[opendtv] Re: Micronas Delivers World's Smallest Digital TV Demodulator
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 17 Jan 2007 07:04:37 -0500
At 8:22 PM -0800 1/16/07, Dale Kelly wrote:
As has often been pointed out to on this list to the point of adnauseam, the
reception problem in England is and was, largely caused by the very low DTV
transmitter power assigned by the government. However, COFDM fortunately has
the capability to rescale and operate reliably under such conditions and,
after their transition, the power will be raised significantly and with
that, the performance level will be rescaled upward. In the interim, their
system is doing very well commercially and the transition is progressing
very well, thank you.
Dale is 100% correct.
Once again Bert is trying to twist the facts.
OnDigital used 64 QAM to increase the number of channels available -
this was dictated by a subscription business model that was competing
with the BSkyB DBS system. They knew that this would limit the
ability to receive the transmission in some areas where the power
levels were not sufficient. They still signed up millions of
subscribers.
OnDigital failed because of bad business decisions - it had NOTHING
to do with the technology.
When Freeview was created the decision was made to sacrifice some
channel capacity to improve robustness, and thus the number of
potential homes that could be served. The transmitters simply started
using a different mode of the standard, and NONE of the installed
receivers broke.
As Dale correctly points out, the UK can use 64QAM again when the
power level can be raised at the end of the transition. Nothing will
break.
By comparison, efforts to utilize extensions to the ATSC standard,
such as A-VSB, will only work with new products - legacy receivers
will not be able to utilize these bits.
And Bert's ATSC receiver(s) will become boat anchors.
Regards
Craig
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