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. 30, 2003
Filed:
Apr. 15, 1999
Takashi Kojima, Tokyo, JP;
Hideki Koyanagi, Kanagawa, JP;
Shigeto Funado, Tokyo, JP;
Yoshihiro Murakami, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention generates coded data having always high image quality irrespective of the change amount of a picture. When a difference between two adjacent frames in inputted picture data is calculated as well as a motion vector between the above frames is calculated, and the picture data is encoded based on the difference and the motion vector between the above frames as well as the motion vector is encoded, a scene change in the above picture data is detected based on the difference between the two adjacent frames in the picture data, and the feature quantity of the picture data is calculated. If the above feature quantity exceeds a prescribed threshold value, the number of pixels of the picture data is reduced in a prescribed conversion ratio at the prescribed timing according to the detected scene change. And the picture data and the motion vector are encoded so as to be the amount of generating codes obtained by allotting the amount of signal of the motion vector representing the movement of the picture data reduced based on the picture data reduced in pixel, to the amount of signal of the picture data.