Picture prediction method and apparatus
A picture prediction method includes receiving a bitstream; parsing the bitstream to obtain a prediction mode of a current block; when the prediction mode of the current block is a combined intra and inter prediction mode, selecting an execution manner of a triangular prediction unit mode according to a preset policy; determining motion information of the current block according to the execution manner of the triangular prediction unit mode; performing a motion compensation process based on the motion information, to obtain an inter prediction sample; obtaining an intra prediction sample according to the prediction mode of the current block; and combining the inter prediction sample and the intra prediction sample to obtain a prediction picture of the current block.
1. A method, comprising:
encoding an identifier into a bitstream, wherein the identifier indicates whether a combined intra and inter prediction mode is applied for a current block, wherein an intra prediction mode in the combined intra and inter prediction mode is a planar mode; and
determining, when the identifier indicates that the combined intra and inter prediction mode is applied for the current block, that a geometric partitioning based prediction mode is not used to obtain prediction samples of the current block, wherein the geometric partitioning based prediction mode comprises a triangular prediction unit mode.
2. The method of claim 1 , further comprising:
obtaining inter prediction samples of the current block according to an inter prediction mode;
obtaining intra prediction samples of the current block according to the intra prediction mode; and
combining the inter prediction samples and the intra prediction samples to obtain combined prediction samples of the current block.
3. The method of claim 1 , further comprising encoding a merge index into the bitstream, wherein the merge index is for determining motion information of the current block, and wherein the motion information is for obtaining inter prediction samples of the current block.
4. The method of claim 1 , further comprising determining, when a constraint condition is met, that the geometric partitioning based prediction mode is used to obtain the prediction samples of the current block, wherein the constraint condition comprises the identifier, and wherein the identifier indicates the combined intra and inter prediction mode is not applied for the current block.
5. The method of claim 4 , further comprising:
determining motion information of the current block according to the geometric partitioning based prediction mode; and
performing a motion compensation process based on the motion information to obtain the prediction samples of the current block.
6. The method of claim 4 , further comprising encoding a geometric partitioning index into the bitstream, wherein a splitting direction of the geometric partitioning based prediction mode is based on the geometric partitioning index.
7. An apparatus comprising:
a memory configured to store instructions; and
a processor coupled to the memory, wherein the instructions cause the processor to be configured to:
encode an identifier into a bitstream, wherein the identifier indicating whether a combined intra and inter prediction mode is applied for a current block, wherein an intra prediction mode in the combined intra and inter prediction mode is a planar mode; and
determine, when the identifier indicates that the combined intra and inter prediction mode is applied for the current block, that a geometric partitioning based motion compensation is not used to obtain prediction samples of the current block, wherein the geometric partitioning based prediction mode comprises a triangular prediction unit mode.
8. The apparatus of claim 7 , wherein the instructions further cause the processor to be configured to:
obtain inter prediction samples of the current block according to an inter prediction mode;
obtain intra prediction samples of the current block according to the intra prediction mode; and
combine the inter prediction samples and the intra prediction samples to obtain combined prediction samples of the current block.
9. The apparatus of claim 7 , wherein the instructions further cause the processor to be configured to encode a merge index into the bitstream, wherein the merge index is used to determine motion information of the current block, and wherein the motion information is used to obtain inter prediction samples of the current block.
10. The apparatus of claim 7 , wherein the instructions further cause the processor to be configured to determine, when a constraint condition is met, that the geometric partitioning based prediction mode is used to obtain the prediction samples of the current block, wherein the constraint condition comprises the identifier indicating that the combined intra and inter prediction mode is not applied for the current block.
11. The apparatus of claim 10 , wherein the instructions further cause the processor to be configured to:
determine motion information of the current block according to the geometric partitioning based prediction mode; and
perform a motion compensation process based on the motion information to obtain the prediction samples of the current block.
12. The apparatus of claim 10 , wherein the instructions further cause the processor to be configured to encode a geometric partitioning index into the bitstream, wherein a splitting direction of the geometric partitioning based prediction mode is based on the geometric partitioning index.
13. A non-transitory computer-readable storage medium storing program code comprising instructions, which when executed using a processor of an apparatus, cause the apparatus to:
encode an identifier into a bitstream, wherein the identifier indicating whether a combined intra and inter prediction mode is applied for a current block, wherein an intra prediction mode in the combined intra and inter prediction mode is a planar mode; and
determine, when the identifier indicates that the combined intra and inter prediction mode is applied for the current block, that a geometric partitioning based motion compensation is not used to obtain prediction samples of the current block, wherein the geometric partitioning based prediction mode comprises a triangular prediction unit mode.
14. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions, when executed using the processor, further cause the apparatus to:
obtain inter prediction samples of the current block according to an inter prediction mode;
obtain intra prediction samples of the current block according to the intra prediction mode; and
combine the inter prediction samples and the intra prediction samples to obtain combined prediction samples of the current block.
15. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions, when executed using the processor, further cause the apparatus to encode a merge index into the bitstream, wherein the merge index is used to determine motion information of the current block, and wherein the motion information is used to obtain inter prediction samples of the current block.
16. The non-transitory computer-readable storage medium of claim 13 ,
wherein the instructions, when executed using the processor, further cause the apparatus to determine, when a constraint condition is met, that the geometric partitioning based motion compensation is used to obtain the prediction samples of the current block, wherein the constraint condition comprises the identifier indicating that the combined intra and inter prediction mode is not applied for the current block.
17. The non-transitory computer-readable storage medium of claim 16 , wherein the instructions, when executed using the processor, further cause the apparatus to:
determine motion information of the current block according to the geometric partitioning based motion compensation; and
perform a motion compensation process based on the motion information to obtain the prediction samples of the current block.
18. The non-transitory computer-readable storage medium of claim 16 , wherein the instructions, when executed using the processor, further cause the apparatus to encode a geometric partitioning index into the bitstream, and wherein a splitting direction of the geometric partitioning based prediction mode is based on the geometric partitioning index.
19. A non-transitory computer-readable medium storing a bitstream that is generated by an encoding method performed by a video encoding apparatus, wherein the bitstream comprises an identifier indicating whether a combined intra and inter prediction mode is applied for a current block, wherein an intra prediction mode in the combined intra and inter prediction mode is a planar mode, wherein when the identifier indicates that the combined intra and inter prediction mode is applied for the current block, a geometric partitioning based motion compensation is not used to obtain prediction samples of the current block, wherein the geometric partitioning based prediction mode comprises a triangular prediction unit mode, wherein when a constraint condition is met, the geometric partitioning based motion compensation is used to obtain the prediction samples of the current block, and wherein the constraint condition comprises the identifier indicating that the combined intra and inter prediction mode is not applied for the current block.
20. The non-transitory computer-readable medium of claim 19 , wherein a merge index is encoded into the bitstream, and wherein the merge index is for determining motion information of the current block.
21. The non-transitory computer-readable medium of claim 20 , wherein the motion information is for obtaining inter prediction samples of the current block.