Wikipedia

Motion interpolation

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Motion interpolation is a form of de-judder video processing used in various display devices such as HDTVs and video players. New frames are interpolated and inserted between standard frames to smooth the picture. Films are recorded at a frame rate of 24 frames per second (frame/s) and television is typically filmed at 25, 50, 30 or 60 frames per second (the first two being PAL, the other two from NTSC). Display devices such as HDTVs may have a refresh rate of 60, 100, 120 or even 200[1] Hz. The display device can repeat the standard frames or insert new frames that are interpolated on the fly.

Mock-up of a motion interpolation of a horse and rider galloping. Each two original frames on the top have an interpolated frame between them on the bottom.

HDTV

A number of HDTVs use frame interpolation to reduce judder, although not all 120 Hz HDTVs include a motion interpolation feature. Mitsubishi's 120 Hz HDTVs do not include de-judder processing. Anti judder technology is not the same as motion blur reducing technology, but is frequently lumped together with it.[2]

Each manufacturer has a different name for their implementation of motion interpolation.

  • Sony - MotionFlow 100Hz, 100Hz PRO (XBR series, Australia), 120Hz, 200Hz.[3]
  • Samsung - Auto Motion Plus 120 Hz[4]
  • Philips - HD Digital Natural Motion[5]
  • Hitachi - Reel120[6]
  • Vizio - MEMC (Motion Estimation, Motion Compensation)[7]
  • LG - TruMotion 120hz

PC video players

WinDVD uses Philips' TrimensionDNM for frame interpolation.[8]

Crystalplayer uses Motion Morphing MultiSampling for frame interpolation.[9]

Effect

According to CNET.com executive editor David Carnoy, with Sony's MotionFlow objects look more stable when the feature is turned on. This is sometimes accompanied by a glitch in the picture.[2] Not everyone likes the effect and some complain that it gives film a "video" look.[7]

See also

References

  1. ^ "Sony new 200hz motionflow technology". Retrieved 2008-10-19.
  2. ^ a b Carnoy, David (October 25, 2007). "Six things you need to know about 120 Hz LCD TVs". CNET.com. Retrieved 2008-02-02.
  3. ^ SONY UNVEILS FIRST BRAVIA FLAT-PANEL LCD HDTVs WITH INTERNET VIDEO LINK COMPATIBILITY
  4. ^ Samsung LN-T4071F
  5. ^ Trimension
  6. ^ Hitachi to Unveil New Line of Ultra Thin LCDs at CES
  7. ^ a b Moskovciak, Matthew (January 8, 2008). "Vizio adds 120 Hz LCDs to its lineup". CNET.com. Retrieved 2008-02-01.
  8. ^ Intervideo WinDVD 8 Platinum
  9. ^ Crystal Reality - ultimate video and multimedia solutions for PC, Symbian and PocketPC platforms
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