| http://www.w3.org/ns/prov#value | - In FIG. 2, the means for processing the recording signal x prior to entering the equalizer 15 can be simplified as a channel 20 The transfer function between the input/output signals x and z of the channel 20 is referred to as Z(D)/X(D)=1+a1*D+a2*D2+a3*D3+a4*D4+ . . . +an???1*Dn???1 in a form of polynomial, where D is a delay time.
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