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1. WO2003019543 - PROCEDE D'ENREGISTREMENT SUR DES DISQUES OPTIQUES MULTICOUCHES A CHANGEMENT DE PHASE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS:

1. A method for formatting and recording on a multi-layer phase-change optical disc (10), the method comprising a step in which an area on a first layer (12) and an area on a second layer (18) of the optical disc (10) are recorded, characterized in that the areas are recorded according to a predefined sequence such that an area of the first layer (12) where through an incident radiation beam (16) passes is always fully written or fully empty upon recording an area on the second layer (18) in order to prevent interference with the incident radiation beam (16) from the first layer (12) upon recording on the second layer (18).

2. A method as claimed in claim 1 , characterized in that the method comprises a step in which the first layer (12) is completely written before writing on the second layer

(18).

3. A method as claimed in claim 2, characterized in that the first layer (12) is completely written with at least one of de-ice, preformat and user information.

4. A method as claimed in claim 1, characterized in that the method comprises a step in which non-commencement of writing on the second layer (18) is confirmed before writing on the first layer (12).

5. A method as claimed in claim 1, characterized in that the method comprises a step in which writing on the first layer (12) is started upon confirmation of non-commencement of writing on the second layer (18).

6. A method as claimed in claim 1, characterized in that the method comprises a step in which writing on the second layer (18) is started upon completion of writing on the first layer (12).

7. A method as claimed in claim 1 , characterized in that the method comprises a step of allowing pregroove addresses for the first (12) and the second (18) layer to increase from an inside diameter of each layer (12, 18) to an outside diameter of each layer (12, 18), and a step of defining a separate de-ice address for each of the first (12) and the second (18) layers, so that de-icing of the first layer (12) always progresses by a pre-defined amount ahead of de-icing on the second layer (18).

8. A method as claimed in claim 1 , characterized in that the method comprises a step in which pre-determined areas on inner and outer diameters of the second layer (18) that are reserved for non-user data are pre-formatted before commencing the writing on the first recording layer (12);
a step in which a first de-ice address is defined for the second layer (18), which first address indicates until which position the second layer (18) is de-iced, and a second de-ice address is defined for the second layer (18), which second address indicates which position the second layer (18) is de-iced;
and a step in which the first layer (12) is fully de-iced above de-iced areas at inner and outer radii of the second layer (18) before ejecting the disc from a recording or reading device.

9. A method as claimed in claim 1, characterized in that the method comprises a step in which pre-determined areas on the second layer (18) that are reserved for non-user data, consisting of at least one of a guard bank area, a lead-in area, a lead-out area, a defect management area, a file format area, and a navigation reserve area, are preformatted.

10. A method as claimed in claim 1, characterized in that the method comprises a step in which non-commencement of writing on the first layer (12) is confirmed.

11. A method as claimed in claim 1 , characterized in that the method comprises a step in which, if non-commencement of writing on the first layer (12) is confirmed, the areas reserved for non-user data at the inner and outer diameters on the second layer (18) are preformatted.

12. A method as claimed in claim 1, characterized in that the method comprises a step in which two de-ice addresses for the second layer (18) are defined, one address thereof indicating a position on the second layer (18) until which the second layer (18) is de-iced while the other address indicates a position on the second layer (18) from which the second layer (18) is de-iced.

13. A method as claimed in claim 1, characterized in that the method comprises a step in which complete de-icing of the first layer (12) above de-iced areas at inner and outer radii of the second layer (18) as indicated by the de-ice addresses is confirmed.

14. A method as claimed in claim 1, characterized in that the method comprises a step in which the disc is ejected from a device upon confirmation that the first layer (12) is fully de-iced above de-iced areas at inner and outer radii of the second layer (18).

15. A method as claimed in claim 1, characterized in that the method comprises a step in which the first layer (12) is completely written before commencing the writing of user-definable data on the second layer (18).

16. A method as claimed in claim 1, characterized in that the method comprises a step in which non-commencement of writing of user-definable data on the second layer (18) is confirmed.

17. A method as claimed in claim 1 , characterized in that the method comprises a step in which non-commencement of writing of user-definable data on the second layer (18) is confirmed and writing on the first layer (12) is started.

18. A method as claimed in claim 1 , characterized in that the method comprises a step in which writing user-definable data on the second layer (18) is started upon completion of filling of the first layer (12).

19. A recording device for formatting and recording on a multi-layer phase-change optical disc (10), the device comprising means (31,3, 52) for recording an area on a first layer (12) and an area on a second layer (18) of the optical disc (10), characterized in that the recording device also comprises means (56) for executing a method according to any one of the preceding claims.