Thompson ViBE EM4000, User Manual

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Appendix A ’Technical Specifications’ — Features
180 ViBE EM4000 — Release 1.10
User Manual — 46073586AB02
Audio, other features
Audio silence alarms
A Detected Silence alarm indicates that the input audio signal value is
below -65 dBFS. The delay for raising the Detected Silence alarm can be
configured from 2 s to 60 s in 2 s increments.
Audio saturation alarms
When the input format is PCM, the audio level is monitored for each
mono channel, and the "saturation" alarm is raised if the Audio level of
one channel reaches 0dBFS for at least 2 successive audio samples.
The saturation alarms can be disabled by the User.
Additional audio delay
In order to compensate a delay on the video or audio path upstream of
the encoder, it is possible to delay the audio with a positive or negative
offset.
The delay can be set by the User from -500 ms to 500 ms in 1 ms steps.
VBI Processing
Time Code (VITC)
The Encoder can extract VITC (defined as per SMPTE RP188-1999) from
the HD SDI input signal according to SMPTE 334M-2002. The Encoder
automatically detects which line the Time Code is on. The extracted VITC
is then included in the encoded video component as a picture timing SEI
message.
Closed Caption
Closed caption, according to EIA 708 and embedded in the HD SDI input
stream according to SMPTE 334M-2002, can be extracted and embedded
in the encoded video stream as a picture timing SEI message (proprietary
specifications).
PVR descriptor
The Encoder supports encoding of data fields in the private data bytes of
the adaptation field according to reference AU information (ETSI
101-154). If this feature is incompatible with some decoders, it can be set
to Off via the Management System.