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Video on Demand

Video on Demand. 41306/3B Group 10 Au Chok Wai (1) Chan Chi Cheong (2) Lam Shing Chi (13) Wong Lai Ting (33) Wong Mei King (34). Presentation Content. What the application does? How the system works? Actual Examples Direction for future development Limitations

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Video on Demand

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  1. Video on Demand 41306/3B Group 10 Au Chok Wai (1) Chan Chi Cheong (2) Lam Shing Chi (13) Wong Lai Ting (33) Wong Mei King (34) Video on Demand

  2. Presentation Content • What the application does? • How the system works? • Actual Examples • Direction for future development • Limitations • Video-on-Demand in Hong Kong • iTV • now Broadband TV Video on Demand

  3. What the application does? • User can start the video when he wants:-- • In anywhere, at anytime • A big consumer of resources for the server and the network. • The idea is to do HTTP streaming, • i.e. stream an MPEG video encapsulated in HTTP. • The regulation of the bitrate between the client and the server is done automatically by TCP. • With HTTP version 1.1, there is the possibility to seek in a file downloaded, that's what we use to seek in the video. Video on Demand

  4. How does the system work? Video on Demand

  5. How does the system work? (con’t) • Movies are stored on a video server and delivered digitally to the home via telephone wire or other varieties of cable networks. • A set top box allows subscribers to access the movies they want and to control all playing functions - stop, pause, rewind, fast forward- using a remote control - just like on a VCR. • The picture is equivalent to DVD quality, and the number of movies which can be stored on a server is limited only by Hard Disk real estate. Video on Demand

  6. Actual examples (server side) • Running Web server. • E.g. Linux server running Apache. • Make MPEG-1, MPEG-2 or MPEG-4 / DivX files available to the clients on the Web server. • E.g. we have a Web server whose DNS name is localserver. On this server, we put an MPEG file video1.mpg which will be available to the clients at the URL http://localserver/video1.mpg Video on Demand

  7. Actual examples (client side) • VLC starts to read the stream nearly immediately and you can seek in the stream, make pauses, etc... as if the stream was a local file. Video on Demand

  8. Actual examples of HKTC • The Conveyance Facilities for HKTC’s VOD Trial Video on Demand

  9. Actual examples of HKTC (con’t) • Each customer are provided a downstream data output T1 speed for television signals and a X.25 data communication link for control signals • For a service provider who wishes to carry out a VOD trial over the HKTC network, HKTC offers to provide a T1 circuit and a X.25 packet-switched data communication link between the customers' premises and the nearest local exchange. Video on Demand

  10. Limitations • The lack of a network infrastructure that can handle the large amounts of data required by video. • The technology may not afford too much client access at the same time • The speed may not always stable all the time Video on Demand

  11. Direction for future development • ultimate consumer video application and is increasingly • A service that allows subscribers to watch what they want, when they want • some form of VOD is now available through approximately 40% of all US cable TV systems. • Currently almost four million cable TV subscribers are regularly using the service to watch movies, packaged premium programming, and even "free" shows and events. • http://www.vodnews.tv brings the world of Video-On-Demand together at the internet's first VOD portal, • offering industry professionals and consumers alike a place to view the latest breaking news, • streaming stock market data and discuss VOD manufacturers, MSO's, hardware, software and programming. Video on Demand

  12. Video-on-Demand in Hong Kong • Hong Kong Telecom IMS (Interactive Multimedia Services Limited) • now Broadband TV (PCCW) Video on Demand

  13. I. Hong Kong Telecom IMS • is the first such project in the world to launch the services full-scale • In October 1997, Hong Kong Telecom IMS starts to provide VoD service and makes Hong Kong the first site of launching a commercially available VoD service. Video on Demand

  14. I. Hong Kong Telecom IMS (con’t) • The licence will take effect from 13 February 1998 for a period of 12 years. • The services included are Video on Demand (VOD),Music on Demand (MOD), Home Shopping, and Racing on Demand (ROD) Video on Demand

  15. I. Hong Kong Telecom IMS (con’t) Technology of iTV • The system is full ATM (Asynchronous Transport Multiplexing) based and operates from the server to the STB via an ATM switched network including Broadband Access Systems. • Server is developed by both C++ and Java in development • Home customers will use a thin Java-implemented client on which an OrbixWeb CORBA client runs • The iTV service runs on about 300 servers, including NEC Unix servers for storing video and Sun Microsystems Unix servers to support the navigation information and some other content Video on Demand

  16. II. now Broadband TV (PCCW) What is now Broadband TV? • a new family entertainment • providing 24-hour, • high quality and • world-class entertainment TV channels such as: • Soundtrack Channel, Discovery Showcase, etc. Video on Demand

  17. II. now Broadband TV (con’t) What are the key features of this new service? • True customer choice - can freely choose which channels to subscribe • Quality family entertainment with exclusive world class contents • Pay by channel - offering customers with choice and flexibility in channel selection • Low entry barrier - free decoder & free installation • Synergy with high quality of PCCW service Video on Demand

  18. II. now Broadband TV (con’t) Technology of now Broadband TV • It leverages on the NETVIGATOR Broadband network • multi-casting technology to deliver high TV quality to the audience. Video on Demand

  19. II. now broadband TV (con’t) What is the difference between now Broadband TV & iTV? Video on Demand

  20. Reference URLs • http://www.hoise.com/articles/SW-PR-05-98-3.html • http://www.iona.com/info/aboutus/customers/hkt2.html • http://www.nec.co.jp/press/en/9803/2301.html • http://www2.netvigator.com/nowbroadbandtv/nowbbtv/s5.html • http://bmrc.berkeley.edu/index.html • http://vod.sourceforge.net/pre_project_report.shtml • http://infobase.ibase.com.hk/linux/LDP/REF/VideoLAN-Quickstart/index.html • http://www.prweb.com/releases/2003/9/prweb78434.htm • http://citeseer.nj.nec.com/hua03range.html • http://www.vodnews.tv/ Video on Demand

  21. The End Video on Demand

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