Methods and devices for geometric partitioning mode with adaptive blending

An apparatus for video decoding, comprising:

• one or more processors;
• and
• a memory coupled to the one or more processors and configured to store instructions executable by the one or more processors,
• wherein the one or more processors, upon execution of the instructions, are configured to perform operations comprising:
• obtaining a geometric partition mode (GPM) blending area index at a certain level associated with a picture, wherein the GPM blending area index indicates a blending area width from a set of blending area widths, wherein the blending area width indicates a width of a blending area which is defined by a number of samples on each side of a GPM partition;
• obtaining, based on the blending area width indicated by the GPM blending area index, one or more weighting values that are used to blend prediction samples of a GPM mode;
• and
• obtaining, based on the one or more weighting values, a GPM predictor.

A method for transmitting a bitstream to be decoded by operations comprising:

• obtaining, by a decoder, a geometric partition mode (GPM) blending area index at a certain level associated with a picture, wherein the GPM blending area index indicates a blending area width from a set of blending area widths, wherein the blending area width indicates a width of a blending area which is defined by a number of samples on each side of a GPM partition;
• obtaining, by the decoder and based on the blending area width indicated by the GPM blending area index, one or more weighting values that are used to blend prediction samples of a GPM mode;
• and
• obtaining, by the decoder and based on the one or more weighting values, a GPM predictor.