US 2019/0058897 A1 · DYNAMIC MOTION VECTOR REFERENCING FOR VIDEO CODING

Abstract

Dynamic motion vector referencing is used to predict motion within video blocks. A motion trajectory is determined for a current frame including a video block to encode or decode based on a reference motion vector used for encoding or decoding one or more reference frames of the current frame. One or more temporal motion vector candidates are then determined for predicting motion within the video block based on the motion trajectory. A motion vector is selected from a motion vector candidate list including the one or more temporal motion vector candidates and used to generate a prediction block. The prediction block is then used to encode or decode the video block. The motion trajectory is based on an order of video frames indicated by frame offset values encoded to a bitstream. The motion vector candidate list may include one or more spatial motion vector candidates.

Claims20

Dependent claims

A method for encoding a current block of a current frame, the method comprising:

determining a motion trajectory for the current frame based on a reference motion vector used for encoding one or more reference frames of the current frame;
determining one or more temporal motion vector candidates for predicting motion within the current block based on the motion trajectory;
selecting a motion vector from a motion vector candidate list including the one or more temporal motion vector candidates;
generating a prediction block using the selected motion vector;
and
encoding the current block using the prediction block.

3 more elements

A method for decoding an encoded block of an encoded frame, the method comprising:

determining a motion trajectory for the encoded frame based on a reference motion vector used for decoding one or more reference frames of the encoded frame;
determining one or more temporal motion vector candidates for predicting motion within the encoded block based on the motion trajectory;
selecting a motion vector from a motion vector candidate list including the one or more temporal motion vector candidates;
generating a prediction block using the selected motion vector;
and
decoding the encoded block using the prediction block.

3 more elements

An apparatus for decoding an encoded block of an encoded frame, the apparatus comprising:

a processor configured to execute instructions stored in a non-transitory memory to:
determine a motion trajectory for the encoded frame based on a reference motion vector used to decode one or more reference frames of the encoded frame;
determine one or more temporal motion vector candidates for predicting motion within the encoded block based on the motion trajectory;
select a motion vector from a motion vector candidate list including the one or more temporal motion vector candidates;
generate a prediction block using the selected motion vector;
and
decode the encoded block using the prediction block.

4 more elements

Dependencies are inferred from the claim text.

Dynamic motion vector referencing for video coding

Life of this patent

Dynamic motion vector referencing for video coding

Life of this patent

Abstract

Claims20