Transcript Quality of Experience (QoE)

Can 4G video quality
be trusted?
Joe Mele
VP, Dialogic® Media Labs
September, 2009
Dialogic® Media Labs
• Video “center of excellence”
inside Dialogic
• World-class team of video
technologists
• Advanced video capabilities
for Dialogic products
• Research in video analytics
Takeaways from Miami
Video in 3G networks: Today
• Most solutions are for streaming content from storage
servers
• TDM pipes constrain bandwidth required for advanced
video services
• Mobile video in 3G-324M environments is limited to
speeds of 40 Kbps
• EV-DO (Rev A) can typically provide download speeds up
to 1 Mbps and upload speeds up to 400 Kbps
Video in 4G networks: Tomorrow
4G to unleash advanced video services and applications
• Bigger pipes
– 100 Mbps speeds in mobile environments
– 1 Gbps speeds in fixed environments
• Plus…designed for:
In tomorrow’s 4G world…
• Video becomes the de facto means for IP
communications
– Replacing voice (phone call, voice mail)
– Replacing data (email, text messaging)
– Interactive multimedia
– All-IP
– Video Friendly…
Video is the New Voice™
1. 4G will unleash advanced video applications
2. Video becomes the new voice
3. Content must be trusted
Can 4G video quality be trusted?
• Bigger pipes help, but problems remain:
– Bandwidth fluctuations
– Compression errors
• The higher the compression rate, the higher the
impact of each lost bit
• Transcoding only makes things worse
What’s needed?
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Today’s network monitoring approaches are also inadequate…
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Packet loss, Jitter, Delay...
Carriers measure network parameters (Service Assurance)
Quality of Service (QoS)
Not as simple as lost bits…but it’s where the bits reside in a frame
Visual effect of packet loss can range from zero to disastrous
More advanced parameters are required
– Need to analyze the video content
– What the viewer perceives…not the network
– Quality of Experience (QoE)
What’s being measured?
Quality of Service
• Delay
• Jitter
• Packet loss
Quality of Experience
• Blackout
• Blurring
• Freeze
• Macro-blocking
• Noise
• Sync
Monitoring Video QoE: Demonstration
Note: Score represents average of the past 30 frames
Use Case Example
*
QoE monitoring point
Takeaways
1. Video quality will still be an issue in
the 4G world
2. Today’s approaches for measuring
video quality are insufficient
3. A different model is required… video
quality of experience
Thank You!
Joe Mele
VP, Dialogic® Media Labs
[email protected]