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US 10,382,778 B2Granted
Method for motion vector storage in video coding and apparatus thereof
AssigneeMediaTek Singapore Pte. Ltd.
InventorsHan Huang, Kai Zhang, Jicheng An
Life of this patent
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Abstract
Apparatus and methods are described for a video encoder that uses reference motion vectors (MVs) with reduced precision to generate predicted MVs. The video encoder receives a block of pixels of a video frame and generates a MV for encoding the block of pixels by motion compensation. The video encoder creates a reduced-precision MV by reducing a precision of the generated MV based on a precision reduction scaling factor. The video encoder also stores the reduced-precision MV in a MV buffer as a reference MV for temporal or spatial MV prediction.
Claims20
A method comprising:
- generating a motion compensation motion vector (MV) to encode or decode a block of pixels;
- and
- creating a reduced-precision MV by reducing a precision of the generated MV based on a precision reduction scaling factor;
- storing the reduced-precision MV in a MV buffer as a reference MV;
- retrieving the reference MV from the MV buffer;
- creating a restored-precision reference MV by restoring a precision of the retrieved reference MV according to a precision restoration scaling factor;
- and
- computing a predicted MV based on the restored-precision reference MV and a MV prediction mode.
5 more elements
An electronic apparatus comprising:
- a motion compensation circuit capable of using a motion compensation motion vector (MV) to construct a pixel block;
- a precision reduction circuit capable of reducing a precision of the motion compensation MV based on a precision reduction scaling factor to create a reduced-precision motion compensation MV;
- a MV buffer capable of storing the reduced-precision motion compensation MV as one of a plurality of reference MVs;
- a precision restoration circuit capable of receiving a reference MV from the MV buffer, the precision restoration circuit also capable of restoring a precision of the received reference MV according to a precision restoration scaling factor to create a restored-precision reference MV;
- and
- a MV predicting circuit capable of computing a predicted MV based on the restored-precision reference MV.
3 more elements
Dependencies are inferred from the claim text.