Imagine NEO DVR-3901, Installation And Operation Manual, Page: 75 / 111

DVR-3901 Installation and Operation Manual 59
Chapter 5: Functions and Controls
Using Video Proc Amps
The DVR-3901 has two separate video processing-and-amplifiers
(ProcAmps) built-in, one for the recording path and one for the
playback path. They can be enabled or disabled by parameters
VP_Rec
and VP_Play . Once the parameter is set to Enable, you can control the
luma gain, luma offset, chroma gain, hue, white clip, black clip and
chroma clip level. Use
RecVPStart and PlayVPStart to adjust the
starting line where the video procamp takes effect.
Audio
The DVR-3901 supports one audio channel pair, which can consist of
one stereo pair or two independent audio channels. For convenience,
the first channel is referred to as “Left” and the second channel is
referred to as “Right”.
Audio Inputs
Select between AES or embedded audio at SDI input for the audio
channel pair using the
AudInSrc parameter. The card-edge LED
“AES IN” and the parameter AES_Prsnt indicate the presence of valid
AES audio input. The card-edge LED “EMB AUD IN” and the
parameter
DmxErr show the status of embedded audio at the SDI
input. You can use the parameter DmxDBNCtrl to turn off a data block
number (DBN) error, as some embedder equipment does not generate
DBNs that comply to SMPTE172M. Use the parameters
DmxGrpSel
and DmxChSel to select the desired audio group and channel pair to be
de-embedded. The parameter DmxGrpPres indicates the presence of
different audio groups.
The audio input, either AES or embedded audio, must be in PCM audio
format. If the V-bit is set, as in the case of compressed audio input, the
input audio is muted.
The AES input can be 16, 20, or 24-bit resolution and sampled at
32 kHz, 44.1 kHz, 48 kHz, or 96 kHz. The embedded audio input must
be 20-bit embedded with a 48 kHz sampling rate. Audio recorded onto
disk is 16-bit PCM format, sampled at 48 kHz. For playback audio,
dithering is provided via the
AudDither parameter.