Interpretation method and apparatus therefor

Abstract

To provide a method and apparatus for video coding capable of decreasing the complexity and improving the encoding / decoding efficiency.SOLUTION: An inter prediction method according to the present invention comprises the steps of: generating a merge candidate list for a block to be predicted corresponding to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted, so as to generate a prediction block corresponding to the current prediction unit.SELECTED DRAWING: Figure 6

Claims

1. A video decoding method performed by a decoding device, The steps include receiving information about the parallel merge level, which indicates the size of the parallel merge unit region, and merge index information, A step to obtain merge flag information indicating whether the merge mode is applied to the current block, The steps include: deriving a spatial merge candidate for the current block based on the merge flag information indicating that the merge mode is applied to the current block; The steps include: constructing a merge candidate list that includes the spatial merge candidate for the current block; The steps include: deriving the movement information of the current block based on one of the spatial merge candidates indicated by the merge index information within the merge candidate list; The steps include: deriving a predicted sample of the current block based on the derived motion information; The steps include generating a restored picture based on the aforementioned predicted sample, The size of the parallel merge unit region is derived based on the information relating to the parallel merge level, The aforementioned current block belongs to the aforementioned parallel merge unit region, The aforementioned block relates to a PU (prediction unit), and the PU is one of the PUs separated from a CU (coding unit). The PU has a size smaller than the size of the parallel merge unit region and is located within the parallel merge unit region. The aforementioned spatial merge candidate is identical to the 2N × 2N PU spatial merge candidate having the same size as the parallel merge unit region. A method for deriving the spatial merge candidates of the 2N × 2N PU having the same size as the parallel merge unit region from the lower left corner surrounding block, the left side surrounding block, the upper right corner surrounding block, the upper side surrounding block, and the upper left corner surrounding block of the parallel merge unit region.

2. A video encoding method performed by an encoding device, A step of generating merge flag information based on whether the merge mode is applied to the current block, The steps include: deriving a spatial merge candidate for the current block based on the merge flag information indicating that the merge mode is applied to the current block; The steps include: constructing a merge candidate list that includes the spatial merge candidate for the current block; The steps include selecting a merge candidate from the aforementioned merge candidate list, The steps include generating merge index information to indicate the selected merge candidate from the merge candidate list, The steps include: deriving the parallel merge level, which indicates the size of the parallel merge unit region; The steps include generating information regarding the parallel merge level, The steps include encoding video information including the merge flag information, the merge index information, and the information relating to the parallel merge level, The size of the parallel merge unit region is indicated based on the information relating to the parallel merge level, The aforementioned current block belongs to the aforementioned parallel merge unit region, The aforementioned block relates to a PU (prediction unit), and the PU is one of the PUs separated from a CU (coding unit). The PU has a size smaller than the size of the parallel merge unit region and is located within the parallel merge unit region. The aforementioned spatial merge candidate is identical to the 2N × 2N PU spatial merge candidate having the same size as the parallel merge unit region. A method for deriving the spatial merge candidates of the 2N × 2N PU having the same size as the parallel merge unit region from the lower left corner surrounding block, the left side surrounding block, the upper right corner surrounding block, the upper side surrounding block, and the upper left corner surrounding block of the parallel merge unit region.

3. A method for transmitting video data, A step of generating a bitstream, wherein the bitstream is A step of generating merge flag information based on whether the merge mode is applied to the current block, The steps include: deriving a spatial merge candidate for the current block based on the merge flag information indicating that the merge mode is applied to the current block; The steps include: constructing a merge candidate list that includes the spatial merge candidate for the current block; The steps include selecting a merge candidate from the aforementioned merge candidate list, The steps include generating merge index information to indicate the selected merge candidate from the merge candidate list, The steps include: deriving the parallel merge level, which indicates the size of the parallel merge unit region; The steps include generating information regarding the parallel merge level, A step of encoding video information including the merge flag information, the merge index information, and the information relating to the parallel merge level, which is generated based on the step of The step of transmitting the data, which includes the bitstream, The size of the parallel merge unit region is indicated based on the information relating to the parallel merge level, The aforementioned current block belongs to the aforementioned parallel merge unit region, The aforementioned block relates to a PU (prediction unit), and the PU is one of the PUs separated from a CU (coding unit). The PU has a size smaller than the size of the parallel merge unit region and is located within the parallel merge unit region. The aforementioned spatial merge candidate is identical to the 2N × 2N PU spatial merge candidate having the same size as the parallel merge unit region. A method for deriving the spatial merge candidates of the 2N × 2N PU having the same size as the parallel merge unit region from the lower left corner surrounding block, the left side surrounding block, the upper right corner surrounding block, the upper side surrounding block, and the upper left corner surrounding block of the parallel merge unit region.

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