Structure and method for storing data on optical disks
DC
First Claim
1. A spiral groove in an optical disk comprising:
- a wobble, the wobble being a sinusoidal deviation from the centerline of the groove; and
a first plurality of sinusoidal marks located at zero crossings of the wobble, each sinusoidal mark being formed from a sinusoidal deviation of the groove;
wherein the presence of one of the first plurality of sinusoidal marks at one of the zero crossings represents an active bit and the absence of one of the first plurality of sinusoidal marks at one of the zero crossings represents an inactive bit, a plurality of the active bits and the inactive bits encoded to form an information field including at least address information.
7 Assignments
Litigations
0 Petitions
Accused Products
Abstract
During manufacturing of optical disks, mastering equipment inserts marks (“high frequency wobble marks” or “HFWMs”) into the wobble of the groove on optical disks to store data. The presence of a HFWM at a zero crossing of the wobble indicates an active bit and the absence of the HFWM indicates an inactive bit. The zero crossing is, for example, a negative zero crossing. A matched filter is used to detect the shape of the HFWMs. If a HFWM is detected during a wobble cycle, an active bit is saved in a register or a memory. If a HFWM is not detected during a wobble cycle, an inactive bit is saved in a register or a memory. The active and inactive bits may be coded bits that must be decoded to data bits. The data bits include information such as a synchronization mark, a sector identification data, and an error detection code.
51 Citations
11 Claims
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1. A spiral groove in an optical disk comprising:
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a wobble, the wobble being a sinusoidal deviation from the centerline of the groove; and a first plurality of sinusoidal marks located at zero crossings of the wobble, each sinusoidal mark being formed from a sinusoidal deviation of the groove; wherein the presence of one of the first plurality of sinusoidal marks at one of the zero crossings represents an active bit and the absence of one of the first plurality of sinusoidal marks at one of the zero crossings represents an inactive bit, a plurality of the active bits and the inactive bits encoded to form an information field including at least address information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification
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- Resources
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Current AssigneeAdvanced Optical Tracking LLC
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Original AssigneeDPHI Acquisitions, Inc.
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InventorsPleiss, Curtis M., Keeler, Stanton M.
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Primary Examiner(s)Tran, Thang V.
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Application NumberUS09/542,681Time in Patent Office2,122 DaysField of Search369/275.1, 369/59.25, 369/47.35, 369/47.28, 369/275.3, 369/44.11, 369/111, 369/275.4, 369/44.26, 369/47.27, 369/47.22, 369/13.53, 369/13.54, 369/44.13US Class Current369/275.4CPC Class CodesG11B 20/14 using self-clocking codesG11B 20/18 Error detection or correcti...G11B 2220/218 Write-once discsG11B 2220/2545 CDsG11B 2220/2562 DVDs [digital versatile dis...G11B 27/24 by sensing features on the ...G11B 27/3027 used signal is digitally codedG11B 7/0053 Reproducing non-user data, ...G11B 7/00745 Sectoring or header formats...
