Service manual

Application examples
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Application examples
Distribution The S
TELLAR
can be used for distribution to analog VHF/UHF transmitters and to
cable head-ends. The decoder includes high-quality composite outputs with VBI sup-
port, and features VITS and GCR insertion, dedicated to analog feeds. The MP@ML
is the typical choice for this application, and it allows the stream to be used for simul-
cast of digital TV. 4:2:2P@ML provides increased quality overhead and allows trans-
mission of anti-PAL signals, but the delay is higher.
Contribution The 4:2:2P@ML offers high quality video with sufficient overhead for processing,
such as chroma-keying. Encoding rates up to 50 Mbit/s are supported. The decoder
includes features dedicated to professional contribution applications, such as gen-
lock, linear audio, and VBI support for both composite and SDI signals.
DSNG The S
TELLAR
is suited for digital satellite news gathering (DSNG) and related tempo-
rary contribution applications, such as live coverage of large events. The interfaces of
the STELLAR
, its support of both 525 and 625 line systems, and its power supply
allow world-wide operation.
You may take advantage of the S
ATURN
encoder's ability to reduce the end-to-end
delay in those live coverage applications where this is a critical parameter. Consult
the S
ATURN
encoder manual for further information.
Transcoding video and
audio formats
With composite and/or SDI video interfaces installed, the unit supports transcoding
between the component and composite domains. A 270 Mbit/s 625-lines SDI video
input signal at the encoder may be output at the S
TELLAR
as a composite PAL signal.
Note! Conversion between 625-lines and 525-lines systems is not possible.
The following table shows the transcoding possibilities from SDI to Composite
video.
The following table shows the transcoding possibilities from Composite to SDI
video.
SDI input Composite output
Video system 625 lines at 50 Hz PAL system B, G, H I
Video system 525 lines at 60 Hz NTSC system M, PAL system M
LTC VITC
Composite input SDI output
PAL system B, G, H I Video system 625 lines at 50 Hz
NTSC system M Video system 525 lines at 60 Hz