US Patent Application 18311063. AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE simplified abstract

AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE

Organization Name

HUAWEI TECHNOLOGIES CO., LTD.

Inventor(s)

Liyun Pang of Munich (DE)

Fons Adriaensen of Munich (DE)

Song Li of Hannover (DE)

Roman Schlieper of Hannover (DE)

AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18311063 titled 'AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE

Simplified Explanation

The abstract describes an audio controller for active noise reduction (ANR) that reduces ambient noise.

• The audio controller has processing circuitry that includes a fixed ANR filter and an adaptive ANR filter.
• The fixed ANR filter generates a first noise reduction signal.
• The adaptive ANR filter has adjustable filter coefficients and generates a second noise reduction signal.
• The processing circuitry combines the first and second noise reduction signals to generate a total noise reduction signal.
• The total noise reduction signal is a weighted linear combination of the first and second noise reduction signals.

Original Abstract Submitted

An audio controller for an active noise reduction, ANR, reduces an ambient noise signal. The audio controller includes processing circuitry configured to provide a fixed ANR filter configured to generate a first noise reduction signal. Moreover, the processing circuitry is further configured to provide an adaptive ANR filter. The adaptive ANR filter includes one or more adjustable filter coefficients for adapting the adaptive ANR filter and the adaptive ANR filter is configured to generate a second noise reduction signal. The processing circuitry is further configured to generate a total noise reduction signal as an adjustable weighted linear combination of the first noise reduction signal and the second noise reduction signal.