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:
Jul. 17, 2007
Filed:
Nov. 15, 2005
Morishi Izumita, Tokyo, JP;
Terumi Takashi, Kanagawa-ken, JP;
Yasuyuki Itou, Kanagawa, JP;
Masaharu Kondou, Kanagawa-ken, JP;
Morishi Izumita, Tokyo, JP;
Terumi Takashi, Kanagawa-ken, JP;
Yasuyuki Itou, Kanagawa, JP;
Masaharu Kondou, Kanagawa-ken, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention a signal processing method capable of realizing low decoding error ratio by using a simple configuration free from unnecessary redundant bits. In one embodiment, user data (512 bytes+additional data) input to an input terminal is RLL-encoded by a RLL encoder. The data from the RLL encoderis entered into a symbol error correction encoder where 9-bit symbol encoding is done. Its RS code portion is RLL-encoded by a RLL encoder. Signal read from a magnetic disk is entered into a RLL decoderwhere the RS code portion is RLL-decoded. The signal from the RLL decoderis then entered into a symbol error correction decoder where random read/write errors, burst errors attributable to defects and other errors are corrected to produce a (user data+RLL) signal. This data is output to an output terminal after being decoded by a RLL decoder