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:
Sep. 23, 2025
Filed:
Dec. 14, 2021
Sharp Kabushiki Kaisha, Sakai, JP;
Tianyang Zhou, Sakai, JP;
Tomohiro Ikai, Sakai, JP;
Eiichi Sasaki, Sakai, JP;
Tomoko Aono, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
Provided are an image decoding apparatus () and an image coding apparatus () in which both transform precision and residual coding efficiency are preferable. Included are a TU decoder () configured to decode, from coded data, a syntax element representing an absolute value of a transform coefficient, a scaling unit () configured to multiply a transform coefficient by a quantization-parameter dependent value and perform right-shift by a first shift value, and to perform clipping using a minimum value and a maximum value according to a first range, and an inverse conversion processing unit () configured to convert a scaled transform coefficient, perform clipping using the minimum value and the maximum value according to the first range to derive an intermediate coefficient, further transform an intermediate variable, and perform right-shift by a second shift value. The scaling unit () derives the first range, the first shift value, and the second shift value in accordance with a value of a first bit-depth, and limits the first range to be equal to or less than a prescribed value.