Importance

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Abstract

In order to help maximize the capacity of an optical storage device, and increase the efficiency of addressing, a unique addressing scheme is utilized to provide addressing for an optical storage disk. Importantly, this scheme is compatible with multilayer disks and helps to minimize the potential for errors. In the addressing scheme of the present invention, the storage media is provided with a wobbled groove, which includes addressing information for the media. More specifically, the surface of the media is divided into predetermined sections, or portions, each portion having a selected number of wobble periods. Within these wobble periods, the amplitude of one single wobble period is either reduced or eliminated. The location of this reduced or eliminated wobble signal can then be determined by the readout system of the present invention and utilized to provide addressing information. A look-up table is provided, which includes a corresponding address value for each predetermined wobble period within a defined address frame. By determining the location of the zero or reduced wobble period within the address frame, an address value can be determined by that particular frame period by providing a number of frames adjacent to one another, a specific address is provided. Utilizing this mechanism, robust detection is provided since a differential detection can be easily utilized, and complex modulation techniques are not required.

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First Claim