[opendtv] Re: Technology years
- From: "Albert Manfredi" <bert22306@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 21 Jan 2007 20:13:50 -0500
Bob Miller wrote:
I wouldn't use OFDM for satellite either, what is that about?
You asked what schemes did not use COFDM, and I answered. Let's not turn
this into another religious discussion (as if it hasn't been one long enough
already).
I remember very well the ATM vs Ethernet vs Token Ring wars of the early to
mid 1990s. Most of that was caused by "just enough knowledge to be
dangerous."
Dale Kelly wrote:
ATSC hardware was not up to the task until recently, in
the interim many jumped ship, while still mouthing support
they were in reality "following the money".
This has been part of my aggravation since 2002/2003, when 4th and then 5th
gen designs were announced, tested, AND demoed in the lab and in the field.
I don't know whether this is "recently" or not. To me, in the CE business,
3-4 years is an eternity. The design of workable ATSC receivers has been
available a long time, and by more than one company (Micronas, LG, ATI,
Samsung, ST come to mind).
If people in the business jumped ship by 2002/2003, they simply were not
paying attention, or they jumped ship because someone made it worth their
while to do so. To me, broadcasters in that time frame should have started
getting serious about building this new market.
Another parenthetical point is that some text in ATSC documents
is just policy statements, I believe. Like the business quoted by
John Shutt. To me, those are easily changed with the stroke of a
pen.
Tell that to the CE community.
But the CE community has nothing to say about it, right? The limitation on
how much bit rate can be taken up with E-VSB traffic ONLY applies to prime
time (A/53E Section 5.6.1), and is therefore purely a decision made at the
broadcast end. There's no reason for the CE vendors to police the E-VSB
received rate at certain times of day. That would be ridiculous, IMO.
Furthermore, the table D5.4a of A/53E clearly shows what the E-VSB bit rate
would be with 100 percent E-VSB traffic. So I don't place any importance at
all on that supposed poison pill. It's a big "who cares."
I can tell the ATSC experience has thoroughly frustrated you and others.
Bert
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