Method, device, and medium for video processing

A method of processing video data, comprising:

• determining at least one syntax element of a video, the at least one syntax element indicating at least one of the following:
• a first flag indicating whether an encoder and decoder derive an intra prediction mode based on neighbouring samples of a current video unit of the video, or
• at least one parameter to be used for deriving the intra prediction mode based on the neighbouring samples of the current video unit;
• and
• performing a conversion between the video and a bitstream with the at least one syntax element.

An electronic device 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:
• determining at least one syntax element of a video, the at least one syntax element indicating at least one of the following:
• a first flag indicating whether an encoder and decoder derive an intra prediction mode based on neighbouring samples of a current video unit of the video, or
• at least one parameter to be used for deriving the intra prediction mode based on the neighbouring samples of the current video unit;
• and
• performing a conversion between the video and a bitstream with the at least one syntax element.

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

• determining at least one syntax element of a video, the at least one syntax element indicating at least one of the following:
• a first flag indicating whether an encoder and decoder derive an intra prediction mode based on neighbouring samples of a current video unit of the video, or
• at least one parameter to be used for deriving the intra prediction mode based on the neighbouring samples of the current video unit;
• and
• performing a conversion between the video and a bitstream with the at least one syntax element.