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. 03, 2002
Filed:
Aug. 12, 1999
Applicant:
Inventor:
Satoshi Itoi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 1/00 ; H03L 2/700 ;
U.S. Cl.
CPC ...
H03D 1/00 ; H03L 2/700 ;
Abstract
The PR( ) equalizer receives signals which are provided from a playback head which detects data in which the number of continuous non-inverse bits is at least “2”. The PR( ) equalizer then converts the signals into seven levels of data and ten levels of data, provides them to the four states of Viterbi decoder . In Viterbi decoding, an weight is applied to a metric which is obtained from the seven levels of data or the ten levels of data.