CPC H04N 19/577 (2014.11) [H04N 19/423 (2014.11); H04N 19/44 (2014.11); H04N 19/46 (2014.11); H04N 19/503 (2014.11); H04N 19/573 (2014.11); H04N 19/70 (2014.11)] | 7 Claims |
1. A video decoding method performed by a decoding apparatus, the method comprising:
obtaining picture order count (POC) information for constructing a reference picture set including reference pictures through a slice header;
deriving picture order count (POC) values for specifying the reference pictures based on the POC information, and
constructing the reference picture set based on the derived POC values;
generating a reference picture list based on the reference picture set;
performing an inter prediction on a current block based on the reference picture list,
wherein a POC value of an i-th reference picture is derived based on a POC difference derived from the POC information,
wherein the POC information in the slice header include POC difference value information,
wherein the POC difference value information specifies the POC difference between a current picture and the i-th reference picture when the i is equal to 0,
wherein the POC difference value information specifies the POC difference between the i-th reference picture and an (i−1)-th reference picture when the i is greater than 0,
wherein in the reference picture list, the reference pictures previous to the current picture in the picture order count (POC) order are positioned priorly than the reference pictures subsequent to the current picture in the picture order count (POC) order, and
wherein in the reference picture list, indices for the reference pictures previous to the current picture are allocated based on the descending order of picture order count (POC) values of the reference pictures previous to the current picture, and indices for the reference pictures subsequent to the current picture are allocated based on the ascending order of picture order count (POC) values of the reference pictures subsequent to the current picture.
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