Back to results
US 7,068,589 B2Granted
Optical disc and optical disc address reading apparatus and method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShigeru Furumiya, Hiromichi Ishibashi
Life of this patent
Estimating the term…
Abstract
An optical disc is provided having marks for dispersed addresses that can be easily detected with high precision. A dispersed address includes synchronization marks, positive marks, and negative marks. The synchronization marks, positive marks, and negative marks are formed along a groove as partial discontinuities or partial modifications in the wobbled groove.
Claims10
An information media comprising:
- a track;
- and
- a wobbled groove formed along said track;
- wherein said wobbled groove contains positive marks formed in a specific plurality of units each having predetermined length, and negative marks formed in a different specific plurality of units each having predetermined length, said positive and said negative marks being used for presenting position information in said information media.
1 more element
An information media comprising:
- a track;
- and
- a wobbled groove formed along said track;
- wherein said wobbled groove contains positive marks formed in a specific plurality of units each having predetermined length;
- wherein a positive mark is indicated by a groove section, in which the wobbling of the groove, compared to a sinusoidal wobbling, contains a steeper outward inclination, and
- wherein said positive marks are used for presenting position information in said information media.
3 more elements
An information media comprising:
- a track;
- and
- a wobbled groove formed along said track;
- wherein said wobbled groove contains negative marks formed in a specific plurality of units each having predetermined length;
- wherein a negative mark is indicated by a groove section, in which the wobbling of the groove, compared to a sinusoidal wobbling, contains a steeper inward inclination, and
- wherein said negative marks are used for presenting position information in said information media.
3 more elements
Dependencies are inferred from the claim text.