APPARATUS AND METHOD FOR PROCESSING IMAGE SIGNAL, DEVICE AND METHOD FOR GENERATING COEFFICIENT DATA TO BE USED FOR SAME, AND PROGRAM FOR IMPLEMENTING EACH METHOD

摘要

PROBLEM TO BE SOLVED: To satisfactorily reduce the coded noise of an image signal obtained by decoding the coded digital picture signal.

SOLUTION: A second processing section 122 conducts processing for converting the image signals Va(P) and Va(B) of a P picture and a B picture into the image signals Vb(P) and Vb(B) of the P picture and the B picture having the reduced coded noise. The second processing section 122 selectively derives the pixel data of a prediction tap and a class tap located around the space direction and the time direction with respect to an attentional position in the image signal Vb(P)/Vb(B) on the basis of the image signals Vb(I) and Vb(P) of an I picture and the P picture corresponding to the image signal Va(P)/Va(B) and the image signals Va(I) and Va(P) of the I picture and the P picture used in obtaining the image signals Va(P)/Va(B). An arithmetic circuit 145 obtains the pixel data y of the attentional position in the image signals Vb(P)/Vb(B) on the basis of a presumption formula by using the pixel data xi of the prediction tap and coefficient data Wi read by a class code CL2 from a coefficient memory 144.

COPYRIGHT: (C)2004,JPO