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:
Dec. 03, 1996
Filed:
Aug. 21, 1995
Applicant:
Inventor:
Mikio Togami, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; H03M / ; H04N / ;
U.S. Cl.
CPC ...
371 43 ; 375341 ; 386113 ;
Abstract
A data detection apparatus has an A/D (analog to digital) converter which samples and quantizes the output of a low-frequency-emphasizing-type equalization circuit and a digital filter which processes the output of the A/D converter. A Viterbi decoder performs Viterbi decoding of the digital output filter and determines a branchmetric on the basis of an equalization error.