4. The Evolution of Visual Communications 1990 2003 H.263+/++ H.263 H.261 H.264 MPEG 4 MPEG 2 MPEG 1
5. VC Evolution Is a BIG Challenge FPS bitrate 1080p(1080x1920 pixels)60 FPS 5Mbps 720p (720x1280 pixels)30 FPS 2Mbps CIF (352x288 pixels)20 FPS 256Kbps qCIF (176x144 pixels)15 FPS 64Kbps resolution
6. One Stream to Feed Them All… Generate a single video stream that can serve multiple users with different capabilities “One ring to rule them all”
7. Scalable Video Coding to the Rescue Temporal - Change of frame rate (e.g 30 FPS, 15 FPS) Spatial - Change of resolution (e.g 720p, 480p, CIF) Fidelity / SNR - Change of quality (e.g 2 Mbps, 784 kbps)
8. Introducing H.264/SVC May 2003: H.264/MPEG-4 AVC completed Oct 2003: H.264/SVC - Scalable Video Coding extension Covers Temporal, Spatial and Fidelity scalability July 2007: “Scalable Video Coding” approved as H.264 Amdt. 3 or Annex G
10. Why a Layered Structure? Single Layer (e.g 720p@30 FPS) H.264 Enhancement Layer (e.g 720p@30 FPS) SVC Enhancement Layer (e.g CIF@30 FPS) Base Layer (e.g qCIF@15 FPS)
11. Layer Thinning The process of removing video layers done by a Media Aware Network Element (MANE) Enhancement Layer(720p@30 FPS) MANE Enhancement Layer (CIF@30 FPS) Enhancement Layer (720p@30 FPS) Base Layer (qCIF@15 FPS) Base Layer (qCIF@15 FPS)
12. The Hidden Promise of SVC The layered structure of SVC introduces higher level of error resilience H.264 SVC H.264 The layered structure of SVC allows Unequal Error Protection (UEP)
17. A Complete Scalable Solution SVC Based Desktop Clients Rest of the world ROOM SYSTEMS SCOPIA DESKTOP TELEPRESENCE SCOPIA DESKTOP VC240 UNIFIED COMMUMICATIONS
18. all this and more: http://www.videooverenterprise.com Thank You