Power adjustment method, information write method and...

Details Power adjustment method, information write method and... Power adjustment method, information write method and...

2009-09-29

2011-11-01

Tran, Thang (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S059110

Reexamination Certificate

active

08050158

ABSTRACT:
A write power adjustment method makes it possible to set optimum write power with high precision. Trial writing is conducted by using write power Pw,m (where m is an integer) of a plurality of kinds, and a modulation M,m associated with each write power is calculated. Optimum asymptotic power Pasy-opt is calculated by performing predetermined computation by using reference asymptotic power Pasy-ref and reference write start power Pws-ref which are previously determined for each medium. An evaluated value S,m=M,m×(Pw,m−Pasy-opt) is calculated by using the optimum asymptotic power Pasy-opt. Write power Pw that makes the evaluated value S equal to zero when applying straight line approximation to a relation between the write power Pw,m and the evaluated value S,m is calculated as optimum write start power Pws-opt. And optimum write power Pw-opt is found by performing predetermined computation on the optimum write start power Pws-opt.

REFERENCES:
patent: 2004/0017751 (2004-01-01), Matsumoto
patent: 2006/0077836 (2006-04-01), Yu et al.
patent: 2007/0053264 (2007-03-01), Yu
patent: 2007/0115775 (2007-05-01), Baek et al.
patent: 2007/0286042 (2007-12-01), Eto et al.
patent: 2008/0013424 (2008-01-01), Cho et al.
patent: 2008/0130472 (2008-06-01), Wang
patent: 2008/0186817 (2008-08-01), Kuijper
patent: 2007-334922 (2007-12-01), None
Blue-ray Disc Rewritable Format, Part 1, Basic Format Specifications, Blu-ray Disc Founders, Basic Format, Version 1.02, Jun. 2004, pp. 197-200.

Affiliated with

Also associated with

Rating

Power adjustment method, information write method and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4275801