×

Low complexity decoder for complex transform coding of multi-channel sound

  • US 8,046,214 B2
  • Filed: 06/22/2007
  • Issued: 10/25/2011
  • Est. Priority Date: 06/22/2007
  • Status: Active Grant
First Claim
Patent Images

1. A method of decoding multi-channel audio, the method comprising:

  • decoding a set of cross-channel correlation and channel power parameters from an encoded audio stream;

    deriving a real number matrix transform from the set of cross-channel correlation and channel power parameters that satisfies a magnitude of cross-channel correlation;

    reconstructing spectral coefficients of a coded subset of channels of the multi-channel audio;

    with a processing unit, performing channel extension processing from the reconstructed spectral coefficients of the coded subset of channels based on the real number matrix transform to reconstruct spectral coefficients of the channels of the multi-channel audio; and

    applying an inverse time-frequency transform to reconstruct the multi-channel audio.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×