Parametric Motion Vector Derivation for Video Coding
Patent 10039/TUB

This method is used in the video software industry or in online video portals and enables, among other things, data rates in video coding processes to be reduced but not increased.

  1. Bit rate reduction
  2. Data rate can only be reduced, but not increased
  3. Easy to apply
Possible Applications

Video Software Industry, Online Video Portals


Video encoding methods save motion vector fields locally in a buffer to predict the following frames, thus reducing the size of the error pattern that is needed to decode the frames. This so-called motion-compensated prediction derives the motion vector field for the motion of pixel blocks from frame to frame. If several pixel blocks have identical motion vectors, it is sufficient to save only one of these pixel blocks. In this way it is possible to further reduce the amount of necessary data by 4 to 5 %.

Technical Description

The presented method reduces the amount of data even further, by using a model with 8 parameters of a higher order. We have to consider, that motion vectors which can be derived from a so-called warping matrix are not transmitted separately. Here the error rate decreases with the increase of the number of parameters. The decoder uses the motion parameters to reconstruct the vector field. Remaining motion vectors are transmitted without additional manipulation. Therefore, the amount of data that is transmitted can only decrease, an increase is not possible.

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Ina Krüger

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Technology Readiness Level

Technology concept formulated

Property Rights

approved: US

Patent Holder

Technische Universität Berlin

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