This document outlines the design and implementation of a video streaming application called RealStreamer for slow-speed networks. It discusses the goals of creating software to stream multimedia over slow links, reducing the digital divide. It describes the research methodology, including analyzing existing systems and user needs. A new rate adaptive scheme called OVSM is presented and analyzed through simulations. RealStreamer was prototyped with an encoder, server, and decoder. Current issues with performance and usability are noted. The team and funding sources are acknowledged.
Mihai Bizoi: "Three FP7 projects at University of Valahia: PROFILES, IRRESIST...ifi8106tlu
Mihai Bizoi:
"Three FP7 projects at University of Valahia: PROFILES http://www.profiles-project.eu ; IRRESISTIBLE http://www.irresistible-project.eu ; ENGAGE http://www.engagingscience.eu "
Mihai Bizoi: "Three FP7 projects at University of Valahia: PROFILES, IRRESIST...ifi8106tlu
Mihai Bizoi:
"Three FP7 projects at University of Valahia: PROFILES http://www.profiles-project.eu ; IRRESISTIBLE http://www.irresistible-project.eu ; ENGAGE http://www.engagingscience.eu "
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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
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)
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
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.
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
