Weighted prediction parameter coding

摘要

The techniques are generally related to the coding of weighted prediction parameters. A video coder may determine the weighted prediction parameters for a reference picture list based on coded weighted prediction parameters for another reference picture list. Examples of the reference picture list include reference picture lists constructed for coding purposes, including a combined reference picture list.

主权项

1. A method for coding video data, the method comprising:
constructing a first list and a second list, wherein the first list and the second list each include reference pictures used for inter-predicting one or more blocks of the video data within a current picture; coding weighted prediction parameters for the first list, wherein the weighted prediction parameters define scaling factors by which pixel values within respective reference pictures in the first list are to be scaled for inter-predicting a block in the current picture; coding a syntax element indicating that the first list is longer than the second list and that a first N entries of the first list are identical to a first N entries of the second list; determining weighted prediction parameters for the second list based on the weighted prediction parameters for the first list and based on the syntax element indicating that the first list is longer than the second list and that the first N entries of the first list are identical to the first N entries of the second list, wherein the second list includes reference pictures used for inter-predicting one or more blocks within the current picture; and inter-predicting the block in the current picture based at least on one or more of the weighted prediction parameters for the first list that are coded and the determined weighted prediction parameters for the second list.