Separable motion vector predictor components in video encoding

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause the one or more processors to:

• determine a reference block and a residual vector from an encoded bitstream;
• determine an indexed predictor table from the encoded bitstream, wherein the indexed predictor table comprises a first index corresponding to a first vector predictor having a first decoded vector of a first decoded block, a second index corresponding to a second vector predictor having a second decoded vector of a second decoded block, and a third index corresponding to a third vector predictor having a first component of the first decoded vector and a second component of the second decoded vector;
• determine a corresponding vector predictor in the indexed predictor table based on an index of the indexed predictor table signaled in the encoded bitstream;
• determine a reconstructed vector based on the corresponding vector predictor and the residual vector;
• and
• apply the reconstructed vector to the reference block to produce a predicted block.

An apparatus, comprising:

• one or more processors for executing instructions;
• and
• one or more non-transitory computer-readable media storing the instructions, the instructions causing the one or more processors to:
• determine a reference block and a residual vector from an encoded bitstream;
• determine an indexed predictor table from the encoded bitstream, wherein the indexed predictor table comprises a first index corresponding to a first vector predictor having a first decoded vector of a first decoded block, a second index corresponding to a second vector predictor having a second decoded vector of a second decoded block, and a third index corresponding to a third vector predictor having a first component of the first decoded vector and a second component of the second decoded vector;
• determine a corresponding vector predictor in the indexed predictor table based on an index of the indexed predictor table signaled in the encoded bitstream;
• determine a reconstructed vector based on the corresponding vector predictor and the residual vector;
• and
• apply the reconstructed vector to the reference block to produce a predicted block.