| 摘要 |
<p>A picture encoding device (100) is provided, which includes: a unit (110) for selecting a division method of a target region from among a plurality of division methods, and a unit (104) for dividing the target region into a plurality of small regions using the division method, generating a prediction signal in the small region, generating a residual signal between the prediction signal and the original signal of the small region, generating quantized transform coefficients by performing frequency transform and quantization of the residual signal, selecting a map from among a plurality of maps for mapping the quantized transform coefficients of the small region onto leaves of a tree structure that is common to the plurality of division methods in accordance with attribute information of the small region, mapping the quantized transform coefficients of the small region onto the leaves of the tree structure based on the map, and updating the states of the nodes and leaves of the tree structure according to the coefficient values of the respective leaves. The picture encoding device (100) also includes a unit (105) for encoding the states of the nodes and the leaves using a probability model that is common to the plurality of division methods, and a unit (106) for encoding non-zero quantized transform coefficients of the small region.</p> |
