27/11/2003 Video on Demand 1 41306/3B Group 10 Au Chok Wai (1) Chan Chi Cheong (2) Lam Shing Chi...
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27/11/2003 Video on Demand 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)
27/11/2003 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)
27/11/2003 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)
Slide 3
27/11/2003Video on Demand2 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
Slide 4
27/11/2003Video on Demand3 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.
Slide 5
27/11/2003Video on Demand4 How does the system work?
Slide 6
27/11/2003Video on Demand5 How does the system work? (cont) 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.
Slide 7
27/11/2003Video on Demand6 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
http://localserver/video1.mpg
Slide 8
27/11/2003Video on Demand7 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.
Slide 9
27/11/2003Video on Demand8 Actual examples of HKTC The
Conveyance Facilities for HKTCs VOD Trial
Slide 10
27/11/2003Video on Demand9 Actual examples of HKTC (cont) 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.
Slide 11
27/11/2003Video on Demand10 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
Slide 12
27/11/2003Video on Demand11 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, http://www.vodnews.tv 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.
Slide 13
27/11/2003Video on Demand12 Video-on-Demand in Hong Kong 1.
Hong Kong Telecom IMS (Interactive Multimedia Services Limited) 2.
now Broadband TV (PCCW)
Slide 14
27/11/2003Video on Demand13 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.
Slide 15
27/11/2003Video on Demand14 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 (cont)
Slide 16
27/11/2003Video on Demand15 I. Hong Kong Telecom IMS (cont)
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
Slide 17
27/11/2003Video on Demand16 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.
Slide 18
27/11/2003Video on Demand17 II. now Broadband TV (cont) 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
Slide 19
27/11/2003Video on Demand18 II. now Broadband TV (cont)
Technology of now Broadband TV It leverages on the NETVIGATOR
Broadband network multi-casting technology to deliver high TV
quality to the audience.
Slide 20
27/11/2003Video on Demand19 II. now broadband TV (cont) What is
the difference between now Broadband TV & iTV? now Broadband
TViTV 7 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