Coding motion vector difference
AssigneeQUALCOMM Incorporated
InventorsJianle Chen, Vadim Seregin, Xianglin Wang, Marta Karczewicz
Life of this patent
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Abstract
The techniques described in this disclosure may be generally related to identifying when motion vector difference (MVD) is skipped for one or both reference picture lists. The techniques may further relate to contexts for signaling MVD values. The techniques may also be related to syntax that indicates when at least one of the MVD values is zero.
Claims41
A method for coding video data, the method comprising:
- coding a first motion vector difference (MVD) value for a first motion vector of a bi-predicted block that refers to a picture in a first reference picture list with a first context model;
- and
- coding a second MVD value for a second motion vector of the bi-predicted block that refers to a picture in a second reference picture list with a second, different context model.
A device for coding video data, the device comprising a video coder configured to:
- code a first motion vector difference (MVD) value for a first motion vector of a bi-predicted block that refers to a picture in a first reference picture list with a first context model;
- and
- code a second MVD value for a second motion vector of the bi-predicted block that refers to a picture in a second reference picture list with a second, different context model.
A computer-readable storage medium having instructions stored thereon that when executed cause one or more processors to:
- code a first motion vector difference (MVD) value for a first motion vector of a bi-predicted block that refers to a picture in a first reference picture list with a first context model;
- and
- code a second MVD value for a second motion vector of the bi-predicted block that refers to a picture in a second reference picture list with a second, different context model.
A device comprising:
- means for coding a first motion vector difference (MVD) value for a first motion vector of a bi-predicted block that refers to a picture in a first reference picture list with a first context model;
- and
- means for coding a second MVD value for a second motion vector of the bi-predicted block that refers to a picture in a second reference picture list with a second, different context model.
Dependencies are inferred from the claim text.