Method and apparatus for encoding/decoding image signals using weight prediction parameter sets based on neighboring regions
View Patent ↗A method for decoding/encoding an image signal with the decoding/encoding apparatus according to the present invention may comprise the steps of: generating a first prediction sample of a current block, determining a weight prediction parameter set of the current block by using a predetermined reference region, the reference region being a region reconstructed before the current block and including a neighboring region spatially adjacent to the current block, and generating a second prediction sample of the current block by applying the weight prediction parameter set to the first prediction sample. Herein, the neighboring region is determined based on information signaled from a bitstream, and the information specifies a position of the neighboring region and is used to determine the weight prediction parameter set.
1. A method for decoding a video signal with a decoding apparatus, comprising:
generating, with the decoding apparatus, a first prediction sample of a current block;
determining, with the decoding apparatus, a weight prediction parameter set of the current block by using a predetermined reference region, the reference region being a region reconstructed before the current block and including a neighboring region spatially adjacent to the current block; and
generating, with the decoding apparatus, a second prediction sample of the current block by applying the weight prediction parameter set to the first prediction sample,
wherein the neighboring region is determined based on information signaled from a bitstream,
wherein the information specifies a position of the neighboring region and is used to determine the weight prediction parameter set, and
wherein the neighboring region includes a bottom-left neighboring region or a right-top neighboring region.
2. The method of claim 1 , wherein the weight prediction parameter set includes a plurality of weight prediction parameters, and
wherein the plurality of the weight prediction parameters include at least one of a multiplication parameter multiplied by the first prediction sample and an addition parameter added to the first prediction sample.
3. The method of claim 1 , wherein the weight prediction parameter set is determined based on at least one of a size and a shape of the current block.
4. The method of claim 2 , wherein the weight prediction parameter set further includes a weight prediction parameter generated by using two weight prediction parameters among the plurality of the weight prediction parameters.
5. A method for encoding a video signal with an encoding apparatus, comprising:
generating, with the encoding apparatus, a first prediction sample of a current block;
determining, with the encoding apparatus, a weight prediction parameter set of a current block by using a predetermined reference region, the reference region being a region encoded before the current block and including a neighboring region spatially adjacent to the current block; and
generating, with the encoding apparatus, a second prediction sample of the current block by applying the weight prediction parameter set to the first prediction sample,
wherein information used to determine the neighboring region is encoded into a bitstream,
wherein the information specifies a position of the neighboring region and is used to determine the weight prediction parameter set, and
wherein the neighboring region includes a bottom-left neighboring region or a right-top neighboring region.
6. The method of claim 5 , wherein the weight prediction parameter set includes a plurality of weight prediction parameters, and
wherein the plurality of the weight prediction parameters include at least one of a multiplication parameter multiplied by the first prediction sample and an addition parameter added to the first prediction sample.
7. The method of claim 5 , wherein the weight prediction parameter set is determined based on at least one of a size and a shape of the current block.
8. The method of claim 6 , wherein the weight prediction parameter set further includes a weight prediction parameter generated by using two weight prediction parameters among the plurality of the weight prediction parameters.
9. A non-transitory computer-readable medium for storing a bitstream generated by an encoding method, the method comprising:
generating a first prediction sample of a current block;
determining a weight prediction parameter set of a current block by using a predetermined reference region, the reference region being a region encoded before the current block and including a neighboring region spatially adjacent to the current block; and
generating a second prediction sample of the current block by applying the weight prediction parameter set to the first prediction sample,
wherein information used to determine the neighboring region is encoded into a bitstream,
wherein the information specifies a position of the neighboring region and is used to determine the weight prediction parameter set, and
wherein the neighboring region includes a bottom-left neighboring region or a right-top neighboring region.