CPC H04N 19/70 (2014.11) [G06T 9/00 (2013.01)] | 1 Claim |
[ 4. A method for transmitting a bitstream via a network, the method comprising:
transmitting the bitstream via the network,
wherein the bitstream comprises last position information indicating a horizontal position and a vertical position of a last non-zero coefficient in a predetermined order within a current block to be encoded, the current block being included in a picture and including a plurality of coefficients,
wherein the bitstream is generated by performing operations, including
binarizing a horizonal component of the last position information and a vertical component of the last position information into a first binary signal and a second binary signal, respectively, the vertical component indicating a vertical position of the last non-zero coefficient, and the horizontal component indicating a horizontal position of the last non-zero coefficient;
encoding a first partial signal and a second partial signal, respectively, into an encoded first partial signal and an encoded second partial signal, by first arithmetic coding, and encoding a third partial signal and a fourth partial signal, respectively, into an encoded third partial signal and an encoded fourth partial signal, by second arithmetic coding different from the first arithmetic coding, the first partial signal being a part of the first binary signal, the second partial signal being a part of the second binary signal, the third partial signal being another part of the first binary signal, and the fourth partial signal being another part of the second binary signal; and
arranging the encoded first partial signal, the encoded second partial signal, the encoded third partial signal, and the encoded fourth partial signal in the bit stream, in this order,
wherein when the current block to be encoded is a 4×4 block, the binarized last position information only has a prefix part, and not a suffix part, and
wherein when the current block to be encoded is greater in size than a 4×4 block, the binarized last position information for a first section of the current block corresponding to a 4×4 block only has a prefix part, and not a suffix part, whereas the binarized last position information for a second section of the current block that does not correspond to a 4×4 block has a prefix part and a suffix part, a length of the suffix part is not determined by the size of block and varies depending on the value of the binarized last position information.]
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