IMAGE DECODING DEVICE, IMAGE ENCODING DEVICE, IMAGE DECODING METHOD, IMAGE ENCODING METHOD, PROGRAM, AND INTEGRATED CIRCUIT

摘要

Provided are an image decoding device and an image encoding device capable of smoothly executing parallel processing while utilizing a spatial dependency stepping over a slice boundary. The image decoding device comprises: a first decoding unit (801) for decoding blocks in a first slice; a second decoding unit (802) for decoding blocks in a second slice; and a first storage unit (811) for storing inter-slice periphery information that is information generated by the fact that a boundary block included in the blocks in the first slice and adjacent to the second slice is decoded and is information referred when an inter-slice periphery block included in the blocks in the second slice and adjacent to the boundary block is decoded. The first decoding unit (801) generates the inter-slice periphery information by decoding the boundary block and stores the generated inter-slice periphery information into the first storage unit (811). The second decoding unit (802) refers the stored inter-slice periphery information to decode the inter-slice periphery block.