Patent ID: 9743109
Date: 2017-08-22
CPC Classifications: H04N

Claim:
1. A decoding method comprising: splitting a picture into a plurality of maximum coding units; hierarchically splitting a maximum coding unit from among the plurality of maximum coding units into at least one coding unit based on split information; determining a position of a current prediction unit in a current coding unit among the at least one coding unit based on partition type information; determining a lower-left position outside of the current prediction unit by using the partition type information and the position of the current prediction unit, wherein the lower-left position outside of the current prediction unit is determined by using the position of the current prediction unit and a height of the current prediction unit according to the partition type information; determining a scan index of a minimum unit corresponding to the lower-left position; when the scan index of the minimum unit corresponding to the lower-left position is less than a scan index of a minimum unit included in the current prediction unit, determining that a neighboring unit corresponding to the lower-left position is available to use for the current prediction unit, wherein the scan index follows a raster scan order between the plurality of maximum coding units, wherein the scan index follows an upper-left, upper-right, lower-left, and lower-right order between coding units including in the maximum coding unit and between minimum units in a coding unit including in the coding units, wherein the split information indicates whether a coding unit of a first depth is split into coding units of a second depth lower than the first depth, wherein the current coding unit is a coding unit which is not split according to the split information, wherein the current prediction unit is determined by splitting the current coding unit by using the partition type information, wherein the minimum unit corresponding to the lower-left position is located below and to the left of the current prediction unit in the picture where the current prediction unit is located, and wherein the partition type information indicates a partition type of asymmetrically splitting the current coding unit along a height or a width of the current coding unit.