Video coding system
First Claim
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1. A motion estimation system for a video coder comprising:
- means for receiving a video frame to be coded;
a series of motion estimators of varying complexity, for estimating a motion vector field between the said received frame and a reference frame; and
control means for selecting the subsequent motion estimator in the series only if a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold.
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Abstract
A motion estimation system for a video coder is disclosed. The system comprises an input for a video image (6) to be coded. It also comprises a series of motion estimators (2, 3) of varying complexity, for estimating a motion vector field between the received image (6) and a reference image (5). The subsequent motion estimator in the series is selected by a control means (4) if a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold.
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Citations
13 Claims
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1. A motion estimation system for a video coder comprising:
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means for receiving a video frame to be coded;
a series of motion estimators of varying complexity, for estimating a motion vector field between the said received frame and a reference frame; and
control means for selecting the subsequent motion estimator in the series only if a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A motion estimation method for coding a video frame, comprising:
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receiving a video frame to be coded;
estimating a motion vector field between the said received frame and a reference frame, using a motion estimator from a series of motion estimators of varying complexity;
determining whether a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold and, only if so, selecting the subsequent motion estimator in the series.
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Specification