Polycom VIEWSTATION Training Manual page 38

End-User Training Guide: ViewStation
G.722
– 7KHz audio-coding at 64 kbps.
G.728
– 3KHz audio compression at 16 kbps (wideband audio).
Half-Duplex Audio
H.320
– Umbrella standard for videoconferencing.
H.221
– The ITU-T standard relating to communications protocol for
videoconferencing.
H.231
– Multipoint for linking three or more H.320 codecs.
H.261
– The ITU-T Px64 standard relating to the video compression
algorithm.
H.230
– The ITU-T standard that defines call control and indication.
H.242
– Call set-up and disconnect of two point videoconferencing.
H.233
– Encryption.
H.243
– Defines call control procedures between H.231 MCU and H.320
codecs.
H.323
– Video over LAN/WAN.
H.324
– Video over POTS.
In-band
– Transmission taking place within allocated bandwidth. For
example, a video call with total of 384 kbps may allocate 64 kbps for audio,
leaving 320 kbps for video.
Integrated Presentation System
in Microsoft® PowerPoint®, can be displayed and presented to the far site
while simultaneously being presented to remote users connected via the
Internet/Intranet.
– Audio that permits only one site to speak at a time.
– Presentations such as those created
VSGi - Polycom ViewStation End-user Training Guide
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