Method, device, and medium for video processing

A method of processing video data, comprising:

• constructing a candidate list for a current block of a video;
• and
• performing a conversion between the current block and a bitstream of the video based on the candidate list,
• wherein the candidate list is constructed based on a plurality of intra prediction modes, the number of the plurality of intra prediction modes is smaller than a preset value, and an intra prediction mode of the current block being derived based on neighbouring samples of the current block, or
• wherein the candidate list is constructed based on information of a neighbouring block and comprises at least one intra prediction mode for the current block, and the neighbouring block is not coded with an intra mode.

An apparatus for processing video data, comprising:

• a processing unit;
• and
• a memory coupled to the processing unit and having instructions stored thereon which, when executed by the processing unit, cause the electronic device to perform a method comprising:
• constructing a candidate list for a current block of a video;
• and
• performing a conversion between the current block and a bitstream of the video based on the candidate list,
• wherein the candidate list is constructed based on a plurality of intra prediction modes, the number of the plurality of intra prediction modes is smaller than a preset value, and an intra prediction mode of the current block being derived based on neighbouring samples of the current block, or
• wherein the candidate list is constructed based on information of a neighbouring block and comprises at least one intra prediction mode for the current block, and the neighbouring block is not coded with an intra mode.

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

• constructing a candidate list for a current block of a video;
• and
• performing a conversion between the current block and a bitstream of the video based on the candidate list,
• wherein the candidate list is constructed based on a plurality of intra prediction modes, the number of the plurality of intra prediction modes is smaller than a preset value, and an intra prediction mode of the current block being derived based on neighbouring samples of the current block, or
• wherein the candidate list is constructed based on information of a neighbouring block and comprises at least one intra prediction mode for the current block, and the neighbouring block is not coded with an intra mode.