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:
Jun. 05, 2012
Filed:
Jan. 30, 2007
Roy D. Cideciyan, Zurich, CH;
Thomas Mittelholzer, Zurich, CH;
Paul J. Seger, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Error correction coding is provided for codeword headers in a data tape format, such as a Linear Tape-Open, Generation 4 (LTO-4) data tape format. The data tape format defines a codeword quad as having first and second codeword headers interleaved with first and second codeword pairs, each codeword header comprising N bytes c=c, c, . . . , c, cwherein K bytes c-cof the first and second headers in a codeword quad differ such that if one is known the other can be inferred. Each header byte cof a codeword quad is redefined as comprising two interleaved (m/2)-bit nibbles, e, o. For each header, nibbles e-eand nibbles o-oare generated as a function of nibbles, e-eand o-o, respectively. A codeword is assembled with the redefined headers the codeword quad is then recorded onto a recording medium.