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:
May. 21, 2002
Filed:
Sep. 19, 1996
Eri Murata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A moving picture coding system for controlling a quantizer in response to a generated bit amount is improved in that moving pictures are coded depending on whether frames of the moving pictures attach greater importance on the motion smoothness or on the image clarity. A quantization variation value which is a variation of a quantization step size between different frames is calculated by a variation value calculation section from a bit amount calculated by a generated bit amount calculation section. The quantization variation value is positive or negative in sign with a frame which involves a great amount or a small amount of variation. Only when the quantization variation value is positive or negative in sign, the frame is determined by a variation value correction frame determination section as a frame for which correction of the variation value should be performed. For a frame for which correction of the variation value should be performed, correction is performed by a variation value correction section so that the absolute value of the variation value is greater than that of the last frame, and the thus corrected variation value is transmitted to a quantization determination section.