IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, AND IMAGE ENCODING AND DECODING DEVICE

摘要

An image encoding method comprising: a binarization step (S401) for generating a first binarized signal and a second binarized signal, respectively, by binarizing a first component and a second component included in the LAST position information; arithmetic encoding steps for encoding a first partial signal, which is a part of the first binarized signal, and a second partial signal, which is a part of the second binarized signal, by means of first arithmetic encoding (S402, S405) and for encoding a third partial signal, which is a different part of the first binarized signal, and a fourth partial signal, which is a different part of the second binarized signal, by means of second arithmetic encoding (S409, S411); and a sequencing step (S412) for sequencing the encoded first through fourth partial signals within the bit stream. In the sequencing step (S412), either (i) the encoded second partial signal is arranged so as to be succedent to the encoded first partial signal, or (ii) the encoded fourth partial signal is arranged so as to be succedent to the encoded third partial signal.