Selecting between dominant and non-dominant motion vector predictor polarities

摘要

Techniques and tools for selecting between dominant and non-dominant polarities for motion vector predictors are described. For example, a video decoder determines dominant and non-dominant polarities for a motion vector predictor, decodes signaled information that indicates a selection between the dominant and non-dominant polarities, and determines the motion vector predictor from the dominant and non-dominant polarities and the signaled information. The decoder reconstructs a motion vector from the motion vector predictor and motion vector differential information. A video encoder performs corresponding processing.