Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 134)

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Advanced Audio
Dolby
Upgrading Dolby Module Firmware
Firmware for the Dolby modules is included within the Imagestore 750 software. A module’s
firmware will be upgraded automatically during a software update, but only when an update is
required.
Note: Each Dolby module firmware upgrade can take 3–4 minutes to complete. Therefore the
overall software upgrade time could be extended by up to 16 minutes. Please monitor progress
on Imagestore 750’s front panel and do not power down the Imagestore 750 too early. Doing so
may render the Imagestore 750 inoperable.
Throughout the software upgrade, progress is reflected on the Imagestore 750’s front panel. The
panel indicates which software/firmware file is being loaded. For Dolby modules, the filenames
start with the Dolby module’s model number (for example, “Load cat552” or “Load cat559”).
Dolby Front Panel Display Items
The following information relating to Dolby options is available at the front panel:
• Internal metadata sources.
The user-defined metadata preset to be loaded into the internal metadata sources can be
set at the front panel. Choose
Operate > Audio > MD Preset > Processor x , where
x is 1, 2, 3, or 4.
• Audio module status and type.
Use the front panel menu Status > Audio Mod Stat to view the status and type of the
optional audio modules installed. The status of the audio module can be one of the follow-
ing:
The module type shows whether an installed module is a Dolby decoder, a Dolby Digital
encoder, a Dolby E encoder, or an up-mix module.
• Input audio type.
The input status for all 16 channels of the 4 audio feeds and all 16 pairs of the AES inputs is
available from the front panel. (See
Inputs on page 164 for how these are configured.)
Status > Input Status > Audio Feed x > Channel y
Status > Input Status > AES > Pair n (L and R)
The front panel shows whether an input is carrying PCM, Dolby E, Dolby Digital, or non-PCM
and whether the input is unlocked. It shows “
Unknown ” if the signal is locked but unrecog-
nized.
Configuring Dolby
In versions of the Imagestore 750 software prior to v2.0.1, audio configuration was performed
through hand-crafted text-based “mix files.” Although this is still possible, the graphical ‘Audio
Graph’ page of the Imagestore 750 Configurator now makes designing and maintaining audio
configurations much simpler, and is essential for configuring advanced audio modules such as
Module Error The module has an error
Module OK There are no errors for the module
Not Fitted No module is installed
Unknown The module type is unknown