Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 124)

108
Advanced Audio
Dolby
The Dolby decoding and encoding option add the ability to decode and encode Dolby
according to the following diagram:
Fig. 6-3: Audio Engine and audio processing Dolby modules
Note: The Imagestore 750 can accommodate a total of 4 advanced audio modules (a combina-
tion of Dolby decode, Dolby encode, and up-mix modules).
Dolby Overview
The Imagestore 750 Dolby decoding and encoding options provide an integrated, compact and
flexible “Dolby decode-/encode-capable” 1RU channel branding processor. With Dolby decodes
and encodes being performed within the Imagestore 750, it is possible to mix and cross-fade
between Dolby inputs and apply PCM voice-overs before encoding back to Dolby audio.
The Imagestore 750’s Dolby options provide the following principal features:
• Up to 4 modular Dolby decoders and encoders.
• Dolby data from:
Audio embedded in SDI video.
AES stereo pair(s).
• PCM (baseband, uncompressed) audio to Dolby data conversion.
• Metadata handling:
Metadata A/B switching synchronously with audio A/B mix.
Four RS-485 serial metadata I/O connections.
Custom-defined metadata presets.
Internal configurable metadata sources.
• Audio input status, reporting on the front panel or through SNMP.
PCM, Dolby E, or Dolby Digital.
• Audio type status bits in AES and embedded SDI audio.
‘Audio’ or ‘Non-Audio’.
• Integral video delays provide video delay compensation.
• No additional video reference is required. The existing bi-level or tri-level reference signal is
used.
• The Imagestore 750’s GPIs are available for control.
• Automation commands are available for control.
PVW Video
Audio Processing Engine
A/B
Mix
Voice-
Over
Video A
Video B
PGM Video
AES AES
Video Processing (A/B Mix, Keyers, etc.)
D
olb
y
Module
D
olb
y
Module
D
olb
y
Module
D
olb
y
Module
RS-485 In RS-485 Out