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Global Motion Compensation in MPEG4

jburford1
Beginner
431 Views
Hello.

After looking at the MPEG4 encoder and decoder code, it looks like there might be some support for Global Motion Compensation (GMC). Does anyone know if/how it works?

Thanks!
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Vladimir_Dudnik
Employee
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Hello,

as you can see in mpeg4 decoder and encoder readme files:

The decoder supports the standard ISO/IEC 14496-2 with certain restrictions. Only the following features are supported in the current version:

  • I-VOP

  • P-VOP

  • B-VOP
  • S-VOP
  • AC/DC Prediction

  • 4MV

  • Un-restricted MV

  • P-VOP with OBMC

  • Quantisation Method 1,2

  • Videopackets

  • Short video header

  • Data partitioning
  • Reversible VLC
  • Basic sprites
  • Interlacing
  • Quarter-Pixel Motion Compensation
  • Global Motion Compensation

The encoder supports the standard ISO/IEC 14496-2 with certain restrictions. Only the following features are supported in the current version:

  • I-VOP

  • P-VOP

  • B-VOP
  • S-VOP
  • AC/DC Prediction

  • 4MV

  • Un-restricted MV

  • P-VOP with OBMC

  • Quantisation Method 1,2

  • Videopackets

  • Short video header

  • Data partitioning
  • Reversible VLC
  • Interlacing
  • Basic sprites
  • Quarter-Pixel Motion Estimation
  • Global Motion Estimation
  • VBR and CBR Control

Regards,
Vladimir

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