Improving the efficiency of MPEG-2 coding by means of film unsteadiness correction

Theodore Vlachos

doi:10.1117/12.251316

16 September 1996 Improving the efficiency of MPEG-2 coding by means of film unsteadiness correction

Theodore Vlachos

Proceedings Volume 2952, Digital Compression Technologies and Systems for Video Communications; (1996) https://doi.org/10.1117/12.251316
Event: Advanced Imaging and Network Technologies, 1996, Berlin, Germany

Abstract

The performance of MPEG-2 coders with regard to bit-rate reduction of unsteady film sequences is assessed. Sequences impaired both by hop-and-weave and twin-lens flicker artifacts are considered. It is shown that the removal of such artifacts improves the performance of an MPEG-2 coder significantly. In the spatial domain, improvements are due to the suppression of high frequencies artificially boosted by twin-lens flicker. In the temporal domain, the correction of hop-and-weave unsteadiness simplifies the motion estimation process considerably. As a consequence, the coding effort is focused mainly on picture content rather than being consumed by bit-rate reducing the unsteadiness artifacts. Our results show considerable improvement of subjective picture quality and of measured mean-square error for a constant bit-rate reduction ratio. Moreover, improved bandwidth efficiency can be achieved for the same level of objective or subjective distortion.

Citation Download Citation

Theodore Vlachos "Improving the efficiency of MPEG-2 coding by means of film unsteadiness correction", Proc. SPIE 2952, Digital Compression Technologies and Systems for Video Communications, (16 September 1996); https://doi.org/10.1117/12.251316

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