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System and method for low power stereo perceptual audio coding using adaptive masking threshold

  • US 8,332,216 B2
  • Filed: 08/22/2006
  • Issued: 12/11/2012
  • Est. Priority Date: 01/12/2006
  • Status: Active Grant
First Claim
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1. A method for stereo audio perceptual encoding of an input signal, comprising:

  • performing a time-to-frequency transformation;

    performing a quantization;

    performing a bitstream formatting to produce an output stream;

    performing a psychoacoustics analysis including masking threshold estimation for a first channel on a first of every two successive frames of the input signal; and

    reusing the estimated masking threshold on each first frame for a second channel and, unless the input signal is a transient signal, for the first and second channels of the second of the respective two successive frames, wherein when the input signal is of a transient characteristics, the masking threshold is reused only across channels within each individual frame.

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