Usefulness of statistical multiplexing

Alexander Schertz

doi:10.1117/12.371211

22 November 1999 Usefulness of statistical multiplexing

Alexander Schertz

Proceedings Volume 3845, Multimedia Systems and Applications II; (1999) https://doi.org/10.1117/12.371211
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

The effectiveness of statistical multiplexing was investigated in two ways. One the one hand, two-channel tests facilitated detailed statements about the mechanisms of statistical multiplexing. Based on a simple concept of criticality for MPEG-2 coding, good agreement with theoretical expectations was found only for combinations of sequences which differed strongly in criticality. For these cases, a considerable increase in quality of the more critical sequence sand even an increase of the 'overall quality' (quality of sequences of both channels) was observed. On the other hand, the improvement of the picture quality was evaluated for multi-channel systems (4 and 8 channels). In a life demonstration at an international assembly, many experts could convince themselves of the advantage of this method. The results were also recorded and evaluated using a recently developed method of objective picture quality measurement which confirmed the subjective impression and led to quantitative statements. It became quite evident that peaks of impairment could be avoided by statistical multiplexing.

Citation Download Citation

Alexander Schertz "Usefulness of statistical multiplexing", Proc. SPIE 3845, Multimedia Systems and Applications II, (22 November 1999); https://doi.org/10.1117/12.371211

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