Interpolation filtering method for accurate sub-pixel motion assessment
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United States of America Patent
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May 29, 2007
Grant Date -
N/A
app pub date -
Jul 11, 1998
filing date -
Jul 15, 1997
priority date (Note) -
Expired
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Abstract
To generate an improved image signal when estimating motion, a motion vector is first determined with pel accuracy, and a two-step interpolation filtering is subsequently carried out with sub-pel accuracy. The interpolation coefficients are selected with a view to reducing aliasing. More neighboring pixels are used for the interpolation than in usual interpolation methods. One is able to improve the quality of the prediction signal for video images and, consequently, enhance coding efficiency.
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