Nevion AAV-HD-DMUX - Manual (Page 6)

AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 7
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extracted from the video signal. All the packed data is sent to the group router. The de-
embedded audio is sent to the stereo audio cross-point router.
The audio processing is performed on the stereo router outputs.
Four of the router outputs are connected to the four stereo delay lines. The outputs of the
delay lines are connected to four inputs of the stereo audio router.
The audio signal is delayed by a few samples during de-embedding, re-packeting the audio
and audio processing. Signals that pass through the stereo audio router will be delayed by a
small number of samples. The group router outputs from the de-embedders do not introduce
any additional delay as the audio does not require unpacking and re-packing.
The embedder core embeds either re-packeted audio from the stereo router or the existing
de-embedded audio as configured in the group router.
The embedded audio packets are inserted into the video signal together with the control
packets and any other packets that were present in the original video signal. The video is
serialized and output through the cable and laser drivers.
The audio signals are taken from the outputs of the audio router. Outputs 1&2 are sent to the
audio DACs (digital to analog converters) while output 3&4 are sent to the AES outputs 3&4.
AES outputs 1&2 are extra AES outputs which may be fed with the audio data of either
outputs 1&2 or 3&4.
1.3 Data signal
The data signal is transported using the User bits in one of the embedded audio streams.
De- embedded data is output on the RS485 output and data received at the R422 input is
embedded into the output video. The configuration sets the audio source containing the data
signal to de-embed, the data format to be received on the backplane connector and which
output signal to embed data into.