on an audio signal by processing the audio signal in both the digital and analog domains by receiving a desired loudness scaling, deriving a wideband gain component and one or more other gain components from the desired loudness scaling, applying in the digital domain modifications to the audio signal based on the one or more other gain components to produce a partly-modified audio signal, and applying in the analog domain modifications to the partly-modified audio signal based on the wideband gain component. Additional loudness modifications other than volume control loudness modifications on the audio signal may also be imposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.