System and method for two-pass interpolation for quarter-pel motion compensation
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United States of America Patent
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Mar 17, 2009
Grant Date -
Sep 8, 2005
app pub date -
Nov 9, 2004
filing date -
Mar 4, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and systems for processing a video signal are disclosed herein. Pixels may be interpolated utilizing at most two passes. During a first of the two passes, an aligned sub-pixel value may be interpolated utilizing a plurality of integer pixel values, if the aligned sub-pixel value is horizontally or vertically aligned with the plurality of integer pixel values. During a second of the two passes, a non-aligned sub-pixel value may be interpolated utilizing the interpolated aligned sub-pixel value, if the non-aligned sub-pixel value is not horizontally or vertically aligned with the plurality of integer pixel values. The aligned sub-pixel value may be interpolated utilizing 4-tap filtering of the integer pixel values.
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