Ensemble Designs Avenue 7500, Руководство пользователя, Страница: 10 / 44

Data mode signal to be disembedded and output as an AES stream –
This mode requires the use of an audio submodule to disembed the de-seri-
alized SDI input and route the channels to the correct path. If one of the
channels is normal audio, it can be mixed, swapped, shuffled, and delayed
by the audio submodule. If the other channel is non-audio data, it bypass
the normal audio functions and is carried to the AES output formatter and
driver.
When in the Data mode, the AES formatter is driven by the output timing
of the 7500, the original SDI input must be synchronous to the reference
input or the 7500 must be configured to use the SDI signal as the timing
reference.
Data mode signal to be disembedded, output as AES, then re-
embedded
– In this case the audio submodule is also required. This case is
similar to the one above, while the disembedded data is re-embedded in the
HD SDI output of the 7500. The same timing requirements apply.
Original embedded data to be left unchanged with an additional
embedded group to be added
– The original embedding in the HD SDI
input passes through the 7500 processing path. At the same time, an audio
submodule is used to create a second embedded group which is placed in
cascade, following the original audio group which contains the data mode
signal.
A data mode signal in AES format is input to the audio submodule –
This example could be used when there is a need to embed the AES data
into the output of the 7500. In this case the AES data input must be syn-
chronous. When being used in this manner, the audio submodule can embed
data mode AES into one pair of channels in an embedded group, while
embedding conventional audio into the other pair.
• Audio Delay : With the Auto Track switched On, audio will be delayed the same
amount as the video passing through the 7500 frame synchronizer thus preserving
lip sync. If incoming audio is early due to signals passing through an upstream
frame sync without a compensating audio delay, Bulk Delay can be used to correct
the problem. Up to 1000 mS of fixed delay can be added to compensate for
upstream timing errors.
7500-10
Model 7500 HD Video Proc Frame Sync