Transcript RTSP

Ethan Kim
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Websites
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Media Players
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Windows Media Player, Real Player
Video Conferencing
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Youtube, Hulu, Fox, NBC, etc.
Skype, MSN Messenger , Ventrilo
Involved Computing Industry Giants
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iTunes, iPhone/iPad, Google Wave, Google
Voice, Silverlight
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Multiparty Multimedia Session Control
Work Group (MMUSIC WG)
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Part of Internet Engineering Task Force (IETF)
Published documentation as RFC 2326 (1998)
MMUSIC goals and milestones incomplete
since August 2009
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Primary usage of Internet required no
delay constraints
TCP/IP performance satisfactory
Multimedia services gain popularity
TCP/IP identified with limitations
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Unacceptable delay in playback
No mechanism to check bandwidth
TCP does not provide timing information
RTSP developed
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Intentionally similar to HTTP in syntax
and operation
Differences
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New methods and protocol identifier
RTSP server maintains state by default
Both server and client can issue requests
Data is transferred by different protocol
Use ISO 10646 (UTF-8)
Request-URI contains absolute URI
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Privacy
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Security
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Does not pertain to protocol
HTTP authentication methods, transport and
network layer security mechanism apply
Pervasiveness
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Almost all media data is controlled by RTSP
Protocol is used internationally
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Reliability
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Involves unreliable data, protocol is reliable
Allow control by both client and server
Robustness
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No significant bugs or errors have been
identified
Both playback and recording controls are
possible
Allow for multi-servers for multicast and
unicast network
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Interoperability
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Loose coupling
No dependent protocols
Transport-independent
Requires no specific format
Interoperation between clients and servers
from different vendors
Support of the Community
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Maintained by MMUSIC WG of IETF
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Maintainability
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No revision has been made since development
in 1998
Revision was planned for December 2009
Ease of Use
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Requires knowledge of coding, other internet
transport protocols
RTSP is flexible, easy to implement
Easy extendibility
Easy to parse
Proxy and firewall friendly
HTTP friendly
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Implemented in streaming media
players
“Network remote control”
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Designed to control multiple data delivery
sessions
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Breaks data into packets
User is able start listening
Simultaneously more packets are downloaded
and decopressed
Examples
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Youtube, Windows Media Player, Skype
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Necessary and well developed
Flexible, robust, interoperable,
extendable, secure, pervasive, and
reliable
Constant evolving Internet
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Flash vs. HTML5
RTSP is highly adaptable
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Work Cited
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Huuhtanen, Juha. "Real-Time Streaming Protocol
(RTSP)." Real-Time Streaming Protocol
(RTSP). Helsinki University of Technology, 22
Nov. 1998. Web. 19 Apr. 2010.
<http://www.tml.tkk.fi/Studies/Tik110.300/1998/Essays/rtsp.htmlming_
Protocol>.
"Multiparty Multimedia Session Control (mmusic)."
IETF Datatracker. Web. 19 Apr. 2010.
<http://datatracker.ietf.org/wg/mmusic/ch
arter/>.
Schulzrinne, H., A. Rao, and R. Lanphier. "Real Time
Streaming Protocol (RTSP)." Internet
Engineering Task Force. MMUSIC WG, Apr.
1998. Web. 19 Apr. 2010.
<http://www.ietf.org/rfc/rfc2326.txt>.