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Process and device for mixing sound signals

  • US 6,363,155 B1
  • Filed: 12/22/1997
  • Issued: 03/26/2002
  • Est. Priority Date: 09/24/1997
  • Status: Expired due to Term
First Claim
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1. A process for mixing a plurality of sound signals comprising:

  • separating each sound signal;

    selectively delaying each separated sound signal;

    selectively weighting each separated and selectively delayed sound signals in accordance with a number of channels;

    adding the selectively weighted signals corresponding to a same channel to form a plurality of intermediary signals; and

    decoding each intermediary signal to produce a plurality of output signals, by;

    separating each intermediary signal into a plurality of signals to be filtered, the plurality of signals corresponding in number to a number of the plurality of output signals;

    filtering each separated intermediary signal; and

    adding corresponding filtered signals together to form the plurality of output signals, said filtering comprising;

    selecting a reference direction for normalization;

    determining a filter pair for each angle of incidence;

    approximating each filter pair by transfer functions of recursive filters of between approximately 1 and 6 degrees;

    processing the signal in a non-recursive filter; and

    processing the signal in a recursive filter.

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