CPET 581 Multimedia Networking Applications Introduction

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CPET 581 Multimedia Networking ApplicationsIntro
duction
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Introduction

• Syllabus
• Topics covered in this class

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Syllabus

• Course materials
• Fundamentals of Multimedia, by Ze-Nian Li and
  Mark S Drew
• Computer Network A Top-Down Approach, by James
  F. Kurose and Keith W. Ross
• Research papers

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Syllabus

• Grading
• Exams 30
• Homework and Lab Assignments 30
• Paper/Project/Presentation 30
• Class participation and discussion 10

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Multimedia Applications

• Convergence of data, voice and video over the
  Internet
• Multimedia transmission
• Download and play ftp, nonrealtime
• Play while downloading streaming multimedia,
  realtime
• Multimedia Streaming Applications
• Video on demand pre-recorded video
• Netflix - watch instantly
• pay-per-view
• Video conferencing live video streaming
• VoIP (skype)
• Yahoo messenger, Hotmail messenger
• IPTV, mobile TV
• Mobile video calling
• Questions
• How do you watch TV?
• How do you make a phone call?

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Multimedia Applications

• Multimedia Streaming Applications
• Youtube
• Apple quick time streaming
• Google video
• Streaming Video on Mobile phones

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Multimedia Applications

• Compressed multimedia
• E.g. , A video image of resolution 512 512
  pixels, each pixel uses 24 bits, played at 30
  frames per second,
• one second uncompressed video needs about 24 Mb
  storage
• Calculation
• Not efficient for storage and transmission

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Multimedia Applications

• Lossy and lossless compression to reduce bit
  rates
• Image and Video compression standard
• JPEG
• H.264/MPEG4
• Design goal
• High quality with low bit rates

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Quality of Service

• Quality of Service requirement
• Bandwidth
• Packet loss
• Delay and jitter
• Adaptive video streams
• Heterogeneous networks
• Network bandwidth
• Capacity of the devices

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How packet loss and delay affect the visual
quality of video?
Without packet loss
With packet loss
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Protocol

• Protocol
• UDP - unreliable
• TCP reliable, not efficient
• RTP (Real-time transport protocol)
• Socket programming to build a networking
  application

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How to provide QoS

• End to End transmission
• Network support
• InterServ
• DiffServ

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Network technology
Multicast group

• Unicast via Multicast

Unicast
Multicast
Clients
Clients
C
C
Server
Server
S
S
C
C
C
C
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Network technology

• Unicast or Multicast
• Content delivery network
• Client/Server or Peer-to-peer

Peer-to-Peer Network
Server based Network
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Network technology

• Peer-to-peer Network
• File transfer (BitTorrent)
• Voice-over-IP (Skype)
• Video streaming (PPlive)
• Video streaming over wireless and mobile network
• Wi-Fi
• WiMax
• Sensor network

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Multimedia Networking Techniques Covered

• at different layers of the network model
• application layer, transport layer and network
  layer
• With different network architectures,
• client-server and peer-to-peer
• at different locations of the network
• end host, proxy server and network router
• at different sides of an end-to-end application
• the client side and the server side
• at different communication networks,
• wired networks, and wireless and mobile networks
• with different transmission schemes
• unicast, multicast and broadcast