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:
• determining a luma component neighboring reference value and a luma component reconstructed value corresponding to a current block, wherein the luma component neighboring reference value is indicative of a luma component parameter corresponding to a neighboring reference sample of the current block, and wherein the luma component reconstructed value is indicative of one or more reconstructed parameters of a luma component corresponding to the current block;
• and
• determining a chroma component predicted value corresponding to the current block at least based on a weight coefficient corresponding to the neighboring reference sample related to a position of the current block and the neighboring reference sample;
• and
• encoding a video at least based on the chroma component predicted value, wherein a scaling factor is determined by inputting the weight coefficient, the luma component neighboring reference value and the chroma component neighboring reference value to a preset factor calculation model.

A method for transmitting a bitstream, comprising:

• executing the following operations to generate a bitstream, and transmitting the bitstream:
• determining a luma component neighboring reference value and a luma component reconstructed value corresponding to a current block, wherein the luma component neighboring reference value is indicative of a luma component parameter corresponding to a neighboring reference sample of the current block, and wherein the luma component reconstructed value is indicative of one or more reconstructed parameters of a luma component corresponding to the current block;
• and
• determining a chroma component predicted value corresponding to the current block at least based on a weight coefficient corresponding to the neighboring reference sample related to a position of the current block and the neighboring reference sample;
• and
• encoding a video at least based on the chroma component predicted value, wherein a scaling factor is determined by inputting the weight coefficient, the luma component neighboring reference value and the chroma component neighboring reference value to a preset factor calculation model.