Hierarchical coding of motion vector fields

Image sequences are mostly coded by motion compensated predictive coding. The motion vector field to be transmitted as side information is typically predictive coded. In this paper a new approach is presented for coding of motion vector fields at low bit rates (<64 kbit/s) more efficiently by applying a pyramid decomposition, which is encoded using zero-trees. The embedded coding of the pyramid allows for progressive transmission of the motion vectors and is well suited for source adaptive channel coding