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Audio signal processing method and apparatus

  • US 10,321,254 B2
  • Filed: 08/20/2018
  • Issued: 06/11/2019
  • Est. Priority Date: 03/19/2014
  • Status: Active Grant
First Claim
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1. A method for processing an audio signal, comprising:

  • receiving an audio signal of a first channel, wherein the first channel is classified into a first channel group, and the audio signal of the first channel includes a plurality of subband signals;

    receiving an audio signal of a second channel, wherein the second channel is classified into a second channel group, and the audio signal of the second channel includes a plurality of subband signals;

    filtering each subband signal of the first channel by using each set of subband filter coefficients generated from a first set of filter coefficients, wherein the first set of filter coefficients corresponds to a position related to the first channel in a virtual reproduction space;

    filtering each subband signal of the second channel by using each set of subband filter coefficients generated from a second set of filter coefficients, wherein the second set of filter coefficients corresponds to a position related to the second channel in the virtual reproduction space; and

    generating an output audio signal by mixing the filtered subband signals of the first channel and the filtered subband signals of the second channel;

    wherein a length of the set of subband filter coefficients is determined based on a filter order for each subband and for each channel group, and the filter order is variable for each subband and for each channel group.

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