Fast half-pixel motion estimation using steepest descent

Details Fast half-pixel motion estimation using steepest descent Fast half-pixel motion estimation using steepest descent

2006-02-07

2006-02-07

Le, Vu (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240170

Reexamination Certificate

active

06996180

ABSTRACT:
A method of locating a half-pixel resolution motion vector. The method first determines a sum of absolute difference for a predetermined number of neighbors to a current pixel. The gradient of these sums of absolute differences is then calculated. A motion vector is then selected based upon the gradient that indicates which vector lies in a direction of steepest descent. This motion vector is then used in motion compensation for video compression.

REFERENCES:
patent: 5623313 (1997-04-01), Naveen
patent: 6141382 (2000-10-01), Krishnamurthy et al.
patent: 6442203 (2002-08-01), Demos
Netravali et al., “A codec for HDTV”, IEEE Transactions on Consumer Electronics, vil. 38, Issue: 3, pp. 325-340, Aug. 1992.

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