Methods for intra prediction, and encoder

A method for intra prediction, implemented by a decoder, the method comprising:

• determining occupancy information of a first number of neighboring nodes of a coded node;
• determining occupancy information of a second number of neighboring nodes of the coded node based on a position association between at least one neighboring node of the coded node and a child node of the coded node, wherein the first number is greater than the second number;
• determining an occupancy number corresponding to the second number of neighboring nodes based on the occupancy information of the second number of neighboring nodes;
• and
• determining the occupancy prediction result of the child node of the coded node based on the occupancy number.

A decoder, comprising:

• a processor;
• and
• a memory storing instructions executable by the processor,
• wherein the processor is configured to execute the instructions to perform operations comprising:
• determining occupancy information of a first number of neighboring nodes of a coded node;
• determining occupancy information of a second number of neighboring nodes of the coded node based on a position association between at least one neighboring node of the coded node and a child node of the coded node, wherein the first number is greater than the second number;
• determining an occupancy number corresponding to the second number of neighboring nodes based on the occupancy information of the second number of neighboring nodes;
• and
• determining the occupancy prediction result of the child node of the coded node based on the occupancy number.