Noise cancellation system with lower rate emulation

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United States of America Patent

PATENT NO 9654871
SERIAL NO

14551832

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Abstract

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A noise cancellation system, comprising: an input for a digital signal, the digital signal having a first sample rate; a digital filter, connected to the input to receive the digital signal; a decimator, connected to the input to receive the digital signal and to generate a decimated signal at a second sample rate lower than the first sample rate; and a processor. The processor comprises: an emulation of the digital filter, connected to receive the decimated signal and to generate an emulated filter output; and a control circuit, for generating a control signal on the basis of the emulated filter output. The control signal is applied to the digital filter to control a filter characteristic thereof.

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Patent Owner(s)

  • CIRRUS LOGIC, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clemow, Richard Gerrards Cross, GB 18 535
Magrath, Anthony J Edinburgh, GB 13 224

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