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APM6800
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Installation and Operation Manual
Copyright © 2008-2009, Harris Corporation
Appendix A: Neural Audio Packages
Figure A-2. Neural Audio DownMix Block Diagram
All of the DownMix parameters are located in
parameters appear in the APM6801DM
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D, APM6801DM
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LC
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D, and
APM6801LC
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DM
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D modules.
APM6801MM
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D DTS Neural
®
Surround
™
MultiMerge
The DTS Neural Surround MultiMerge enables broadcasters to transition from
stereo to 5.1 surround sound, providing viewers with a 24/7 surround sound
experience. With MultiMerge inline, 5.1 original content is passed unaffected to
the viewer while original stereo content is upmixed to a 5.1 surround sound
image. This provides the viewer with a consistent surround experience.
The transition between 5.1 and stereo occurs seamlessly without the need of
operator intervention. By offering a 24/7 5.1 signal, AC3 metadata does not
transition between 2/0 and 3/2 mode. This prevents audio clicks, pops, and
dropouts. The process also avoids taking “artistic license” with content by
placing audio exactly where it would be heard in a professional LEDE (Live
End Dead End) listening environment. For example, mono or pan-pot stereo
will image in front of the listener, whereas stereo containing depth information,
or LtRt encoding, will surround the listener.
You can use the MultiMerge in combination with the DTS Neural Surround
DownMix device to pass 5.1 through stereo-only facilities and therefore
eliminate the need for costly master control upgrades.
shows how the MultiMerge takes a two-channel audio source
(stereo, matrix encoded stereo, LtRt or DTS Neural Surround LwRw) and
render a 5.1 multi-channel mix; in combination with taking original
multi-channel content and creating a stereo downmixed signal, depending on
the input configuration and content source used.
5.1
input
Down mix
processing
with
watermarking
2.0
output
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