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:
Oct. 14, 2008
Filed:
Mar. 20, 2003
Koichi Takagi, Saitama, JP;
Sei Naitou, Saitama, JP;
Masahiro Wada, Saitama, JP;
Shuuichi Matsumoto, Saitama, JP;
Gouichi Ishihara, Saitama, JP;
Koichi Takagi, Saitama, JP;
Sei Naitou, Saitama, JP;
Masahiro Wada, Saitama, JP;
Shuuichi Matsumoto, Saitama, JP;
Gouichi Ishihara, Saitama, JP;
KDDI R&D Laboratories, Inc., Saitama, JP;
Abstract
The present invention provides a quantization control system for video coding, for optimizing bit allocation based on visual priority which expresses at high precision human visual characteristics for videos, thereby improving subjective image quality of the whole image even with a limited number of bits. An object is extracted from a picture of an input image (S) and a gaze parameter V(j) for the extracted object is calculated (S). Then, a texture attribute parameter t(k) of each macroblock included in the object is calculated (S). The gaze parameter V(j) and texture attribute parameter t(k) are used to calculate a visual priority parameter w(k) for each macroblock. Based on this parameter w(k), a quantization parameter is determined.