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:
Aug. 14, 2007
Filed:
Jan. 15, 2003
Toshiyuki Nakagawa, Kanagawa, JP;
Hiroshige Okamura, Chiba, JP;
Minoru Tobita, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention pertains to a modulation apparatus and method in which the modulation apparatus is realized with a simple circuit structure and is easily applicable to other systems. A pattern conversion unitconverts data having a basic data length of 2 bits supplied from a DSV control bit determination and insertion unitinto a variable-length code having a basic code length of 3 bits in accordance with a conversion table. A minimum-run-length limitation code detection unitdetects, from a data sequence containing a DSV control bit, the position of minimum runs consecutive from a channel bit string converted by the pattern conversion unit. A consecutive-minimum-run replacement unitreplaces a predetermined portion of the channel bit string supplied from the pattern conversion unitfor a predetermined pattern based on the position information supplied from the minimum-run-length limitation code detection unit, and limits the minimum run length to a predetermined number or less. The present invention is applicable to a modulation apparatus.