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Voice and Video over IP Communications: Assessing and Improving User Experience
 

Voice and Video over IP Communications: Assessing and Improving User Experience

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While video deployment over IP is experiencing a significant boom, overall user experience does not always live up to expectations. RADVISION experts will discuss unique, no-reference, video ...

While video deployment over IP is experiencing a significant boom, overall user experience does not always live up to expectations. RADVISION experts will discuss unique, no-reference, video measurement and analysis algorithms that improve user experience for voice and video over IP communications.

By attending this webinar, you will learn:
* Factors that can affects Video Quality
* Different methodology to measure Video Quality
* RADVISION solutions for Video Quality

Who should attend: professionals in visual communication field
* IT managers
* System architects
* Product Managers
* CTOs
* VP R&D
* Telecom operators representatives

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    Voice and Video over IP Communications: Assessing and Improving User Experience Voice and Video over IP Communications: Assessing and Improving User Experience Presentation Transcript

    • Assessing and Improving User Experience Voice and Video over IP Communications
      June 17th, 2010
      Eli Cohen
      Director of Product Management
      Head of Testing tools
      elic@radvision.com
      Anatoli Levine
      President, IMTC
      Director of Product
      Management – Americas
      RADVISION
      alevine@radvision.com
      Carl Ford
      Community Developer,
      4GWE
      Crossfire Media
      carl@crossfiremedia.com
      Tamar Barzuza
      Senior Algorithm
      Researcher
      1
    • Agenda
      IP Video Market
      Video Quality Challenges
      Video Quality innovative research & Standards
      Video Quality Measurement Methodologies
      Video Quality Full-Reference
      Video Quality Online and Real-time Measurement
      RADVISION’s Video Quality Solution
      Q&A
    • Speakers
      Eli Cohen is Director of Product Management at RADVISION.
      For the last 11 years, Eli has created and managed innovative testing systems for VoIP and 3G, including Video Quality measurement.
      Tamar Barzuza is Senior Algorithm Researcher at RADVISION.
      For the past 10 years, Tamar has worked on various projects at RADVISION, including 3D presence and innovative Video Quality measurement.
      Anatoli Levine President, IMTC and Director of Product Management – Americas at RADVISION
      For the last 12 years, Anatoli has helped RADVISION customers deploy RADVISION technology to the greatest benefit. During the same period, Anatoli has promoted interoperability in the global multimedia communications industry in various capacities at the IMTC.
    • An established company that has set the pace for visual communications since 1992, RADVISION is the leading provider of core technologies, products and solutions that enable unified visual communications over IP, 3G and emerging next-generation IMS networks.
    • Video is Everywhere!
      Video Conferencing & Telepresence
      IM &Video Messengers
      Social Networking Sites
      Video Conferencing ASPs
      IP Video Surveillance
      Video Web Collaboration
      Video Streaming
      Video Mobile
    • IP Video – Trend Setters
      Video is widely accepted and demanded, thanks to:
      Skype (34% of all calls: video) and the like
      YouTube and the like
      Social networks (video sharing made simple)
      Desktop video conferencing – widely available
      IPTV implementations
      iPhone 4 – up and coming, will spark new interest
      As adaptations grow, quality becomes
      even more important!
    • IP Video – Additional Influential Factors
      HD Video
      Practical scalable video coding
      4G (pure IP) mobile networks
      Dedicated and super-powerful DSPs and CPUs
    • IP Video in Numbers – growing, growing, growing
      The expected Internet traffic volume for video calling in 2015 is 400,000,000 TB (source: discovery.org)
      The expected Internet volume of Internet video, virtual worlds and gaming in 2015 is 200,000,000 TB
      The market for IPTV video services will reach $26.3 billion in 2011, not including advertising and value-added TV services, according to iSuppli.
    • Video Conferencing Market StatisticsENTERPRISE VIDEO CONFERENCING SYSTEMS UNITS SHIPPED
    • Video Conferencing Market Statistics
      39%
      68%
      Large Enterprise Video Conferencing: Y2008 Revenues $1.5B
      Large Enterprise Video Conferencing: Y2012 Revenues $1.7B
      5%
      23%
      33%
      7%
      Multi Codec TP
      Conf Rooms
      Executive
      Personal Video
      17%
      8%
    • Video Conferencing Market StatisticsENTERPRISE PERSONAL VIDEOCONFERENCING SYSTEMS UNITS SHIPPED
    • Video Quality Measurement Methods
    • The Importance of Video Quality
      Increased user satisfaction
      The visual sense is extremely important
      Video services are becoming a popular mode of
      communication at reasonable prices
    • Factors that Affect Video Quality
      Network conditions
      Source of the video
      Compression level
      Image complexity
      Content type
      Network
      Parameters
      Content
      Parameters
      Video
      Parameters
      Image
      Parameters
      Content
      Type
    • How Video Differs From Voice
      Video compression is complex and handles much more information
      More parameters to configure:
      Network
      Codec
      Content type
      Video HD can use up to 16 Mbs (audio is up to 64Kbs)
    • Video Quality Score Challenges
      Can Video Quality be measured?
      Manually
      Automatically
      If so, how do we measure it?
      Online or offline?
    • MOS
      Mean Opinion Score (MOS):
      The arithmetic mean of all individual observations, ranging from 1 to 5.
      MOS Quality Impairment: 5 Excellent: 4 Good: 3 Fair: 2 Poor: 1 Bad
      Good
      Fair
      Poor
      Bad
    • Video Quality Measurement Methodologies
      “Full-Reference”Offline
      “No Reference”
      Real-time
      Video Quality
    • Video Quality Innovative Research
    • RADVISION’s Video Quality (VQ)
      • 17 years of experience in Video Conf
      • Leading Video Over IP Core technology
      • Compliant with leading standards
      • Plays a vital role in standardization
      • RADVISION’s IPR
      • Proprietary advanced VQ technology
      • VQ cause analysis and optimization
      • Human vision database
      • Unique synchronization algorithm
      • Video Quality - innovative and unique research
      • VQ databases and data analysis
      • VQ assessment techniques
      • VQ formulas and coefficients
      • Stream analysis and synchronization
      • Jointresearch with academia
      • Image processing
      • Packet loss analysis
      • VQ No-Reference algorithms
    • RADVISION’s Human Vision Database
      Video Quality Surveys
      Unprecedented in scope (x1000 inputs)
      Variable contents: video conferences, streaming, motion pictures…
      Variable artifacts: blockiness, packet loss, blurriness…
      Worldwide, different viewing preferences
      Guarantees high correlation with Human Perception
      Database enhanced with state-of-the-art RV Full-Reference algorithms
    • RADVISION’s Packet Loss Detector
      Video packet loss concealment detection based on image content
      Innovative research presented at the 16th European Signal Processing Conference (EUSIPCO2008)
      Over 90% detection precision
    • RADVISION’s Packet Loss Propagation Analysis
      Advanced techniques for packet loss propagation analysis, based on:
      Refresh rate – Intra frame or Intra macro blocks
      Packet loss percentage
      Packet loss patterns
      Standard VMOS: 2.4
      RV VMOS: 2.4
      Standard VMOS: 4.4
      RV VMOS: 2.4
      Standard VMOS: 4.4
      RV VMOS: 4.4
      Figure A: No Packet loss
      Figure B: Packet loss
      Figure C: Propagation of Packet loss
    • RADVISION’s Synchronization Algorithm
      Unique algorithm to synchronize original  degraded
      Different frame rates
      Resizing
      Partial picture
      Picture in picture
      Compression artifacts
      Black period
      Welcome frames
      Logo additions
      Title additions
      25
    • RADVISION’s Content-Based VQ
      Compression: tradeoff between motion and sharpness
      Quality of Experience depends on video content
      VQ algorithms take different types of content into consideration
    • Video Quality Algorithms
    • Video Quality, Full-Reference
      “Full-Reference”
      Full-Reference allows you to perform a Video Quality analysis and compare the degraded video sequence to the original one
      Synchronize original and degraded streams
      Video Quality algorithm based on frame analysis
      Partial picture analysis
    • Video Quality, Full-Reference Metrics
      “Full-Reference”
      Blurriness
      PSNR, MSE
      Blockiness, Blurriness
      Freeze, Frame Loss
      Jitter, Delay, Packet Loss

      Blockiness
      Noise
    • Video Quality No-Reference Standard
      “No Reference”
      ITU G.1070 video quality estimation
      Real-time
      Automatic
      Based on:
      Network
      Codec parameters
      ITU-R BT.500-9. Subjective Video Quality assessment
      Good
      Fair
      Poor
      Bad
    • Advanced Online Video Quality
      “No Reference”
      Additional techniques for performing global video quality estimation, based on:
      Packet loss affectation and propagation
      Quality score based on the dynamism level of the video and compression
      Bit-rate and frame-rate fluctuation considered as indication of quality
      Reason for Video Quality degradation, as well as optimization methods
    • Accuracy
      Our algorithm accuracy is compared to our subjective and objective databases.
      Cross correlation factor of more than 90%. And these results are constantly improving with development and progress.

      ITU . Standard

      RV Advanced techniques
    • RADVISION Video Quality
      Solutions
    • RADVISION Video Quality Solution
      OEM
      VQ SDK is a building block for the development of a wide range of video applications
      ProLab
      R&D and QA-Labs
      SIP, IMS, 3G, H.323 complete testing solutions
      Enterprise &
      Service Provider
      Active Monitoring (H.323 & SIP)
      Voice & Video analysis and measurement (Passive)
    • RADVISION’s VQ SDK:
      The RADVISION VQ Online Toolkit is a building block for the development of a wide range of video applications, to:
      Measure Video Quality in real-time
      Perform Cause Analysis
      Offer quality improvement options
    • Video Quality Passive Monitoring - Features
    • Active Monitoring
      eVident ensures:
      Network readiness for Voice and Video over IP
      Improved/Ensured end-user experience
      Correct network configuration
      Topology emulation, including interaction with various types of infrastructures
      Distributed solution
      Fault protection and preventing problems via proactive testing
      Application & protocol testing using SIP and H.323
    • ProLab - IMS, 3G and VoIP Testing Architecture
      SIP
      IMS
      324M
      H.323
      Terminal
      Server
      Media
      Emulation
      Media Quality
      Automation
      • SIP
      • H.323
      • IMS
      • 3G-324M
      • SIP Server
      • IMS Server
      • Gatekeeper
      • Media emulation
      • Network Impairment
      • Media Viewer
      • Audio & Video Playback
      • Audio MOS Ref-based (PESQ)
      • Audio MOSNo-reference
      • Video MOSFull-reference
      • Video MOS No-reference,Passive
      • XML/API
      • Test Scheduler
      • Test ResultAnalysis
      • Built-in script
    • ProLab
      Thank You!
      Eli Cohen
      http://blog.radvision.com/
      www.radvision.com
      elic@radvision.com | +972-3-7679631