Image coding apparatus, image decoding apparatus, image coding method, image decoding method, image coding program recording media, image decoding program recording media

摘要

An image coding apparatus for coding an input signal including an image signal of an array of pixels having pixel values and a significant signal showing whether the image signal is significant is characterized by a prediction image generating device for specifying, as a target area, and area of the input image signal to be the target of coding, on the basis of the input significant signal, and generating a prediction image for the target area, using locally reproduced image. In accordance with the invention, the influence of the pixel values of the insignificant pixels on the coding process is reduced, whereby the coding efficiency is improved.