Dynamic range enhancement (DRE) control in adaptive noise cancellation (ANC) applications
US11423872B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2021 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Jul 7, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3213
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A system that reproduces an output signal including dynamic range enhancement (DRE) reduces audible artifacts generated by changes in operating range of the dynamic range enhancement (DRE) when the output signal includes an adaptive noise canceling (ANC) component. A first detection circuit determines an input signal amplitude and a second detection circuit determines a measure of an amplitude of a noise canceling component of the input signal. A control circuit determines whether the amplitude of the noise canceling component is significant with respect to the input signal amplitude and controls characteristics of a dynamic range enhancer to override a default behavior of the dynamic range enhancer if the amplitude of the noise-canceling component is significant with respect to the input signal amplitude. The characteristics may include rise/fall times of a gain control of the dynamic range enhancer and may be controlled in multiple separate frequency bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.