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:
Jun. 19, 2012
Filed:
Jul. 06, 2007
Hiromu Hasegawa, Osaka, JP;
Nobuyuki Takasu, Osaka, JP;
Mayumi Okumura, Osaka, JP;
Akira Okamoto, Osaka, JP;
Takashi Matsumoto, Tokyo, JP;
Norihiko Nagai, Tokyo, JP;
Hiromu Hasegawa, Osaka, JP;
Nobuyuki Takasu, Osaka, JP;
Mayumi Okumura, Osaka, JP;
Akira Okamoto, Osaka, JP;
Takashi Matsumoto, Tokyo, JP;
Norihiko Nagai, Tokyo, JP;
MegaChips Corporation, Osaka-shi, JP;
NTT Electronics Corporation, Tokyo, JP;
Abstract
A quantization step determination part inputs an evaluation value (ACT_MB) indicating the dispersion in a macroblock and its average value (ACT_PIC). A subtracter obtains the difference between these values, and a multiplier multiplies the difference by r(<1) to obtain a weighting value. Next, an adder adds the weighting value to an average quantization step value of source data, and finally a multiplier multiplies the sum by a step value adjustment factor α (>1) to obtain a converted quantization step value (Qstep_AVC). This optimizes a bit allocation in accordance with an Activity value of the macroblock, to thereby improve the quality of image.