Optical disc with wobbled tracks and apparatus using this...

Details Optical disc with wobbled tracks and apparatus using this... Optical disc with wobbled tracks and apparatus using this...

2007-03-22

2008-08-12

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S059230, C369S059100, C369S053410, C369S047210

Reexamination Certificate

active

07411889

ABSTRACT:
Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.

REFERENCES:
patent: 6201773 (2001-03-01), Aoki
patent: 2004/0105365 (2004-06-01), Furumiya et al.
patent: 2002-279645 (2002-09-01), None
patent: 2002-342943 (2002-11-01), None
patent: WO 03/079335 (2003-09-01), None
“Data Interchange on 120 mm and 80 mm Optical Disk using +RW Format- Capacity: 4, 7 and 1,46 Gbytes per Side”, Standard ECMA-337, ECMA International Standardizing Information and Communication Systems, Dec. 2002, pp. 27-31.

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