Precise write-time compensation for nonlinear transition shift in magnetic tape recording using a d=1 RLL code

概要

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We propose precise write-time compensation for nonlinear transition shift in magnetic tape recording using d=1 rjunlength-limited(RLL)code as a channel modulation. In this write-time compensation approach, the write current transitions having a transition within 3 bits earlier are shifted so as to minimize the transition shift of the readback signal. First, we precisely measured the nonlinear transition shift using a VCR. Next, based on this measurement, we simulated the effects of the write-time compensation, verifying them in recording experiments with a VCR. The results show that when the optimum read equalization is applied to the readback signal, this write-time compensation approach increases the eye height and eye width while improving the byte error rate by about two orders.
社団法人映像情報メディア学会の論文
1999-02-26