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METHOD AND APPARATUS FOR ENCODING/DECODING AUDIO SIGNAL USING ADAPTIVE LPC COEFFICIENT INTERPOLATION

  • US 20090198501A1
  • Filed: 01/29/2009
  • Published: 08/06/2009
  • Est. Priority Date: 01/29/2008
  • Status: Active Grant
First Claim
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1. A method of encoding an audio signal, the method comprising:

  • determining a window to be applied to a current frame according to characteristics of an audio signal in the current frame;

    performing windowing by applying the first window to the audio signal in the current frame;

    outputting a linear predictive coding (LPC) coefficient of the audio signal in the current frame by performing LPC analysis on the audio signal in the current frame; and

    selectively performing LPC coefficient interpolation using the LPC coefficient of the audio signal in the current frame and an LPC coefficient of an audio signal in an adjacent frame, according to characteristics of the audio signal in the current frame.

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