LYU0002 Wireless Cyber Campus

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LYU0002 Wireless Cyber Campus

• Supervisor Prof. LYU, Rung Tsong Michael
• Marker Prof. CAI, Leizhen
• Student Jang Kim Fung, Harvest
• Tang Ho Man, Sunny

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Presentation Outline

• Project Aim
• Introduction of WCC
• System Library
• Our Progress
• Problem
• Solution
• Conclusion Future Work

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1) Project Aim

• Develop a Wireless Cyber Campus (WCC)
• Provide an interactive way of communication for
  teacher and students
• Provide a virtual environment of learning
• Provide an alternative style of learning

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2) Introduction of WCC

• Traditional Campus
• In classroom
• Fixed size of class
• Fixed teaching schedule
• Face-to-face teaching

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2) Introduction of WCC

• Wireless Cyber Campus
• In a wireless network
• Unrestricted size of class
• Customized teaching schedule
• Teaching through video-conferencing and pre-saved
  video

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2) Introduction of WCC

• Teacher
• Delivery the lectures through the wireless
  network
• Answer the questions from students in real-time
• Have a channel for personal communication with
  students

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2) Introduction of WCC

• Students
• Learn without restriction on place and time
• Have personal scheduled lectures
• Have discussion through network

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3) System Library

• There are two main system libraries had used in
  our project
• DirectShow Library
• WinSock Library

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3) System Library - DirectShow

• The DirectShow Library
• Microsoft Windows API for playback media on the
  Microsoft Windows platform
• Provides for high-quality capture and playback of
  multimedia streams

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3) System Library - DirectShow
Filter Graph
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3) System Library - WinSock

• The WinSock Library
• Microsoft Windows API for network
  application-programming
• Provides functions for message transmission
  through network

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3) System Library - WinSock
API
Send
Receive
SPI
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4) Our Progress

• We have implemented part of the system
• Server
• Client
• Libraries had used
• DirectShow
• Winsock
• Microsoft Foundation Class (MFC)

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4) Our Progress

• Microsoft Foundation Class (MFC) Library provide
  
• data type
• pre-built function library

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4) Our Progress

• Server side
• Central control of the whole system
• Monitor server systems status
• Monitor clients activity
• Broadcast message to all the clients
• Forward the unicast message to destination client

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Snap Shots of server side
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4) Our Progress

• Client side
• Send messages to each others
• Create public or private chat rooms for
  discussion
• Record the lecture video for student reference
• View the saved video of lecture through our video
  player

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Snap Shots of client side (1)
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Snap Shots of client side (2)
Snapshot of Message
Snapshot of Chatroom
Snapshot of Chatroom information
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Snap Shots of client side (3)
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5) Problem

• Advantage of DirectShow
• high performance of video capturing
• support different video format for video
  playback
• Disadvantage of DirectShow
• no filter available for
• video capturing
• real-time transmission of the video across the
  network

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5) Problem

• Two filters need to be implemented
• 1st filter
• capture real-time video
• real-time compress the video
• transmit the video to server
• 2nd filter
• real-time receive the video from server
• render the video immediately
• video data should in memory

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5) Problem

• Difficulties of writing the filters
• Requires understanding of COM programming
• No example for network purpose
• Too few documentation
• Documentation is difficult to understand

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6) Solution

• Java Media Framework (JAVA JMF) support
• Capturing and storing media data
• Streaming applications
• Providing access to raw media data

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6) Solution

• JMF support Real-Time Transport Protocol (RTP)
• Streaming Media data
• Transmit captured or stored media streams across
  the network
• Receive RTP streams from the network

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7) Conclusion Future Work

• Successfully developed an application that can
  capture video, play video and provides chat-room
  for learning purpose
• Encounter problem in further develop our
  application
• Use Java and Java JMF as a solution

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7) Conclusion Future Work

• In the future we will try
• Video streaming
• One-to-one video conference
• One-to-many video conference

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Q A Section