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Method and device for applying dynamic range compression to a higher order ambisonics signal

  • US 9,936,321 B2
  • Filed: 03/24/2015
  • Issued: 04/03/2018
  • Est. Priority Date: 03/24/2014
  • Status: Active Grant
First Claim
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1. A method for dynamic range compression (DRC), the method comprising:

  • applying DRC in a Quadature Mirror Filter (QMF)-filter bank domain;

    receiving a Higher Order Ambisonics (HOA) audio representation and a gain value g(n, m) corresponding to a time frequency tile (n, m);

    applying the gain value and a Discrete Spherical Harmonics Transform (DSHT) matrix to the HOA audio representation,wherein the gain value is applied based on{hacek over (w)}DRC(n, m)=diag(g(n, m))ŵ

    DSHT(n, m), wherein ŵ

    DSHT(n, m) is a vector of spatial channels for the time frequency tile (n, m), and wherein the vector ŵ

    DSHT(n, m) is determined based on an application of the DSHT matrix to HOA audio representation.

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