standards

H.3xx videoconferencing standards

Anonymous
Friday, January 20, 2012 - 17:15
Videoconferencing
standards
h.3xx
H.323 This is the umbrella standard for IP conferencing. It includes several sub-standards: H.261 defines the mandatory video Coder/Decoder (CODEC)* standard, whereas H.263 and H.264 define optional video CODECs. Similarly G.711 is the mandatory audio CODEC and G.729 one of several audio CODEC options. The complex operation of managing the data streams from the CODEC including calling, establishing a call, and controlling the various component parts i.e. video, audio and data is defined by two standards, H.225 and H.245.
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Networks and standards

Anonymous
Friday, January 20, 2012 - 17:14
Videoconferencing
standards
Dr Syngen Brown of the University of London Computer Centre (ULCC) has made most helpful and detailed comments on the standards. Polycom® is a registered trademark of Polycom in the U.S. and various countries.  A videoconference link requires:
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Videoconferencing standards

Anonymous
Friday, January 20, 2012 - 17:14
Videoconferencing
standards
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The Standards

Iain Emsley
Monday, October 3, 2011 - 12:17
Videoconference
standards
A videoconference link requires: transmitting and receiving equipment at each site for more details see the VTAS guide Videoconferencing Audio and VideoEquipment; an intervening network to carry the signals. In the case of IP based conferences other network related equipment is normally required to establish a connection, namely gatekeepers. The role of these devices is explained fully in the factsheet H323 Videoconferencing Components. The network to be traversed can involve one or more of the following:
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Videoconferencing standards

Iain Emsley
Monday, September 26, 2011 - 15:34
Videoconference
standards
Videoconferencing, in common with most Information Technology (IT) related fields, has its own language, jargon and engineering standards. To the newcomer, the range and number of different standards can be bewildering. Unless the reader has a background in telecommunications most of these standards are unlikely to be familiar and even then only those directly involved with networking/videoconferencing are likely to be completely conversant with them. A basic understanding of the standards
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