METHODS AND APPARATUSES FOR ENCODING AND DECODING VIDEO USING TEMPORAL MOTION VECTOR PREDICTION

摘要

A method of encoding a video into a coded video bitstream with temporal motion vector prediction comprises: determining a value of a flag for indicating whether temporal motion vector prediction is used or not used for the inter-picture prediction of a sub-picture unit of a picture; and writing the flag having the value into a header of the sub-picture unit or a header of the picture; wherein if the flag indicates that temporal motion vector prediction is used, the method further comprises: creating a first list of motion vector predictors comprising a plurality of motion vector predictors including at least one temporal motion vector predictor derived from at least one motion vector from a collocated reference picture; selecting a motion vector predictor out of the first list; and writing a first parameter into the coded video bitstream for indicating the selected motion vector predictor out of the first list.

主权项

1. A method of decoding a coded video bitstream with temporal motion vector prediction, the method comprising:
parsing a flag from a header a sub-picture unit or a header of a picture of the coded video; and determining whether the flag indicates that temporal motion vector prediction is used or not used; wherein if the flag indicates that temporal motion vector prediction is used, the method further comprises: creating a first list of motion vector predictors comprising a plurality of motion vector predictors derived from at least one motion vector from a collocated reference picture; and parsing a first parameter from the coded video bitstream which indicates a selected motion vector predictor out of the first list for a prediction unit in the sub-picture unit; and wherein if a temporal layer of the picture is determined to be the lowest or base layer, the flag is set to indicate that temporal motion vector prediction is not used; otherwise, the flag is set to indicate that temporal motion vector prediction is used.