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Compressing Method for Digital Audio Files

  • US 20080215340A1
  • Filed: 05/25/2005
  • Published: 09/04/2008
  • Est. Priority Date: 05/25/2005
  • Status: Abandoned Application
First Claim
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1. A compressing method for a digital audio file, comprising:

  • writing an audio file signal or analyzing an audio file information prior to encoding procedures;

    reading audio raw data;

    cutting out a frame from a signal according to a frame size and an overlap-add size;

    using a discrete cosine transform or inverse transform,using a harmonic structure quad tree; and

    encoding a frequency coefficient by employing a CEIHT algorithm and arithmetic coding (AC) on said harmonic structure quad tree so as to complete encoding of a frame.

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