27/11/2004 Video on Demand 1 41306/3B Group 10 Au Chok Wai (1) Chan Chi Cheong (2) Lam Shing Chi (13) Wong Lai Ting (33) Wong Mei King (34)

27/11/2004 Video on Demand 1

Video on Demand

41306/3B Group 10Au 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?Direction for future developmentLimitationsActual ExamplesVideo-on-Demand in Hong Kong

iTVnow Broadband TV


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 s

erver 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.


How does the system work?


How does the system work? (con’t)

1. Movies are stored on a video server and delivered digitally to the home via telephone wire or other varieties of cable networks.

2. 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. 3. 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.


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


Direction for future development

ultimate consumer video application and is increasingly A service that allows subscribers to watch what they want, when t

hey want some form of VOD is now available through approximately 40% o

f 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.


Actual examples

The Conveyance Facilities for HKTC’s VOD Trial


Actual examples (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.


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


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 in Hong Kong

1. Hong Kong Telecom IMS (Interactive Multimedia Services Limited)

2. now Broadband TV (PCCW)


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.


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)

I. Hong Kong Telecom IMS (con’t)


I. Hong Kong Telecom IMS (con’t)

Technology of iTV The system is full ATM (Asynchronous Transport Multi

plexing) 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


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.


II. now Broadband TV (con’t)

What are the key features of this new service?1. True customer choice - can freely choose

which channels to subscribe 2. Quality family entertainment with exclusive

world class contents 3. Pay by channel - offering customers with

choice and flexibility in channel selection 4. Low entry barrier - free decoder & free

installation 5. Synergy with high quality of PCCW service


II. now Broadband TV (con’t)

Technology of now Broadband TVIt leverages on the NETVIGATOR

Broadband network multi-casting technology to deliver high

TV quality to the audience.


II. now broadband TV (con’t)

What is the difference between now Broadband TV & iTV?

now Broadband TV iTV7 x 24 broadcasting channels DVD picture quality on TV Various content Pricing by individual channel

Video-on-demand Low picture quality Mainly movies With monthly fee & pay per view


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/


Documents

27/11/2004 Video on Demand 1 41306/3B Group 10 Au Chok Wai (1) Chan Chi Cheong (2) Lam Shing Chi (13) Wong Lai Ting (33) Wong Mei King (34)