| 摘要 |
To enable obtaining a decoded picture of further improved picture quality. ÄMeans for SolutionÜ A prediction tap generating circuit 32 uses one of pixels constituting an SD picture obtained thinning an HD picture by a thinning circuit 31, as a notable pixel, and forms plural patterns of prediction taps with respect to the notable pixel. A classification adaptive processing circuit 33 carries out adaptive processing for finding a prediction value of the HD picture by linear combination between the prediction tap and a predetermined prediction coefficient. A prediction error calculating circuit 34 calculates a prediction error of the prediction value obtained from each of the plural patterns of prediction taps with respect to the HD picture. A tap pattern code appending circuit 36 appends a pattern code corresponding to a prediction tap pattern with which a minimum prediction error is obtained, from among the plural patterns of prediction taps, to the pixel value of the notable pixel. <IMAGE> |
