[DGBTR2012] SVC-based high quality T-DMB service for real-time live streaming in hybrid broadcast and cellular networks
18 October 2012 Mobile/DTV Research Team Technical Research Institute Korean Broadcasting System (KBS) Sungho Jeon 田聖浩, Research EngineerTRI
Mobile Video Will Generate Over 70 Percent of Mobile Data Trafficby 2016. 1018 bytes = Exabytes *Figures in legend refer to traffic share in 2016. How to satisfy this demand? *CAGR = Compounded Annual Growth Rate [source] CISCO Visual Networking Index (VNI) Mobile, Feb. 2012.
Smart DMB on the WebStructure of Conventional DMBload sharing… source 450kbps Real-time DMB Multiplexer MPEG-4/AVC Encoder DMB transmitter APP Streaming Server WiFisource 3G/4G 1~2Mbps Real-time MPEG-4/AVC Encoder
Although Smartphone screens are getting bigger T-DMB hadn’t changed a bit. , How to ensure T-DMB are retained in the future mobile multimedia service offering?T-DMB = only Conventionalnetworks DMB Enlarging the image by force Standard quality serviceT-DMB hybridnetworks + = Conventional DMB Adding the enhancement layer High quality service
SystemDMB on the Web Smart Structure for SVC-based High Quality DMB Service load sharing… Innovative way for cooperation between broadcast and mobile broadband source 450kbps BaseReal-time SVC Encoder DMB Multiplexer Layer Enhancement Layer ② DMB transmitter ① ③ DMB API HLS Distribution HTTP Server Streaming WiFi ④ <450kbpsMobileDNS Server 3G/4G with API Authentication Services Networks Terminals
Broadband access networks (i.e. one‐to‐one) are particularly inefficientto deliver multimedia contents to a massive number of mobile users. [source] Scenarios and Use Cases for FoBTV, v2.1, 6 Sept. 2012. Head Long Tail Suitable for Suitable for Broadband Access Broadcast
Broadcast networks (i.e. one‐to‐many) are particularly efficient to a massive number of mobile users. Regardless of the number of concurrent users,Traffic Cost traffic cost stays constant in broadcast networks Concurrent Users The economics of supporting linear, primetime, viewing over the internet do not pass muster. [source] HIS-screendigest, UK Media Report, 2012.
Mobile broadband alone cannot satisfy the users’ demand for mobile data‘tsunami.’ Broadcasting networks, in particular over-the-air, arecomplementary to mobile broadband. YouTube = 80,000 users Ustream = 120,000 users Total 200,000 users = only 0.4% in population ratings
Mobile broadband alone cannot satisfy the users’ demand for mobile data‘tsunami.’ Broadcasting networks, in particular over-the-air, arecomplementary to mobile broadband. 25% in DMB occupancy ratings
Even though Non-linear services are expected to grow, Linear broadcasting services are here to stay, and remain important. SK TelecomNAVER (Web portal) 06 August 2012 1Mbps Net Neutrality01 June 2011 650kbps U+ HDTV KT olleh TV nowLive streaming blocked by TelcosPandora TV (CP) 2Mbps 01 June 2012 1,000kbps
#1. Before Standardization for DMB Device APIto create client-side APIs that enable the development of Web Applicationsand Web Widgets that interact with devices services Android OS Samsung API LG API Pantech API Developing the apps for individual manufacturers and models
#1. After Standardization for DMB Device APISmart DMBto create client-side APIs that enable the development of Web Applicationsand Web Widgets that interact with devices services Android OS Common DMB Device API (Special Committee for T-DMB) Developing the only common app based on common DMB device API
#2 Real-time Scalable Video Codec (SVC) Encoder The base layer bitstream is backward fully compatible to conventional T-DMB Cellular HTTP Network Streaming Enhancement (3G/4G, Layer WiFi, etc) High quality video High Quality (640x480) Video ServiceSub-Sampling Up-Sampling Base Layer Standard quality video T-DMB (320x240) Broadcast Standard Quality Network Video Service
#3. HTTP Streaming Service for distributing enhancement layersHTTP Live Streaming supports multiple alternate streams at different bit rates,and the client software can switch streams intelligently as network bandwidth changes.A simplified example of adaptive streaming offered to end-users.Example of an extended M3U playlist which contains several sub-playlists,consequently providing alternate stream at different qualities.
#4 MobileDNSTechnology that lets broadcast radio and the internet work together:enhancing the listener experience, and making radio better. MobileDNS mobiledns.org EPG Server Programmed DMB transmitter associated EPG scids.sid.eid.ecc.dmb 2 XSI.xml Constructed ~ 7 Authoritative FQDN FQDN <date>_PI.xml 6 HLS Query 8 9Distribution Local DNS Server to resolve IP address Query 1 1 0 7 Enhancement Layer connected
Hybrid broadcast/broadband approach is the way to go. How to leverage on the strengths of over-the-air broadcast in the hybrid world?[AS-IS] [TO-BE] maximize REACH maximize COST EFFICIENCY improve QUALITY and EXPERIENCE Overlapping investments Profit Telco Broadcaster Telco sharing Broadcaster Network overload Small screen size 3G/4G DMB 3G/4G Cooperation DMB cellular networks cellular networks Wasting bandwidth to deliver the same contents