Variable matrix decoder with three output channels

  • US 5,046,098 A
  • Filed: 06/01/1989
  • Issued: 09/03/1991
  • Est. Priority Date: 03/07/1985
  • Status: Expired due to Term
First Claim
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1. A decoder for decoding two or more channel signals in a directional information system wherein one or more input signals containing directional information are encoded into the two or more channel signals, said decoder comprising:

  • first means for generating at least a first dominance signal indicative of the ratio of the amplitudes of said two channel signals;

    second means for generating at least a second dominance signal indicative of the ratio of the amplitudes of the sum of and the difference between said two channel signals; and

    matrix means responsive to said two or more channel signals and to said at least two dominance signals for generating a plurality of output signals for which directional effects of the output signals are enhanced, wherein the first dominance signal DLR and the second dominance signal DCS are given by;

    ##EQU13## where LT, RT are two channel signals P=LT +RT, M=LT -RT ; and

    a is a constant,and wherein said matrix means includes means for deriving three directional control signals EL, ER, EC.

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