PERSONAL TELEPRESENCE USING SCALABLE VIDEO CODING Alex Eleftheriadis, Chief Scientist alex@vidyo. com
VIDEOCONFERENCING INDUSTRY – QUALITY VS. SCALE Resolution High Definition Cisco, HP, Polycom Tandberg, Life. Size Standard Definition Quality Interactivity $10 K-$300 K Endpoint Existing Technology All Vendors Price-Performance, Interactivity Cisco, Microsoft, Nortel, Avaya, Siemens Skype, Yahoo, AOL, Adobe, Google Low Definition 10 2 1000 Number of End Points TNC-2008 / May 21, 2008 10, 000 1, 000
KEY VIDEOCONFERENCING SYSTEM CHARACTERISTICS Rate Matching Support for heterogeneous endpoints and access networks Personalized Layout Each user selects the resolution and users he/she wants to see Delay Interactivity requires <200 msec end-to-end Error Resilience Tolerance to packet loss rates >10% Error Localization An error in one user should not affect other users Complexity Lower complexity = Lower cost Low complexity allows to integrate with existing network services (e. g. , in cheap routers) 3 TNC-2008 / May 21, 2008
H. 264 SVC Scalable Video Coding (SVC) Developed by JVT (=Joint Video Team of ITU and ISO) SVC is Amendment 3 to H. 264 AVC Most of SVC is in Annex G of H. 264 AVC CFP April 2004, Consented in Nov 2007 RTP payload format should go to last-call in July 2008 IETF (Dublin) Vidyo™ is the first company to offer H. 264/SVC standard-based solution to solve video conferencing challenges Architecture centered on Vidyo. Router™ 4 TNC-2008 / May 21, 2008
TEMPORAL STRUCTURE OF NONSCALABLE CODECS 5 TNC-2008 / May 21, 2008
TEMPORAL SCALABILITY 6 TNC-2008 / May 21, 2008
SPATIAL SCALABILITY Hierarchical MCP & Intra prediction Spatial decimation motion Base layer coding Inter-layer prediction: • Intra • Motion • Residual Hierarchical MCP & Intra prediction Spatial decimation texture motion Base layer coding Inter-layer prediction: • Intra • Motion • Residual H. 264/AVC MCP & Intra prediction texture motion Base layer coding H. 264/AVC compatible encoder 7 Multiplex TNC-2008 / May 21, 2008 H. 264/AVC-compatible base layer bit-stream Scalable bit-stream
TEMPORAL + SPATIAL SCALABILITY 8 TNC-2008 / May 21, 2008
TEMPORAL + SPATIAL SCALABILITY QVGA 30 fps 9 TNC-2008 / May 21, 2008
TEMPORAL + SPATIAL SCALABILITY VGA 15 fps 10 TNC-2008 / May 21, 2008
MULTIPOINT WITH NATIVE RATE MATCHING Vidyo. Router™ High Resolution High Frame Rate 1. 5 Mbps Medium Resolution High Frame Rate 512 Kbps Medium Resolution Medium Frame Rate High Resolution High Frame Rate 256 Kbps Low Resolution Low Frame Rate 128 Kbps 11 TNC-2008 / May 21, 2008
TRADITIONAL TRANSCODING MCU ENCODE DECODE Packet Loss Sensitivity, Requires Dedicated Network 12 High Cost High Delay Quality Degradation TNC-2008 / May 21, 2008
VIDYOROUTER™ ENCODE Vidyo. Desktop™ Endpoint Vidyo. Room™ Endpoint Vidyo. Router™ DECODE Vidyo. Room™ Endpoint 13 TNC-2008 / May 21, 2008
VIDYOROUTER™ VS. MCU Vidyo. Router is simply an application layer router Nearly zero-delay (~10 msec), allows cascading Eliminates video quality loss due to transcoding Extremely low cost of compute power Limiting parameter is network I/O bandwidth and not number of video streams or resolution Endpoint processing of the video from different participants makes the Vidyo. Router highly scalable Rate matching and personalized layout are routing decisions Similar complexity to other network appliances USER 1 DECODE COMPOSE USER 2 USER 1 Vidyo. Router USER 2 ROUTE MCU USER 3 ENCODE 14 USER 3 TNC-2008 / May 21, 2008
HD AT 60 FPS ON EVERY PORT 9 -site call (US and Europe) mixing HD Rooms and VGA desktops across the public Internet 15 TNC-2008 / May 21, 2008
ERROR RESILIENCE Conventional Coding Significant Impact Scalable Coding Minor or No Impact Low Reliability Channel High Reliability Channel 16 TNC-2008 / May 21, 2008
MCU VS. VIDYOROUTER™: COMPUTATION 17 Transcoding MCU is complex, adds delay and distortion, and scales poorly Move to HD 720 p to HD 1080 p to HD 1600 p requires “forklift” upgrade for a transcoding MCU TNC-2008 / May 21, 2008
MCU VS. VIDYOROUTER™: NETWORK Vidyo. Router operates effectively over the Internet Cascading Vidyo. Routers improves user experience, even in pointto-point calls 18
VIDEOCONFERENCING INDUSTRY – THE FUTURE Resolution High Definition Cisco, HP, Polycom Tandberg, Life. Size Standard Definition Quality Interactivity $10 K-$300 K Endpoint Existing Technology All Vendors Price-Performance, Interactivity Cisco, Microsoft, Nortel, Avaya, Siemens Skype, Yahoo, AOL, Adobe, Google Low Definition 10 19 1000 Number of End Points TNC-2008 / May 21, 2008 10, 000 1, 000
VIDYOCONFERENCING™COMPONENTS 20 17 March 2018 Vidyo Proprietary Confidential & Patent Pending Information
VIDYOCONFERENCING™SUMMARY Based on a new standard H. 264 SVC, the first effective video codec truly designed for converged IP Networks (Internet) Much better user experience: better quality, easier to use, more natural HD becomes deployable everywhere and can reach any desktop or laptop over shared IP networks A unified video solution from telepresence to desktop An affordable and scalable architecture that matches the Internet model 21 TNC-2008 / May 21, 2008 21
VIDYO™DEMO Demo to be held after the end of the session (transatlantic connection using laptop over Wi. Fi connection) Demo accounts can be set up upon request on the Vidyo system hosted by Surfnet (http: //vidyo. showcase. surfnet. nl). Contact: Eric Le Guiniec, eric@vidyo. com 22 22 TNC-2008 / May 21, 2008
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