IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND IMAGE ENCODING DEVICE.

摘要

An efficient encoding/decoding process that reduces the size of encoded images when using asymmetric partitioning and takes advantage of the properties of asymmetric partitioning is implemented. An image decoding device that is provided with a motion-compensation parameter derivation unit that derives a motion-compensation parameter that indicates a prediction scheme, namely either unidirectional or bidirectional prediction. If the size of prediction units is less than or equal to a prescribed size, the motion-compensation parameter derivation unit switches prediction schemes for the derivation of the motion-compensation parameter.