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Spatial disassembly processor

  • US 7,630,500 B1
  • Filed: 04/15/1994
  • Issued: 12/08/2009
  • Est. Priority Date: 04/15/1994
  • Status: Active Grant
First Claim
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1. A method of processing a pair of input signals L(t) and R(t) representing left and right channels of a stereo audio signal, characterized by a predetermined spectral balance and predetermined spatial balance to form subband signals representative of N output channel signals o1(t), o2(t), . . . , on(t), wherein N>

  • 2 and t is time, the output channel signals to be reproduced over spatially separated loudspeakers, said method comprising;

    generating a first subband signal representation of the signal L(t), said first subband signal representation containing a plurality of first subband frequency sample components Lk(t) where k is an integer ranging from 1 to M;

    generating a second subband signal representation of the signal R(t), said second subband signal representation containing a plurality of second subband frequency sample components Rk(t); and

    combining said frequency sample components of the input signals L(t) and R(t) according to an output construction rule oj,k(t)=f(Lk(t),Rk(t)) for k=1, 2, . . . , M and j=1, 2, . . . , N to provide the output subband signal representation for each of said plurality of output channel signals, each of said output subband signal representations containing a plurality of output subband signal components oj,k(t), wherein oj,k(t) represents the kth subband output signal component of the jth output channel signal,wherein the output construction rule establishes the following relationship for at least some of the subband signal components Lk(t) and Rk(t) and output subband signal components oj,k(t)

    L k

    ( t )


    +

    R k

    ( t )


    =

    j = 1 N






    o j , k

    ( t )


    and reproducing the N output channel signals with N output speakers while preserving said predetermined spectral balance and said predetermined spatial balance of said input signals.

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