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:
Nov. 29, 1994
Filed:
Oct. 02, 1992
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348405 ; 348395 ;
Abstract
According to orthogonal transformation coefficients obtained through orthogonal transformation, the degree of influence on visual sensation is detected. Depending on the degree of influence on visual sensation, a quantization step size is controlled so as to assign a greater amount of codes to each block of which image quality deterioration is conspicuous and a smaller amount of codes to each block of which image quality deterioration is less conspicuous.