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:
Jul. 08, 2014
Filed:
Sep. 19, 2008
Katsumi Otsuka, Kawasaki, JP;
Katsumi Otsuka, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention generates encoded data that properly conforms to pre-specified image quality and suppresses a large change in image quality. An encoding unit encodes pictures block by block according to a parameter. A distortion amount calculation unit calculates a picture distortion amount between a decoded picture and a picture before being encoded. A scene distortion amount calculation unit calculates a scene encoding distortion amount from the picture distortion amounts of a plurality of pictures having been encoded. A distortion bit rate conversion unit calculates a corrected bit rate by calculating a difference between a target distortion amount and the calculated scene encoding distortion amount, and multiplying the calculated difference by a coefficient. A target bit rate calculation unit calculates a bit rate for a picture subsequent to a picture of interest by adding a current target bit rate to the corrected bit rate, and sets it as the parameter.