Automation control, Audio description (ad), Up-mix modules – Grass Valley Imagestore 750 v.3.0.1 User Manual
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Advanced Audio
Audio Description (AD)
Metadata Monitoring and Processing
The Imagestore 750 can route metadata from any one of its internal metadata sources. It can use
custom-defined metadata presets to set up the metadata audio channel mode, parameters of
which can then be modified through automation.
Note: There is no support for dynamic processing of metadata parameters contained within
an external Dolby bit-stream.
Custom-Defined Metadata Presets
There are 4 user-defined metadata presets available in the Imagestore 750. The metadata
presets form a complete list of all metadata parameters.
There are 4 internal metadata sources, called “banks” or “processors.” Custom-defined preset
parameters can be loaded into these metadata banks.
The preset metadata parameters are defined in the Imagestore 750 Configurator and transferred
to the Imagestore 750 in a configuration file. After the configuration file is transferred, automa-
tion can then load individual custom-defined preset files into the internal metadata banks.
After a custom-defined preset is loaded into an internal bank, its values can be over-ridden by
subsequent automation commands. This does not affect the original custom-defined preset,
just the values currently in use.
on page 120 gives further information regarding the individual metadata
parameters.
Automation Control
Automation commands can control some aspects of the audio modules and to change internal
metadata source values. The internal sources of metadata are called “banks.” There are 4 avail-
able banks.
The metadata commands are summarized in
Note: For details of the Oxtel automation protocol, see the Automation publications listed
under
Applicable Publications and Tools
Up-Mix Modules
The up-mix function can be placed, with the ‘q0’ automation command, in one of the following
modes:
0 = Passthrough.
1 = Enable.
2 = AutoMD (follow metadata).
3 = AutoMAX
TM
Please see
on page 135 for a description of each mode.
Audio Description (AD)
Audio description refers to additional narration for blind and visually impaired consumers of
visual media including television. It consists of a narrator talking through the television