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1. WO2005052934 - PARAMETER OPTIMIZATION FOR OPTICAL DISC RECORDING

Publication Number WO/2005/052934
Publication Date 09.06.2005
International Application No. PCT/IB2004/052495
International Filing Date 22.11.2004
IPC
G11B 7/125 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical 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
G11B 7/0045 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
0045Recording
G11B 20/10 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
G11B 20/14 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
14using self-clocking codes
CPC
G11B 20/10009
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
10009Improvement or modification of read or write signals
G11B 20/10037
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
10009Improvement or modification of read or write signals
10037A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
G11B 20/10481
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
10009Improvement or modification of read or write signals
10481optimisation methods
G11B 20/1426
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
14using self-clocking codes
1403characterised by the use of two levels
1423Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
1426conversion to or from block codes or representations thereof
G11B 2020/1457
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
14using self-clocking codes
1403characterised by the use of two levels
1423Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
1426conversion to or from block codes or representations thereof
1457wherein DC control is performed by calculating a digital sum value [DSV]
G11B 2020/1461
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
14using self-clocking codes
1403characterised by the use of two levels
1423Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
1426conversion to or from block codes or representations thereof
14618 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL] (AllExceptUS)
  • TAO, Jing [CN]/[CN] (UsOnly)
  • TANG, Fulong [CN]/[CN] (UsOnly)
  • CHEN, Dianyong [CN]/[CN] (UsOnly)
  • LANGEREIS, Gerardus Rudolph [NL]/[NL] (UsOnly)
Inventors
  • TAO, Jing
  • TANG, Fulong
  • CHEN, Dianyong
  • LANGEREIS, Gerardus Rudolph
Common Representative
  • KONINKLIJKE PHILIPS ELECTRONICS N.V.
Priority Data
200310120724.126.11.2003CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PARAMETER OPTIMIZATION FOR OPTICAL DISC RECORDING
(FR) PROCEDE ET APPAREIL D'OPTIMISATION DE PARAMETRES D'INSCRIPTION SUR DISQUE OPTIQUE
Abstract
(EN)
A method for optimizing writing parameters (1) comprising the following steps: acquiring the variation of a mark runlength (s20, s30); determining a modulation amount of the writing parameters based on a relationship between the variable of the mark runlength and the modulation amount of the writing parameters (s51, s52); and modulating the writing parameters (s60). The method is applicable to multifarious optical disc systems, it can adopt multifarious strategies for the writing process, it can optimize the power, the starting time, and the stopping time of a plurality of laser pulses, thereby optimizing the mark runlength.
(FR)
Procédé d'optimisation des paramètres d'inscription sur disque optique, consistant à effectuer l'acquisition de la variable d'une longueur de plage de repère; à déterminer une quantité de modulation des paramètres d'inscription en fonction d'une relation entre la variable de la longueur de plage de repère et la quantité de modulation des paramètres d'inscription; et à moduler les paramètres d'inscription. Le procédé trouve application dans divers systèmes à disque optique, il peut mettre en oeuvre différentes stratégies pour le processus d'inscription, et il peut optimiser la puissance ou la durée de démarrage et la durée d'arrêt de plusieurs impulsions laser, de manière à atteindre l'objectif consistant à optimiser la longueur de plage de repère.
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