| 摘要 |
<p>An image signal processing apparatus includes: a block division unit inputting an image signal encoded by orthogonal transformation and dividing the image signal into second blocks different from first blocks encoded using the orthogonal transformation; an activity calculation unit calculating an activity of each second block; a re-encoding unit encoding the second blocks using the orthogonal transformation; a re-encoded difference calculation unit calculating difference values between the second blocks and the first blocks; a class determination unit determining a class of each second block on the basis of a distribution of the difference value and the activity; a prediction coefficient generating unit generating a prediction coefficient corresponding to each class; a prediction tap construction unit constructing a prediction tap for calculating a target pixel in each second block; and a predictive operation unit operating the prediction tap and the prediction coefficient to calculate a pixel value of each target pixel.</p> |
