Choosing A Digital Television Standard -
Posted 11 January 2011 - 10:19 PM
Posted 11 January 2011 - 11:24 PM
However, as the document indicates, either form of modulation can deliver the better reception, depending on the circumstances.
page 2 said:
Posted 12 January 2011 - 04:18 AM
The conclusions are so compelling to the broadcasters and regulators, that ATSC is limited to North America, and South Korea, ISDB is used in South America and the rest of the world uses DVB. Note that ISDB also uses OFDM.
Pity the FCC did not allow the use of DVB-T considering the huge percentage of indoor antennas in the USA. Also consider the reflections from buildings. This was one of the reasons why cable TV took off, is because the reflections caused ghosts of different hues in NTSC. This is very obvious.
Posted 12 January 2011 - 05:03 AM
While at the time DVB showed superior multipath handling developments since in the ATSC arena (stemming from the SFN work performed by internationally respected organisations that alanh calls liars) has largely mittigated ATSCs multipath issues.
Edited by DrP, 12 January 2011 - 05:05 AM.
Posted 12 January 2011 - 08:35 AM
Posted 12 January 2011 - 03:44 PM
We are lucky that we have never had to use a hue control on a TV. The USA have only been relieved of this with DTV.
Spectrum space was not a problem they had 81 RF channels over the years this has been dropped back to 68 channels and again back to 58 and for digital back to 51. However there is no digital transmitter allocations to channels 2 - 6 because of impulse interference.
Cable TV is more about being able to charge for programs rather than providing them to Free to View and paid for by advertising.
Posted 12 January 2011 - 06:09 PM
Edited by MLXXX, 12 January 2011 - 07:29 PM.