Re: The Latest on China and DTV
- From: phil-news-nospam@xxxxxxxx
- Date: 13 Sep 2006 22:58:27 GMT
On Wed, 13 Sep 2006 03:48:11 GMT Bob Miller <bob@xxxxxxxxxx> wrote:
| The Chinese standard is dual with a VSB and a TD-OFDM option. The VSB is
| a much improved version of the US 8-VSB.
|
| Broadcasters, manufacturers of transmitters, chip manufacturers and
| receiver manufacturers can all choose what they want to use. They can
| all decide what is best in a free market. They can all test up the kazoo
| if they want.
|
| The shootout is at hand.
|
| But there will be no shoot out. There is zero support for the VSB
| modulation. The University that fought so hard for VSB has won a Pyhrric
| political victory.
|
| My source tells me that no manufacturer of any kind will build anything
| to do with VSB.
If the manufacturers make the choice to exclude VSB, then how can the
choice by the broadcasters be based on technical merits of VSB vs.
OFDM? We already know most manufacturers (probably all in China)
never use quality as a choice factor.
| He says that VSB was allowed only to settle the argument, that is let
| the market decide.
Or rather, let the manufacturers decide which modulation design gives
them the greatest profit, all other factors being ignored. I cannot
go for that at all.
| Back in 2000 Sinclair Broadcasting asked for the same thing for the US.
| Just allow COFDM and let the market place decide. At that time 8-VSB
| proponents knew that if COFDM was allowed in the US that 8-VSB was finished.
How would that have affected the cost of a mandatory digital tuner,
which if some broadcasters may use one modulation and others use
another modulation would mean the receivers must have both to make
the market choice by broadcasters a genuine choice on the merits of
the modulation itself, rather than simply on which modulation the
manufacturers (which are the most corrupt in this whole mess) happen
to choose?
| After all if 8-VSB was better what threat would COFDM have offered? What
| broadcaster would have chosen COFDM when they already had been working
| with 8-VSB for a number of years?
If all receivers are required to have both modulation types in their
receivers, then I think it would be a fair choice. And if then I saw
broadcasters mostly choosing COFDM then I would believe they had some
valid technical reason for choosing it. But that requirement for both
systems in all receivers _must_ be part of it to make such choices be
of any meaning.
| The simple fact was and is that COFDM based modulations are so far
| superior to VSB that in any free market VSB disappears.
|
| Now we will see it happen in China.
Do all receivers in China have both of their modulations? If not, then
the choice by broadcasters could not be a choice of their own choosing,
but would rather be, a choice by the manufacturers, and not really one
of any value whatsoever (always profit and never quality is the basis of
their choices, and that is not a kind of market choice I like).
--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2006-09-13-1748@xxxxxxxx |
|------------------------------------/-------------------------------------|
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