GY/T 209-2005.Technical specification for broadband video conference based on time division multiplex digital channel.
1范围
GY/T 209规定了基于时分复用数字信道，采用MPEG-2信源编码,通信速率为2Mbit/s ~ 8Mbit/s的会议电视系统技术规范。
GY/T 209适用于宽带会议电视业务的组网设计、工程实施及相关设备的研制、生产、选型和运行维护。
2规范性引用文件
下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。
GB/T 15845. 4-2003窄 带可视电话系统和终端设备
GB/T 16858-1997远端遥控控制协议
GB/T 17975. 1-2000信息技术 运动图像及其伴音信息的通用编码第1部分:系统
GB/T 17975. 2-2000信息技术运动图像及其伴音信号的通用编码第2部分:视频
GB/T 17975. 3-2002信息技术 运动图像及其伴音信号的通用编码第3部分:音频
ITU-T G. 703 (2001)Physical/electrical characteristics of hierarchical digital interfaces
ITU-T G.704(1998) Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels
ITU-T G. 711(1988) Pulse code modulation (PCM) of voice frequencies
ITU-T G. 722 (1988)7 kHz audio-coding within 64 kbit/s
ITU-T G. 728(1992) Coding of speech at 16 kbit/s using low-delay code excited linear prediction
ITU-T H. 221(1999) Frame structure for a 64 to 1920 kbit/s channel in audiovisual teleservices
ITU-T H. 222.0(2000) Information technology- Generic coding of moving pictures and associated audio information: Systems
ITU-T H. 222.1(1996) Multimedia multiplex and synchronization for audiovi sual communication in ATM environments
ITU-T H.224 (2000)A real time control protocol for simplex appl ications using the H.221 LSD/HSD/MLP channels
ITU-T H.230(1999) Frame-synchronous control and indication signals for audiovi sual systems
ITU-T H. 239 (2003) Role management and additional media channels for H. 300-series

GYIT2092005
Technicalspecificationforbroadbandvideoconferencebasedontimedivisionmultiplexdigital channel2005-09-06
2005-10-01
HTIKAONYKACa-
GYIT2092005
GYIT2092005
CB/T 15845.4-1995
ITUTQ922
HTIKAONYKACa-
ITUTT.120
GB/T15845.4-2003
CB/T16858-1997
CB/T 17975. 1-2000
CB/T17975.2-2000
CB/ T 17975. 3-2002
ITUTG703(2001)
interfaces
I TU T G 704( 1998)
2Mbit/s
GYIT2092005
8Mbit/s
Physical/el ectrical characteristics of hierarchi caldigital
Synchronous frane struct ures used at 1544, 6312, 2048, 8448 and 44736kbit/shierarchi calIevelsITUT G711(1988)
ITUTG722(1988)
ITUT G 728(1992)
predi ction
I TUT H221(1999)
teleservices
Pul se code modul ation (PaM of voi ce frequencies7 kHz audi o-coding wthin 64 kbit/sCodi ng of speech at 16kbit/s using Iowdel ay code excited li nearFrane structure for a 64 to 1920 kbit/s channel in audi ovi sualITuT H 222. O( 2000) Inf ornati on technol ogy--Generi c codi ng of novi ng pi ct ures andassoci ated audi o inf ornation:Syst ensITUT H222.1(1996) Ml timedi a mul tipl ex and synchroni zation for audi ovi sualcommunicationinAtMenvironmentsITUTH224(2000)
Areal tine control protocol for sinmpl ex applications using theH221LSDHSDMLPchannels
ITUTH230(1999)
systens
ITUT H 239(2003)
terminal s
ITUT H242(1999)
Frane-synchronous control andindi cation signal sfor audiovi sualRol e nanagenent and additi onal medi a channel s for H 300-seri esSystemfor
naudi ovisual
establishingcommunication betweentermnal s usi ng di gi tal channel s up to 2 Mbi t/s1
GYIT2092005
I TUT H 243(2000)
Frocedures for est ablishi ng comuni cation bet ween t hree or noreaudi ovisual terminal s usi ng di gital channel s up to 1920 kbit/sI TU T H 261(1993)
I TU T H 263(2005)
I TU T H 281( 1994)
ITUT H 310(1998)
ITUT H 320(2004)
ITUTQ922(1992)
ITUTQ933(2003)
M deo codec for audi ovisual servi ces at p x 64 kbit/sMdeo codi ng for Iowbit rate conmuni cati onAf ar end canera cont rol prot ocol f or vi deoconf erences usi ng H 224Broadband and audi ovi sual communi cati on syst ens and termi nal sNarrowband vi sual tel ephone systens and terminal equi pnentI sDNdat a li nk I ayer specifi cati on for frane node bear er servi cesS gnalling specifications for frane mode switched and pernanentvirtual connection control and st at us noni tori ngITUTT.120(1996)
I TU T T. 122(1998)
I TU T T. 124(1998)
I TU T T. 125(1998)
I TU T T. 126( 1997)
I TU T T. 127(1995)
ITUTT.128(1998)
Dataprotocols for multinedi a conferencingMl tipoi nt conmuni cati on servi ce - Servi ce defi ni ti onGeneri c Conference Control
Mil tipoi nt communi cation servi ce prot ocol specifi cationMl tipoi nt still image and annot ation prot ocolMl tipoint binary file transfer prot ocolMiltipoi nt appli cation sharing1920kbit/s
3840kbit/s
5760kbit/s
7680kbit/s
TYKAONYKACA
I TU T T. 120
GYIT2092005
GYIT2092005
1920kbit/s
2Mbit/s
2Mbit/s
1920kbit/s
3840kbit/s
5760kbit/s
7680kbit/s
8Mbit/s
FTKAONYKACa
CB/ T 17975. 1-2000
4.4.1.31TUTT.120
I TU T T.120
64kbit/s384kbit/s
CB/T17975.1-2000
64kbit/s
SITUTT.120
a)ITUT T.120
2Mbit/s
384kbit/s
GYIT2092005
ITUTT.120
ITUTT.120
I TU T T. 126/ I TU T T. 127/ I TU T T. 128ITUTT.124
ITUTT.122/ITUTT.125
ITUTQ933
1TUTQ922
4ITUTT.120bZxz.net
I TUTT.120
2Mbit/s
8Mbit/s
2Mbit/s
64kbit/s
ITUTH221
CB/ T 17975. 1-2000
GYIT209
21TUTH221
I TUT H 221
I TU T T. 120
MPEG2TS
GB/T17975.1-2000
CB/ T 17975.2-2000
GB/ T 17975.3-2002
CB/T 17975.1-2000
MPEG2TS
64kbit/s
ITUTT.120
ITUT T.120
FTKAONYKACa
ITUT T.120
384k bit/s
I TUT T. 120
ITUTQ922
ITUTH221
I TUT T.120
ITUT H242
ITUTH281
ITU-TH224
ITUTQ922
CB/T17975.1-2000
GYIT2092005
1920kbit/s
ITUTH221
I TU T T. 126/ I TU T
T. 127/ I TU T T. 128
ITUTT.124
ITU T T. 122/ I TU T T. 125
ITUTX224
ITUTQ933
ITUTQ922
ITUTT.120
GYI T 2092005
I TU T H221
I TUTH221
TUTH230
HTIKAONYKACa-
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