High-Bandwidth Multipoint HD Video Conferencing
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High-Bandwidth Multipoint HD Video Conferencing a presentation by Marv Schwartz, Case Western Reserve U. at the US Ignite ONF GENI workshop on October 8, 2013
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High-Bandwidth Multipoint HD Video Conferencing
- 1. High-Bandwidth Multipoint HDVideo Conferencing Without an MCU Marv Schwartz mss@case.edu www.caseconnectionzone.org A Research Project of CaseWestern Reserve University
- 2. Problems with Current Systems MCU Clients Limited access, number of sessions, number of clients Dedicated client software and MCU limit quality and bandwidth used MCU functions are compute intensive, decoding, reformatting and encoding video Expensive, Risky—not scalable to the larger community, especially for underserved Expensive to administer, maintain and upgrade
- 3. Our Solution Clients Master Client Distribute MCU functions to clients Control protocol (SIP or like SIP) Master specifies video stream size, codec, etc. sent by each client Master provides presentation frame Clients encode and format video and send to every other client Clients decode streams and present multiple video frames
- 4. Status Clients Master Client Point-to-point alpha software Uses gig bandwidth Great video Great audio Next Steps: Port from Max to C++ Multipoint SDN Routing
- 5. Unicast Routing Clients Leader Divides available bandwidth by number of clients reducing quality
- 6. SDN Routing Clients Leader HighQuality Low Latency Layer 2 No Multicast Replication in SDN routers to maximize bandwidth
- 7. Security Clients Leader Medical and other confidential information Should be end-to-end but not be a client responsibility Open Source Cryptography—simple, trusted, vetted, no backdoors GENI Slices?
- 8. Importance, Impact, and Novelty Clients Master Client Adaptive—determines available bandwidth and client capability—3D, 4K, holographic Control protocol accommodates current and future codecs over a range of bandwidth Free (so seniors and other individuals with resource constraints can be included) Any group of two or more clients can have a multipoint video conference Low latency—goal is the same dynamic as an in-person meeting
- 9. Feasibility, Scale, and Scale Up Clients Master Client Ad hoc groups of clients can create their own conferences Conference access can be advertised on community websites Leverages open source and standards (SIP, HTML5, codecs) GENI nodes or NetServ routers could offload client encoding, and decoding --enables older endpoints (important for underserved communities) --future possibility: client can specify the presentation frame
Notas del editor
- Commercial HD multipoint videoconferencing is limited by the MCU in access, quality, and quantity.As we reach out to communities and schools we need low cost or free software.We need higher resolution and can use higher bandwidth than commercial implementations support.
- Distribute the functions of the MCUOpen sourceEliminate the need to decode and re-encode videoControl protocol that accommodates future codecs and increased network bandwidthAd hoc master node (client that controls a conference)Determine available bandwidth and processing power as each client joinsEach clients encodes video in the requested size and format“Bundle” the video streams from all clients and send to each client in a multi-track streamPush encoding/decoding, reflection and other MCU functions into NetServ router services
- Distribute the functions of the MCUOpen sourceEliminate the need to decode and re-encode videoControl protocol that accommodates future codecs and increased network bandwidthAd hoc master node (client that controls a conference)Determine available bandwidth and processing power as each client joinsEach clients encodes video in the requested size and format“Bundle” the video streams from all clients and send to each client in a multi-track streamPush encoding/decoding, reflection and other MCU functions into NetServ router services
- Distribute the functions of the MCUOpen sourceEliminate the need to decode and re-encode videoControl protocol that accommodates future codecs and increased network bandwidthAd hoc master node (client that controls a conference)Determine available bandwidth and processing power as each client joinsEach clients encodes video in the requested size and format“Bundle” the video streams from all clients and send to each client in a multi-track streamPush encoding/decoding, reflection and other MCU functions into NetServ router services
- Distribute the functions of the MCUOpen sourceEliminate the need to decode and re-encode videoControl protocol that accommodates future codecs and increased network bandwidthAd hoc master node (client that controls a conference)Determine available bandwidth and processing power as each client joinsEach clients encodes video in the requested size and format“Bundle” the video streams from all clients and send to each client in a multi-track streamPush encoding/decoding, reflection and other MCU functions into NetServ router services
- Distribute the functions of the MCUOpen sourceEliminate the need to decode and re-encode videoControl protocol that accommodates future codecs and increased network bandwidthAd hoc master node (client that controls a conference)Determine available bandwidth and processing power as each client joinsEach clients encodes video in the requested size and format“Bundle” the video streams from all clients and send to each client in a multi-track streamPush encoding/decoding, reflection and other MCU functions into NetServ router services
- Platform needed for gig apps to connect people in many fields.Open architecture and control protocol will accommodate future codecs and networkMany concurrent videoconferencesMany participants in a single conference (classes, support groups, meetings)Determines and adapts to available bandwidth (and possibly to client processor resources)