|Responsible main contractor: AUDENS ACT|
In the MPEG-2 standard a mechanism for time and clock-synchronisation
between the encoder and decoder of audio/video data is foreseen based
on a so-called PCR (Program reference clock), which is included in the
distribution of a program. This synchronisation method serves the purpose
to avoid buffer over- and underflow at the decoder due to clock drifts
between the encoder and the decoder.
This study analyses the impact of different disturbing effects on the
NCR reception at a user terminal, such as phase noise and Satellite
Doppler, on the reconstruction of network timing and frequency synchronisation.
The network synchronisation performance is determined assuming different
reference points (gateway or satellite) and topologies (one or more
gateways) in the satellite system.
|Copyright AUDENS ACT|