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.:
Date of Patent:
Dec. 22, 2009
Filed:
Apr. 12, 2004
Shuichi Ohkubo, Tokyo, JP;
Hiromi Honma, Tokyo, JP;
Masatsugu Ogawa, Tokyo, JP;
Masaki Nakano, Tokyo, JP;
Toshiaki Iwanaga, Tokyo, JP;
Yutaka Kashihara, Tokyo, JP;
Yuji Nagai, Tokyo, JP;
Akihito Ogawa, Tokyo, JP;
Shuichi Ohkubo, Tokyo, JP;
Hiromi Honma, Tokyo, JP;
Masatsugu Ogawa, Tokyo, JP;
Masaki Nakano, Tokyo, JP;
Toshiaki Iwanaga, Tokyo, JP;
Yutaka Kashihara, Tokyo, JP;
Yuji Nagai, Tokyo, JP;
Akihito Ogawa, Tokyo, JP;
NEC Corporation, , JP;
Kabushiki Kaisha Toshiba, , JP;
Abstract
Reproduced signals are equalized by the least square technique by using a predetermined number of data samples binarized by a Viterbi decoder. Even when data written on an optical disk is unknown, the data can be equalized in a stable manner and can be reproduced at a low error rate without instability factors such as divergence due to interference.