Combined reference picture list construction and mapping

A video coding device comprising:

• a memory configured to store reference pictures;
• and
• a video coder configured to:
• construct a first reference picture list and a second reference picture list from the stored reference pictures;
• construct a combined reference picture list that includes one or more reference pictures that are mapped to corresponding reference pictures in the first reference picture list and the second reference picture list;
• if one of the reference pictures in the combined reference picture list corresponds to reference pictures in both of the first reference picture list and the second reference picture list, map that reference picture in the combined reference picture list to one of the corresponding reference pictures in one of, and not both of, the first and second reference picture lists;
• and
• code a current picture based on the mapping.

A non-transitory computer-readable storage medium comprising instructions that, when executed, cause a video coder to:

• construct a first reference picture list and a second reference picture list;
• construct a combined reference picture list that includes one or more reference pictures that are mapped to corresponding reference pictures in the first reference picture list and the second reference picture list;
• if one of the reference pictures in the combined reference picture list corresponds to reference pictures in both of the first reference picture list and the second reference picture list, map the reference picture in the combined reference picture list to one of the corresponding reference pictures in one of, but not both of, the first and second reference picture lists;
• and
• code a current picture based on the mapping.

A video coding device comprising:

• means for constructing a first reference picture list and a second reference picture list;
• means for constructing a combined reference picture list that includes one or more reference pictures that are mapped to corresponding reference pictures in the first reference picture list and the second reference picture list;
• means for mapping that reference picture in the combined reference picture list if one of the reference pictures in the combined reference picture list corresponds to reference pictures in both of the first reference picture list and the second reference picture list, to one of the corresponding reference pictures in one of, but not both of, the first and second reference picture lists;
• and
• means for coding a current picture based on the mapping.