Digital audio system and method therefor
US7493179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2002 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention relate generally to digital volume control in digital audio systems. One embodiment relates to a digital audio system having a digital audio processor and a digital volume control coupled to the digital audio processor. The digital volume control includes a feedback loop having an attenuator, and error determination unit, and a filter. The feedback loop determines the attenuation error and shifts the attenuation error beyond a predetermined digital audio range. The output of the digital volume control maintains a substantially constant SNR and THD with respect to the level attenuation over the predetermined digital audio range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.