Method for decoding MPEG audio data

  • US 5,864,817 A
  • Filed: 10/26/1995
  • Issued: 01/26/1999
  • Est. Priority Date: 03/15/1991
  • Status: Expired due to Term
First Claim
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1. A method for decoding an MPEG audio data frame, comprising the steps of:

  • decoding subband data from an audio data frame to generate a first vector, the first vector having components which represent frequency-domain components of a sound sample;

    combining two or more components of the first vector, using a butterfly unit;

    determining a product of the combination and a matrixing coefficient, using a multiplier;

    accumulating the product into a memory location; and

    repeating the combining, determining, and accumulating steps one or more times to determine a component of a second vector, the second vector having components which represent frequency-domain components of a sound sample.

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