Dynamically configurable ANR filter block topology
US8073151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jun 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3028
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In an ANR circuit, possibly of a personal ANR device, each of a feedback ANR pathway in which feedback anti-noise sounds are generated from feedback reference sounds, a feedforward ANR pathway in which feedforward anti-noise sounds are generated from feedforward reference sounds, and a pass-through audio pathway in which modified pass-through audio sounds are generated from received pass-through audio sounds incorporate at least a block of filters to perform those functions; and may each incorporate one or more VGAs and/or summing nodes. For each of these pathways, ANR settings for selections of quantities and types of filters for each filter block, bit sizes of coefficients and/or coefficient values of each of the filters, along with still other ANR settings, are dynamically configurable wherein dynamic configuration is performed in synchronization with the transfer of one or more pieces of digital data along one or more of the pathways, at least within one or more of the filter blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.