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. 17, 1999
Filed:
Jun. 24, 1997
Applicant:
Inventors:
Takushi Nishiya, Machida, JP;
Hideyuki Yamakawa, San Jose, CA (US);
Shoichi Miyazawa, deceased, late of Yokohama, JP;
Seiichi Mita, Kanagawa-ken, JP;
Yoichi Uehara, Maebashi, JP;
Takashi Nara, Takasaki, JP;
Akihiko Hirano, Odawara, JP;
Assignee:
Hitachi Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
371 437 ;
Abstract
A calculation concerning the input of a signal is removed from a branch metric calculation processing on a trellis diagram of an extended partial response class, and the calculation of branch metrics and the selection of survivor paths can be carried out by the subtraction of the survivor paths and the comparison of constants.