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Surround detection system

  • US 20040179697A1
  • Filed: 03/26/2004
  • Published: 09/16/2004
  • Est. Priority Date: 05/03/2002
  • Status: Active Grant
First Claim
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1. A method for determining whether a sound field is intended for production in one channel pair or a plurality of channel pairs, comprising:

  • detecting one or more sound events in the sound field;

    determining a direction of a power of the sound field, when any of the one or more sound events are detected;

    determining a number of instances in which the direction of the power of the sound field includes a predetermined direction;

    determining whether the number exceeds a value; and

    determining that the sound field is intended for production in the plurality of channel pairs, if the number exceeds the value.

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