TC Electronic DB4 MKII - Manual (Page 61)

UpCon HD and UpCon Plus
English Manual 57
Fig 1.
UpCon Input Routing.
Green* inputs are used for Stereo and LtRt with
Constant Input routing.
Blue* inputs are used for Stereo and LtRt sig-
nals with Alternating Input routing.
In both modes, 5.1 input signals are fed to the
5.1 inputs.
* To see colors, download the PDF version of
this manual from tcelectronic.com
Station Routing
DTV stations handle Loudness and Format con-
trol differently. How much processing is done
at the station, and how much is left to the con-
sumer, varies from station to station, as does the
generation and reliance on metadata.
UpCon does not need metadata to function cor-
rectly, but it can easily be integrated even where
stations take metadata usage to the extreme
(see example 2 in Fig 2). More typical scenarios
are shown in example 1 and 3, where the station
doesn’t spend time and money on more meta-
data handling equipment than necessary. The
advanced detection circuitry in UpCon ensures
consistent operation without the need for meta-
data.
UpCon automatically switches between 24 bit-
transparent bypass and Up-conversion based
on the settings on the Auto page. The algorithm
may also switch between two incoming stereo
signals.
Processing selects between three different up-
conversion and switching modes. The Automa-
tion Processing parameter in combination with
how you route signal to UpCon, defines how the
algorithm operates. Please refer to the first page
of this section for details.
When UpCon is up-converting, the green UpCon
indicator next to the output meters is lit.
UpCon algorithm – auto page
UpCon algorithm – auto page. The green Up-
Con indicator shows up-conversion is currently
active.
Detection Modes
To avoid the need for metadata to control the
switching between formats, UpCon’s detector
makes use of advanced sensing with appropri-
ate hysteresis and timing computations. The De-
tect parameter sets the conditions for engaging
or disengaging up-conversion. The 24 bit, 20 bit
and 16 bit settings enable detection based on
the presence of dither. The -60, -50, -40, -30,
and -20 dB settings enable detection based on
audio level.
When the Main Only mode is selected, the au-
tomation system measures the Center, L and R
Surround inputs. For instance, if Detect is set at
“16 bit”, UpCon reads dither on the C, LSr and
RSr inputs. If dither is available on any of them,
UpCon assumes that a 5.1 signal is available,
and cross-fades into 5.1 bypass.
Note that this automation mode gives priority to
a 5.1 signal, and that outputs are never muted.
When no 5.1 signal is present, up-conversion is
engaged.
When the Aux Priority mode is selected, the au-
tomation system measures the L and R Aux in-
puts. For instance, if Detect is set at “-60 dB”,
UpCon reads the audio signal on the Aux inputs.
If audio is available on any of them, UpCon as-
sumes that a 5.1 signal is not available, and