US 12,300,212 B2 · Active noise cancellation integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, associated method, and active noise cancellation headphone using the same

Abstract

The present invention relates to an active noise cancellation integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, an associated method, and an active noise cancellation headphone using the same. The method is applicable to an audio playback device with at least one ANC filtering unit and at least one non-ANC filtering unit. The method includes: acquiring a non-anti-noise signal from a non-ANC filtering unit; generating a decoupled signal by processing the non-anti-noise signal with the transfer function of a physical channel and operations of an ANC filtering unit; performing a signal superposition, wherein an anti-noise signal from the 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.

Claims20

Dependent claims

An active noise cancellation integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, comprising:

a first path, outputting a first path non-anti-noise signal, wherein the first path non-anti-noise signal is converted into a first signal by a physical channel, wherein the first path comprises:
a non active noise cancellation (non-ANC) filtering unit, for generating a non-anti-noise signal;
a second path, receiving an error signal comprising a component of the first signal, and outputting a second path anti-noise signal to the physical channel, wherein the second path comprises:
an ANC filtering unit, for generating an anti-noise signal, wherein the second path anti-noise signal is derived from the anti-noise signal;
and
a first decoupling unit, for removing the component of the first signal from the second path based on the non-anti-noise signal.

3 more elements

An active noise cancellation method for stacking at least one anti-noise signal and at least one non-anti-noise signal, applicable to an audio playback device with at least one active noise cancellation (ANC) filtering unit and at least one non-ANC filtering unit, wherein the active noise cancellation method for stacking at least one anti-noise signal and at least one non-anti-noise signal comprises:

providing a first path which outputs a first path non-anti-noise signal, wherein the first path non-anti-noise signal is converted to a first signal by a physical channel, wherein the first path comprises a non-ANC filtering unit for generating a non-anti-noise signal;
providing a second path which receives an error signal with a component of the first signal, and outputs a second path anti-noise signal to the physical channel, wherein the second path comprises an ANC filtering unit for generating an anti-noise signal, wherein the second path anti-noise signal is derived from the anti-noise signal;
removing the component of the first signal from the second path based on the non-anti-noise signal;
and
performing playback based on the first path non-anti-noise signal and the second path anti-noise signal to eliminate noise.

2 more elements

An active noise cancellation headphone, comprising:

an active noise cancellation (ANC) integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, comprising:
a first path, outputting a first path non-anti-noise signal, wherein the first path non-anti-noise signal is converted into a first signal by a physical channel, wherein the first path comprises:
a non-ANC filtering unit, for generating a non-anti-noise signal;
a second path, receiving an error signal comprising a component of the first signal, and outputting a second path anti-noise signal to the physical channel, wherein the second path comprises:
an ANC filtering unit, for generating an anti-noise signal, wherein the second path anti-noise signal is derived from the anti-noise signal;
and
a first decoupling unit, for removing the component of the first signal from the second path based on the non-anti-noise signal;
and
an audio-to-electrical signal conversion device, comprising:
a speaker, for playback based on the first path non-anti-noise signal and the second path anti-noise signal to eliminate noise, wherein the speaker is a portion of the physical channel;
and
a microphone, for receiving a noise of an ear canal echo and converting the noise into the error signal.

9 more elements

Dependencies are inferred from the claim text.

Active noise cancellation integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, associated method, and active noise cancellation headphone using the same

Life of this patent

Active noise cancellation integrated circuit for stacking at least one anti-noise signal and at least one non-anti-noise signal, associated method, and active noise cancellation headphone using the same

Life of this patent

Abstract

Claims20