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. 17, 1989
Filed:
Jun. 15, 1988
Applicant:
Inventors:
Shuichi Matsumoto, Fujimi, JP;
Hitomi Murakami, Yokohama, JP;
Assignee:
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358133 ; 358 36 ; 358135 ; 358167 ; 375 34 ;
Abstract
A noise-shaping predictive coding system is disclosed, in which the deviation (i.e. correlation) of quantization representative values, which occurs when the coding noise resulting from predictive coding is frequency-shaped by a noise shaping filter, is used to perform an coding operation, so that the quantization entropy can be reduced simultaneously. According to another aspect of the present invention, the human visual characteristic may be combined with the deivation of quantization representative values.