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Method and apparatus for frequency-domain downmixing with block-switch forcing for audio decoding functions

  • US 6,931,291 B1
  • Filed: 05/08/1997
  • Issued: 08/16/2005
  • Est. Priority Date: 05/08/1997
  • Status: Expired due to Term
First Claim
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1. An audio decoder, comprising:

  • a demultiplexer for receiving a data signal and demultiplexing the data signal into a plurality of M frequency-domain·

    input data channels;

    means for downmixing said M frequency-domain input channels into P frequency-domain channels, where M>

    P and P>

    0, M and P both integers;

    means for selecting an inverse transformation length and forcing data blocks in the P frequency-domain channels into the selected length and performing an inverse transformation of the P frequency-domain channels according to the selected length, so as to produce P audio sample output channels.

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