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:
Apr. 17, 2012
Filed:
Feb. 26, 2007
Tomoyuki Shindo, Yokohama, JP;
Tomoyuki Shindo, Yokohama, JP;
Victor Company of Japan, Ltd., Kanagawa-Ken, JP;
Abstract
Activities of a video signal are obtained for subblocks of each macroblock of each picture. The smallest activity is detected as an input-picture activity per macroblock. Obtained are activities of a motion-compensated predictive signal per first picture and activites of the video signal per second picture, for the subblocks of each macroblock. A mean value of the activities is obtained per macroblock for each picture, as an error activity per macroblock. A mean error activity is obtained for error activities per picture. A quantization step size for quantization of the video signal is adjusted per macroblock, according to the input-picture activity, to obtain a smaller step size when the error activity is equal to or larger than the mean error activity than when the former is smaller than the latter.