Digital Satellite Service
Digital Satellite System is the initialism expansion of the DSS digital
direct broadcast satellite (DBS) television become popular in North America, which has led to both DBS and DSS being used interchangeably to refer to all three commonplace digital transmission formats; DSS, DVB-S and 4DTV. Analog DBS services, however, existed prior to DirecTV and were still operational in continental Europe until April 2012.[1]
At the time of DirecTV's launch in 1994, the
Thomson
developed DSS system was used instead.
While functionally similar in DVB-S –
forward error correction
), the transport stream and information tables are entirely different from those of DVB. Also unlike DVB, all DSS receivers are proprietary DirecTV reception units.
DirecTV is now using a modified version of
DirecTV-11[2]
satellites; however, huge numbers of DSS encoded channels still remain. The ACM modulation scheme used by DirecTV prevents regular DVB-S2 demodulators from receiving the signal although the data carried are regular MPEG-4 transport streams.
See also
- direct broadcast satellite
References
- ^ "AnalogueSat". Archived from the original on 2012-12-28. Retrieved 2013-05-25.
- ^ "The DIRECTV Group, Inc. - DIRECTV Remains Clear HD Leader with 130 HD Channels on Tap for Mid-August". Archived from the original on 2008-08-05. Retrieved 2008-08-03.