MOVING IMAGE DECODING DEVICE, MOVING IMAGE ENCODING DEVICE, AND ANGLE MODE DERIVATION DEVICE

• Main Authors: IGAI TOMOHIRO, YASUGI MASANOBU, AONO TOMOKO
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

To solve a problem that conventional angle mode derivation needs a plurality of times of comparison of a magnitude relation to convert the gradient of pixel values to an angle mode, which inhibits parallel processing.SOLUTION: An angle mode derivation device comprises: a gradient derivation unit which derives the gradient of pixel values included in a gradient derivation target image; and an angle mode derivation unit which derives an angle mode by using a first gradient derived by the gradient derivation unit, a second gradient different from the first gradient, and two predetermined tables.SELECTED DRAWING: Figure 6 【課題】従来の角度モード導出では、画素値の勾配を角度モードに変換するために大小関係の比較が複数回必要であり並列処理の妨げとなっていた。【解決手段】勾配導出対象画像に含まれる画素値の勾配を導出する勾配導出部を備え、勾配導出部の導出する第１の勾配と、第１の勾配とは異なる第２の勾配、と２つの所定のテーブルを用いて角度モードを導出する角度モード導出部を備えることを特徴とする【選択図】図6