In the name of GOD Telemedicine Nazanin Makkinejad Raziye Salarifard Spring 2011

Abstract

Outline Introduction System Architecture Implementatio n challenges and solutions Future works Conclusion

Outline Introduction System Architecture Implementation challenges and solutions Future works Conclusion

Introduction

Motivation Reducing costs Removing the necessity of traveling a long distance

Implementation Challenges Infrastructure planning and developmentSystem design and architectureSecurity and authenticityInternet reliabilitySpeed of communication

Models for telemedicine systems Quality attributes model Real-time telemedicine system Multimedia telemedicine system (MTS)

Outline Introduction System Architecture Implementation challenges and solutions Future works Conclusion

The video conferencing system architecture

Functionalities Remote monitoringDifferent users’ access

IP cameras

Having a built-in access server which receives the clients’ requests Broadcastin g the videos streams to the requesting clients

Why IP cameras? The real-time response of the cameras The availability of software development kit (SDK) The support of different protocols The maximum resolution of the cameras

The best way to build a video conferencing system SDK Audio and Video encoder/decoder The web page plug-ins The media player

The structure of video conferencing system A client-server architecture The client accesses the web server and joins the conference

How can we achieve this functionality? ActiveX Componen t Encoding the audio signal ActiveX Component Encoding and broadcasting video signal ActiveX Component Media player

A snapshot of client web based interface

Outline Introduction System Architecture Implementation challenges and solutions Future works Conclusion

Implementation challenges and solutions Challenges: play – out latency Failure in Serving Multiple Synchronized Requests Synchronizing Multiple Video Streams

play – out latency

play – out latency solution cameras that have their own proprietary media player 50sec ………3sec

Failure in Serving Multiple Synchronized Requests

Failure in Serving Multiple Synchronized Requests solution media player for the zoomed view of the IP camera and the media players of the webcam media player for the IP cameras HTML frame

Synchronizing Multiple Video Streams slight time lag maybe noticed between the play-out of different cameras that is monitoring the same event This phenomenon becomes more apparent when the client uses an on demand video server to view an off-line operation.

Synchronizing Multiple Video Streams solution

Outline Introduction System Architecture Implementation challenges and solutions Future works Conclusion

Future works implementing this system over the Internet real-telemedicine archiving and recording capability for the conferences

Outline Introduction System Architecture Implementation challenges and solutions Future works Conclusion

telemedicine video conferencing system technical issues encountered during the implementation

Reference [1] R. Bashshur, J. Sanders, and G. Shannon, Telemedicine Theory and Practice, Springfield, IL, Charles C. Thomas, 1997, ch 1. [2] Hofmann, B.,“Theory and Applications of Telemedicine”. J Medical Systems, Vol. 26, pp , [3] P. J. Klutke, P. Mattioli, F. Baruffaldi, A. Toni, and K. H. Englmeier, “The telemedicine Benchmark--A general tool to measure and compare the performance of video conferencing equipment in the telemedicine area”. Computer Methods and Programs in Biomedicine. 60(2), pp , [4] C. LeRouge, M. Garfield, and A. Hevner, "Quality Attributes in Telemedicine Video Conferencing" Proceedings of the 35th Annual Hawaii International Conference on System Sciences, Hawaii, January 2002, pp [5] H. Yun, S.Yoo, D.Kim, S.Kim, "Performance Evaluation of Telemedicine System based on Multicasting over Heterogeneous Network", IEEE Engineering Conference in Medicine and Biology, Shanghai-China, September, 2005, pp [6] L.Ling, Y.Dezhong, L.Jianqing, L.Bin, W.Ling, "A multimedia telemedicine system", IEEE Engineering Conference in Medicine and Biology, Shanghai-China. September, 2005, [7] “Axis Network Cameras” [Online]. Available: [Accessed: June 22, 2009]. [8] “LEADTOOLS Video Streaming Module” [Online]. Available: [Accessed: June 22, 2009]. [9] “Video Broadcast SDK ActiveX v2.0” [Online]. Available: [Accessed: June 22, 2009]. [10]”Microsoft Windows Media Player” [Online]. Available: [Accessed: June 22, 2009].

Thank you