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:
Jan. 28, 2025
Filed:
Apr. 27, 2023
Sharp Kabushiki Kaisha, Sakai, JP;
Yukinobu Yasugi, Sakai, JP;
Tomohiro Ikai, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A moving image decoding method is provided for generating a prediction image using an intra-frame prediction mode. The moving image decoding method includes deriving a first parameter and a second parameter by using a sampled luminance value down-sampled according to a chrominance format and the intra-frame prediction mode; and deriving the prediction image by using the first parameter and the second parameter, wherein: the first parameter is derived by: deriving a logarithmic value of a luminance difference value, deriving a first value by right-shifting a second value related to the luminance difference value by the logarithmic value, and using a third value acquired by multiplying a fourth value by a chrominance difference value, wherein the fourth value is determined from a reference table by using the first value, and the second parameter is derived by using the first parameter.