Published on June 7, 2016

Author: VinayagamMariappan1

Source: slideshare.net



2. Media Services IPTV OTT Netflix CDN ABR Agenda 2eSILICON LABS 2015

3. Media Services 3eSILICON LABS 2015

4. • Terrestrial TV • Satellite TV • Cable TV • Mobile TV • IPTV Traditional Media Services 4eSILICON LABS 2015

5. Media Services Trends 5eSILICON LABS 2015

6. • Interactive TV • Video on demand (VOD) • Time shifted − Catch-up TV (replays a TV show that was broadcast hours or days ago) − Start-over TV(replays the current TV show from its beginning) IPTV 6eSILICON LABS 2015

7. • Content: the media (video, audio) • Video Head end: converts the content into suitable format, e.g. MPEG2, MPEG4 • Service Provider IP Network: the backbone network of the service provider (or multiple service providers). • Service Provider Access Network: often called the “last mile” to the users premise (house, office). Technologies such as ADSL, FTTH and Ethernet • Home Network: set-top-box, TV’s, PCs, Smart TV, game consoles and etc…) Video Headend Content Service Provider IP Network Service Provider Access Network Home Network IPTV Network Elements 7eSILICON LABS 2015

8. • Broadcast • Unicast • Multicast IP Media Transfer 8eSILICON LABS 2015

9. • Broadcast (send to everyone) − Mainly used for TV guide distribution, and informational updates • Unicast (send to individual) − video-on-demand of specialise content − Unicast allows an individual to view content whenever desired, but is expensive (in terms of network overhead) • Multicast (send to group of users) − Main form of delivery, especially for popular content − Users select a channel/content (equivalent of joining multicast group), and that is efficiently delivered to all users − Even used for video-on-demand (even for specialised content, likely there will be multiple users wanting to watch at the same time) IPTV Delivery 9eSILICON LABS 2015

10. • Delivery of audio, video, and other media over the Internet without the involvement of a multiple-system operator • The Internet provider may be aware of the contents of the Internet Protocol packets but is not responsible for, nor able to control, the viewing abilities, copyrights, and/or other redistribution of the content. OTT (Over The Top) 10eSILICON LABS 2015

11. • Easy to get confused OTT with IPTV, but the key difference is that IPTV is provided over managed networks. • IPTV networks fully manage and control the traffic, delay and bandwidth characteristics, so as to guarantee a predictable viewer experience. • OTT in particular refers to content that arrives from a third party – such as Netflix, Hulu, Amazon, YouTube and is delivered to an end-user device, leaving the ISP only the role of transporting IP packets. OTT vs IPTV 11eSILICON LABS 2015

12. $7.99 per month $8.39 per month OTT Service Providers 12eSILICON LABS 2015


14. • Netflix pokes fun at Amazon with explosive new drone-delivery video • Amazon Prime Air is a conceptual drone-based delivery system currently in development by NETFLIX 14eSILICON LABS 2015

15. • The company was established in 1997 and is headquartered in California and started its subscription-based service in 1999. • Netflix grew as DVD sales fell from 2006 to 2011 • By 2009, Netflix was offering a collection of 100,000 titles on DVD and had surpassed 10 million subscribers. • On February 25, 2007, Netflix delivered its billionth DVD. • As of October 2015, Netflix reported 69.17 million subscribers worldwide, including more than 43 million in the U.S. NETFLIX 15eSILICON LABS 2015

16. • While numerous companies throughout the world have started OTT services, it can be argued that Netflix of the United States is the most successful. • Originally, DVD rental-via-mail business • Netflix online allows you to watch as many videos as you want for a flat monthly rate – all conveniently streamed directly to your home. Initially only viewable on a PC-based player, Netflix now supports direct playback on a wide variety of devices including game consoles, mobile devices and Internet connected TV sets. NETFLIX 16eSILICON LABS 2015


18. HOW IT WORKS? • simply, it is a web server. • Viewing devices use the exact same technologies and protocols as any standard website. • As with accessing any web page, the client device uses the HTTP GET command to retrieve a file from a particular web server. The host to access and the specific file asset are identified by the familiar URL • http://euronews.com/sport NETFLIX 18eSILICON LABS 2015

19. NETFLIX Delivering Methods - Fixed rate – early streaming system - Chunks: TV contents divided into multiple segments.(actual size of chunks is dependent on the bit rate encoding) - Screen size, bit-rate, internet connection etc. will be handles 19eSILICON LABS 2015

20. CDN (Contents Delivery Network) - Players network is divided into Contents Providers and Service Providers CDN 20eSILICON LABS 2015

21. Cache server / Origin server - Sometimes many cache servers are needed. Once content is requested by a client, the network first checks if it is available in a cache server, and if not, the content is then pulled in from the origin server to the cache. CDN 21eSILICON LABS 2015

22. Sample protocol files (Manifest files) - Manifest files are divided into several files. - Master file has the list of bit files CDN 22eSILICON LABS 2015

23. CDN Sample protocol files (Manifest files) - The master file lists the bit rates available for a particular movie. Each bit rate is linked to another manifest, which lists in sequence, the URLs of each file chunk for that bit rate. - To date, the format of the manifest file and detailed adaptive bit rate mechanisms have been vendor specific. 23eSILICON LABS 2015

24. TCP (Transmission Control Protocol) based system - IP network (data transmission): UDP system and TCP system - UDP is good for Multicasting (IPTV is using this). CDN 24eSILICON LABS 2015

25. Multi-rate Encoding system - Latest = Adaptive Bit Rate Network. - Different Devices use different bit-rates Adaptive Bitrate Control 25eSILICON LABS 2015

26. • Detecting a user's bandwidth and CPU capacity in real time and adjusting the quality of a video stream accordingly • Requires the use of an encoder which can encode a single source video at multiple bit rates • The player client switches between streaming the different encodings depending on available resources • The result: very little buffering, fast start time and a good experience for both high-end and low-end connections Adaptive Bitrate Streaming 26eSILICON LABS 2015

27. • Multi-screen services are based on ABR and video streaming over HTTP. • HLS - from Apple (HTTP Live Streaming) • HSS - from Microsoft (HTTP Smooth Streaming) • HDS - from Adobe (HTTP Dynamic Streaming) • MPEG-DASH from MPEG. ABR (Adaptive Bitrate) Technologies 27eSILICON LABS 2015

28. 28eSILICON LABS 2015

29. • HLS stands for HTTP Live Streaming and is Apple’s proprietary streaming format based on MPEG2-TS. It’s popular since it provides the only way to deliver advanced streaming to iOS devices. • HDS stands for HTTP Dynamic Streaming and is Adobe’s format to deliver fragmented mp4 files (fMP4). HLS uses MPEG-2 Part 1, while HDS uses MPEG-4 Part 14 and Part 12. • MPEG-DASH. MPEG, the standards body responsible for MPEG-2 and MPEG-4, is addressing dynamic adaptive streaming over HTTP (MPEG-DASH) through the use of four key profiles—two around CFF for fMP4 and two for MPEG-2 TS. ABR (Adaptive Bitrate) Technologies 29eSILICON LABS 2015

30. Recommended Bit-rates and Network Speed - Codec used: initially VC-1 for video and WMA for audio, now H.264 (AVC), VC-1, H.263 and H.265 (HEVC) for video, and Dolby Digital, Dolby Digital Plus, AAC and Ogg Vorbis for audio. - According to Netflix, encode the same title 120 different times before it can be delivered. - Netflix uses adaptive bitrate streaming technology to adjust the video and audio quality to match a customer’s broadband connection speed and real-time network conditions. Quality Required download speed Minimum (low) 1.5Mbit/s DVD quality (480p) 3Mbit/s HD (720p) 5Mbit/s Super HD (1080p) 7Mbit/s 3D Streaming 12Mbit/s 4K UHD (2160p) 25Mbit/s ABR (Adaptive Bitrate) Technologies 30eSILICON LABS 2015

31. Future Media Services 31eSILICON LABS 2015


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