Disc-shaped recording medium disc driving device and method...

G - Physics – 11 – B

Patent

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Details

G11B 7/007 (2006.01) G11B 7/24 (2006.01) G11B 7/26 (2006.01) G11B 20/12 (2006.01) G11B 20/14 (2006.01) G11B 27/19 (2006.01) G11B 27/24 (2006.01) G11B 27/30 (2006.01)

Patent

CA 2430904

The information such as address is to be efficiently formed into wobble components and further the S/N ratio in reproducing the information formed into the wobble components is to be improved. In an optical disc of the present invention, there are recorded in a wobble the address information modulated in accordance with the MSK (minimum shift keying) system and the address information modulated in accordance with a modulation system in which even harmonics signals are added to a sinusoidal carrier signal and in which the polarity of the harmonics signal is changed depending on the sign of the data for modulation.

La présente invention a pour but de constituer efficacement des informations, telles que l'adresse, en composants d'oscillation et d'améliorer le rapport signal sur bruit, lors de la reproduction des informations constituées dans les composants d'oscillation. Dans un disque optique selon l'invention, sont enregistrées dans une oscillation les informations d'adresse modulées conformément au système de modulation à déphasage minimal (MSK) ainsi que les informations d'adresse modulées conformément à un système de modulation dans lesquelles les signaux harmoniques égaux sont ajoutés à un signal porteur sinusoïdal et dans lequel la polarité du signal harmonique est modifiée en fonction du signe des données devant être modulées.

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