Motion vector difference coding extension for enhancement layer

摘要

An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores difference video information associated with a difference video layer of pixel information derived from a difference between an enhancement layer and a corresponding base layer of the video information. The processor determines pixel accuracy of motion predictor information, determines a motion vector based on the pixel accuracy of the motion predictor information, and determines a value of a video unit based at least in part on the motion vector.

主权项

1. An apparatus configured to code video information, the apparatus comprising:
a memory unit configured to store difference video information associated with a difference video layer of pixel information derived from a difference between an enhancement layer and a corresponding base layer of the video information; and a processor in communication with the memory unit, the processor configured to:
determine pixel accuracy of a motion vector predictor of a video unit;determine whether a reference video unit including the motion vector predictor is associated with the difference video layer;code a motion vector delta of the video unit based on the determined accuracy of the motion vector predictor and the determination of whether the reference video unit is associated with the difference video layer;determine a context for coding the motion vector delta based on the determined accuracy of the motion vector predictor and the determination of whether the reference video unit is associated with the difference video layer;determine the motion vector for the video unit based on the coded motion vector delta, wherein the motion vector is generated by adding the motion vector delta and the motion vector predictor; andgenerate a prediction unit for the video unit using the motion vector.