Block matching motion estimation apparatus employing a weight fu

Details Block matching motion estimation apparatus employing a weight fu Block matching motion estimation apparatus employing a weight fu

1997-03-17

1998-09-15

Au, Amelia

Television

Bandwidth reduction system

Data rate reduction

348699, H04N 736

Patent

active

058086854

ABSTRACT:
A blocking matching motion estimation apparatus estimates a displacement of a search block in a current frame with respect to each of candidate blocks in a previous frame to produce motion vectors and error signals representing the similarity between the search block and a candidate block. The motion estimating apparatus employs a weight function to weight a number of error signals based on a MSE measurement and selects a weighted error signal entailing a minimum error to produce a motion vector corresponding thereto. The weight function is determined by using either a local variance for a localized subblock defined for each pixel in the search block or a gradient of pixels in the search block filtered by a 2-dimensional gradient filter.

REFERENCES:
patent: 5333012 (1994-07-01), Singhal et al.
patent: 5515105 (1996-05-01), Lim
patent: 5543845 (1996-08-01), Asamura et al.

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