Interaction between intra block copy mode and inter prediction tools

An apparatus for processing 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:

• determine that an intra block copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, reference samples from a video region including the current video block are used;
• make a decision regarding a disabling of a combined inter-intra prediction mode for the current video block, wherein in the combined inter-intra prediction mode, a final prediction is generated at least based on a weighted sum of an intermediate intra prediction signal and an intermediate inter prediction signal;
• and
• perform, based on the decision, a conversion between the current video block and a bitstream of the video,
• wherein a combined inter-intra prediction flag for the current video block is not included in the bitstream in response to the IBC mode being used in the current video block.

A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:

• determining that an intra block copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, reference samples from a video region including the current video block are used;
• making a decision regarding a disabling of a combined inter-intra prediction mode for the current video block, wherein in the combined inter-intra prediction mode, a final prediction is generated at least based on a weighted sum of an intermediate intra prediction signal and an intermediate inter prediction signal;
• and
• generating the bitstream from the current video block based on the decision,
• wherein a combined inter-intra prediction flag for the current video block is not included in the bitstream in response to the IBC mode being used in the current video block.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• determine that an intra block copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, reference samples from a video region including the current video block are used;
• make a decision regarding a disabling of a combined inter-intra prediction mode for the current video block, wherein in the combined inter-intra prediction mode, a final prediction is generated at least based on a weighted sum of an intermediate intra prediction signal and an intermediate inter prediction signal;
• and
• perform, based on the decision, a conversion between the current video block and a bitstream of the video,
• wherein a combined inter-intra prediction flag for the current video block is not included in the bitstream in response to the IBC mode being used in the current video block.