HDTV tuner confusion

On Wed, 18 Mar 2009 11:27:46 -0700, UCLAN wrote:

Wes Newell wrote:

*What* marketing people? I have seen numerous TV specifications that
correctly state that the tuner is: ATSC (8VSB/QAM), NTSC.

And I've seen *many* specs online that list them as ATSC/NTSC/QAM. or
other combos of the 3.

And I explained why in my previous post.

And not all ATSC tuners do QAM.

Never said they did. That's why QAM is mentioned in the spec. 8VSB need
not be mentioned in the tuner spec since it's part of the ATSC spec.

None of this changes the fact that both QAM and 8VSB are modulation
methods used for ATSC, and that QAM is *not* and encoding method. Saying
that ATSC is for over-the-air only is just plain WRONG.

I'm not disagreeing, just that some atsc tuners do not have qam capability
and being so I think it's best that they advertise it's capability
separately. AFAIK, all ATSC tuners do have 8VSB (OTA) capability.



--
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"UCLAN" wrote in message
...
L Alpert wrote:

If you want to receive OTA, QAM is not needed. Most ATSC tuners
are QAM compatible these days, which is good if you subscribe to
cable without their box as so you can pick up HD stations that are
no scrambled (usually the locals), as QAM is the encoding
technology used by the cable companies.

QAM is *NOT* an encoding technology. QAM is a modulation technology
used
on ATSC signals by cable companies to increase bandwidth. OTA uses
8VSB
modulation of ATSC.

Some say potatoes, some say potatoes.

The difference between "encoding" and "modulating" technologies is
*not*
simple pronunciation.

I understand the concepts between modulation and encoding schemes, but
it means little to the layman. All he cares about is does it work.
If you need to be told you are right, so be it, you are right.

Wes Newell wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate 8VSB.
It's in the ATSC specification. A tuner cannot be called an ATSC tuner
if it *can't* demodulate 8VSB.

L Alpert wrote:
"UCLAN" wrote in message
...
L Alpert wrote:

If you want to receive OTA, QAM is not needed. Most ATSC tuners
are QAM compatible these days, which is good if you subscribe to
cable without their box as so you can pick up HD stations that are
no scrambled (usually the locals), as QAM is the encoding
technology used by the cable companies.
QAM is *NOT* an encoding technology. QAM is a modulation technology
used
on ATSC signals by cable companies to increase bandwidth. OTA uses
8VSB
modulation of ATSC.
Some say potatoes, some say potatoes.
The difference between "encoding" and "modulating" technologies is
*not*
simple pronunciation.

I understand the concepts between modulation and encoding schemes, but
it means little to the layman. All he cares about is does it work.
If you need to be told you are right, so be it, you are right.


Copernicus was "right" too, but nobody believed him for, what, 400
years? I wonder if he was angry about it too?

UCLAN wrote:
Wes Newell wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate 8VSB.
It's in the ATSC specification. A tuner cannot be called an ATSC tuner
if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

RickMerrill wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate 8VSB.
It's in the ATSC specification. A tuner cannot be called an ATSC tuner
if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

Except for the use of "AFAIK." Since 8VSB is mandatory (according to the
ATSC spec), "AFAIK" is a very illuminating qualifier.

UCLAN wrote:
RickMerrill wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate 8VSB.
It's in the ATSC specification. A tuner cannot be called an ATSC tuner
if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

Except for the use of "AFAIK." Since 8VSB is mandatory (according to the
ATSC spec), "AFAIK" is a very illuminating qualifier.

Did it cross your mind that he was being humble?

RickMerrill wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate 8VSB.
It's in the ATSC specification. A tuner cannot be called an ATSC tuner
if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

Except for the use of "AFAIK." Since 8VSB is mandatory (according to the
ATSC spec), "AFAIK" is a very illuminating qualifier.

Did it cross your mind that he was being humble?

By leaving the possibility that a non-8VSB compliant ATSC tuner exists? No.
BY DEFINITION, an ATSC tuner is 8VSB compliant.

--
AFAIK, the Sun sets in the west.

On Sat, 21 Mar 2009 22:01:46 -0700, UCLAN wrote:

RickMerrill wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate
8VSB. It's in the ATSC specification. A tuner cannot be called an
ATSC tuner if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

Except for the use of "AFAIK." Since 8VSB is mandatory (according to
the ATSC spec), "AFAIK" is a very illuminating qualifier.

Did it cross your mind that he was being humble?

By leaving the possibility that a non-8VSB compliant ATSC tuner exists?
No. BY DEFINITION, an ATSC tuner is 8VSB compliant.

So then what are QAM cable boxes without 8vsb support? Since QAM is a part
of the ATSC spec, wouldn't that make them ATSC tuners.:-)



--
Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org
My Tivo Experience http://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm
AMD cpu help http://wesnewell.no-ip.com/cpu.php

On Sun, 22 Mar 2009 07:07:43 +0000, Wes Newell wrote:

On Sat, 21 Mar 2009 22:01:46 -0700, UCLAN wrote:

RickMerrill wrote:

AFAIK, all ATSC tuners do have 8VSB (OTA) capability.

As I wrote twice in this thread, ATSC tuners *have* to demodulate
8VSB. It's in the ATSC specification. A tuner cannot be called an
ATSC tuner if it *can't* demodulate 8VSB.

Worse case of Violent Agreement I have seen in a long time!-)

Except for the use of "AFAIK." Since 8VSB is mandatory (according to
the ATSC spec), "AFAIK" is a very illuminating qualifier.

Did it cross your mind that he was being humble?

By leaving the possibility that a non-8VSB compliant ATSC tuner exists?
No. BY DEFINITION, an ATSC tuner is 8VSB compliant.

So then what are QAM cable boxes without 8vsb support? Since QAM is a
part of the ATSC spec, wouldn't that make them ATSC tuners.:-)

BTW, only 16 qam is part of the atsc standard, not 256 qam, which is the
cable standard.



--
Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org
My Tivo Experience http://wesnewell.no-ip.com/tivo.htm
Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm
AMD cpu help http://wesnewell.no-ip.com/cpu.php