5.Surround Phase Control; Coefficient Control; 1.Custom Down Mix Type Control Settings - evertz 7812UDXD Series Manual

6.43.1.5. Surround Phase Control
This control manages whether or not a 90 degree phase shift is applied to the surround channels before
being passed to down-mix matrix. Select 0 degree if no 90-degree phase shift is needed. It is required
that surround channels are 90-degree phase shifted for Dolby Prologic I decoding, but if surround
channels in the 5.1 audio input are already 90-degree phase shifted, then user should select 0 degree to
avoid double 90-degree phase shifting. Normally, the 90 degrees phase shift is applied. The Surround
Phase drop down menu appears as follows:
0 degrees
90 degrees

6.43.2. Coefficient Control

6.43.2.1. Custom Down Mix Type Control Settings
When the Down Mix Type is set to Custom the following equation will be used to generate the down-
mixed audio.
= × +
L ( LR L C
lev
= × +
R ( LR R
lev
Where lfe is controlled by LFE Mixing and LFE Gain,
gain
controlled by Output Scaling Mode and where
specified user coefficients. These custom down-mixing coefficients are controlled using the appropriate
slider bars in the Down Mix Type control section as shown below.
LR
lev
C :
lev
Ls
levL
Rs
levL
Ls
levR
Rs
levR
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
No phase shift is applied to the surround channels before being
passed to down.
A 90 degree phase shift is applied to the surround channels before
being passed to down.
× + × °
C Ls Ls 0 { /
lev levL
× + × °
C C Ls Ls 0 {
lev levR
: Ranges from 1.000 to –1.000 in increments of .001 increments.
Ranges from 1.000 to –1.000 in increments of .001 increments.
: Ranges from 1.000 to –1.000 in increments of .001 increments.
: Ranges from 1.000 to –1.000 in increments of .001 increments.
: Ranges from 1.000 to –1.000 in increments of .001 increments.
: Ranges from 1.000 to –1.000 in increments of .001 increments.
7800/7700 MultiFrame Manual
° + × °
90 } Rs Rs 0 { / 90
levL
° + × °
/ 90 } Rs Rs 0 { / 90
levR
gain is controlled by Output Gain and
LR C Ls
, ,
lev lev levL
Revision 1.1.1
° + × ×
} lfe LFE ) gain
gain
° + × ×
} lfe LFE ) gain
gain
Rs Ls Rs
, , and
levL levR
÷
norm
÷
norm
norm is
are custom
levR
Page - 149