1. Streaming

2. Outline
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5
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Services &
Streaming
Conclusions
Introduction
Demonstration
Protocols
Definition
architectures & types
applications

3. Introduction
• The first generation of web pages was only made with text.
Solution
• Nowadays multimedias take an important part in most web
application.
Streaming is set to transform the World Wide Web:
• There video and audio are accepted as the most natural by
was a problem in the quality of multimedia transfer
the internet. communicate.
way to
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4. What’s Streaming ?
• streaming : transmit audio & video and other
multimedia over the internet without making
viewer waiting.
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5. How streaming video & audio works
?
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6. Streaming architecture
Multicast
Unicast
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7. Streaming Types (1/2)
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8. Streaming Types (2/2)
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9. Streaming Services
• Education (E-learning)
• Web-based channels (Web TV, Web
monitoring,Internet radio)
• Video-on-demand (VOD)
• Music distribution (music on-demand)
• Internet and intranet browsing of content (asset
management)
• Internet broadcasting (corporate
communications)
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10. Principle Streaming
Streaming is based primarily on:
• Broadcast a video of a server to a client.
• Segmentation of the video.
• Assemble packets.
• The video is played on as the packets arrive.
• At the end these packets are then destroyed.
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11. Streaming Applications
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12. Streaming Protocols :
There are currently three protocols that allow for
streaming:
• HTTP.
• FTP.
• RTP.
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13. Streaming Protocols : RTP(1/2)
RTP (Real Time Protocol) :
• RTP was created in 1996 and was defined in RFC 1889
to define functions in real time as the broadcast audio
and / or video.
• The principle of RTP is to send packets in real time on
the network.
• This packets are marked temporally so as to be
rescheduled by the client.
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14. Streaming Protocol :RTP(2/2)
Header IP Header UDP Header RTP Audio & Video Data
• Sequence number : detect packet loss ,sequences loss in the
correct order.
• Timestamp : Synchronization & jitter calculation.
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15. Streaming Protocols : RTSP(1/2)
RTSP (Real Time Streaming Protocol):
• RTSP was created in 1998 by RFC 2326 allows to
control multimedia streams delivered via RTP.
• RTSP is an application layer protocol designed to
operate on protocols such as RTP/RTCP and RSVP.
• It can control the distribution of multimedia streams.
• It provides VCR-like functions remotely like:
– Reading.
– Pause.
– Stop.
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16. Streaming Protocols : RTSP(2/2)
Setup Start an RTSP session and resource allocation
for a stream
Play and Record Start data transmission of the stream
Pause Temporarily halt a stream without freeing server
resources
Teardown Free resources associated with stream and end
of a session
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17. Streaming Protocols :RTCP
• RTCP : Real time Control Protocol
• RTCP is used in conjunction with RTP.
• Feed back on the quality of service (reports : nbre packets
, lost , statistics)
• The feedback messages include reports, such as number
of packets lost and jitter statistics (early or late arrivals).
Recognition of flaws.
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18. Conclusion
Streaming allows us to continue to use applications where
off-line (as opposed to pure web-applications).
It allows the optimization of software licensing.
The maintenance of streaming server is relatively
expensive
It is difficult to keep the service steady if the bandwidth is
low
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19. Demonstration

20. Thank you for your
attention