| 摘要 |
This decoding device is provided with a decoding means which decodes compressed data of a residue signal and direction information of intra-screen prediction of a target block, a prediction signal generation means which generates an intra-screen prediction signal from said direction information and an already-reproduced reference sample of an adjacent block, a residue signal restoring means which restores a reproduced residue signal of the target block, and a block storage means which restores and stores the pixel signal of the target block, wherein the prediction signal generation means acquires a reference sample from an already-reproduced block in the periphery of the stored target block, selects two or more key reference samples, interpolates between the key reference samples in order to generate an interpolated reference sample, and generates the intra-screen prediction by extrapolating the interpolated reference sample on the basis of the direction of the intra-screen prediction. |
