Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Reexamination Certificate
2005-05-17
2005-05-17
Tran, Sinh (Department: 2651)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
C360S046000, C360S039000, C360S055000
Reexamination Certificate
active
06894858
ABSTRACT:
A system and method for decoding magnetic media. Parallel decoders, each with a different equalization magnitude, are used to decode a read signal. A Viterbi metric is used to determine the direction and magnitude of equalization shift that best compensates for a systematic separation, such as pole tip recession. If optimal equalization has changed, the equalization coefficients of the decoders is shifted to compensate.
REFERENCES:
patent: 4847871 (1989-07-01), Matsushita et al.
patent: 4912573 (1990-03-01), Murabayashi et al.
patent: 5150381 (1992-09-01), Forney, Jr. et al.
patent: 5606466 (1997-02-01), Fisher et al.
patent: 5862192 (1999-01-01), Huszar et al.
patent: 5949820 (1999-09-01), Shih et al.
patent: 6023383 (2000-02-01), Glover et al.
patent: 6101227 (2000-08-01), Glover
patent: 6101229 (2000-08-01), Glover
patent: 6104766 (2000-08-01), Coker et al.
patent: 6108153 (2000-08-01), Glover
patent: 6137843 (2000-10-01), Chennakeshu et al.
patent: 6154870 (2000-11-01), Fredrickson et al.
patent: 6201831 (2001-03-01), Agazzi et al.
patent: 6201839 (2001-03-01), Kavcic et al.
patent: 6282045 (2001-08-01), Glover
patent: 6378107 (2002-04-01), Yoshinaka
patent: 6400288 (2002-06-01), Fredrickson et al.
patent: 6445526 (2002-09-01), Kobayashi et al.
patent: 6501610 (2002-12-01), Sugawara et al.
patent: 6724555 (2004-04-01), Ohta
patent: 20020006173 (2002-01-01), Agazzi et al.
patent: 62241111 (1987-10-01), None
Kuhn, “Magnetic Recording—an Introduction”, http://www.ee.washington.edu/conselec/CE/kuhn/magtape/95×1.htm, Jun. 27, 2002, pp. 1-15.
Zipperian et al., “On the Road to Increasing Areal Density”, file:/Λ\Nick\C\veeco\veeco\html\body on the road.html, Nov. 8, 2000, pp. 1-5.
http://www-unix.ecs.umass.edu/˜vthyagar/wireless/rep/conv.html, “Convoluational Encoding”, Jul. 8, 2000, pp. 1-4.
Boyer Keith Gary
Hennecken Mark A.
Figueroa Natalia
Storage Technology Corporation
Tran Sinh
Yee & Associates P.C.
LandOfFree
Read equalizer optimization based on the PTR effects to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Read equalizer optimization based on the PTR effects to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Read equalizer optimization based on the PTR effects to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3394294