Sony Group Corporation
IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING APPARATUS, AND IMAGE DECODING METHOD

Abstract:

The present disclosure relates to an image encoding apparatus, an image encoding method, an image decoding apparatus, and an image decoding method that make it possible to suppress image quality deterioration while reducing a processing amount of an inter-prediction process using subblocks. Subblock size identification information identifying a size or a shape of subblocks used for an inter-prediction process on an image is set on a basis of a motion vector used for motion compensation in an affine transformation, the image is encoded by performing the inter-prediction process of applying the affine transformation on the subblocks with the size or the shape according to the setting, and a bitstream including the subblock size identification information is generated. The present technology can be applied to an encoding apparatus that encodes images, and a decoding apparatus that decodes images, for example.