A method of encoding video information, comprising: performing inter-prediction on a current block (300; 910; 1000) in a current picture; performing entropy coding on information on the inter-prediction including indicator information; and outputting the entropy-coded information, wherein in the performing of the inter-prediction, merge mode is applied to the current block (300; 910; 1000), the merge mode is an inter-prediction mode based on motion information of a merge candidate as current motion information of the current block (300; 910; 1000), wherein performing the inter-prediction includes: determining that the merge mode is applied to the current block (300; 910; 1000); configuring merge candidates including spatial merge candidates and a temporal merge candidate, wherein the spatial merge candidates are derived from spatial neighboring blocks of the current block (300; 910; 1000) and the temporal merge candidate is derived from a collocated block in a collocated picture; selecting a merge candidate from the configured merge candidates; generating the indicator information indicating the selected merge candidate; deriving motion information specified by the selected merge candidate as the current motion information of the current block (300; 910; 1000), wherein the current motion information includes a motion vector (600, 610, 620, 630) and a reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC); and deriving predicted pixels of the current block (300; 910; 1000) based on the motion vector (600, 610, 620, 630) and a reference picture indicated by the reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC) from a reference picture list for the current block (300; 910; 1000), wherein a reference index of the temporal merge candidate is set equal 0, and wherein the spatial neighboring blocks of the current block (300; 910; 1000) are a left bottom block, a right top block, a left-bottom corner block, a right-top corner block, and a left-top corner block of the current block (300; 910; 1000). performing inter-prediction on a current block (300; 910; 1000) in a current picture; performing entropy coding on information on the inter-prediction including indicator information; and outputting the entropy-coded information, wherein in the performing of the inter-prediction, merge mode is applied to the current block (300; 910; 1000), the merge mode is an inter-prediction mode based on motion information of a merge candidate as current motion information of the current block (300; 910; 1000), wherein performing the inter-prediction includes: determining that the merge mode is applied to the current block (300; 910; 1000); configuring merge candidates including spatial merge candidates and a temporal merge candidate, wherein the spatial merge candidates are derived from spatial neighboring blocks of the current block (300; 910; 1000) and the temporal merge candidate is derived from a collocated block in a collocated picture; selecting a merge candidate from the configured merge candidates; generating the indicator information indicating the selected merge candidate; deriving motion information specified by the selected merge candidate as the current motion information of the current block (300; 910; 1000), wherein the current motion information includes a motion vector (600, 610, 620, 630) and a reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC); and deriving predicted pixels of the current block (300; 910; 1000) based on the motion vector (600, 610, 620, 630) and a reference picture indicated by the reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC) from a reference picture list for the current block (300; 910; 1000), wherein a reference index of the temporal merge candidate is set equal 0, and wherein the spatial neighboring blocks of the current block (300; 910; 1000) are a left bottom block, a right top block, a left-bottom corner block, a right-top corner block, and a left-top corner block of the current block (300; 910; 1000). determining that the merge mode is applied to the current block (300; 910; 1000); configuring merge candidates including spatial merge candidates and a temporal merge candidate, wherein the spatial merge candidates are derived from spatial neighboring blocks of the current block (300; 910; 1000) and the temporal merge candidate is derived from a collocated block in a collocated picture; selecting a merge candidate from the configured merge candidates; generating the indicator information indicating the selected merge candidate; deriving motion information specified by the selected merge candidate as the current motion information of the current block (300; 910; 1000), wherein the current motion information includes a motion vector (600, 610, 620, 630) and a reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC); and deriving predicted pixels of the current block (300; 910; 1000) based on the motion vector (600, 610, 620, 630) and a reference picture indicated by the reference index (refldxLX, refldxLXA, refldxLXB, refldxLXC) from a reference picture list for the current block (300; 910; 1000), wherein a reference index of the temporal merge candidate is set equal 0, and wherein the spatial neighboring blocks of the current block (300; 910; 1000) are a left bottom block, a right top block, a left-bottom corner block, a right-top corner block, and a left-top corner block of the current block (300; 910; 1000).