Image coding method, image decoding method, image coding apparatus, image decoding apparatus, and image coding and decoding apparatus

    公开(公告)号:AU2013272989B2

    公开(公告)日:2017-05-25

    申请号:AU2013272989

    申请日:2013-05-31

    Abstract: An image encoding method according to the present invention includes a context arithmetic coding step (S511) that, by means of context arithmetic coding that is arithmetic coding that uses a variable probability, successively encodes (i) first information that indicates whether to perform sample adaptive offset (SAO) processing, which is offset processing for a pixel value, with respect to a first area of an image, and (ii) second information that indicates, for SAO processing with respect to the first area, whether to use information from SAO processing with respect to an area different from the first area, and a bypass arithmetic coding step (S512) that, after the first information and second information have been encoded and by means of bypass arithmetic coding that is arithmetic coding that uses a constant probability, encodes other information that is information for SAO processing with respect to the first area and is different from both the second information and the first information.

    IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS

    公开(公告)号:AU2017202023A1

    公开(公告)日:2017-04-20

    申请号:AU2017202023

    申请日:2017-03-27

    Abstract: 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 encoding method, image decoding method, image encoding device, image decoding device, and image encoding/decoding device

    公开(公告)号:AU2012333927A1

    公开(公告)日:2013-08-22

    申请号:AU2012333927

    申请日:2012-11-05

    Abstract: 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.

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