2015 04-15 research seminar

1. DESIGN AND IMPLEMENTATION OF VIDEO
STREAMINGAPPLICATION FOR SLOW-
SPEED LINK - REALSTREAMER
Dr. Ayodeji O. Oluwatope
Lead, Network Utilisation Maximisation Sub-Group
Comnet Lab, Department of Computer Science and Engineering
Obafemi Awolowo University, Ile-Ife
url: comnet.oauife.edu.ng
aoluwato@oauife.edu.ng

2. Presentation Agenda
• Introduction - Project Goal, Project Benefits
• Research Methodology
• OVSM – Rate Adaptive Scheme
• OVSM Analysis
• Simulation Results & Discussions
• Implementation
• Conclusion
• References

3. Introduction
• Information theory (Shannon,1948)
• Rate, R < Capacity, C - desireable
• Rate, R ≥ Capacity, C - undesireable
• What is a slow-speed link?
• Uplink (< 1Mbps) / download rate ( <4Mbps)
• What is a rate adaptive system?
• high speed and slow speed difference compensator

4. Introduction contd
• Unbearable per-unit cost of Internet bandwidth
• Low level of internet users utilisation
• Classroom over population

5. Project Goals
• create pluggable software(s) capable of streaming
multimedia traffics across slow-speed networks
• contribute to local contents development in the area of
appropriate software engineering
• provide research opportunities for Masters and
Doctorates Theses,
• produce high quality publications in reputable journals,
and produce products patents

6. Project Benefits
• creation of an appropriate software technology to reduce
Internet speed mis-match effect
• eradication of the digital divide currently subsisting between the
upper and the lower class of the society
• increase deployment rate of value-added services via Internet
such as telemedicine, e-learning, video surveillance etc.
• contribute to the strategic goal of Obafemi Awolowo University (OAU),
Ile-Ife Science and Technology Park in the spinning-off SMEs
• improve on Nigerian Universities’ relevance to addressing our socio-
economic challenges

7. Research Methodology
• Approaches
• Analysis, empirical & prototyping
• Problem analysis phase
• critical factors responsible for large end-to-end delay in slow-speed networks
were investigated,
• existing video streaming systems auditing, stakeholders needs analysis,
industry standard and regulations gathering and harmonisation and
requirement validation.

8. Research Methodoloy contd
• Modelling phase
• End-to-end video frame scheduling scheme was developed and
analysed for performance using Matlab
• Further performance analysis was carried out at packet-level using a
discrete-event simulator (NS3).
• average packet delay, packet-loss rate, bit error rate, BER, throughput, & jitter
in a hypothetical slow-speed network.
• Prototyping phase
• Application design and prototyping using object-oriented design
approach and Java technology respectively.

9. OVSM- New Rate Adaptive Scheme
(Olayiwola and oluwatope ,2014)

10. OVSM Stead-State Analysis
• Queue Q1 modelling
• M/D/1/K (olayiwaola et al., 2013)
• Queue Q2 modelling
• D/D/1/K (olayiwaola et al., 2013)

11. Simulations Results from Matlab
olayiwaola et al., 2013)

12. Simulations Results from Matlab -contd
olayiwaola et al., 2013)

13. Simulations Results from ns3
Olayiwola and oluwatope, 2014

14. Realstreamer - Encoder

15. Realstreamer –Encoder
• Images Capturing is achieved using Sarxos WebCap
Capture (http://webcam-capture.sarxos.pl)
• Java Audio was use in capturing audio data
• The opening and reading of media file are achieved using
Xuggle API(www.xuggle.com).

16. Realstreamer –Encoder contd
• The Encoder is design in such a way to handle both
prerecorder media and real time captured data.
• Both Audio and Video producers are interfaced to a buffer
to handle race condition and thread related issues.
• Connections to the server are managed by
EncoderStream Agent implemented with nettyio

17. Realstreamer – Server

18. Realstreamer –Decoder

19. Realstreamer –Decoder
• Decoder – The decoder gets data from the server
transmits log data to the server, update image decoder
and audio decoder.
• Image decoder gets the image, decodes it and updates
the UI.
• Audio decoder gets the audio and play out.

20. Sample UI Designs

21. Currents Issues
• Performance bugs – high packet delay and packet loss
rate
• Software usability, user-friendliness etc

22. Conclusion
• Optimised video streaming model (OVSM) for multimedia
traffic formulated, modelled, and analysed
• OVSM is being adjusted for implementation
• Realstreamer architecturing has been achieved
• Realstreamer implementation is being perfected – OSS
• OVSM software real-life testing has commenced

23. Team Members
• Researchers
• Dr. A. O. Oluwatope - Computer Science, OAU
• Professor E. R. Adagunodo -Computer Science, OAU
• Professor G. A. Adarounmu - Computer Science, OAU
• Dr. Yinka Adesina – Mathematics, OAU
• Dr. Ishaya Tanko - Computer Science, UH
• Research Assistants
• Miss O. E. Olayiwola – Doctoral student
• Mr D. Oyewo - Doctoral student
• Technical Assistant
• Mr Azeez Isau - Bachealor Student
• Grants
• TetFund Intervention Project (2013-2014)
• OAU counterpart funding

24. References
• A.O. Oluwatope, D. T. Oyewo, F. E. Olayiwola, G. A. Aderounmu, and E.R.
Adagunodo (2013) Buffer Occupancy of Double-Buffer Traffic Shaper in
Real-Time Multimedia Applications Across Slow-Speed Links. To Appear in
Communications and Network, Scientific Research Publishing, Inc. USA Vol
5 Issue 1
• Oluwafolake Olayiwola, Damilola Oyewo, Ayodeji Oluwatope, Adesola
Aderounmu and Rotimi Adagundo. (2012). Double-Buffer Traffic Shaper
Modelling For Multimedia Applications in Slow Speed Network. Journal of
Issues in Informing Science and Information Technology, USA 9: 361-368.
• Oluwafolake Olayiwola and Ayodeji Oluwatope (2014).Packet-level
Simulation of Real-Time Video in Slow-Speed Environment using NS-3.
To Appear in IASTED Proceeding of Modelling and Simulation. 1-3
September 2014, Gaborone, Botswana

25. •Thank you for listening