Optical disk, optical disk recording/reproduction apparatus,...

Details Optical disk, optical disk recording/reproduction apparatus,... Optical disk, optical disk recording/reproduction apparatus,...

2007-02-27

2007-02-27

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S059190, C369S053100, C369S124010

Reexamination Certificate

active

10736572

ABSTRACT:
In order to evaluate the quality of a signal recorded on an optical recording medium, a target signal is obtained based on a predetermined data string and a predetermined partial response characteristic, and for each clock cycle, an equalization error is calculated that is a difference between the target signal and a signal reproduced each clock cycle. Further, the product of the equalization errors calculated at different times is obtained, and based on the obtained product, the quality of a signal is evaluated.

REFERENCES:
patent: 5764608 (1998-06-01), Satomura
patent: 2005/0190630 (2005-09-01), Fujimoto et al.

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