Patent ID: 7478315
Filing Date: 2009-01-13
Classification: G11B,H03M

Abstract:
1. A system for use in a tape drive, the system comprising: a tape head accessing a tape, the tape head generating read signals based on a spatial relationship between the tape head and the tape; a plurality of pulse shaping filters, each pulse shaping filter receiving the read signals and producing pulse-shaped signals, each pulse shaping filter having at least one filter parameter based on a possible tape head-to-tape spatial relationship, the at least one filter parameter unique to that filter; and a signal decoder receiving the plurality of pulse-shaped signals and producing decoded output signals, the signal decoder comprising (a) a plurality of viterbi processors, each viterbi processor accepting pulse-shaped signals from one of the plurality of pulse shaping filters, and (b) at least one low density parity check decoder producing the decoded output signals based on the output from one of the plurality of viterbi processors.