Image prediction on the basis of a frequency band analysis of the to be predicted image

摘要

To effectively compress a moving image in which images having different signal bands exist, when encoding/decoding the moving image. A moving image encoding device 13 measures a band of a target image to be encoded and a band of a reference image by means of a band analyzer 10, and generates band-related information representing these bands. A prediction signal generator 9 generates a prediction signal such that the signal matches the band of the target image, from the reference image, on the basis of the band-related information. A difference unit 2 obtains a difference between the target image and the prediction signal to generate a differential signal. A converter 3 and a quantizer 4 each encode the differential signal to generate an encoded differential signal. An inverse quantizer 5 and an inverter 6 each decode the encoded differential signal to generate a decoded differential signal. An adder 7 adds the prediction signal to the decoded differential signal to generate a reproduced image. An output terminal 12 outputs at least the encoded differential signal and the band-related information.