Amir Zmora’s Presentation at eComm 2009
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Amir Zmora’s Presentation at eComm 2009

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IP Video Communications Issues and Solutions

IP Video Communications Issues and Solutions

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    Amir Zmora’s Presentation at eComm 2009 Amir Zmora’s Presentation at eComm 2009 Presentation Transcript

    •  
    • IP Video Communication Issues & Solutions
      • Amir Zmora, RADVISION
    • State of IP Video Communication
    • From Picturephone to Telepresence
    • This is Telepresence
      • Matt Harding dancing over Telepresence @ Yahoo headquarters
    • Evolution of Video Standards
    • H.26x Lifecycle Status H.264 H.263 H.261
    • Who is to Blame?
      • The network
      • Bandwidth
      • Packet Loss
      • Burstiness
    • Packet Loss
    • Packet Loss Random Noise Artifacts
    • Insufficient Bandwidth Trails
    • High Compression Rate Blockiness Effect
    • Advanced Video Coding Technologies Focus on Quality of Experience
    • P-Frame Dependency Result – Packet loss has dramatic effect on quality of experience 1 2 3 4 5
    • Multi Description Coding
      • Splitting one source of information to multiple entities
      • Each decodable
      • The more the merrier – Quality
      • Example – splitting of PCM stream
    • Scaled Video Coding (SVC)
      • Uses MDC concept
      • H.264 Annex G
      • Spatial - Change of frame size (resolution)
      • Temporal - Change of frame rate
      • Fidelity / SNR - Change of quality
      • Object - Selection of “Region of interest”
    • Spatial Scalability
    • Temporal Scalability
      • Hierarchal P Structure
    • Signaling layered decoding dependency 96 97 98 99 100 101 OR OR AND L1 L2 L3
    • Error Resilience – Protecting only what Matters
      • Forward Error Correction
      • Retransmission
      • Video Fast Update
    • Error Resilience MDC: Hierarchical P-Structure
    • Putting it All Together
    •