VTEL HS 2000, Руководство системного администратора

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HS 2000 System Administrator’s Handbook Chapter 3. Preparing for Videoconferences
Fine-tuning audio and video settings 61
Note:
You can also control the audio level by moving the
volume control slider over the AppsView icon.
Setting audio delay (adjusting lip sync)
During a call, if mouth movements are not in sync with the words the
speaker is saying, the lip sync is not correct.
The HS 2000 system provides audio delay of incoming speech in order to
synchronize with the video, because the video compression process
requires additional time. The compression time varies, depending on the
data rate and the amount of motion. Audio delay is preset to the best value
for each line rate. In unusual circumstances, you may need to adjust the
audio delay.
The Rx (receive) and Tx (transmit) fields indicate the data reception and
transmission rates in milliseconds.
Add 40 milliseconds to the Receive field by moving the button on the
vertical slide bar. Continue to add to the Rx field in 40-millisecond
increments until lip sync is correct.
To help a system administrator at a remote site adjust lip sync, change the
rate in the Tx field.