The present document describes the modulation and channel coding system (denoted the "System" for the purposes of
the present document) for Digital Satellite News Gathering (DSNG) and other contribution applications by satellite.
According to ITU-R Recommendation SNG.770-1 [12], SNG is defined as "Temporary and occasional transmission
with short notice of television or sound for broadcasting purposes, using highly portable or transportable uplink earth
stations...". The equipment should be capable of uplinking the video programme (or programmes) with its associated
sound or sound programme signals. Optionally it should be capable of providing two-way co-ordination
(communication) circuits and data transmission according to EN 301 222 [6]. The equipment should be capable of being
set up and operated by a crew of no more than two people within a reasonably short time. Limited receiving capability
should be available in the uplink terminal to assist in pointing the antenna and to monitor the transmitted signal, where
possible.
Digital television contribution applications by satellite consist of point-to-point or point-to-multipoint transmissions,
connecting fixed or transportable uplink and receiving stations, not intended to be received by the general public.
Although these applications often transmit a single TV service, the Transport Stream multiplex flexibility also allows
multi-programme TV services with associated sound, including commentary sound channels and data services; in this
case multiple service components are Time Division Multiplexed (TDM) on a single digital carrier.
Maximum commonality with EN 300 421 [3] is maintained, such as Transport Stream multiplexing [1], scrambling for
energy dispersal, concatenated error protection strategy based on Reed-Solomon coding, convolutional interleaving and
inner convolutional coding. The baseline System compatibly includes (as a subset) all the tra (...abbreviated)