Method and Apparatus for a Configurable Active Noise Canceller
AssigneeTexas Instruments Incorporated
InventorsNitish Krishna Murthy, Supriyo Palit, Edwin Randolph Cole, Jorge Francisco Arbona Miskimen
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Abstract
A method and apparatus for active noise canceling. The method includes retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter, retrieving the input sample and a related filter, wherein the filter is customized to the particular headset, outputting a filtered signal through a speaker without any interpolation and reducing order of CIC filters, and outputting a response sharply tapered down.
Claims3
A method of a digital processor for active noise cancelling, comprising:
- retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter;
- retrieving the input sample and a related filter, wherein the filter is customized to the particular headset;
- outputting a filtered signal through a speaker without any interpolation and reducing order of CIC filters;
- and
- outputting a response sharply tapered down.
An active noise canceller, comprising:
- means for retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter;
- means for retrieving the input sample and a related filter, wherein the filter is customized to the particular headset;
- means for outputting a filtered signal through a speaker without any interpolation and means for reducing order of CIC filters;
- and
- means for outputting a response sharply tapered down.
A non-transitory computer readable medium with executable computer instructions, when executed the instructions perform a method for active noise cancelling, the method comprising:
- retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter;
- retrieving the input sample and a related filter, wherein the filter is customized to the particular headset;
- outputting a filtered signal through a speaker without any interpolation and reducing order of CIC filters;
- and
- outputting a response sharply tapered down.
Dependencies are inferred from the claim text.