Video Streaming

1
Video Streaming

• ???µa G????a ??a?e?µ
• ?p?ß??p?? ?a????t?? ?. ??ts???d??

2
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

3
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

4
??sa????

• ???a??µe?? ??t?s? p???µes???? p????f?????, ?
  a???s? t?? d?ad??t??? ? ???s? as??µat?? d??t???
  d?µ??????sa? t? e?d?af???? ??a Multimedia
  Streaming (p?. Video ).
• ????d?? st?? te???????a ?p?????sµ??, st??
  te???????a s?µp?es??, st?? s?s?e??? ap????e?s??
  ?????? e???? ????? ta µe???a d??t?a ?at?st?sa?
  ef??t? t?? pa???? real time multimedia services.
• ? d?a?es?µ?t?ta ?????? as??µat?? d?as??d?se?? µe
  t? d?ad??t?? (???? 802.11b,g) ??e? a???se? t?
  ??t?s? ??a ?????? p???t?ta? pe??e??µe?? ?p??
  e??a? ?? ???? p???µ?s?? (streaming media)

5
??sa???? (s??.)

• Multimedia Streaming
• ? µetaf??? p???µes???? p????f????? (p.? video,
  ???) µ?s? t?? d?ad??t??? ap? t? e??p??et?t?
  (server) st?? pe??t? (client) se p?a?µat??? ?????
• Streaming
• ???a? ? te????? ?at? t?? ?p??a ??a? ???st??
  a?apa???e? ??a a???st??? ? t??e?pt??? a??e?? t?
  ?p??? ?ateß??e? ap? ??a e??p??et?t? p??t??
  pa?a??ße? ???????? t? a??e??. ????? a???se? ?
  a?apa?a????, ta ded?µ??a p??pe? ?a pa?ad?????
  µ?sa st??? ????????? pe?????sµ??? ??a ?a µp???se?
  t? a??e?? ?a pa??e? ?a??????, ?at? s???pe?a e??a?
  p??? e?a?s??t? st?? µe???e? ?a??ste??se??

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??sa???? (s??.)

• ?s??µata ??t?µata p?? ep??e????? t? ???
• ?etaß??t? e???? ?????
• ?aµ???te?? e???? ?????
• ????t???t?ta
• ??a??t?te? epe?e??as?a? (CPU, µ??µ?)
• ??t??eta ap? t? µetaf??? a??e??? ? t? Web
  Browsing, ? ??? p???µ?s?? ??e? s???e???µ??? ???µ?
  µet?d?s?? ?a? ??e???eta? s???????sµ?
• ?? UDP e??a? t? p??t?????? d??t??? t? ?p???
  ???s?µ?p??e?ta? s?????? ??a t? µetaf??? ????
  p???µ?s??
• ?? UDP de? p??sf??e? µ??a??sµ??? e??????
  s?µf???s?? ap? ???? se ????

7
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

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?fa?µ????

• VideoPhone
• Interactive Game
• ???ed??s?e?? (Video Conferencing)
• TV
• Sports (??d?sfa?????? a???e?)
• ?t?.

9
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

10
?at?????e? ?etaf???? Video Streaming

• Broadcast (one-to-all) Broadcast TV
• Multicast (one-to-many)
• Unicast (one-to-one)
• Real-Time Video Conferencing
• Pre-Encoded

11
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

12
????te?t?????
13
????te?t?????(s??.)

• ?as??? S?stat???
• Video Compression
• S?µp??s? t?? a???st???? ?a? t??e?pt???? s?µ?t??
  µ?s? a??????µ?? s?µp?es??.
• Application-layer QoS control
• ???sa?µ??e? ta t??e?pt??? / a???st??? s?µata
  st?? t?????sa ?at?stas? t?? d??t??? ?a? st??
  apa?t?se?? QoS.
• Congestion control µe??s? packet loss delay
• Error control ße?t??s? t?? p???t?ta?
• Continuous media distribution services
• ?e?t???e? t?? p???t?ta t?? ?pt???? / a???st????
  s?µat?? p?? µetad?dete (network filtering).

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????te?t????? (s??.)

• ?as??? S?stat???
• Streaming Server
• ?pe?e????eta? ta st???e?a p???µ?s?? ??t? ap?
  t??? pe?????sµ??? s???????sµ?? ?p?st????e? t??
  d?a??????? d?ast????t?te? (pause/resume, fast
  forward / backward).
• Media synchronization mechanisms
• ????e?a st?? pa???s?as? t?? ß??te????? µe t??
  ?d?? t??p? ?p?? s????f???e a?????.
• Protocols
• ?a?????? ep????????a µeta?? clients / streaming
  server.

15
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

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???t?????a ??a t? Video Streaming

• Network Layer Protocol
• ?a?????? t?? ßas???? ?p??es?e? d??t??? Network
  Addressing
• Internet protocol (IP)
• Transport Layer Protocol
• ?a?????? t?? ?e?t?????e? ??a t?? µetaf??? t??
  p???µes???? ded?µ???? ap? t?? e??p??et?t? st??
  pa?a??pt?.
• User Datagram Protocol (UDP)
• Transmission Control Protocol (TCP).
• Real-Time Transport Protocol (RTP) p??t?????
  ??a µetaf??? ded?µ???? ?p?st????e? real-time
  applications (Time stamping, Sequence numbering,
  etc.)
• Real-Time Control Protocol (RTCP) p??t????? ??a
  ??e??? (QoS feedback, minimal session control
  information)

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???t?????a ??a t? Video Streaming (s??.)

• Session Control Protocol
• ?a?????e? ta µ???µata d?ad??as?e? e?????? t??
  µetaf???? t?? p???µes???? ded?µ???? ?at? t??
  d????e?a p?? e??a??d??eta? t? session
• Real-Time Streaming Protocol (RTSP)
• session control ??a t?? ß??te???? µ?s?
  d?ad??t???. ???s?µ?p??e?te sta s?st?µata µ?s??
  ???? ??a ?a pa?????? st?? client t?? d??at?t?ta
  ?a e????e? t? streaming media server
  (pause/resume etc.)

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???t?????a ??a t? Video Streaming (s??.)

• ?a s?µp?esµ??a ded?µ??a sp????? se pa??tta ap? t?
  RTP layer
• ?a RTP-packetized streams µetaß?ß????ta? st?
  UDP/TCP layer µet? st? IP layer
• ?a pa??ta IP µetaf????ta? µ?s? d?ad??t??? ?a?
  ft????? st?? pa?a??pt?
• St? control plane, ta RTCP RTSP packets
  p???p?????ta? ap? t? UDP/TCP layer ?a?
  µeta??????ta? st? IP layer ??a µet?d?s? st?
  d?ad??t??.

19
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

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???ß??µata

• Delay ? ?????? µet?d?s?? t?? ???e pa??t?? e??a?
  d?af??et???? gt p??ß??µata st?? epa?ad?µ?????e?a
  t?? ß??te?.
• Losses ?a??ta ?at? t?? µetaf??? t??? ?????ta?
  gt p??ß??µata st?? epa?ad?µ?????e?a t?? ß??te?.
• Bandwidth ?at? t?? µet?d?s? µ?a? ß??te????? de?
  e??a? ?a????sµ??? ?a? sta?e?? t? e???? ?????. gt
  ??? ? ap?st???a? st???e? µe p?? ?????????
  ???µ???, t?te d?µ?????e?te s?µf???s? ?a? ??s?µ?
  pa??t??.

21
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

22
S?et??? ???as?a

• ??p??a ??e??a ??e? ???e? st?? t?µ?a t?? streaming
  video sta as??µata d??t?a
• ?a?at???s? µet????? t?? Video Streaming se
  ep?ped? efa?µ????,ep?ped? d??t??? f?s????
  ep?p?d?? se pe??ß????? as??µat?? d??t???
  pa?ep?st?µ???p????.
• S?????s? ?p?d?s?? WLAN Vs Powerline LANs ??a
  streaming media.

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Video Streaming se ep?ped? efa?µ????,ep?ped?
d??t??? f?s???? ep?p?d?? se pe??ß?????
as??µat?? d??t??? pa?ep?st?µ???p????.

• St???? ??e??a?
• ??? s?µpe??f??eta? t? WLAN ??a t?? p??sa?µ??? t??
  streaming video se ?p?ß?ßasµ??e? s?????e?
  d??t???.
• Single Level Encoding Vs Multi Level Encoding.
• TCP Vs UDP

24
?e??d?????a

• ???a?e?a p?? ???s?µ?p??????a?
• Media Tracker
• S?????e? ta ded?µ??a t?? ep?p?d?? efa?µ???? ??a
  t? ß??te????. (encoding data rate, playout
  bit rate, time buffering, video frame rate, video
  frame lost, video frame skipped, packets lost)
• WRAPI
• S?????e? p????f???e? ??a t? wireless streaming
  client (d??aµ? s?µat??, frame retransmission
  count failures, p????f???e? ??a t? AP).
• Typeperf
• ???a?e?? e?????? ap?d?s??.S?????e? p????f???e?
  ??a t? utilization ?a? p????f???e? ??a t? d??t??
  (data received bitrate,capacity WLAN)

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?e??d?????a (s??)

• ???s?µ?p??????a? 2 ß??te? (1 high motion video,1
  low motion video)µe resolution 352 288, 30 fps,
  2min d????e?a.
• Se ?a?e p???aµa st????a? 2 e?d?se?? ap? t? ???e
  ß??te?
• Single level version (video encoded se 25Mbps)
• Multible level version (11 levels ??d???p???s??)
• ???e ß??te? st????e µe TCP UDP.
• S??????? 45 pe???µata

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?e??d?????a (s??)

• ??p?????a

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?p?te??sµata

• Single Level Encoding Vs Multi Level Encoding
• ??? ? client ß??s?eta? se ?a?? ??s? gt ? a???µ??
  t?? ep?p?d?? ??d???p???s?? de? ep??e??e?.
• ??? ? client ß??s?eta? se ?a?? ??s? t?te t?
  multi-layer encoding pa???e? ?a??te?? ap?d?s?

• G?af??? ?a??stas? Average Application Frame Rate
  ??a Multiple Single Level Encoding
• G?af??? ?a??stas?Coefficient of Variation
  Application Frame Rate ??a Multiple Single
  Level Encoding

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?p?te??sµata (s??)
G?af??? ?a??stas? Average Application
Frame Rate ??a TCP UDP Streams G?af???
?a??stas?Coefficient of Variation Application
Frame Rate ??a TCP UDP Streams

• TCP Streaming Vs UDP Streaming
• G?a ?a??? t?p??es?e? ? ep????? TCP ? UDP
  ep??e??e? ???? t? average frame rate
  coefficient of variation of frame rate
• G?a ?a??? pe?????? t? TCP ??e? ????te?? average
  frame rate. gt ta TCP video streams µp????? ?a
  ep?t???????? ?a??te?? frame rate ??t? ap? ?a???
  s?????e? d??t??? ap? ?t? t? UDP ???? t??
  retransmission.

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?p?te??sµata (s??)

• TCP Streaming Vs UDP Streaming
• Se ?a??? s?????e? d??t???, ?? ????? t?? APs ??a
  downstream a??????ta? p??a p??? µe ap?t??esµa ?a
  ?p???e? ap??e?a pa??t??.
• Se ?a??? s?????e? d??t???, ta UDP streams ?????
  µe???? µ?s? RTT (???s?µ?p???ta? ???? data rate
  ?a? ??µ?se t? playout buffer).

• G?af??? ?a??stas? Network Loss Rate for TCP
  UDP Streams
• G?af??? ?a??stas? Network RoundTrip Times for
  TCP UDP

30
?p?te??sµata (s??)

• TCP Streaming Vs UDP Streaming
• Se ?a??? s?????e? d??t??? ta TCP streams
  ??e?????ta? p??? pe??ss?te?? ????? ??a ?a
  pa??t??? ap? ?t? ta UDP streams. (????
  retransmission)

• G?af??? ?a??stas? Duration of Application
  Playout for TCP UDP Streams

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S?µpe??sµata ??e??a?

• Se ?a??? s?????e? d??t???
• ??a ta video clips ?pa??a? µe high frame rate.
• ? ep????? multi-layer ? single layer encoding ?
  ep????? UDP ? TCP de? ep??e??e? t?? ap?d?s?.
• Se ?a??? s?????e? d??t???
• ?a videos p?? ?ta? ??d???p???µe?a se multi-layer
  p??sa?µ????ta? ?a??te?a ?a? ????? ???? frame rate
• ?a TCP video streams ????? p?? ???? frame rate
  ap? ?t? ta UDP video streams gt ??e?????ta?
  pe??ss?te?? ????? ??a ?a pa?????.

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S?????s? ?p?d?s?? WLAN Vs Powerline LANs ??a
streaming media

• S??p??
• ?e??t? t?? ap?d?s?? t?? WLAN se s??s? µe t? PLC
  LAN.
• S????s? t?? ???s?µ?? throughput st? WLAN PLC
  LAN.
• ????????s? ap? ???ste? t?? p???t?ta? Streaming
  Video p?? pa???eta? ap? t? WLAN ap? t? PLC LAN.

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S?????s? ?p?d?s?? WLAN Vs Powerline LANs ??a
streaming media (s??)

• ???a?e?a
• Stop Watch File Copy
• ?a???e? t?? d??at?t?ta a?t???af??
• a??e??? ap? ??a ???st? se ????
• ?a???a ?????. PLC LAN
• ?? µ??e??? t?? a??e??? ?a? ? ??????
• p?? ??e???eta ??a ?a a?t???af? µa?
• ß???? st?? ?p?????sµ? t?? throughput.
• WLAN

34
?p?te??sµata

• S?????s? t?? ???s?µ?? throughput st? WLAN PLC
  LAN
• Average Throughput PLC LAN WLAN

35
?p?te??sµata (s??.)

• ????????s? p???t?ta? ap? t??? ???ste?.
• ???? ?? ???te? a???????sa? t?? p???t?ta p??
  pa???e? t? PLC LAN ?? ?a??te?? ap? t?? p???t?ta
  t?? WLAN.
• 100 t?? ???st?? e?pa? ?t? ?????? ?a
  pa?a???????s??? ???????? ta???a µe t?? p???t?ta
  p?? pa???e? t? PLC LAN e??,
• 63 t?? ???st?? t?? WLAN ?????? a? d??? ????????
  ta???a µe t?? p???t?ta p?? t??? p??sf??e? t? WLAN.

36
S?µpe??sµata ??e??a?

• PLC LAN ep?t?????e? ????te?? ?a? p?? s??epe??
  ???s?µ? throughput ap? ?t? t? WLAN.
• ? ap?d?s? t?? WLAN e??a? ?e???te?? ap? t? PLC
  LAN.
• St?? a????p??e? d???µ?? ? p???t?ta t?? streaming
  video p?? pa???eta? ap? t? PLC LAN ?ep??ase t??
  p???t?ta p?? pa???eta? ap? t? WLAN.

37
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

38
Ge???? S?µpe??sµata

• ?a as??µata t?p??? d??t?a d?s???e???? t??
  p??sa?µ??? t?? ß??te????? (video streaming) st??
  d??at?t?te? t?? d??t??? ?ta? a?t?? µe?????ta?.
• ?a ß??te??, ta ?p??a ??d???p?????ta? µe
  p???ap???? ???µ??? µet?d?s?? (MBR) µp????? ?a
  a?apa?a????? ?a??te?a st?? p?e??? t?? pe??t? ap?
  ?t? ta ß??te?? µe ap?? ??d???p???s? (SBR) ?a?
  ?d?a?te?a ?ta? ?? s?????e? st? WLAN e??a?
  ?s??µe?.
• ?? TCP fa??eta? ?a e??a? p?? ap?te?esµat??? ap?
  t? UDP sta as??µata t?p??? d??t?a.
• ? te???????a Home Plug 1.0 Powerline Networks
  µp??e? ?a pa??e? s?µa?t??? ???? st?? pa???? t??
  d??t??? p??sßas?? sta sp?t?a ?a? sta ??afe?a.

39
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

40
?e????t??? ???as?a

• ?e??ss?te?? a????s? t?? ap?te?esµ?t??.
• G?a s??p??? s?????s?? ?a µp????saµe ?a t?????µe
  ta ?d?a pe???µata µe ???e? te???????e? ????
  p???µ?s?? RealVideo ?a? Quicktime.
• ???tas? ap?te?esµ?t?? µe d?af??et????
  ??d???p???se?? pe??e??µ????.
• ??e???? pa?aµ?t??? st? AP.
• G?a s??p??? s?????s?? ?a µp????saµe ?a t?????µe
  ta pa??µ??a pe???µata µe ???a e??a?e?a s???????
  stat?st???? (p.? Etherial)
• ???e??a ?ata p?s? t? PLC LAN µp??e? ?a epe?ta?e?
  ??a ?a ?p?st????e? HDTV ?a? SDTV.

41
?e??e??µe?a

• ??sa????
• ?fa?µ????
• ?at?????e? ?et?d?s?? Video Streaming
• ????te?t?????
• ???t?????a ??a t? Video Streaming
• ???ß??µata
• S?et??? ???as?a
• Ge???? S?µpe??sµata
• ?e????t??? ????e?a
• ??af????

42
??af????

• 1 Comparative Performance of Wireless and
  Powerline LANs for Streaming Media, Gent G.P.,
  Downing C., Dalton J. .
• 2 Application, Network and Link Layer
  Measurements of Streaming Video over a Wireless
  Campus Network, Feng Li, Jae Chung, Mingzhe Li,
  Huahui Wu, Mark Claypool, Robert Kinicki.
• 3 Streaming Video over the Internet
  Approaches and Directions, Dapeng Wu, Yiwei
  Thomas Hou, Wenwu Zhu, Ya-Qin Zhang Fellow, Jon
  M. Peha.
• 4 Overview of video transmission services over
  Wireless mobile networks
• 5 Media Streaming performance in a portable
  Wireless Classroom network, Xiaozhen Cao,
  Guangwei Bai, Carey Williamson.
• 6 The effects of Mobility on Wireless Media
  Streaming Performance, Guangwei Bai, Carey
  Williamson

43

• ????S!!