Optical disk and optical disk apparatus

Details Optical disk and optical disk apparatus Optical disk and optical disk apparatus

2005-06-21

2005-06-21

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Binary pulse train information signal

C369S059230

Reexamination Certificate

active

06909681

ABSTRACT:
In an optical disk, address information, including an address information start mark, is recorded in a header region primarily based on variable-length codes such that, between each pair of nearest bits having a first logic value, at least two and at most seven bits having a second logic value are disposed. The address information start mark is detected based on a first criterion that a combination of pulse widths each defined in association with a nearest pair of bits having the first logic value is present in a pulse sequence, and also based on a second criterion that, when the logic level of the pulse sequence alternates between a first logic level and a second logic level in association with occurrence of bits having the first logic value intermittently disposed among bits having the second logic value, the logic levels of pulses in the pulse sequence coincide with their respective counterparts in the combination of pulse widths.

REFERENCES:
patent: 4615024 (1986-09-01), Usui

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