Decorrelator for upmixing systems
US8885836B2 · kind B2 · utility
13Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2009 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Feb 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S7/307
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved decorrelator is disclosed that processes an input audio signal in two separate paths. In one path, a banded phase-flip filter is applied to lower frequencies of the input audio signal. In a second path, a frequency-dependent delay is applied to higher frequencies of the input audio signal. Signals from the two paths are combined to obtain an output signal that is psychoacoustically decorrelated with the input audio signal. The decorrelated signal can be mixed with the input audio signal without generating audible artifacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.