Adaptive feedback cancellation based on inserted and/or intrinsic characteristics and matched retrieval
US8442251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2010 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Dec 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio processing system processing an input sound to an output sound includes: an input transducer for converting input sound to an electric input signal and defining an input side; an output transducer for converting a processed electric output signal to an output sound and defining an output side; a forward path defined between the input transducer and the output transducer; a signal processing unit for processing an SPU-input signal originating from the electric input signal and to provide a processed SPU-output signal, and an electric feedback loop from the output side to the input side, having a feedback path estimation unit for estimating an acoustic feedback transfer function from the output transducer to the input transducer, and a enhancement unit for estimating noise-like signal components in the electric signal of the forward path and providing a noise signal estimate output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.