TANDBERG MCU, Руководство пользователя

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TANDBERG MCU Using the MCU
Motion (CIF) will prioritize motion and show up to 30 fps in CIF resolution and
transmit the highest common format, preferably H.263 CIF.
In Voice Switched mode or Continuous Presence 4 mode, with H.264 enabled
and only one conference active, the MCU will prioritize H.264 CIF as the highest
common format.
Video Custom Formats Custom formats such as SIF and VGA resolutions are supported when the
‘Video Custom Format’ is selected. It allows true resolution to be maintained,
rather than being scaled to another format. This is of particular benefit to users of
NTSC and VGA resolutions, ensuring that their images are not scaled to fit with
the PAL standard.
DuoVideo & P+C The MCU supports DuoVideo TF on both ISDN and IP, and Content TM on
ISDN. When unselected, no DuoVideo
TF
or Content
TM
capabilities will be
transmitted.
Audio
Audio Levelling (AGC) Ensures that all participants receive the same audio level from all other
participants, regardless of the levels transmitted.
When selected, the MCU maintains the audio signal level at a fixed value by
attenuating strong signals and amplifying weak signals. Very weak signals, i.e.
noise alone, will not be amplified.
Example: In most conferences, the participants will speak at different levels. As
a result, some of the participants are harder to hear than others. The Audio
Levelling corrects this problem by automatically increasing the microphone
levels when “quiet” or “distant” people speak, and by decreasing the microphone
levels when “louder” people speak.
Telephone Noise Suppression Attenuates the noise which normally is introduced when adding mobile phones
to a conference. The background noise normally heard when the telephone
participant is not speaking will be attenuated.
Allow G.728 The MCU supports high quality audio even on low call rate. On low call rate the
MCU will prioritize G.722.1. Video participants not supporting this, will receive
low quality audio G.728 instead, when ‘Allow G.728’ is selected. To ensure high
quality audio on low call rate, unselect ‘Allow G.728’ and video participants not
able to support G.722.1, will receive G.722 instead.