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Advanced motion estimation for standards conversion and slow motion

: Ernst, M.; Grasse, M.; Hohne, H.D.; Dalstein, T.

Ohta, N. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; European Optical Society -EOS-:
High-definition video : 5 - 6 April 1993, Berlin, FRG, held as part of the International Symposium on Video Communications and Fiber Optic Networks
Bellingham/Wash.: SPIE, 1993 (SPIE Proceedings Series 1976)
ISBN: 0-8194-1222-8
Conference on High Definition Video <1993, Berlin>
International Symposium on Video Communications and Fiber Optic Networks <1993, Berlin>
Conference Paper
Fraunhofer HHI ()
adaptive filters; high definition television; image sequences; interpolation; motion estimation; multidimensional digital filters; television standards; standards conversion; frame rate conversion; slow motion generation; HDTV; periodical structures; noise; spatio/temporal cut-off frequencies; interpolation filter; computer simulation; spatial resolution; motion complexity

A advanced method for motion estimation and interpolation for frame rate conversion and slow motion generation of HDTV is based on a 3-D space- and time-variant filter adapted to the motion. The main problems of basic motion estimation algorithms are analysed. The resulting motion information becomes unacceptable, especially in image areas with periodical structures, in the presence of noise or on moving object boundaries. This approach increases the reliability of motion information in those areas and the detection of occluding, appearing and disappearing areas. The spatio/temporal cut-off frequencies of the interpolation filter are controlled taking into account this information. Results of computer simulation are presented on a set of sequences, which are critical with respect to the spatial resolution and motion complexity.