ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD

摘要

An encodI ng method according to an embodiment includes an index setting step, a prediction step, and an encoding step. The index setting step sets an index that represents 5 information of a reference image and a weighting factor. The prediction step predicts so that a reference value of the weicfhting factor when a pixei vaiue change between at least one re fererice image and a target image to be encoded is a specific reference or less is derived as a predicted 10 value. The encoding step encodes a difference value between the weighting factor and the predicted value. v I - A- I 1QI u-ru- I 111 ENCODING CONTROL UNIT 103 TRANSFORMATION : EN INPUT: 10112 103 T SCOEFFICIENT O---------_.--_--- CODED IMAGE: ENCODING DATA _ TRANS- _QUANTIZATION UNITI FORMATION UNIT ENTROPY UNIT |ENCODING 110A 104 INVERSE UNIT TRANSFORMATION QUANTIZATION| PREDICTION COEFFICIENT UNIT INDEX RESTORATION - ~FIGURNG 10B TRANSFORMATION INVERSE UNIT COEFFICIENT ORTHOGONAL 105 - TRANS- '------ -~----- PREDICTED RESTORED UNIT IMAGE PREDICTION PREDICTED IMAGE DECODED GENERATING UNIT WP PARAMETER INDEX INFORMATION INFORMATION REFEA10 SETTING UNIT M TIONMOTION INFORMATION EVALUATING10 ENCODING DEVICE