Method and apparatus for setting reference picture index of temporal merging candidate
The present invention relates to a method and apparatus for setting a reference picture index of a temporal merging candidate. An inter-picture prediction method using a temporal merging candidate can include the steps of: determining a reference picture index for a current block; and inducing a temporal merging candidate block of the current block and calculating a temporal merging candidate from the temporal merging candidate block, wherein the reference picture index of the temporal merging candidate can be calculated regardless of whether a block other than the current block is decoded. Accordingly, a video processing speed can be increased and video processing complexity can be reduced.
1. A method for decoding a video signal comprising:
determining whether a first sub-block and a second sub-block included in a current coding block share a single merging candidate list based on a size of the current coding block;
deriving a temporal merging candidate based on the size and a position of the current coding block, when the first sub-block and the second sub-block share the single merging candidate list; and
generating a merging candidate list for the first sub-block and the second sub-block based on the temporal merging candidate, and
wherein a reference picture index for the temporal merging candidate is set to a fixed value, and
wherein the temporal merging candidate is derived using a neighboring block which is located in a picture different from a picture including the current coding block and at a location collocated with the current coding block.
2. A method for encoding a video signal comprising:
determining whether a first sub-block and a second sub-block included in a current coding block share a single merging candidate list based on a size of the current coding block;
deriving a temporal merging candidate based on the size and a position of the current coding block, when the first sub-block and the second sub-block share the single merging candidate list; and
generating a merging candidate list for the first sub-block and the second sub-block based on the temporal merging candidate, and
wherein a reference picture index for the temporal merging candidate is set to a fixed value, and
wherein the temporal merging candidate is derived using a neighboring block which is located in a picture different from a picture including the current coding block and at a location collocated with the current coding block.
3. A non-transitory computer-readable recording medium storing a bitstream which is received and decoded by an image decoding apparatus, and used to reconstruct an image, wherein the bitstream comprises size information and position information of a current coding block,
wherein the size information of the current coding block, is used for determining whether a first sub-block and a second sub-block included in the current coding block share a single merging candidate list in a decoding process,
wherein when the first sub-block and the second sub-block share the single merging candidate list, a temporal merging candidate, the size and position information of the current coding block is used for deriving a temporal merging candidate in the decoding process,
wherein the temporal merging candidate is used for generating a merging candidate list for the first sub-block and the second sub-block, and
wherein a reference picture index for the temporal merging candidate is set to a fixed value, and
wherein the temporal merging candidate is derived using a neighboring block which is located in a picture different from a picture including the current coding block and at a location collocated with the current coding block.
4. The method of claim 1 , wherein whether the first sub-block and the second sub-block share the single merging candidate list, is determined based on a result of comparison between the size of the current coding block and a predefined size.
5. The method of claim 2 , wherein whether the first sub-block and the second sub-block share the single merging candidate list, is determined based on a result of comparison between the size of the current coding block and a predefined size.
6. The computer-readable recording medium method of claim 3 , wherein whether the first sub-block and the second sub-block share the single merging candidate list, is determined based on a result of comparison between the size of the current coding block and a predefined size.