SEL-1FS1/SEL-2FS1 and SEL-1XD1/SEL-2XD1
Installation and Operation Manual
Installation, Operation, and Specifications
© 2015 Imagine Communications Corp.
Proprietary and Confidential.
Version 2.8 | Page 95
DTS Neural Surround Audio DownMix
The following topics are covered in this section:
•
Overview (on page
95
)
•
DTS Neural Surround Audio DownMix Parameters (on page 96)
Overview
The DTS Neural Surround DownMix enables 5.1 surround sound to be transported through any stereo
infrastructure. The DownMix process is based upon the principle that both natural stereo and 5.1
content are two-dimensional; both contain width and depth spatial attributes.
The DTS Neural Surround DownMix can represent six channels of discreet audio sources in a stereo
DownMix by transforming the sources into pure intensity and coherence encoding. By correcting
overlaps of the signal sources in intensity, time, coherence, polarity, and phase before the six channels
are combined, the DTS Neural Surround DownMix accounts for the problems suffered in traditional
matrix encode systems—such as comb filtering, spatial location distortion, etc.
The proprietary DTS Neural Audio "watermark process" faithfully reproduces surround information
when it is rendered by the DTS Neural Surround UpMix or any LtRt system. In brief, the DTS Neural
Surround DownMix produces a stereo DownMix that accurately represents the original content whether
monitored in mono, stereo, matrix or DTS Neural 5.1 Surround Sound.
The diagram below below shows a DownMix taking a multi-channel audio source. The DownMix creates
two-channel audio source using the DTS Neural Audio approach of embedding a watermark signal within
the stereo audio signal patch. The watermark signal contains spatial and steering positioning
information. The resulting stereo audio signal is also known as LwRw.
Figure 60:
DownMix Block Diagram
