Patent ID: 8340175

Claim:
A moving image decoding method, comprising: inputting compressed data that contains an encoded differential signal obtained by predictively encoding a moving image and frequency characteristic-related information; decoding the encoded differential signal to generate a decoded differential signal; generating a prediction signal for the decoded differential signal; adding the prediction signal to the decoded differential signal to generate a reproduced image; and storing in a storage unit a reference image that is used for generating the prediction signal, wherein the frequency characteristic-related information represents information indicating a correlation between a frequency characteristic of the reproduced image and a frequency characteristic of the reference image, and in the prediction signal generating the prediction signal is generated such that the signal matches a frequency characteristic of a target image to be decoded, from the reference image, on the basis of the frequency characteristic-related information; and storing frequency characteristic information that is measured when decoding the reference image, wherein the prediction signal generating generates the prediction signal on the basis of the stored frequency characteristic information and the frequency characteristic of the reproduced image.