Motion compensation considering out-of-boundary conditions in video coding

A method for video coding, comprising:

• determining, by an encoder, whether a predictor sample of a reference picture for a current coding block is out-of-boundary (OOB);
• in response to determining that the predictor sample is OOB, assigning, by the encoder, a zero additional weighting to the predictor sample in combining two or more predictor samples generated by a motion compensation process to obtain a final predictor sample for the current coding block;
• and
• in response to determining that the predictor sample is not OOB, assigning, by the encoder, a non-zero additional weighting to the predictor sample in combining the two or more predictor samples generated by the motion compensation process to obtain the final predictor sample for the current coding block.

A method for storing a bitstream, comprising:

• performing an encoding method to generate the bitstream;
• and
• storing the bitstream,
• wherein the encoding method comprises:
• determining, by an encoder, whether a predictor sample of a reference picture for a current coding block is out-of-boundary (OOB);
• in response to determining that the predictor sample is OOB, assigning, by the encoder, a zero additional weighting to the predictor sample in combining two or more predictor samples generated by a motion compensation process to obtain a final predictor sample for the current coding block;
• and
• in response to determining that the predictor sample is not OOB, assigning, by the encoder, a non-zero additional weighting to the predictor sample in combining the two or more predictor samples generated by the motion compensation process to obtain the final predictor sample for the current coding block.