12 X75HD Installation and Operation Manual
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Chapter 1: Introduction
Audio Processing
An X75HD unit can process up to 16-channels (8 stereo channels) of
audio at the same time as the video. Any combination of audio is
assigned from the inputs (four channel analog audio, five AES balanced
or unbalanced, up to four groups demuxed from the SD-SDI and
HD-SDI input) into the 16-channel processor.
The processed audio signals can be mapped to all outputs. When one set
of audio input is selected, these mono channels are mapped intelligently
to provide outputs to all available channels. Audio outputs include the
following: four channel analog audio, five AES balanced and
unbalanced, up to four groups muxed into the SD-SDI and HD-SDI
outputs.
Other M-Path audio processing variations include the following:
• Compressed audio can be de-embedded into an external audio
decoder, then the decompressed multiple channel surround-sound
audio is processed through the X75HD.
• Multiple channel surround-sound audio can be processed, sent to an
external encoder, and then embedded into the video program signal.
All audio can be converted, adjusted, timed, multiplexed, and
de-multiplexed, as required.
Figure 1-7 on page 13 illustrates the audio processing flow.
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