Optical information reproducing method

Details Optical information reproducing method Optical information reproducing method

2007-06-19

2010-06-15

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal phase processing

C369S059190, C369S275400, C369S059170

Reexamination Certificate

active

07738338

ABSTRACT:
An optical information reproducing method of reproducing multivalued information recorded on a track of an optical information medium having a recording/reproducing region, which has virtual cells arranged thereon at regular spacings. The multivalued information is recorded thereon by changing a length of an information pit in a track direction or an area of the information pit in a cell with the use of a light spot. The multivalued information is reproduced by detecting the level of a multistage reproduced signal from the information pit. The method includes sampling a reproduced signal in the multivalued information recorded in one cell with an M-value (M<N), which is arranged at each of the plurality of cells recorded with an N-value (N≧3) on the track, and detecting a cell center value. A phase error for producing a reproduction clock is obtained on the basis of the detected cell center value, a previously derived ideal value of the cell center value, and a previously derived gradient of the reproduced signal in the vicinity of the ideal value of the cell center value.

REFERENCES:
patent: 5555231 (1996-09-01), Yamamoto
patent: 7065028 (2006-06-01), Schoene et al.
patent: 2003/0210634 (2003-11-01), Shimizu
patent: 2003/0223341 (2003-12-01), Minagawa
patent: 2005/0270959 (2005-12-01), Iwasa et al.
patent: 2006/0280069 (2006-12-01), Yamamoto et al.
patent: 2007/0025217 (2007-02-01), Miyaoka et al.
patent: 2007/0091759 (2007-04-01), Yamamoto et al.
patent: 2007/0171800 (2007-07-01), Okamoto et al.
patent: 2007/0177478 (2007-08-01), Sumioka et al.
patent: 05-128530 (1993-05-01), None
Noburu Sasa et al., “Write-Once Disks for Multi-level Optical Recording”, Proceedings of the International Symposium on Optical Memory, 2003.

Affiliated with

Also associated with

Rating

Optical information reproducing method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical information reproducing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical information reproducing method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4158447