IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE

摘要

In the present invention, an image encoding device is provided with a quantization step-size encoding unit (11) for encoding a quantization step size that controls quantization fineness, and a quantization step-size downsampling unit (12) that performs downsampling on one or a plurality of encoded quantization step sizes to generate a quantization step-size representative value. The quantization step-size encoding unit (11) is configured so that the quantization step-size representative value is used to predict a quantization step size.