Spatially adaptive subsampling of HDTV using motion information

Ricardo A. F. Belfor; Reginald L. Lagendijk; Jan Biemond

doi:10.1117/12.131474

1 November 1992 Spatially adaptive subsampling of HDTV using motion information

Ricardo A. F. Belfor, Reginald L. Lagendijk, Jan Biemond

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131474
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

For the transmission of HDTV-signals a data reduction is necessary. In currently implemented systems this data reduction is achieved using sub-Nyquist sampling for the stationary part of the image sequence. If the concept of sub-Nyquist is to be extended to moving parts of the scene, the problem of critical velocities is introduced. We propose to solve this problem by shifting the sampling lattice according to the motion, in such a way that no discarded pixels are present in the direction of the displacements. As such this method can be called motion compensated sub-Nyquist sampling. We show how this algorithm can be extended to incorporate fractional accuracy of the motion estimation and combinations with other subsampling structures. The control structure is based on the results of an error analysis of motion compensated interpolation schemes. The experimental results show a improved performance compared to fixed subsampling and nonadaptive sub-Nyquist sampling.

Citation Download Citation

Ricardo A. F. Belfor, Reginald L. Lagendijk, and Jan Biemond "Spatially adaptive subsampling of HDTV using motion information", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131474

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