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. 15, 1998
Filed:
Oct. 29, 1997
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
375229 ; 375341 ; 371 431 ; 360 46 ; 360 65 ;
Abstract
A signal processing apparatus for performing maximum likelihood decoding using one of a partial response PR(1,1) scheme and a partial response PR(1,0,1) scheme, has a maximum likelihood decoding device which includes a comparison circuit for comparing a branch metric difference supplied from an external circuit and a held past metric difference, a holding circuit for holding, as a new metric difference, one of the branch metric difference supplied from the external circuit and the held past metric difference on the basis of a comparison output from the comparison circuit, and a deciding circuit for deciding decoded data on the basis of the comparison output from the comparison circuit.