Operating the Equipment Locally Audio Menu – MPEG Layer 2
Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder
Page 4-67
ST.RE.E10137.3
Auto Lip Sync Option
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This option controls whether the Encoder automatically adjusts the audio
delay to maintain lip sync with the video. If the Encoder is being controlled
via SNMP by a control system that has auto lip sync functionality, then this
should be set to off.
See the text underneath Table 4.16 on page 4-30 for use of this facility.
Use Minimum Delay
This sets the lowest possible audio delay.
If this option is set to ON, the Auto Lip Sync and Audio Delay options are
unavailable.
Lip Sync Offset Option
This option is only available if the Auto Lip Sync option is set to On. It
allows a fixed delay to be applied to the audio in addition to the auto lip
sync delay.
Table 4.56: Lip Sync Offset Options
Valid Input Range
Description
Min: -50
Max: 50
Lip Sync Offset in milliseconds.
Audio Delay Option
This option is only available if the Auto Lip Sync option is set to Off. It sets
the delay that should be applied to the audio.
Table 4.57: Audio Delay Options
Valid Input Range
Description
Min: 111
Max: 3540
Audio Delay in milliseconds.
Actual Audio Delay
Shows the actual audio delay. It is for status only and cannot be changed.
Clip Level Option
This option is only displayed if the audio source is set to analogue. It
enables the audio clip level to be set. That is, the head room above 0 dBu
prior to the audio being clipped.
NOTE…
The clip levels available depend on the hardware issue of the Encoder.
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To ensure correct lip sync when working with linear or pre-encoded audio, use the option card M2/EOM2/AUDLIN2.
