图像解码方法以及图像解码装置

Image encoding method and image decoding method

Abstract

一实施方式的图像解码方法和图像解码装置,该图像解码方法包括以下步骤:从应用了交互预测的解码完毕的像素块中,选择相对于解码对象块在空间上在上方向邻接的运动参照块和在左方向邻接的运动参照块;从所述运动参照块中选择可利用块,该可利用块是具有应用到所述解码对象块的运动信息的候选的像素块,且具有相互不同的运动信息;参照根据所述可利用块的数量预先设定的代码表,对所输入的编码数据进行解码,从而求出确定选择块的选择信息;按照所述选择信息,从所述可利用块中选择1个选择块;使用所述选择块的运动信息而生成所述解码对象块的预测图像;以及根据所述编码数据,对所述预测图像与原图像之间的预测误差进行解码。
According to one embodiment, an image encoding method includes a first step of selecting a motion reference block from an already-encoded pixel block to which an inter prediction is applied, the motion reference block including a first motion reference block that is spatially adjacent to an encoding target block in an upward direction and a second motion reference block that is spatially adjacent to the encoding target block in a left direction. The method includes a second step of selecting one or more available blocks from the motion reference block, the available blocks each including a candidate of motion information applied to the encoding target block and different motion information. The method includes a third step of selecting a selection block from the available blocks. The method includes a fourth step of generating a predicted image of the encoding target block using motion information of the selection block. The method includes a fifth step of encoding a prediction error between the predicted image and an original image. The method includes a sixth step of encoding selection information specifying the selection block by referring to a code table decided according to a number of the available blocks.

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