The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6791919 B1

PDF
Full Text
Expired
Date of Patent:
Sep. 14, 2004

Filed:

Sep. 25, 2001
Applicant:
Inventors:

Jae-seong Shim, Seoul, KR;

Ki-hyun Kim, Seoul, KR;

Hyun-soo Park, Seoul, KR;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract

A selective disturbance compensating apparatus for use in reproduction from an optical recording medium, and a 3T-correcting method. A DC offset canceller extracts a DC offset from a reproduction signal to cancel the DC offset. An equalizer equalizes the offset-cancelled signal. A switching unit selects between the offset-canceled signal and the equalized signal according to whether distortion caused by asymmetry of the signal is above or below a predetermined reference level. A 3-T correcting unit corrects asymmetry of the selected signal. In another embodiment, a second switching unit selects between the 3-T corrected signal and a Viterbi corrected signal.


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Shim, Jae-seong. (2004). Selective disturbance compensating apparatus used in reproduction from optical recording medium and 3t-correcting method (U.S. Patent No. 6791919). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6791919

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