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US 5,212,548 AGranted
Apparatus for motion vector estimation with asymmetric update region
AssigneeU.S. Philips Corporation
InventorsGerard de Haan, Hendrik Huijgen
Life of this patent
Estimating the term…
Abstract
In a motion estimator which adds small increments (P-2, P-4) to a prediction vector (P) to obtain a number of candidate vectors (2,4) from which an output vector is selected, a first increment (P-2) in a first direction has a different magnitude from a second increment (P-4) in a second direction.
Claims17
A block matching motion estimation apparatus for matching pixel values of blocks in a given field to pixel values in blocks of a previous field shifted relative to corresponding blocks in said given field by x and y values constituting components of an output motion vector, said apparatus comprising:
- a) a delay furnishing a delayed output motion vector constituting a prediction vector,
- b) a candidate motion vector generator connected to said delay for adding at least first and second increment vectors having mutually different directions to said prediction vector thereby generating at least first and second candidate motion vectors, and
- c) a selection circuits for selecting said output motion vector from said candidate motion vectors, wherein said first increment vector has a first vector length and said second increment vector has a second vector length different from said first vector length.
Dependencies are inferred from the claim text.