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Apparatus for encoding and decoding audio signal and method thereof

  • US 8,073,702 B2
  • Filed: 06/30/2006
  • Issued: 12/06/2011
  • Est. Priority Date: 06/30/2005
  • Status: Active Grant
First Claim
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1. A method of decoding an audio signal, the method comprising:

  • receiving a spatial information signal;

    receiving a second downmix signal having at least one channel;

    extracting spatial information and an arbitrary downmix gain from the spatial information signal,wherein the spatial information is determined when a first downmix signal is generated, andwherein the arbitrary downmix gain is used to modify an energy level of the second downmix signal;

    compensating the second downmix signal by modifying the energy level of the second downmix signal based on the arbitrary downmix gain to be identical to that of the first downmix signal; and

    generating a multi-channel audio signal by applying the spatial information to the compensated second downmix signal,wherein the arbitrary downmix gain is applied to the second downmix signal by frame.

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