Amir Zmora’s Presentation at eComm 2009

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

Amir Zmora’s Presentation at eComm 2009

by eCommConf on Mar 05, 2009

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Amir Zmora’s Presentation at eComm 2009 — Presentation Transcript

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