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Qpel
also called Q-pel or Qpel

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  1. Quarter pixel refers to a quarter of a standard pixel

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
  2. used in many modern video encoding standards such as MPEG-4 ASP and H.264/AVC to refer to quarter pixel precision in motion estimation and motion compensation

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
  3. Videos encoded with quarter-pixel precision motion vectors require up to twice as much processing power to encode, and 30-60% more processing power to decode

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
  4. Though higher precision motion vectors take more bits to encode, they can result in more efficient compression, both through the decreased bit cost of the residual and the increased quality of the macroblock

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
  5. Video encoding software products such as Xvid, 3ivx, and DivX Pro Codec which are based upon the MPEG-4 specification, use motion estimation algorithms to significantly improve video compression

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
  6. Quarter-pixel motion compensation, much like half-pixel, is achieved through interpolation

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 26, 2009
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