In the name of GOD

Telemedicine

Nazanin Makkinejad

Raziye Salarifard

Spring 2011

Abstract

Outline

Introduction

System Architecture

Implementation 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 ChallengesSystem design and architecture

Security and authenticity

Internet reliability

Speed 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 monitoring

Different users’ access

IP cameras

IP cameras

Having a built-in access server which receives the clients’ requests

Broadcasting 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 Component • 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

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

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

Conclusion

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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. 199-220, 2002.

• [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.133-141, 1999. • [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. 2050-2059. • [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. 2175-2177.

• [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, 3746-3748.

• [7] “Axis Network Cameras” [Online]. Available: http://www.axis.com/products/video/camera/productguide.htm. [Accessed: June 22, 2009].

• [8] “LEADTOOLS Video Streaming Module” [Online]. Available: • http://leadtools.com/SDK/Multimedia/video-ondemand-sdk.htm. [Accessed: June 22, 2009]. • [9] “Video Broadcast SDK ActiveX v2.0” [Online]. Available:

http://www.viscomsoft.com/products/videobroadcast/index.html. [Accessed: June 22, 2009]. • [10]”Microsoft Windows Media Player” [Online]. Available:

http://www.microsoft.com/windows/windowsmedia/default.mspx. [Accessed: June 22, 2009].

Thank you