Patent ID: 8358862

Claim:
An image signal processing apparatus comprising: a block division unit that inputs an image signal encoded by orthogonal transformation and that divides the encoded image signal into second blocks different from first blocks encoded using the orthogonal transformation; an activity calculation unit that calculates an activity of each of the second blocks divided by the block division unit; a re-encoding unit that encodes the second blocks divided by the block division unit using the orthogonal transformation; a re-encoded difference calculation unit that calculates difference values between the second blocks re-encoded by the re-encoding unit and the first blocks encoded using the orthogonal transformation; a class determination unit that determines a class of each of the second blocks on the basis of a distribution of the difference value calculated by the re-encoded difference calculation unit and the activity calculated by the activity calculation unit; a prediction coefficient generating unit that generates a prediction coefficient corresponding to each of the classes determined by the class determination unit; a prediction tap construction unit that constructs a prediction tap for calculating a target pixel in each of the second blocks; and a predictive operation unit that operates the prediction tap constructed by the prediction tap construction unit and the prediction coefficient generated by the prediction coefficient generating unit to calculate a pixel value of each of the target pixels.