WO2005008648 RECORD CARRIER, DEVICE AND METHOD FOR CORRECTING SIGNED DEVIATION

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Publication Number WO/2005/008648

Publication Date 27.01.2005

International Application No. PCT/IB2004/051232

International Filing Date 15.07.2004

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KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL] (AllExceptUS)
SCHREURS, Gerard, E., N. [BE]/[BE] (UsOnly)
LANGEREIS, Gerardus, R. [NL]/[NL] (UsOnly)

Inventors

SCHREURS, Gerard, E., N.
LANGEREIS, Gerardus, R.

Agents

UITTENBOGAARD, Frank

Priority Data

03102199.1

17.07.2003

Publication Language English (en)

Filing Language English (EN)

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Title

(EN) RECORD CARRIER, DEVICE AND METHOD FOR CORRECTING SIGNED DEVIATION

(FR) SUPPORT D'ENREGISTREMENT, DISPOSITIF ET METHODE DE CORRECTION DE VALEURS SIGNEES DE DEVIATION

Abstract

(EN) A device for recording information in a track on a record carrier writes and reads marks and spaces each having a nominal run length. The device has a detection unit (32) for generating a signed deviation value signal (34) indicative for a position deviation of a starting edge of a mark and/or an ending edge of a mark with respect to a nominal, position of said edge. A calculation unit (31) selects at least one predefined run length pattern and determines a correction signal (33) based on at least one statistically calculated parameter of the signed deviation value signal for the selected run length pattern. A radiation source control unit (29) controls the power of the radiation source during said writing based on the correction signal.

(FR) Ce dispositif d'enregistrement d'informations sur une piste d'un support d'enregistrement inscrit et lit des marques et des espaces ayant chacun une longueur nominale de plage. Le dispositif comprend une unité de détection (32) pour générer un signal (34) relatif à une valeur signée de déviation qui indique une déviation dans la position du bord initial d'une marque et/ou du bord final d'une marque par rapport à la position nominale du bord en question. Une unité de calcul (31) sélectionne au moins un modèle prédéfini de longueurs de plage et détermine un signal de correction (33) sur la base d'un paramètre statistiquement calculé du signal relatif à la valeur signée de déviation du modèle sélectionné de longueurs de plage. Une unité (29) de commande de la source de rayonnement règle la puissance de la source de rayonnement pendant l'inscription sur la base du signal de correction.

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

G	PHYSICS
11	INFORMATION STORAGE
B	INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
11	Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
10	using recording by magnetic means ; or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
105	using a beam of light or a magnetic field for recording ; by change of magnetisation; and a beam of light for reproducing, ; i.e. magneto-optical,; e.g. light-induced thermo-magnetic recording, ; spin magnetisation recording,; Kerr ; or Faraday; effect reproducing
10502	characterised by the transducing operation to be executed

G	PHYSICS
11	INFORMATION STORAGE
B	INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
11	Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
10	using recording by magnetic means ; or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
105	using a beam of light or a magnetic field for recording ; by change of magnetisation; and a beam of light for reproducing, ; i.e. magneto-optical,; e.g. light-induced thermo-magnetic recording, ; spin magnetisation recording,; Kerr ; or Faraday; effect reproducing
10595	Control of operating function

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
10009	Improvement or modification of read or write signals
10046	filtering or equalising, e.g. setting the tap weights of an FIR filter
10212	compensation for data shift (e.g. pulse crowding effects)

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1. WO2005008648 - RECORD CARRIER, DEVICE AND METHOD FOR CORRECTING SIGNED DEVIATION

G	PHYSICS
11	INFORMATION STORAGE
B	INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7	Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
12	Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125	Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
126	Circuits, methods or arrangements for laser control or stabilisation
1267	Power calibration