Storage of high precision motion vectors in video coding

A method for decoding video data, the method comprising:

• determining a motion vector for a block of video data;
• performing a motion vector refinement process for the motion vector to produce a refined motion vector;
• determining an effective motion vector range based on a bit-depth of the motion vector and a motion vector precision of the motion vector;
• clipping the refined motion vector to the effective motion vector range to produce a clipped motion;
• and
• decoding the block of video data using the clipped motion vector.

A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors configured to decode video data to:

• determine a motion vector for a block of video data;
• perform a motion vector refinement process for the motion vector to produce a refined motion vector;
• determine an effective motion vector range based on a bit-depth of the motion vector and a motion vector precision of the motion vector;
• clip the refined motion vector to the effective motion vector range to produce a clipped motion vector;
• and
• decode the block of video data using the clipped motion vector.

An apparatus configured to encode video data, the apparatus comprising:

• a memory configured to store video data;
• and
• one or more processors in communication with the memory, the one or more processors implemented in circuitry, the one or more processors configured to:
• determine a motion vector for a block of video data;
• perform a motion vector refinement process for the motion vector to produce a refined motion vector;
• determine an effective motion vector range based on a bit-depth of the motion vector and a motion vector precision of the motion vector;
• clip the refined motion vector to the effective motion vector range to produce a clipped motion vector;
• and
• encode the block of video data using the clipped motion vector.