1. Presented by : BEN AMOR Adel MAKNI Mahmoud Ramzi
Service et Administration
des Réseaux
Streaming
Presented by :
BEN AMOR Adel
MAKNI Mahmoud Ramzi

2. Outline What is streaming ? Why streaming ? Streaming Mode
Type of streaming
Comparison streaming & streaming approach
Principle of broadcasting
Protocol
Players
Conclusion
Demonstration

3. What is streaming ? Stream = flow
Technical data transfer as a steady and continuous stream
Allows you to view and distribute multimedia content in real time.

4. Why streaming ? Distance Learning Web TV and Web Radio
Remote monitoring
VoD ( VideoOn Demand)
…..

5. Streaming Mode

6. Streaming Mode

7. Type of streaming Simplest approach audio or video stored in file
files transferred as HTTP object
received in entirety at client
then passed to player

8. Type of streaming Streaming approach browser GETs metafile
browser launches player, passing metafile
player contacts server
server streams audio/video to player

9. Type of streaming Streaming from a streaming server
This architecture allows for non-HTTP protocol between server and media player
Can also use UDP instead of TCP.

10. Comparison Streaming approach Streaming
Progressive downloading with copy on disk media
almost instantaneous reading on the fly with a time delay in memory
no streaming server
requires a streaming server
uses broadcast protocol HTTP over TCP
uses broadcast protocols RTP / RTCP and RTSP over UDP
no support for multicast and multirate
support of multicast and multirate
not targeted towards multimedia
clearly targeted towards multimedia

11. Principle of broadcasting
Algorithm of transmission side server Control of the arrived packages; if ( lost packages) { Check of the rate of filling of the buffer; if ( enough data) { Broadcast of the lost packages; } otherwise { Tolerance of the losses;
For broadcasting principle we begin with Algorithm of transmission side server

12. Principle of broadcasting
Put in memory plug customer side
constant bit
rate video
transmission
constant bit
rate video
playout at client
client playout
delay
variable
network
delay
client video
reception
Cumulative data
buffered
video
Then during the put in memory plug customer side
We have constant bit rate video transmission
This is variable network delay between constant bit rate video transmission and client video reception
And this is client playout delay between client video reception and constant bit rate video playout client
So this picture show us the Compensation for the deadline of the network ( the gigue)
time
Compensation for the deadline of the network ( the gigue)

13. Principle of broadcasting
Detail of the buffer
constant
drain
rate, d
variable fill
rate, x(t)
After that we have this picture of detail of the buffer
With data come from network with variable fill rate and leave with constant drain rate to decompression and playout
So we conclude that The buffer compensates for the gigue
The buffer compensates for the gigue

14. Protocol RTP/RTCP (RFC 1889)
Protocols over UDP adapted to real time need
RTP (Real-time Transport Protocole)
for routing data
RTCP (Real-time Transport Control Protocole)
to exchange control messages
Channel RTP and RTCP channel for each media (audio, video, ...)
Two neighboring port numbers
RTP → port pair
RTCP → next higher odd port
For part protocol there is the prtocol RTP (Real-time Transport Protocole) & RTCP (Real-time Transport Control Protocole)
They are two
The first
And the second

15. Protocol RTSP : Real Time Streaming Protocol(RFC 2326)
Client-server protocol at the application level
Allows you to control the distribution of RTP streams
Targeted towards multimedia (unlike HTTP)
Control requests RTSP using TCP with a port number reserved (port 554)
Based on RTP / RTCP streams
Functionality provided to the client :
url to search on a media server
orders to advance, rewind, pause, ... in the media
Besides there is RTSP

16. Players
Three main actors, three proprietary technologies, and three incompatible formats :
RealNetworks (RealMedia -.RM, .RA)
Apple (QuickTimeMedia -.QT, .MOV)
Microsoft (Windows Media -.WMV, .WMA, .ASF)
A standardized format for streaming: ISMA
Alternatives solutions
Cisco IP/TV (hardware platform)
VideoLAN (GNU Open Source)
For playing video we must use players so we have

17. Players Different types of players : Real Player
Microsoft Windows Media Player
Apple Quick-time
Of course we have

18. Conclusion
Streaming media is the future of online entertainment. Low cost way to deliver interactive multimedia. Windows Media Services: a comprehensive suite for streaming.
To conclude

19. DEMONSTRATION

20. THANK YOU FOR YOUR ATTENTION