"bi-prediction" and "uni-prediction" are referred in 3.90, 3.91 and 3.92 for defining referece picture list 0/1 and reference picture lists combination. But they are not defined.

And, it is unclear if list 0 and list 1 can be used for uni-prediction.

And then, the "list 0 prediction" is referred in 7.3.4.7 (Weighted prediction parameters semantics), but there is no defintion on it.

Revisions to be considered;

1. Need to clarify definitions of "bi-prediction", "uni-prediction" and "list 0/1 prediction", and
2. Need to clarify definitions of reference picture list 0/1 about the use of uni-prediction.