Structure and method for storing data on optical disks

Details Structure and method for storing data on optical disks Structure and method for storing data on optical disks

2006-01-24

2006-01-24

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

Reexamination Certificate

active

06990058

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.

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