| CPC G06Q 10/06312 (2013.01) [G06Q 10/0637 (2013.01); G06Q 10/0639 (2013.01); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/46 (2014.11)] | 4 Claims |
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1. An image decoding method comprising:
obtaining, from a bitstream, a first coded block flag indicating whether a current coding unit comprises one or more non-zero significant transform coefficients;
when the first coded block flag of the current coding unit indicates that the current coding unit comprises the one or more non-zero significant transform coefficients, identifying whether at least one of a height and a width of the current coding unit is greater than a predetermined size;
based on whether the at least one of the height and the width of the current coding unit is greater than the predetermined size, obtaining at least one transform unit included in the current coding unit;
when the at least one of the height and the width of the current coding unit is greater than the predetermined size, obtaining a second coded block flag from the bitstream, the second coded block flag indicating whether a block of a luma component included in the at least one transform unit comprises one or more non-zero significant transform coefficients;
obtaining a residual signal of the block of the luma component included in the at least one transform unit, based on the second coded block flag; and
reconstructing the current coding unit based on the residual signal.
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