在資訊發達的現代，各種電腦、智慧型手機和平板等產品琳瑯滿目，其提供了各式各樣多元化的功能，但相對的使用與操作起來也變得較為複雜，每一種功能皆會對應其操作步驟，對於銀髮族的長輩來說，想要使用電腦，需要去記憶或學習其各種操作，如果步驟複雜的話，無疑是增加銀髮族長輩們對電腦相關產品望之卻步的原因之一。
本論文之研究目的是針對銀髮族長輩發展一套具視訊通訊功能的多媒體系統。結合現在政府推行的數位電視，最後在設計成以簡單為目的的系統，讓銀髮族的使用者們不用改變現有的習慣或者額外的學習就能輕易的使用。
此系統中整合開放原始碼的Linphone視訊通訊軟體、YouTube網頁瀏覽器、實作一個基於Gstreamer函式庫的影片播放器以及透過Wi-Fi可分享記錄生活點滴的照片。利用簡單的操作，讓銀髮族長輩可以方便地進行家庭娛樂或與家人互動。
此系統實作於ARM架構的TI Pandaboard平台上，提供了智慧型手機或無線鍵盤滑鼠兩種模式來操控此多媒體系統，使用者可以安裝本系統提供的app在Android智慧型手機，使用手機來操作此多媒體系統所提供的全部功能。研究成果以影片呈現在YouTube: http://youtu.be/nJwmMbl8i3U

In the information age, various computers, smart phones and tablet computers provide diversified functions, each function has its own operating procedures, and it has become more complicated to use the computer for senior citizens. It is one of the reasons why senior citizens are unwilling to use the electronic products.
The purpose of this thesis is to develop a multimedia system with video communication for the senior citizens. The thesis designs a simple system with the digital TV that government try to carry out. The senior citizens would not have to change existing habits or learn additional operations to easily use the system.
The system integrates the Linphone video communication software, web browser video player based on the Gstreamer library and life photographs share. Through a simple interface operation, the senior citizens can comfortably watch movies or interact with their families in a digital way without much difficulty.
The system is implemented on the ARM-based TI Pandaboard platform. The system provides remote control methods through smart phone or Bluetooth wireless keyboard and mouse. Users can install the application on the smart phone as a remote control to operate all functions of the system. The demonstration can be seen in the video at onYouTube: http://youtu.be/nJwmMbl8i3U

摘要 v
ABSTRACT vi
LIST OF FIGURES ix
LIST OF TABLES x
I. INTRODUCTION 1
1.1 Motivation 1
1.2 Objective 3
1.3 Organization of thesis 4
II. BACKGROUND 5
2.1 System Environment and Development Tools 5
2.1.1 System Environment 5
2.1.2 Development tools 7
2.2 Communication 8
2.2.1 Communication Software 8
2.2.2 Wireless Communication Technology 11
2.3 Related Products 14
III. SYSTEM ANALYSIS AND DESIGN 17
3.1 System Analysis 17
3.1.1 5W1H 17
3.1.2 Functional and Non-functional Requirements 20
3.1.3 Use Case Analysis 22
3.1.4 Analysis Model 29
3.1.5 SWOT analysis 34
3.2 System Architecture 35
3.3 System Design 36
3.3.1 Class Diagram 36
3.3.2 State Machine Diagram 38
3.4 Hardware architecture 42
3.4.1 Pandaboard development platform 43
3.4.2 Android smart phone 46
3.5 Software Architecture 47
3.5.1 Communication software ─ Linphone 48
3.5.2 Video Player 50
3.5.3 YouTube Video Streaming 51
3.5.4 Image Share 53
3.5.5 Remote Control 55
IV. IMPLEMENTATION 57
4.1 TI Pandaboard platform setup 57
4.2 Porting video communication software 59
4.3 Installing Gstreamer library 62
4.4 Porting Bluetooth library 63
4.5 Creating the APK 65
4.6 Implementation Results 68
4.6.1 Multimedia system 68
4.6.2 Remote Control 72
V. CONCLUSIONS AND FUTURE WORK 77
5.1 Conclusions 77
5.2 Future work 77
REFERENCES 80
APPENDIX 83
VITA 96

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