Silence is golden the effects of silence deletion on the cpu load of an audio conference.pdf

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Silence is golden the effects of silence deletion on the cpu load of an audio conference.pdf

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Silence is golden the effects of silence deletion on the cpu load of an audio conference

Silence Is Golden? - The Effects of Silence Deletion on the CPU Load of an Audio ConferenceJuly 7, 1993 1 Silence Is Golden? - The Effects of Silence Deletion on the CPU Load of an Audio Conference Mark Claypool John Riedl Presented for satisfaction of the plan B master’s project requirement. June 30, 1993 Department of Computer Science University of Minnesota Abstract This paper presents a study of CPU performance of audio conferences on packet- switched networks using silence deletion. We present a model for measuring audioconfer- ence load, perform micro-experiments measure the CPU load of the audioconference com- ponents, perform macro-experiments to test predications based on the micro-experiments, and predict the performance of audioconferences under future technological advances. We find silence deletion reduces the CPU load for audio-conferences with three or more people. Under many future technological advances, silence deletion will continue to bene- fit audioconferences, although the benefits may not be as significant. May 3, 1994 2 1.0 Introduction3 1.1 Audio Applications 3 1.2 Multimedia on Packet-Switched Network3 1.3 Effects of Silence Deletion 3 1.4 Summary of Coming Sections 3 2.0 Related Work 4 2.1 Audioconference Experiments4 2.2 Measuring CPU load4 2.3 Analyzing UDP4 2.4 Using Silence Deletion 5 2.5 Our Contributions 5 3.0 Model 6 3.1 The Model6 3.2 Silence Deletion6 3.2.1 Absolute7 3.2.2 Differential 9 3.2.3 Exponential10 3.2.4 HAM10 3.3 The Hypothesis 12 4.0 Micro Experiments 13 4.1 Design 13 4.1.1 Measurement Components 13 4.1.2 Data Collection15 4.2 Results18 5.0 Macro-Experiments 25 5.1 Design 25 5.2 Results25 6.0 Analysis 26 6.1 Introduction26 6.2 Increasing Participants26 6.3 Increasing Silence 28 6.4 Improving Technology29 6.4.1 Faster CPU 29 6.4.2 Faster Audio Device29 6.4.3 Improving Silence Deletion31 7.0 Conclusions34 8.0 Future Work 35 9.0 Acknowledgments 36 10.0 References37 11.0 Appendix A39 12.0 Appendix B 41