Invention Grant
US09414150B2 Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
有权
用于个人音频设备的低延迟多驱动器自适应噪声消除(ANC)系统
- Patent Title: Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
- Patent Title (中): 用于个人音频设备的低延迟多驱动器自适应噪声消除(ANC)系统
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Application No.: US13968007Application Date: 2013-08-15
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Publication No.: US09414150B2Publication Date: 2016-08-09
- Inventor: Jon D. Hendrix , Jeffrey Alderson , Ali Abdollahzadeh Milani , Dayong Zhou , Yang Lu
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: CIRRUS LOGIC, INC.
- Current Assignee: CIRRUS LOGIC, INC.
- Current Assignee Address: US TX Austin
- Agency: Mitch Harris, Atty at Law, LLC
- Agent Andrew M. Harris
- Main IPC: G10K11/16
- IPC: G10K11/16 ; H04R1/24 ; G10K11/178 ; H04R3/12 ; H04R3/00 ; H04H40/72 ; H04R1/10

Abstract:
A personal audio device including multiple output transducers for reproducing different frequency bands of a source audio signal, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each of the transducers from at least one microphone signal that measures the ambient audio to generate anti-noise signals. The anti-noise signals are generated by separate adaptive filters such that the anti-noise signals cause substantial cancellation of the ambient audio at their corresponding transducers. The use of separate adaptive filters provides low-latency operation, since a crossover is not needed to split the anti-noise into the appropriate frequency bands. The adaptive filters can be implemented or biased to generate anti-noise only in the frequency band corresponding to the particular adaptive filter. The anti-noise signals are combined with source audio of the appropriate frequency band to provide outputs for the corresponding transducers.
Public/Granted literature
- US20140270222A1 LOW-LATENCY MULTI-DRIVER ADAPTIVE NOISE CANCELING (ANC) SYSTEM FOR A PERSONAL AUDIO DEVICE Public/Granted day:2014-09-18
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