Distributed multimedia: user perception and dynamic QoS

Ronnie T. Apteker; James A. Fisher; Valentin Kisimov; Hanoch Neishlos

doi:10.1117/12.171702

1 April 1994 Distributed multimedia: user perception and dynamic QoS

Ronnie T. Apteker, James A. Fisher, Valentin Kisimov, Hanoch Neishlos

Proceedings Volume 2188, High-Speed Networking and Multimedia Computing; (1994) https://doi.org/10.1117/12.171702
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

Abstract

Dynamic Q_oS yields better network utilization by deliberately degrading the quality of existing continuous media connections so that new user requests can be accommodated. This distributed multimedia approach involves dynamically controlling multimedia parameters such as color depth, frame rate and audio sampling rate. It is obvious that a degradation of the physical characteristics of a real-time service will result in perceived differences in video acceptability. But not so obvious is the relationship between video message importance and video degradation. Through experiments it is possible to gain insight as to what type of distributed video applications will be more susceptible to a degradation in the Q_oS. This paper examines the effects that dropping the frame rate of a video window has on user perception. Findings support the fundamental premise that frame rate reduction itself leads to progressively lower ratings of acceptance, which erodes with each stepwise decrease in the experimental frame rates. We describe the results in terms of network bandwidth and distributed video applications. Dynamic Q_oS is by no means an intermediate step in the realization of unconstrained multimedia on-demand services. Adaptive algorithms will continually be required since there is no upper bound on the complexity of user requirements.

Citation Download Citation

Ronnie T. Apteker, James A. Fisher, Valentin Kisimov, and Hanoch Neishlos "Distributed multimedia: user perception and dynamic QoS", Proc. SPIE 2188, High-Speed Networking and Multimedia Computing, (1 April 1994); https://doi.org/10.1117/12.171702

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