Video colour component prediction method and apparatus, and computer storage medium

A method for storing a bitstream, applied to an encoder and comprising:

• executing the following operations to generate a bitstream, and storing the bitstream:
• acquiring a luma component neighboring reference value and a luma component reconstructed value corresponding to a current coding block, wherein the luma component neighboring reference value represents a luma component parameter corresponding to a neighboring reference sample of the current coding block, and the luma component reconstructed value represents one or more reconstructed parameters of a luma component corresponding to the current coding block;
• determining a weight coefficient corresponding to the neighboring reference sample, wherein the weight coefficient is determined according to position between the current block and the neighboring reference sample;
• determining a scaling factor according to the weight coefficient and the luma component neighboring reference value;
• and
• obtaining a chroma component predicted value corresponding to the current coding block based on a linear model corresponding to the scaling factor.

A method for transmitting a bitstream, comprising:

• executing the following operations to generate a bitstream, and transmitting the bitstream:
• acquiring a luma component neighboring reference value and a luma component reconstructed value corresponding to a current coding block, wherein the luma component neighboring reference value represents a luma component parameter corresponding to a neighboring reference sample of the current coding block, and the luma component reconstructed value represents one or more reconstructed parameters of a luma component corresponding to the current coding block;
• determining a weight coefficient corresponding to the neighboring reference sample, wherein the weight coefficient is determined according to position between the current block and the neighboring reference sample;
• determining a scaling factor according to the weight coefficient and the luma component neighboring reference value;
• and
• obtaining a chroma component predicted value corresponding to the current coding block based on a linear model corresponding to the scaling factor.