IMAGE CODING DEVICE, IMAGE CODING METHOD, STORAGE MEDIUM, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND STORAGE MEDIUM

摘要

The image quality and coding efficiency are improved in a higher hierarchical layer such as a base layer while independence of coding and decoding of a tile is ensured even during hierarchical coding. An image coding device of the present invention that performs hierarchical coding on an image, which forms a movie, for a plurality of hierarchical layers, includes a first acquiring unit configured to acquire at least one of first and second images of different hierarchical layers from the image; a coding unit configured to code at least one of the first and second images; and a determination unit configured to determine whether or not an independent region, which is coded without reference to other region in an image, is set for each of the images of the respective hierarchical layers. The coding unit codes an image of a coding subject based on a determined result of the determination unit.