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Sirius 800 Series User Manual
9.19.1.1 Frame/Line Sync and Video Delay
The video processing block can be used for frame/line sync or video delay on a channel by
channel basis but they cannot both be used on the same channel.
Note:
The video channel is selected using the dialup panel. The Frame Sync/Delay screen displays
the currently detected video standard for the selected channel.
The configuration buttons at the top of the screen are used to configure the general behavior
of the video channel.
The Summary tab displays all of the possible video standards and whether they are
configured for frame sync or delay. The signal standard is auto detected and the channel uses
the settings defined in the appropriate Frame sync or Delay tab for that standard.
Function
Channel Configuration (Applies to all video standards)
Detected Standard:
Summary button
Frame Sync Enabled
Audio Selection
Table 28
Iss 5 Rev 7
5919 Sirius 800 Video AHP Input Module with Delay and Sync
Video Frame Synchronization is achieved by dropping or repeating video frames when the
Frame Buffer is empty or full.
Selecting audio post synchronization means that when a video frame is dropped or
repeated a frame of audio will also be dropped or repeated.
Selecting audio pre synchronization means that when a video frame is dropped or
repeated the audio will not be dropped or repeated so will no longer be associated with the
original video frame resulting in lip sync mismatch.
Therefore SAM recommends that the synchronizers are used to re-time video in
synchronous systems only.
Figure 99 Example Workbench Frame Sync/Delay Summary Screen
Frame Sync/Delay Summary Screen
Function Description
Displays the detected video standard for the selected video
channel.
Click on the Summary button to return to the summary screen
Check the box to enable frame/line sync on the selected video
channel.
Select the embedded audio from before or after the frame sync
block by clicking on the required option.
Page 145
Input Rear Panels and Input
© 2017 SAM
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