Methods and apparatuses for encoding and decoding video using temporal motion vector prediction

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 including at least one temporal motion vector predictor derived from at least one motion vector from a collocated reference picture;
• 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.

An apparatus for encoding a video into a coded video bitstream with temporal motion vector prediction, the apparatus comprising:

• a control unit operable to determine 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;
• a writing unit operable to write the flag having said value into a header of the sub-picture unit or a header of the picture;
• a motion vector prediction unit;
• and
• an inter-picture prediction unit for performing inter-picture prediction based on a selected motion vector predictor from the motion vector prediction unit,
• wherein the motion vector prediction unit is configured to receive the flag and based on the flag being a first value, the motion vector prediction unit is operable to create 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, and select a motion vector predictor out of the first list for a prediction unit in the sub-picture unit;
• and
• the writing unit is further operable to write a first parameter into the coded video bitstream for indicating the selected motion vector predictor out of the first list.