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:
Sep. 11, 2007
Filed:
Mar. 30, 2006
Terumi Takashi, Kanagawa, JP;
Yoshiju Watanabe, Kanagawa, JP;
Morishi Izumita, Tokyo, JP;
Yasuyuki Itou, Kanagawa, JP;
Terumi Takashi, Kanagawa, JP;
Yoshiju Watanabe, Kanagawa, JP;
Morishi Izumita, Tokyo, JP;
Yasuyuki Itou, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention allow relatively simple circuits to provide a coding device capable of coding longer bit-length data suitably for disk apparatus and a decoding device capable of decoding the data coded by the coding device. In one embodiment, a coding device comprises: a coder which, based on an M bits code string, produces an (M+1) bits coded string where each of the plural bits which may appear in the M bits code string is limited in run length; a preprocessor which produces an M bits code string by removing (N−M) bits respectively from predefined (N−M) positions of an incoming N bits code string and outputs the M bits code string to the coder; and a postprocessor which produces and outputs an (N+1) bits code string by inserting the (N−M) bits, which are removed by the preprocessor, into predefined (N−M) respective insertion positions of the (M+1) bits coded string output from the coder.