E-Mail: [e-mail]

1
?????? (10)
- ???????????? (3)

• IETF RTSP

2002.06.25
???????? ???? E-Mail katto_at_katto.comm.waseda.ac.
jp
2
?????????

• ???????
• ???????
• ??????
• ??????????

3
?????? (1)

• ???????

????? ?? ???????
???????

• ??????

??????????
????? ??
??????? WWW ????????
???????
4
?????? (2)

• ??????

??????
??????????
????? ??
WWW???
????????
???????
????? ???
cf. CDN (Content Delivery Network)
5
?????? (3)

• ???????

HTTP
????
???????
WWW???
???????????
6
??????? (1)

• HTTP ??????????????????????????

7
??????? (2)

• HTTP ???????

??????
???
HTTP
WWW ???
Web ????
??????
????? ????
???HTTP????????
??????????????????????
8
??????? (3)

• ??????????????????

??????
???
HTTP
Web ????
WWW ???
??????
????? ???
?????
????? ????
?? RTSP / MMS ???? UDP?TCP?IP Multicast?...
???????????
9
?????? (1)

• WWW ?????????????????? (????)

HTTP??????
HTTP???
MIME ???
MIME ???
??????
MIME Multipurpose Internet Mail Extensions
encoding
10
?????? (2)

• ?????????????? (1) ??????

??????
? ??????
Web ????
? ??????
? ???????
? ??????
??????? ????
? ???????
? ???????
????? ???? (.rm)
? ???????
11
?????? (3)

• ?????????????? (2) ??????

??????
? ??????
Web ????
? ??????? (???????)
? ???????
? ???????
??????? ????
????? ???? (.rm)
? ???????
MIME?????????????????????????????
12
?????? (4)

• ?????????? MIME ??????????

??
MIME???
???????
RealSystem
audio/vnd.rn-realmedia rm application/smil
smi smil audio/x-pn-realaudio
ram audio/x-pn/realaudio-plugin rpm
Windows Media Technologies
video/x-ms-wmv wmv audio/x-ms-wma
wma video/x-ms-asf asf asx
??????
Apple QuickTime
video/quicktime mov qt
13
?????????? (1)

• ???????????? (????? ?????)

????????????
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????? ??
???? ??
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2
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1
2
n
n
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14
?????????? (2)

• ???????????????

HTTP ???????
??????
???
????TCP??
????? ????
?????????? ?????????
????????? ?????????? ?????????
??????????????????
??????
???
RTP?????
????? ????
?????????? ?????????
RTP??? ?????????
15
?????????? (3)

• ??????????????

??
??????????
??
RealSystem
rm
??? (?????)
Media Technologies
wmv, wma, asf
??? (?????)
QuickTime
mov, qt
?? (MPEG4)
.rm RealMedia File Format
.asf Advanced Streaming Format
.mp3, .mpg ???????????????
16
???????

• ????????????????????????????

??????????
WWW??? (????)
???? ????? ??
??
??
???
???
???? ??????
N.A.
N.A.
RTSP ?
SMIL ?
RTCP
?? ????
????? ??
???? ??????
RTP
HTTP
UDP (or TCP)
TCP
TCP
IP
IP
17
IETF RTSP
Realtime Streaming Protocol
18
RTSP (1)
?????????????????
RFC 2326
19
RTSP (2) ???????
???
??????
GET
HTTP
??????????? (SMIL?)
DESCRIBE
IP????/??? ???????????? ????????? ???????
SDP
?????? (SDP)
SETUP
RTSP
OK
(??????)
PLAY
OK
(????)
???????
RTP
20
RTSP (3) ??????????
???
??????
???????
PAUSE
VCR???? (??)
OK
(??????????)
PLAY
VCR???? (??)
OK
(??????????)
???????
TEARDOWN
OK
(????????)
21
RTSP (4) ????
Init
TEARDOWN
TEARDOWN
SETUP
PLAY
Play
Ready
PAUSE
TEARDOWN
RECORD
Record
22
RTSP (5) ??
23
RTSP (6) ??
24
RTSP (7) ??
Ethereal ??? RealPlayer ???????
25
????????????
26
???????????????
URL
??????
???
http//www.real.com
RealSystem
??????????
http//www.microsoft.com/windows/windowsmedia/
Windows Media
???????
http//www.apple.com/quicktime/
QuickTime
????
http//www.cisco.com/warp/public/cc/pd/mxsv/
IP/TV
????????
http//www.softwarevision.or.jp/
SoftwareVision
NTT
http//w3-mcgav.kddlabs.co.jp/qm/
QualityMotion
KDDI
http//www2.toshiba.co.jp/mmotion/
MobileMotion
??
http//www.x-zone.canon.co.jp/WebView/
WebView
????
27
RealSystem (1)
????
???
??
??????? ???
RealPlayer
??
???????
RealProducer
RealServer
??
???? ?????
????
RealProxy
RealPlayer
?????????
28
RealSystem (2)
??
??
???????????????
??????????
RealProducer
?? ???, .avi, .mov ?
?? .rm (RealVideo, RealAudio)
???? .smi
???????????
???????ramgen
?????? .ram
??????
????????
RealSystem Server
???? .rm, .smi ?
?? RTSP, PNA
???? RTP, RDT, UDP, TCP, HTTP, IP Multicast
?????????
RealSystem Proxy
?? RTSP, PNA, HTTP
???? RTP, RDT, UDP, TCP, HTTP, IP Multicast
???????
Media Commerce Suite
??
????
RealPlayer
?? .rm, .smi, .avi, .mov, .mpg ?
PNA, RDT ????????????????????
29
RealSystem (3)

• ???????

??????????
WWW??? (????)
???? ????? ??
??
??
???
???
???? ??????
Real Audio
Real Video
RTCP
RTSP
SMIL
.ram
.smi
.rm
RTP / RDT
HTTP
UDP (or TCP)
TCP
TCP
IP
IP
30
RealSystem (4)

• ?????? SureStream

RTSP????????
??????? ???
????
.rm
??????? ????????? ????
TCP????????? ??????????
?????????????? ???????????
??????
31
RealSystem (5)

• ?????? SMIL ? switch ??

HTTP????????
HTTP ???
????
ISDN.rm
????????? ????????
LAN.rm
ltsmilgt ltbodygt ltswitchgt ltref
src"LAN.rm" system-bitrate"150000" /gt
ltref src"ISDN.rm" system-bitrate"45000" /gt
ltref src"modem56.rm" system-bitrate"32000" /gt
ltref src"modem28.rm" system-bitrate"20000"
/gt lt/switchgt lt/bodygt lt/smilgt
???????? ??????????
32
Windows Media (1)
????
???
??
??????? ???
MediaPlayer
??
???????
MediaEncoder
MediaServer
??
???? ????
????
MediaPlayer
33
Windows Media (2)
??
??
???????????????
??????????
Media Encoder ?
?? ???, .avi, .mov ?
?? .wmv, .wma (WM Video, WM Audio), .asf
?????? .asx
???????????
Metafile Creator ? ??????
??????
????????
Media Server
???? .wmv, .wma, .asf ?
?? MMS
???? RTP, UDP, TCP, HTTP, IP Multicast
???????
Media Rights Manager
??
????
Media Player
?? .wmv, .wma, .asf, .avi, .mpg ?
MMS ?????????????????
34
Windows Media (3)

• ???????

??????????
WWW??? (????)
???? ????? ??
??
??
???
???
???? ??????
MS Audio
MS Video
RTCP
MMS
ASX
.asx
.wma .wmv
RTP ?
HTTP
UDP (or TCP)
TCP
TCP
IP
IP
35
Windows Media (4)

• ??????

MS Audio ????MS Video ? MPEG-4 ??????????

• ?????? Intelligent Streaming

?????SureStream ???????

• ASX ??????????????????

ltASX version"3"gt ltEntrygt ltref
HREF"mms//mms_server/sample.wmv" /gt
lt/Entrygt lt/ASXgt
??????????????????????????????
36
QuickTime (1)
????
???
??
??????? ???
QuickTime
??
???????
QuickTime Pro
QuickTime Streaming Server
??
????
????
QuickTime Proxy
QuickTime
37
QuickTime (2)
??
??
???????????????
??????????
QuickTime Pro, Sorenson, Qdesign ?
?? .mov, .qt ?
?? .mov, .qt ?
???? .smi
???????????
??????
?????? .mov (????)
??????
????????
QuickTime Streaming Server
???? .mov, .qt, .smi ?
?? RTSP
???? RTP, UDP, TCP, HTTP, IP Multicast
????
QuickTime Player
?? .mov, .mpg ?
38
QuickTime (3)

• ???????

??????????
WWW??? (????)
???? ????? ??
??
??
???
???
???? ??????
Qdesign Audio
Sorenson Video
RTCP
RTSP
SMIL
.mov
.smi
.mov
RTP
HTTP
UDP (or TCP)
TCP
TCP
IP
IP
????????????????
39
???

• Real, MS, Apple ?????????????

????????????????? Real OS??????????
MS ????????????? Apple (?????)

• ??????????

RTSP?SMIL Real MPEG-4 Video MS MPEG-4 File
Format Apple

• ?????

Windows Media Corona ... FastStream (????)