Nevion AV-HD-XMUX - Manual (Page 5)

AV-HD-XMUX (-T/R) / AV-SD-XMUX (-T/R) Rev. L
nevion.com | 5
1 Product overview
The only difference between the AV-SD-XMUX and the AV-HD-XMUX is that the
latter can also handle HD SDI video.
The rest of the manual will only refer to the AV-HD-XMUX.
The AV-HD-XMUX is a highly integrated audio embedding module in the Flashlink range,
offering simultaneous embedding and de-embedding of four AES3 stereo digital audio
channels from a digital HD or SD serial video signal.
The modules can:

AV-HD-XMUX can handle SD and HD digital uncompressed video.

AV-SD-XMUX can handle SD digital uncompressed video.

De-embed and embed all groups of audio.

Copy or move audio groups without additional delay.
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De-embed 4 AES3 digital audio and non-audio signals.

Embed 4 AES3 digital audio and non-audio signals.
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Apply sample rate converters when needed.
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Apply extra audio delay.
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Swap stereo channels.
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Make mono or sum from stereo signals.
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Have optical laser output.
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Have optical input.
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Transport asynchronous serial data.
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Generate video and audio signals.
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De-glitch correctly synchronized switched video.
The module has two main processing blocks. One processes the video stream and the
packet data, the other processes the audio. The packet processing core forms a group router
which can route embedded audio between groups without any extra delay.
The AV-HD-XMUX audio core is an AES3 audio router. The received embedded audio and
the AES3 inputs are the sources in the router. The embedded output groups and AES3
outputs are the destinations. This feature may also be used to perform stereo channel
swapping.
Four stereo delay lines are also available in the router with a total combined delay of 1.25s.
Audio processing is possible within each stereo output. The channels may be changed
allowing L/R swapping, mono assignment, summing, MS conversion and phase reversal of
one of the signals.
There are two embedding modes.

Non-SRC mode: The AES3 input signals are embedded transparently.

Automatic mode: The module will use sample rate converters when necessary.
Data signals such as Dolby E will always be embedded transparently without using the
sample rate converters.
All embedding and de-embedding is performed with synchronous 48 kHz audio.