ABSRTACT: An image coding method for coding last position information indicating a horizontal position and a vertical position of a last non-zero coefficient in a predetermined order in a current block to be coded. The method comprises: binarizing first and second components to generate first and second binary signals, respectively, the first component being one of a horizontal component and a vertical component which are included in the last position information, and the second component being the other of the horizontal component and the vertical component; coding first and second partial signals by first arithmetic coding, and coding third and fourth partial signals by second arithmetic coding different from the first arithmetic coding, the first and third partials signals being parts of the first binary signal, the second and fourth partial signals being parts of the second binary signal, wherein the first arithmetic coding is context adaptive arithmetic coding using a variable probability that is updated based on a coded signal, and the second arithmetic coding is bypass coding using a fixed probability; and arranging the coded first, second, third and fourth partial signals in a bit stream in this order. When the horizontal component is a maximum value for a size of the current block, the bits of the first partial signal are identical and when the vertical component is a maximum value for a size of the current block, the bits of the second partial signal are identical. - 99 8879495_1 (GHMatters) P94474.AU.1 (Start Binarize last position information S402 Code prefix part of X component S403 -N Suffix part included? No S404 Yes Set suffix flag of X component 'ON' Code prefix part of Y component Suffix part included? No S407 Yes Set suffix flag of Y component 'ON' Suffix flag of X component is 'ON'? No S409 Yes Code suffix part of X component Suffix flag of Y component is 'ON'? N S411 Yes Code suffix part of Y component Place last position information in bit stream (nd
IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS