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US 8,411,757 B2Granted
Apparatus, and associated method, for forming a compressed motion vector field utilizing predictive motion coding
AssigneeNokia Corporation
InventorsMarta Karczewicz, Jani Lainema, Bogdan-Paul Dobrin
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Abstract
Apparatus, and an associated method, motion compensates coding of video sequences. Motion compensated prediction is utilized in the representation of motion vector fields. Reduced numbers of bits are required to represent the motion vector field while maintaining a low prediction error, thereby facilitating improved communication of, and recreation of, video frames forming a video sequence.
Claims6
A method comprising:
- retrieving a motion predictor indication for a first segment of a video frame from encoded data representative of a sequence of video frames;
- identifying one neighboring segment from a plurality of segments adjacent to the first segment based on the motion predictor indication;
- retrieving refinement information for motion coefficients for the first segment;
- and
- deriving motion coefficients for the first segment based on motion coefficients of the identified neighboring segment by at least summing the refinement information to a prediction based on the motion coefficients of the identified neighboring segment.
2 more elements
A decoder comprising:
- a demultiplexor configured to:
- retrieve a motion predictor indication for a first segment of a video frame from encoded data representative of a sequence of video frames;
- identify one neighboring segment from a plurality of segments adjacent to the first segment based on the motion predictor indication;
- and
- retrieve a refinement information for motion coefficients for the first segment;
- and
- a motion compensated predictor configured to derive motion coefficients for the first segment based on motion coefficients of the identified neighboring segment by at least summing the refinement information to a prediction based on the motion coefficients of the identified neighboring segment.
4 more elements
A decoder comprising:
- means for retrieving a motion predictor indication for a first segment of a video frame from encoded data representative of a sequence of video frames;
- means for identifying one neighboring segment from a plurality of segments adjacent to the first segment based on the motion predictor indication;
- means for retrieving a refinement information for motion coefficients for the first segment;
- and
- means for deriving motion coefficients for the first segment based on the motion coefficients of the identified neighboring segment by at least summing the refinement information to a prediction based on the motion coefficients of the identified neighboring segment.
2 more elements
Dependencies are inferred from the claim text.