Interaction between IBC and ATMVP
Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.
1. A method of coding video data, comprising:
determining, during a conversion between a current video block of a video and a bitstream representation of the video, that the current video block is coded with a subblock-based temporal motion vector prediction (SbTMVP) mode;
determining whether a spatial neighboring block of the current video block is coded with an intra-block copy (IBC) mode;
determining that motion information of the spatial neighboring block is unavailable in response to the spatial neighboring block is coded with the IBC mode; and
identifying at least one corresponding video region in a collocated picture of the current video block without using the motion information of the spatial neighboring block.
2. The method of claim 1 , further comprising:
determining whether the corresponding video region is coded with the IBC mode;
determining that motion information of the corresponding video region is unavailable in response to the corresponding video region is coded with the IBC mode; and
performing the conversion between the current video block and the bitstream representation.
3. The method of claim 2 , wherein for the IBC mode, a prediction is derived from sample values of a same slice as determined by block vectors.
4. The method of claim 1 , further comprising:
determining that an indicator designating the spatial neighboring block as unavailable or intra-coded is presented in the bitstream representation in response to the spatial neighboring block being coded with the IBC mode.
5. The method of claim 1 , further comprising:
determining that an indicator designating the corresponding video region as unavailable or intra-coded is presented in the bitstream representation in response to the corresponding video region being coded with the IBC mode.
6. The method of claim 1 , further comprising:
decoding an indicator designating the spatial neighboring block as using intra coding technique in the SbTMVP mode.
7. The method of claim 1 , further comprising:
decoding an indicator designating the corresponding video region as using intra coding technique in the SbTMVP mode.
8. The method of claim 1 , wherein the conversion includes encoding the current video block into the bitstream representation.
9. The method of claim 1 , wherein the conversion includes decoding the current video block from the bitstream representation.
10. An apparatus for coding video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
determining, during a conversion between a current video block of a video and a bitstream representation of the video, that the current video block is coded with a subblock-based temporal motion vector prediction (SbTMVP) mode;
determining whether a spatial neighboring block of the current video block is coded with an intra-block copy (IBC) mode;
determining that motion information of the spatial neighboring block is unavailable in response to the spatial neighboring block is coded with the IBC mode; and
identifying at least one corresponding video region in a collocated picture of the current video block without using the motion information of the spatial neighboring block.
11. The apparatus of claim 10 , further comprising:
determining whether the corresponding video region is coded with the IBC mode;
determining that motion information of the corresponding video region is unavailable in response to the corresponding video region is coded with the IBC mode; and
performing the conversion between the current video block and the bitstream representation.
12. The apparatus of claim 11 , wherein for the IBC mode, a prediction is derived from sample values of a same slice as determined by block vectors.
13. The apparatus of claim 10 , further comprising:
determining that an indicator designating the spatial neighboring block as unavailable or intra-coded is presented in the bitstream representation in response to the spatial neighboring block being coded with the IBC mode.
14. The apparatus of claim 10 , further comprising:
determining that an indicator designating the corresponding video region as unavailable or intra-coded is presented in the bitstream representation in response to the corresponding video region being coded with the IBC mode.
15. The apparatus of claim 10 , further comprising:
decoding an indicator designating the spatial neighboring block as using intra coding technique in the SbTMVP mode.
16. The apparatus of claim 10 , further comprising:
decoding an indicator designating the corresponding video region as using intra coding technique in the SbTMVP mode.
17. The apparatus of claim 10 , wherein the conversion includes encoding the current video block into the bitstream representation.
18. The apparatus of claim 10 , wherein the conversion includes decoding the current video block from the bitstream representation.
19. A non-transitory computer-readable storage medium storing instructions that cause a processor to:
determining, during a conversion between a current video block of a video and a bitstream representation of the video, that the current video block is coded with a subblock-based temporal motion vector prediction (SbTMVP) mode;
determining whether a spatial neighboring block of the current video block is coded with an intra-block copy (IBC) mode;
determining that motion information of the spatial neighboring block is unavailable in response to the spatial neighboring block is coded with the IBC mode; and
identifying at least one corresponding video region in a collocated picture of the current video block without using the motion information of the spatial neighboring block.
20. A non-transitory computer-readable recording medium storing a bitstream representation which is generated by a method performed by a video processing apparatus, wherein the method comprises:
determining, during a conversion between a current video block of a video and a bitstream representation of the video, that the current video block is coded with a subblock-based temporal motion vector prediction (SbTMVP) mode;
determining whether a spatial neighboring block of the current video block is coded with an intra-block copy (IBC) coding mode;
determining that motion information of the spatial neighboring block is unavailable in response to the spatial neighboring block is coded with the IBC mode; and
identifying at least one corresponding video region in a collocated picture of the current video block without using the motion information of the spatial neighboring block;
generating the bitstream representation from the current video block.