Audio Processing Features - Imagine communications Platinum PM-FR-5 Installation And Operation Manual

Audio Processing Features

The following audio functionality is supported per SDI channel
De-embedding 4 groups (16 mono channels) of Audio prior to the Frame/Audio
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Synchronizer
Embedding 4 groups (16 mono channels) of Audio after the Frame/Audio Synchronizer.
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Sample Rate Conversion
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Audio Synchronizer
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Audio Delay (up to 3000ms / mono channel)
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Audio Proc (Gain, Mute, Invert)
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Audio Sum (on a per mono-channel basis, but based on a pre-defined list of Sums)
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Audio Swap (on a per mono-channel basis, but based on a pre-defined list of Swaps)
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Audio Test Tone Generator (Off, 400Hz, 2kHz, 4kHz)
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Quiet Audio Transitions
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switched upstream
Audio Processing Notes and Restrictions
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The de-embedded, sample rate converted and processed audio data of all 8 SDI channels is
provided to the audio crosspoint for distribution.
Audio Order of Operations
1 Insert Tone (if enabled)
2 Polarity Reversal and Level Adjust
3 Sum
4 Swap/Copy
5 Mute (if enabled)
and a frame's worth of non-PCM data is dropped or repeated - together with the
active video content every time the Video Frame Synchronizer drops or repeats a
frame.
(with bypass capability on a per stereo-pair basis)
when two sources of same data- and frame-rate are
De-embedding: For De-embedding, audio must be embedded synchronously at a
sample rate of 48kHz.
Embedded Dolby-E frames must be properly aligned with the Video frame in
order to be transferred from the Frame Synchronizer's input clock domain into the
output clock domain. Proper alignment (position of guard-band) is important since
Dolby-E frames can be dropped or repeated alongside the active video content.
Embedded Audio: All embedded Audio is embedded synchronously at a sample
rate of 48kHz
TDMed Audio data (all 128 mono channels) will have a sample rate of 48kHz and
will be in the same Audio clock domain, locked to the applied Video Reference
SMPTE 372M (Dual link): Only the 16 audio channels de-embedded from Link A
will be processed, re-embedded into the Link A of the outgoing SDI stream and
sent via TDM to the ATDM Crosspoint for further routing.
Also see Word Length, ADS
Installation, Configuration, and Operation Manual
Clean, and Group Active Channels
Platinum Frames and Modules 179