Removing time delays in signal paths

Removing time delays in signal paths

  • CN 101,297,594 B
  • Filed: 10/02/2006
  • Issued: 07/02/2014
  • Est. Priority Date: 10/24/2005
  • Status: Active Grant
First Claim
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1. a method for audio signal, it comprises:

  • Reception comprises the down-mix audio signal of time domain and the sound signal of spatial information;

    The described down-mix audio signal of described time domain is converted into the down-mix audio signal in multiple quadrature mirror filter territory;

    Make the described down-mix audio signal in described multiple quadrature mirror filter territory postpone a delay inequality, described delay inequality is introduced by the difference between low-power decoding scheme and high-quality decoding scheme;

    AndCombine delayed down-mix audio signal and described spatial information,Wherein, described low-power decoding scheme comprises the described down-mix audio signal of described time domain is transformed to the down-mix audio signal in real quadrature mirror filter territory and the described down-mix audio signal in described real quadrature mirror filter territory transformed to the described down-mix audio signal in described multiple quadrature mirror filter territory, and described high-quality decoding scheme comprises the described down-mix audio signal that the described down-mix audio signal of described time domain is converted directly to described multiple quadrature mirror filter territoryWherein, described delay inequality equals the described down-mix audio signal in described real quadrature mirror filter territory to transform to the time of experiencing during the described down-mix audio signal in described multiple quadrature mirror filter territory.

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