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. 16, 2021
Filed:
Sep. 26, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Koji Togita, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A coding apparatus capable of improving coding efficiency without calculating a PSNR that is coding distortion. A conversion unit obtains subbands by applying wavelet transform to image data. A control unit decides quantization parameters of the respective subbands within quantization parameter ranges corresponding to image quality modes of the image data. A quantization unit quantizes the subbands obtained by the conversion unit based on the respective quantization parameters decided by the control unit. A coding unit codes quantization image data quantized by the quantization unit.
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