Method for encoding and decoding video, and apparatus using same
The present invention relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present invention comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected candidate.
1. A method of decoding video information, by a decoding apparatus, the method comprising:
receiving prediction related information and residual information for a current block;
determining a merge mode is applied for the current block based on the prediction related information;
deriving merge candidates for the merge mode from neighboring blocks of the current block;
deriving motion information of the current block based on the merge candidates;
deriving a prediction sample of the current block based on the derived motion information;
deriving a residual sample of the current block based on the residual information;
generating a reconstructed picture based on the prediction sample and the residual sample,
wherein the neighboring blocks for the merge candidates include a first neighboring block located in a left side of the current block, a second neighboring block located in an upper side of the current block, and corner neighboring blocks of the current block.
2. The method of claim 1 , wherein the neighboring blocks for the merge candidates are located in the in same regions in which candidate blocks for a motion vector prediction (MVP) mode are located.
3. The method of claim 1 , wherein the corner neighboring blocks include a lower left corner neighboring block, an upper right corner neighboring block, and an upper left corner neighboring block.
4. The method of claim 3 , wherein the first neighboring block is a bottommost block among left neighboring blocks adjacent to a left boundary of the current block, a second neighboring block is a rightmost block among upper neighboring blocks adjacent to an upper boundary of the current block.
5. The method of claim 4 , wherein the first neighboring block is adjacent to the lower left corner neighboring block, and the second neighboring block is adjacent to the upper right corner neighboring block.
6. The method of claim 4 , wherein availabilities of the first neighboring block and the second neighboring block are determined, and then availabilities of the lower left corner neighboring block, the upper right corner neighboring block, and the upper left corner neighboring block are determined.
7. A method of encoding video information, by an encoding apparatus, the method comprising:
determining a merge mode that is applied for a current block;
generating prediction related information for the current block;
deriving merge candidates for the merge mode from neighboring blocks of the current block;
deriving motion information of the current block based on the merge candidates;
deriving a prediction sample of the current block based on the derived motion information;
deriving a residual sample of the current block based on the prediction sample;
generating residual information for the residual sample; and
encoding video information including the prediction related information and the residual information,
wherein the neighboring blocks for the merge candidates include a first neighboring block located in a left side of the current block, a second neighboring block located in an upper side of the current block, and corner neighboring blocks of the current block.
8. The method of claim 7 , wherein the neighboring blocks for the merge candidates are located in same regions in which candidate blocks for a motion vector prediction (MVP) mode are located.
9. The method of claim 7 , wherein the corner neighboring blocks include a lower left corner neighboring block, an upper right corner neighboring block, and an upper left corner neighboring block.
10. The method of claim 9 , wherein the first neighboring block is a bottommost block among left neighboring blocks adjacent to a left boundary of the current block, a second neighboring block is a rightmost block among upper neighboring blocks adjacent to an upper boundary of the current block.
11. The method of claim 10 , wherein the first neighboring block is adjacent to the lower left corner neighboring block, and the second neighboring block is adjacent to the upper right corner neighboring block.
12. The apparatus of claim 10 , wherein availabilities of the first neighboring block and the second neighboring block are determined, and then availabilities of the lower left corner neighboring block, the upper right corner neighboring block, and the upper left corner neighboring block are determined.
13. A non-transitory decoder-readable storage medium storing a bitstream generated by a method, the method comprising:
determining a merge mode that is applied for a current block;
generating prediction related information for the current block;
deriving merge candidates for the merge mode from neighboring blocks of the current block;
deriving motion information of the current block based on the merge candidates;
deriving a prediction sample of the current block based on the derived motion information;
deriving a residual sample of the current block based on the prediction sample;
generating residual information for the residual sample; and
generating the bitstream including video information including the prediction related information and the residual information,
wherein the neighboring blocks for the merge candidates include a first neighboring block located in a left side of the current block, a second neighboring block located in an upper side of the current block, and corner neighboring blocks of the current block.
14. The non-transitory decoder-readable storage medium of claim 13 , wherein the neighboring blocks for the merge candidates are located in same regions in which candidate blocks for a motion vector prediction (MVP) mode are located.
15. The non-transitory decoder-readable storage medium of claim 13 , wherein the corner neighboring blocks include a lower left corner neighboring block, an upper right corner neighboring block, and an upper left corner neighboring block.
16. The non-transitory decoder-readable storage medium of claim 13 , wherein the first neighboring block is a bottommost block among left neighboring blocks adjacent to a left boundary of the current block, the second neighboring block is a rightmost block among upper neighboring blocks adjacent to an upper boundary of the current block.