IMAGE DECODING DEVICE, IMAGE DECODING METHOD, IMAGE ENCODING/DECODING METHOD AND IMAGE DECODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image decoding device which improves efficiency by reducing the quantity of information.SOLUTION: The image decoding device is configured to decode a signal obtained by performing orthogonal transformation/quantization/encoding of an input image signal formed from a plurality of unit blocks including a plurality of pixels. The image decoding device comprises inter-signal prediction means for determining whether a reference signal can be selected from a signal separated into color signals and whether inter-signal prediction can be applied to each signal to be predicted on the basis of intra-signal prediction information for performing intra-signal prediction on each of pixels on the basis of a reconstituted image signal. An image signal is obtained which is decoded from information of the inter-signal prediction and information of the intra-signal prediction by performing inter-signal compensation and intra-signal compensation.