Assessing and Improving User Experience Voice and Video over IP Communications <br />June 17th, 2010<br />Eli Cohen <br />...
Agenda<br />IP Video Market <br />Video Quality Challenges <br />Video Quality innovative research & Standards <br />Video...
Speakers <br />Eli Cohen is Director of Product Management at RADVISION. <br />For the last 11 years, Eli has created and ...
An established company that has set the pace for visual communications since 1992, RADVISION is the leading provider of co...
Video is Everywhere! <br />Video Conferencing & Telepresence <br />IM &Video Messengers<br />Social Networking Sites<br />...
IP Video – Trend Setters<br />Video is widely accepted and demanded, thanks to:<br />Skype (34% of all calls: video) and t...
IP Video – Additional Influential Factors <br />HD Video<br />Practical scalable video coding<br />4G (pure IP) mobile net...
IP Video in Numbers – growing, growing, growing <br />The expected Internet traffic volume for video calling in 2015 is 40...
Video Conferencing Market StatisticsENTERPRISE VIDEO CONFERENCING SYSTEMS UNITS SHIPPED<br />
Video Conferencing Market Statistics<br />39%<br />68%<br />Large Enterprise Video Conferencing: Y2008 Revenues $1.5B<br /...
Video Conferencing Market StatisticsENTERPRISE PERSONAL VIDEOCONFERENCING SYSTEMS UNITS SHIPPED<br />
Video Quality Measurement Methods<br />
The Importance of Video Quality <br />Increased user satisfaction<br />The visual sense is extremely important<br />Video ...
Factors that Affect Video Quality<br />Network conditions <br />Source of the video<br />Compression level<br />Image comp...
How Video Differs From Voice<br />Video compression is complex and handles much more information<br />More parameters to c...
Video Quality Score Challenges<br />Can Video Quality be measured?<br />Manually <br />Automatically  <br />If so, how do ...
MOS<br />Mean Opinion Score (MOS):<br />The arithmetic mean of all individual observations, ranging from 1 to 5.<br />MOS ...
Video Quality Measurement Methodologies<br />“Full-Reference”Offline <br />“No Reference”<br />Real-time <br />Video Quali...
Video Quality Innovative Research <br />
RADVISION’s Video Quality (VQ)<br /><ul><li>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</li></li></ul><li>RADVISION’s Human Vision Database<br />Video Quality Surveys<br />Unprecedent...
RADVISION’s Packet Loss Detector<br />Video packet loss concealment detection based on image content <br />Innovative rese...
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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 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

  1. 1. Assessing and Improving User Experience Voice and Video over IP Communications <br />June 17th, 2010<br />Eli Cohen <br />Director of Product Management<br />Head of Testing tools <br />elic@radvision.com<br />Anatoli Levine<br />President, IMTC<br />Director of Product <br />Management – Americas<br />RADVISION<br />alevine@radvision.com<br />Carl Ford<br />Community Developer,<br />4GWE<br />Crossfire Media <br />carl@crossfiremedia.com<br />Tamar Barzuza <br />Senior Algorithm<br /> Researcher<br />1<br />
  2. 2. Agenda<br />IP Video Market <br />Video Quality Challenges <br />Video Quality innovative research & Standards <br />Video Quality Measurement Methodologies<br />Video Quality Full-Reference <br />Video Quality Online and Real-time Measurement <br />RADVISION’s Video Quality Solution <br />Q&A <br />
  3. 3. Speakers <br />Eli Cohen is Director of Product Management at RADVISION. <br />For the last 11 years, Eli has created and managed innovative testing systems for VoIP and 3G, including Video Quality measurement. <br />Tamar Barzuza is Senior Algorithm Researcher at RADVISION. <br />For the past 10 years, Tamar has worked on various projects at RADVISION, including 3D presence and innovative Video Quality measurement. <br />Anatoli Levine President, IMTC and Director of Product Management – Americas at RADVISION<br />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.<br />
  4. 4. 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.<br />
  5. 5. Video is Everywhere! <br />Video Conferencing & Telepresence <br />IM &Video Messengers<br />Social Networking Sites<br />Video Conferencing ASPs<br />IP Video Surveillance<br />Video Web Collaboration <br />Video Streaming<br />Video Mobile <br />
  6. 6.
  7. 7. IP Video – Trend Setters<br />Video is widely accepted and demanded, thanks to:<br />Skype (34% of all calls: video) and the like<br />YouTube and the like<br />Social networks (video sharing made simple)<br />Desktop video conferencing – widely available<br />IPTV implementations<br />iPhone 4 – up and coming, will spark new interest<br />As adaptations grow, quality becomes <br /> even more important!<br />
  8. 8. IP Video – Additional Influential Factors <br />HD Video<br />Practical scalable video coding<br />4G (pure IP) mobile networks<br />Dedicated and super-powerful DSPs and CPUs<br />
  9. 9. IP Video in Numbers – growing, growing, growing <br />The expected Internet traffic volume for video calling in 2015 is 400,000,000 TB (source: discovery.org)<br />The expected Internet volume of Internet video, virtual worlds and gaming in 2015 is 200,000,000 TB<br />The market for IPTV video services will reach $26.3 billion in 2011, not including advertising and value-added TV services, according to iSuppli.<br />
  10. 10. Video Conferencing Market StatisticsENTERPRISE VIDEO CONFERENCING SYSTEMS UNITS SHIPPED<br />
  11. 11. Video Conferencing Market Statistics<br />39%<br />68%<br />Large Enterprise Video Conferencing: Y2008 Revenues $1.5B<br />Large Enterprise Video Conferencing: Y2012 Revenues $1.7B<br />5%<br />23%<br />33%<br />7%<br />Multi Codec TP<br />Conf Rooms<br />Executive<br />Personal Video<br />17%<br />8%<br />
  12. 12. Video Conferencing Market StatisticsENTERPRISE PERSONAL VIDEOCONFERENCING SYSTEMS UNITS SHIPPED<br />
  13. 13. Video Quality Measurement Methods<br />
  14. 14. The Importance of Video Quality <br />Increased user satisfaction<br />The visual sense is extremely important<br />Video services are becoming a popular mode of<br /> communication at reasonable prices<br />
  15. 15. Factors that Affect Video Quality<br />Network conditions <br />Source of the video<br />Compression level<br />Image complexity <br />Content type <br />Network<br />Parameters <br />Content <br />Parameters <br />Video <br />Parameters <br />Image <br />Parameters <br />Content <br />Type<br />
  16. 16. How Video Differs From Voice<br />Video compression is complex and handles much more information<br />More parameters to configure: <br />Network<br />Codec <br />Content type<br />Video HD can use up to 16 Mbs (audio is up to 64Kbs) <br />
  17. 17. Video Quality Score Challenges<br />Can Video Quality be measured?<br />Manually <br />Automatically <br />If so, how do we measure it?<br />Online or offline? <br />
  18. 18. MOS<br />Mean Opinion Score (MOS):<br />The arithmetic mean of all individual observations, ranging from 1 to 5.<br />MOS Quality Impairment: 5 Excellent: 4 Good: 3 Fair: 2 Poor: 1 Bad<br />Good<br />Fair<br />Poor<br />Bad<br />
  19. 19. Video Quality Measurement Methodologies<br />“Full-Reference”Offline <br />“No Reference”<br />Real-time <br />Video Quality<br />
  20. 20. Video Quality Innovative Research <br />
  21. 21. RADVISION’s Video Quality (VQ)<br /><ul><li>17 years of experience in Video Conf
  22. 22. Leading Video Over IP Core technology
  23. 23. Compliant with leading standards
  24. 24. Plays a vital role in standardization
  25. 25. RADVISION’s IPR
  26. 26. Proprietary advanced VQ technology
  27. 27. VQ cause analysis and optimization
  28. 28. Human vision database
  29. 29. Unique synchronization algorithm
  30. 30. Video Quality - innovative and unique research
  31. 31. VQ databases and data analysis
  32. 32. VQ assessment techniques
  33. 33. VQ formulas and coefficients
  34. 34. Stream analysis and synchronization
  35. 35. Jointresearch with academia
  36. 36. Image processing
  37. 37. Packet loss analysis
  38. 38. VQ No-Reference algorithms</li></li></ul><li>RADVISION’s Human Vision Database<br />Video Quality Surveys<br />Unprecedented in scope (x1000 inputs)<br />Variable contents: video conferences, streaming, motion pictures…<br />Variable artifacts: blockiness, packet loss, blurriness…<br />Worldwide, different viewing preferences<br />Guarantees high correlation with Human Perception<br />Database enhanced with state-of-the-art RV Full-Reference algorithms<br />
  39. 39. RADVISION’s Packet Loss Detector<br />Video packet loss concealment detection based on image content <br />Innovative research presented at the 16th European Signal Processing Conference (EUSIPCO2008)<br />Over 90% detection precision<br />
  40. 40. RADVISION’s Packet Loss Propagation Analysis<br />Advanced techniques for packet loss propagation analysis, based on:<br />Refresh rate – Intra frame or Intra macro blocks<br />Packet loss percentage <br />Packet loss patterns<br />Standard VMOS: 2.4<br />RV VMOS: 2.4<br />Standard VMOS: 4.4<br />RV VMOS: 2.4<br />Standard VMOS: 4.4<br />RV VMOS: 4.4<br />Figure A: No Packet loss<br />Figure B: Packet loss<br />Figure C: Propagation of Packet loss<br />
  41. 41. RADVISION’s Synchronization Algorithm <br />Unique algorithm to synchronize original  degraded<br />Different frame rates <br />Resizing <br />Partial picture <br />Picture in picture <br />Compression artifacts<br />Black period<br />Welcome frames<br />Logo additions<br />Title additions<br />25<br />
  42. 42. RADVISION’s Content-Based VQ <br />Compression: tradeoff between motion and sharpness<br />Quality of Experience depends on video content <br />VQ algorithms take different types of content into consideration<br />
  43. 43. Video Quality Algorithms<br />
  44. 44. Video Quality, Full-Reference <br />“Full-Reference”<br />Full-Reference allows you to perform a Video Quality analysis and compare the degraded video sequence to the original one<br />Synchronize original and degraded streams <br />Video Quality algorithm based on frame analysis <br />Partial picture analysis <br />
  45. 45. Video Quality, Full-Reference Metrics <br />“Full-Reference”<br />Blurriness<br />PSNR, MSE <br />Blockiness, Blurriness<br />Freeze, Frame Loss <br />Jitter, Delay, Packet Loss <br />… <br />Blockiness<br />Noise<br />
  46. 46. Video Quality No-Reference Standard <br />“No Reference”<br />ITU G.1070 video quality estimation<br />Real-time <br />Automatic <br />Based on: <br />Network<br />Codec parameters <br />ITU-R BT.500-9. Subjective Video Quality assessment <br />Good<br />Fair<br />Poor<br />Bad<br />
  47. 47. Advanced Online Video Quality<br />“No Reference”<br />Additional techniques for performing global video quality estimation, based on: <br />Packet loss affectation and propagation <br />Quality score based on the dynamism level of the video and compression<br />Bit-rate and frame-rate fluctuation considered as indication of quality<br />Reason for Video Quality degradation, as well as optimization methods<br />
  48. 48. Accuracy <br />Our algorithm accuracy is compared to our subjective and objective databases. <br />Cross correlation factor of more than 90%. And these results are constantly improving with development and progress.<br />√<br />ITU . Standard <br />√<br />RV Advanced techniques <br />
  49. 49. RADVISION Video Quality <br />Solutions<br />
  50. 50. RADVISION Video Quality Solution<br />OEM <br />VQ SDK is a building block for the development of a wide range of video applications <br />ProLab<br />R&D and QA-Labs<br />SIP, IMS, 3G, H.323 complete testing solutions<br />Enterprise & <br />Service Provider <br />Active Monitoring (H.323 & SIP)<br />Voice & Video analysis and measurement (Passive) <br />
  51. 51. RADVISION’s VQ SDK: <br />The RADVISION VQ Online Toolkit is a building block for the development of a wide range of video applications, to: <br />Measure Video Quality in real-time<br />Perform Cause Analysis <br />Offer quality improvement options<br />
  52. 52. Video Quality Passive Monitoring - Features <br />
  53. 53. Active Monitoring<br />eVident ensures:<br />Network readiness for Voice and Video over IP<br />Improved/Ensured end-user experience<br />Correct network configuration<br />Topology emulation, including interaction with various types of infrastructures<br />Distributed solution<br />Fault protection and preventing problems via proactive testing<br />Application & protocol testing using SIP and H.323 <br />
  54. 54. ProLab - IMS, 3G and VoIP Testing Architecture<br />SIP<br />IMS<br />324M<br />H.323<br />Terminal<br />Server <br />Media <br />Emulation <br />Media Quality <br />Automation <br /><ul><li>SIP
  55. 55. H.323
  56. 56. IMS
  57. 57. 3G-324M
  58. 58. SIP Server
  59. 59. IMS Server
  60. 60. Gatekeeper
  61. 61. Media emulation
  62. 62. Network Impairment
  63. 63. Media Viewer
  64. 64. Audio & Video Playback
  65. 65. Audio MOS Ref-based (PESQ)
  66. 66. Audio MOSNo-reference
  67. 67. Video MOSFull-reference
  68. 68. Video MOS No-reference,Passive
  69. 69. XML/API
  70. 70. Test Scheduler
  71. 71. Test ResultAnalysis
  72. 72. Built-in script </li></li></ul><li>ProLab<br />Thank You!<br />Eli Cohen<br />http://blog.radvision.com/<br />www.radvision.com<br />elic@radvision.com | +972-3-7679631<br />

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