Active noise cancellation integrated circuit for stacking multiple anti-noise signals, associated method, and active noise cancellation headphone using the same
US11721315B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Mar 21, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/505
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to an active noise cancellation integrated circuit for stacking multiple anti-noise signals, an associated method, and an active noise cancellation headphone using the same. The method is applicable to an audio playback device with multiple ANC filtering units. The method includes: acquiring an anti-noise signal from an ANC filtering unit; generating a decoupled signal by processing the anti-noise signal with the transfer function of a physical channel and operations of other ANC filtering units; performing a signal superposition, wherein an anti-noise signal from another ANC filtering unit is superposed with the decoupled signal; and performing an audio playback based on the superposed signal and an audio signal such that noise is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.