CPC H04R 3/04 (2013.01) | 24 Claims |
1. A system, comprising:
a circuitry configured to:
generate quadrature components from an audio channel defining a quadrature representation of the audio channel;
generate rotated spectral quadrature components by applying a forward transformation that rotates a spectrum of the quadrature components from a standard basis to a rotated basis;
in the rotated basis:
isolate components of the rotated spectral quadrature components at target frequencies; and
generate weighted phase-coherent harmonic spectral quadrature components by applying a nonlinearity to the isolated components having a dependence on scale that is subject to constraints;
generate a harmonic spectral component by applying an inverse transformation that rotates a spectrum of the weighted phase-coherent harmonic spectral quadrature components from the rotated basis to the standard basis;
combine the harmonic spectral component with frequencies of the audio channel outside of the target frequencies to generate an output channel; and
provide the output channel to a speaker.
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