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1. (WO2001039188) METHOD AND APPARATUS FOR DATA ERROR RECOVERY USING DEFECT THRESHOLD DETECTOR AND VITERBI GAIN
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/039188 International Application No.: PCT/US2000/031993
Publication Date: 31.05.2001 International Filing Date: 21.11.2000
Chapter 2 Demand Filed: 22.06.2001
IPC:
G11B 20/10 (2006.01) ,G11B 20/18 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20
Signal processing not specific to the method of recording or reproducing; Circuits therefor
10
Digital recording or reproducing
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20
Signal processing not specific to the method of recording or reproducing; Circuits therefor
10
Digital recording or reproducing
18
Error detection or correction; Testing
Applicants:
LING, Khong, Mau [SG/SG]; SG (UsOnly)
NGWE, Myint [MM/SG]; SG (UsOnly)
GAN, Kah, Liang [SG/SG]; SG (UsOnly)
CHALLA, Lakshmi, Anantha [IN/SG]; SG (UsOnly)
CHOO, Quek, Leong [SG/SG]; SG (UsOnly)
SEAGATE TECHNOLOGY LLC [US/US]; 920 Disc Drive Scotts Valley, CA 95066, US (AllExceptUS)
Inventors:
LING, Khong, Mau; SG
NGWE, Myint; SG
GAN, Kah, Liang; SG
CHALLA, Lakshmi, Anantha; SG
CHOO, Quek, Leong; SG
Agent:
MAGEE, Theodore, M.; Westman, Champlin & Kelly, P.A. Suite 1600 International Centre 900 Second Avenue South Minneapolis, MN 55402-3319 , US
Priority Data:
60/166,80322.11.1999US
Title (EN) METHOD AND APPARATUS FOR DATA ERROR RECOVERY USING DEFECT THRESHOLD DETECTOR AND VITERBI GAIN
(FR) PROCEDE ET DISPOSITIF DE RECOUVREMENT D'ERREURS DE DONNEES AU MOYEN D'UN DETECTEUR DE SEUIL DE DEFECTUOSITES ET DE GAIN DE VITERBI
Abstract:
(EN) A method and apparatus are provided for reading from a storage medium (106) to form data values. A signal is generated from a sector on the storage medium (106) and a section of that signal (506) is identified as having a change in amplitude. A gain multiplier (714) is activated to multiply that section of the signal by a gain value. The gain multiplier (714) is deactivated at the end of the section so that the remaining portion of the sector signal is not multiplied by the gain value. This results in a defect adjusted signal that is applied to a detector (716) to detect data values.
(FR) Cette invention concerne un procédé et un dispositif permettant d'établir des valeurs de données par lecture d'un support de stockage (106). Dans un signal généré à partir du support de stockage(106), on identifie une section (506) caractérisée par un changement d'amplitude. Un multiplicateur de gain (714) est activé, qui multiplie ladite section du signal par une valeur de gain. Le multiplicateur de gain (714) est désactivé à la fin de cette section de sorte que la partie restante du signal n'est pas multipliée par la valeur de gain. Il en résulte un signal ajusté en fonction de défauts qui est appliqué à un détecteur (716) pour la détection de valeurs de données.
Designated States: CN, DE, GB, JP, KR, SG, US
Publication Language: English (EN)
Filing Language: English (EN)