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:
Mar. 05, 2024
Filed:
Dec. 18, 2019
Applicant:
Sony Group Corporation, Tokyo, JP;
Inventor:
Yoshitaka Morigami, Tokyo, JP;
Assignee:
SONY GROUP CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 19/124 (2014.01); H04N 19/129 (2014.01); H04N 19/147 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/154 (2014.01);
U.S. Cl.
CPC ...
H04N 19/124 (2014.11); H04N 19/129 (2014.11); H04N 19/147 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/154 (2014.11);
Abstract
A scaling unit () (quantization processing unit) quantizes a coding target image divided into blocks. A coefficient determination unit () (coefficient change unit) changes a coefficient value in a specific frequency range among quantization coefficients corresponding to respective sub-blocks calculated by the scaling unit () by quantization. Thus, the image coding device () determines a final position of a coefficient just by counting the number of appearances of non-zero coefficients, and thus corrects the quantization coefficients without correcting coding distortion by iterative operation.