Method and apparatus for canceling interference in a loudspeaker communication path through adaptive discrimination
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorAlberto Jimenez Feltström
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Abstract
According to the present invention, a technique is provided for canceling interference from a first audio signal leading to a loudspeaker. A measuring device measures energy of the loudspeaker to produce a measurement signal. An adaptive unit estimates from the measurement signal a plurality of coefficients. A plurality of multipliers multiply the plurality of coefficients by a plurality of periodic signals so as to produce a Fourier approximation of the interference. A summation unit combines the first audio signal having the interference and the Fourier approximation of the interference to produce a second audio signal having the interference suppressed.
Claims21
An apparatus for canceling interference from a first audio signal leading to a loudspeaker, comprising:
- a measuring device for measuring energy of the loudspeaker to produce a measurement signal;
- an adaptive unit for estimating from the measurement signal a plurality of coefficients;
- a plurality of multipliers for multiplying the plurality of coefficients by a plurality of periodic signals so as to produce a Fourier approximation of the interference;
- and
- a summation unit for combining the first audio signal having the interference and the Fourier approximation of the interference to produce a second audio signal having the interference suppressed.
A method for canceling interference from a first audio signal leading to a loudspeaker, comprising:
- measuring energy of the loudspeaker to produce a measurement signal;
- estimating from the measurement signal a plurality of coefficients;
- multiplying the plurality of coefficients by a plurality of periodic signals to produce a Fourier approximation of the interference;
- and
- summing the first audio signal having the interference with the Fourier approximation of the interference to produce a second audio signal having the interference suppressed.
Dependencies are inferred from the claim text.