Patent ID: 6075475
Filing Date: 2000-06-13
Classification: G11B,H03M

Abstract:
A method of reconstructing an analog signal from a digitized analog signal, comprising;providing sample values y.sub.k of an analog signal function of time F(t) such that y.sub.k =F(t.sub.0 +kh)where h is the sampling interval, t.sub.0 is the initial time and k=0,1,2, . . . .mu., defining a piecewise constant function of time given by H(t)=y.sub.k, t.sub.k .ltoreq.t<t.sub.k+1 ;constructing an output analog signal function F(t)=y.sub.k, t.sub.k .ltoreq.t<t.sub.k+1, k=0,1,2, . . . .mu., by computing a sequence {y.sub.k } in real time using an effective numerical estimation technique so that an absolute difference given by .vertline..intg.F(t)dt-.intg.F(t)dt.vertline. is less than an absolute difference given by .vertline..intg.H(t)dt-.intg.F(t)dt.vertline. locally in intervals defined by a preselected number of previous sample values y.sub.k ; andoutputting said reconstructed analog signal function F(t) or storing said sequence {y.sub.k } in a digital storage medium for subsequent relieving and outputting in analog form.