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:
May. 16, 2006
Filed:
Apr. 11, 2003
Koubun Sakagami, Kanagawa, JP;
Yuichi Kadokawa, Kanagawa, JP;
Koubun Sakagami, Kanagawa, JP;
Yuichi Kadokawa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A recording medium with a data format is provided. The data format includes frames and an ECC block. Each of the frames includes a plurality of n-level data, n being an integer satisfying n≧3, a clock mark that is n-level data for sampling the n-level data, and a frame sync that is n-level data for indicating a break point of the n-level data of a predetermined amount. The ECC block is a data block for error correction using a product code. The ECC block is formed by binary data of J×K words, where J is a natural number indicating the number of valid binary data in each frame, and K is a natural number indicating the number of frames when the n-level data are converted into binary data.