Method and apparatus for recording address information on...

G - Physics – 11 – B

Patent

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G11B 7/007 (2006.01) G11B 27/19 (2006.01) G11B 27/24 (2006.01) G11B 7/26 (2006.01)

Patent

CA 2408493

In step S1, an address generation block generates and pre-encodes a synchronization signal, address data, and address information composed of an error correction code of the address data which are to be recorded on an optical disc and outputs them to a modulation block. Simultaneously with this, a carrier signal generation block generates a carrier signal for carrying the address information and outputs it to the modulation block. In step 2, the modulation block MSK-modulates the carrier signal input from the carrier signal generation block with the pre-encoded address information input from the address generation block and the obtained MSK-modulated signal is output to a wobble formation block. In step S3, the wobble formation block forms on the optical disc a spiral groove wobbled in accordance with the MSK-modulated signal input from the modulation block. On this optical disc, an arbitrary address can be accessed rapidly.

Dans l'étape S1, un bloc de génération d'adresse génère et pré-code un signal de synchronisation, des données d'adresse et des informations d'adresse composées d'un code de correction d'erreur des données d'adresse à enregistrer sur un disque optique, puis les émet en sortie vers un bloc de modulation. Simultanément, un bloc de génération de signal porteur génère un signal porteur pour porter les informations d'adresse et émet ce signal en sortie vers le bloc de modulation. Dans l'étape S2, le bloc de modulation module en MSK le signal porteur entré à partir du bloc de génération de signal porteur avec les informations d'adresse pré-codées entrées à partir du bloc de génération d'adresse, et le signal modulé MSK obtenus est émis en sortie vers un bloc de formation d'oscillations. Dans l'étape S3, le bloc de formation d'oscillations forme sur le disque optique un sillon en spirale oscillant en fonction du signal modulé MSK entré à partir du bloc de modulation. Sur ce disque optique, on peut accéder à une adresse arbitraire rapidement.

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