Reproduced signal evaluation method and write adjustment method

Details Reproduced signal evaluation method and write adjustment method Reproduced signal evaluation method and write adjustment method

2010-07-15

2011-12-27

Bibbins, Latanya (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S059120

Reexamination Certificate

active

08085641

ABSTRACT:
The present invention aims to provide a reproduced signal evaluation method and a write adjustment method for offering a Blu-ray disc having a large storage capacity with excellent media compatibility. An evaluation index L-SEAT is calculated through signed addition using a Euclidean distance difference calculated from at least one of target signals in which a focused edge is shifted to the right and left, and the quality of the reproduced signal is evaluated based on the evaluation index. Write condition adjustment using the index enables write adjustment not depending on SNR and achieving high adjustment accuracy.

REFERENCES:
patent: 7869327 (2011-01-01), Miyashita et al.
patent: 2003/0067998 (2003-04-01), Nakajima et al.
patent: 2003/0090980 (2003-05-01), Kashihara et al.
patent: 2005/0249318 (2005-11-01), Minemura
patent: 2007/0234188 (2007-10-01), Shiraishi
patent: 2010/0260025 (2010-10-01), Minemura et al.
patent: 1 575 176 (2005-09-01), None
patent: 2 242 053 (2010-10-01), None
patent: 2 249 343 (2010-11-01), None
patent: 2003-141823 (2003-05-01), None
patent: 2003-151219 (2003-05-01), None
patent: 2005-196964 (2005-07-01), None
patent: 2005-346897 (2005-12-01), None
U.S. Appl. No. 12/568,977, Sep. 29, 2009, Minemura et al.
U.S. Appl. No. 12/569,021, Sep. 29, 2009, Minemura et al.
Harumitsu Miyashita et al.; Signal Qualification Method for Partial-Response Maximum-Likelihood Read/Write Channel, Japanese Journal of Applied Physics, 2004, pp. 4850-4851, vol. 43, No. 7B.
Shiraishi, J. et al “Signal quality evaluation method for over-30-GB Blu-ray discs”, Japanese Journal of Applied Physics, Part 1, Japan Soc. Appl. Phys. Japan, vol. 45, No. 28 Feb. 2006, pp. 1066-1070.

Affiliated with

Also associated with

Rating

Reproduced signal evaluation method and write adjustment 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 Reproduced signal evaluation method and write adjustment method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reproduced signal evaluation method and write adjustment method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4308271