Adaptive resolution for single-reference motion vector difference

A method of video encoding, comprising:

• receiving video data;
• determining that a first single-reference inter-prediction mode from a set of single-reference inter-prediction modes is enabled for one or more video blocks of the video data, wherein the set of single-reference inter-prediction modes includes an adaptive motion vector difference (MVD) mode, a NEWMV mode, a NEARMV mode, and a GLOBALMV mode;
• when the first single-reference inter-prediction mode from the set of single-reference inter-prediction modes is the adaptive MVD mode, selecting a current MVD pixel resolution from a set of available MVD pixel resolutions;
• encoding the one or more video blocks according to the current MVD pixel resolution;
• and
• signaling, via a video bitstream, an inter-prediction syntax element indicating that the first single-reference inter-prediction mode is enabled for the one or more video blocks.

A non-transitory computer-readable recording medium storing a video bitstream that is generated by a video encoding method, the method comprising:

• receiving video data;
• determining that a first single-reference inter-prediction mode from a set of single-reference inter-prediction modes is enabled for one or more video blocks of the video data, wherein the set of single-reference inter-prediction modes includes an adaptive motion vector difference (MVD) mode, a NEWMV mode, a NEARMV mode, and a GLOBALMV mode;
• when the first single-reference inter-prediction mode from the set of single-reference inter-prediction modes is the adaptive MVD mode, selecting a current MVD pixel resolution from a set of available MVD pixel resolutions;
• and
• encoding the one or more video blocks according to the current MVD pixel resolution, wherein the video bitstream comprises the encoded one or more video blocks and an inter-prediction syntax element indicating that the first single-reference inter-prediction mode is enabled for the one or more video blocks.