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:
Jan. 14, 2003
Filed:
Jun. 15, 1999
Eric Majani, Rennes, FR;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention proposes a digital filter adapted to transform an input digital signal into two output digital signals. The input digital signal includes input samples (x ). The first output digital signal includes output samples (y ) of odd ranking, each equal to the input sample (x ) of the same ranking decreased by the approximate value of a sum of input samples of even ranking respectively multiplied by first filtering coefficients (p ). The second output digital signal includes output samples (y ) of even ranking, each equal to the input sample (x ) of the same ranking decreased by the approximate value of a sum of output samples of odd ranking respectively multiplied by second filtering coefficients (u ). The second filtering coefficients (u ) are chosen from all the following sets of coefficients: (5/16, 5/16), (−1/16, 5/16, 5/16, −1/16) and (1/256, −15/256, 78/256, 78/256, −15/256, 1/256).