720P VS. 1080P
 

On Oct 2, 10:40 pm, "Fred Garvin, Male Prostitute"
wrote:
In glegroups.com, Eddie
G sprach forth the following:

When TV's are listed as 720p I assume they also have 1080i...is this
correct?

How can 1080 lines fit into 720 lines?

Also, if you have 2 TV's side by side, one with 1080i and the other
with 1080p, is there a SIGNIFICANT difference?

Why don't you go to a ****ing store and look for yourself, cretin?

Well, even though I realise a 720p set cannot show 1080i (but can
convert it), technically a 720p set would not have to fit 1080 lines
into 720 it would have to fit 540 into 720 at any one time.

That being said - 720p and 1080p have little difference (as previously
stated) below 42" unless you are sitting quite close to the set.

Fred's advise could be more eloquently stated, but the truth of the
matter is, your best bet is to go check them out if you can (notice I
say IF you can).

Bates....

720P VS. 1080P
 

Bates wrote:
On Oct 2, 10:40 pm, "Fred Garvin, Male Prostitute"
wrote:
In glegroups.com, Eddie
G sprach forth the following:

When TV's are listed as 720p I assume they also have 1080i...is this
correct?
How can 1080 lines fit into 720 lines?

Also, if you have 2 TV's side by side, one with 1080i and the other
with 1080p, is there a SIGNIFICANT difference?
Why don't you go to a ****ing store and look for yourself, cretin?

Well, even though I realise a 720p set cannot show 1080i (but can
convert it), technically a 720p set would not have to fit 1080 lines
into 720 it would have to fit 540 into 720 at any one time.

That being said - 720p and 1080p have little difference (as previously
stated) below 42" unless you are sitting quite close to the set.

Fred's advise could be more eloquently stated, but the truth of the
matter is, your best bet is to go check them out if you can (notice I
say IF you can).

Bates....


Earlier this year I set out to replace an ED
panel that was a proven 'buying error.' So, I
tried my best to make a comparison.

There was no doubt that HD-DVD or Blu-ray
demos in the store were knock-your-socks off
stuff in 1080p and most 1080p sets did a
better job on that content than did the three
720p sets that I viewed.

For practical purposes, this became a
no-brainer as the number of 720p sets in the
marketplace dwindled to zilch when I was
ready to buy.

Off the air, I think the set's processing
power, speed of the display and conversion
algorithms play the major factor in whether
720p or 1080i is the preferable format. Some
folks have hyped pixel shape but I didn't
look at any sets that advertised pixel shape
or shading.

On my new 1080p set, sports broadcasts in
720p seem to be rendered better than are
sports broadcasts in 1080i.

I'd hazard that it will take several years
for the broadcasters to fatten up their
equipment suites to either 720p or 1080i.
(Most HD broadcasts I see have a mixture of
HD and SD sources.) The finances aren't
there to support 1080p production and
broadcast. The financial success or failure
of OTA sub-channel offerings may drive any
spending to offer 1080p either OTA or by
sattelite. (The death of TheTube might be a
harbinger of sub-channel offerings.)

For sure, 1080p will speed the decision in
favor of HD-DVD or Blu-Ray. (Unless Sony
continues to alienate folk.)

--
pete#2

720P VS. 1080P
 

On Tue, 02 Oct 2007 19:27:29 -0700 pete wrote:

| wrote:
| On Wed, 03 Oct 2007 00:37:15 GMT kjw wrote:
|
| | It is important to point out that this depends on the source. Aside
| | from HD-DVD or Blu-Ray, what 1080p content is out there? Any? Take
| | HD broadcasts, for example. They are either 720p or 1080i.
| | Therefore, no, you won't see a difference in this case, other than the
| | quality of the TV.
|
| While apparently no broadcaster has yet done anything other than these 2
| formats, the ATSC standard does define 36 different formats, almost half
| of which would be considered high definition. For example one of the
| unused formats is 1080p24. That would be great for classic film movies.
| I would at least hope TCM (cable/satellite) would go with 1080p24 when
| they go HD. I've noticed a lot of the interviews they do appear to be
| shot in 24 fps while also appearing to be video. So maybe this is their
| plan. Or maybe it's just to give it all a movie feel.
|
| 1080p60 could be done over cable, satellite, or Blu-Ray. It would most
| likely only be used for premium sports channels.
|
|
| JVC DLA-HD100 1080p supports 1080p24, 1080p50
| and 1080p60 at 600 lumens -- bit high priced
| but that might come down

Did you mean 1080p30 when you said 1080p50?

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|

720P VS. 1080P
 

On Wed, 03 Oct 2007 12:44:11 GMT kjw wrote:
| On Wed, 03 Oct 2007 00:37:15 GMT, kjw wrote:
|
|
|
|
| Also, if you have 2 TV's side by side, one with 1080i and the other
| with 1080p, is there a SIGNIFICANT difference?
|
|
|
|
|i'd say so - especially on a larger screen - get to the shops and make your
|own decision.
|
|It is important to point out that this depends on the source. Aside
|from HD-DVD or Blu-Ray, what 1080p content is out there? Any? Take
|HD broadcasts, for example. They are either 720p or 1080i.
|Therefore, no, you won't see a difference in this case, other than the
|quality of the TV.
|
| Wow, re-reading my post, I sounded confrontational, which I didn't
| intend. I really was asking what other 1080p content is out there
| besides HD-DVD and Blu-Ray.
|
| Some people had mentioned other format standards, but does anyone see
| broadcasters using up the bandwidth for 1080p broadcasts in the
| foreseeable future?

Their choices would be 1080p24 and 1080p30, since 1080p60 is not an officially
recognized ATSC format, and it would have to be very highly compressed to get
it to fit in 6 MHz.

IMHO, 1080p24 is a good choice for motion picture films shot at 24 fps. But
it appears broadcasters are not going to change format during the day, and
networks are going with other formats. So this might only happen with an
independent station.

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|

720P VS. 1080P
 

On 03 Oct 2007 02:40:53 GMT Fred Garvin, Male Prostitute wrote:
| In message ps.com, Eddie
| G sprach forth the following:
|
| When TV's are listed as 720p I assume they also have 1080i...is this
| correct?
|
| How can 1080 lines fit into 720 lines?

By mixing and merging. It's called down conversion. It can be really
messy with interlaced. But modern electronics can do it.

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|

720P VS. 1080P
 

On Wed, 03 Oct 2007 21:40:47 -0400 Kimba W Lion kimbawlion wrote:
| Bates wrote:
|
|Well, even though I realise a 720p set cannot show 1080i (but can
|convert it), technically a 720p set would not have to fit 1080 lines
|into 720 it would have to fit 540 into 720 at any one time.
|
| No, it would have to account for all 1080 lines. In interlaced scanning,
| the odd lines are sent first, then the even lines. You have to leave room
| for the next set of lines or you lose half your vertical resolution. You
| can't just display each field of 540 lines as if it's the whole picture.
| If you upscale 540 lines to 720, you'll have much lower resolution than if
| you downscale 1080 lines. I would suppose any set would store one field,
| interleave it with the next field, and display the full frame
| progressively.
|
| Since so many LCDs have a native resolution of 768 vertical pixels,
| there's a lot of scaling going on no matter what the source.

I've always thought that was a silly number to choose for native resolution
on a TV set. At this point I think only small sets would have 768 or less.
But then, I saw a 19" TV with native 1440x900. That's 16:10, not 16:9, so
it appears to be a computer monitor with a tuner added on.

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|

720P VS. 1080P
 

720P VS. 1080P
 

720P VS. 1080P
 

On Thu, 04 Oct 2007 21:50:10 -0700 pete wrote:
| wrote:
| On Tue, 02 Oct 2007 19:27:29 -0700 pete wrote:
|
| | wrote:
| | On Wed, 03 Oct 2007 00:37:15 GMT kjw wrote:
| |
| | | It is important to point out that this depends on the source. Aside
| | | from HD-DVD or Blu-Ray, what 1080p content is out there? Any? Take
| | | HD broadcasts, for example. They are either 720p or 1080i.
| | | Therefore, no, you won't see a difference in this case, other than the
| | | quality of the TV.
| |
| | While apparently no broadcaster has yet done anything other than these 2
| | formats, the ATSC standard does define 36 different formats, almost half
| | of which would be considered high definition. For example one of the
| | unused formats is 1080p24. That would be great for classic film movies.
| | I would at least hope TCM (cable/satellite) would go with 1080p24 when
| | they go HD. I've noticed a lot of the interviews they do appear to be
| | shot in 24 fps while also appearing to be video. So maybe this is their
| | plan. Or maybe it's just to give it all a movie feel.
| |
| | 1080p60 could be done over cable, satellite, or Blu-Ray. It would most
| | likely only be used for premium sports channels.
| |
| |
| | JVC DLA-HD100 1080p supports 1080p24, 1080p50
| | and 1080p60 at 600 lumens -- bit high priced
| | but that might come down
|
| Did you mean 1080p30 when you said 1080p50?
|
| Nope...JVC specs the projector to 24, 50 and
| 60. I think the 50 supports material
| initially formatted for PAL/SECAM (25fps) or
| EDTV (576 line) at 50.

So it has no ATSC tuner? Or it violates ATSC standards? Or it does support
1080p30 without saying so?

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|

720P VS. 1080P
 

On Thu, 04 Oct 2007 21:55:06 -0700 pete wrote:
| wrote:
| On Wed, 03 Oct 2007 21:40:47 -0400 Kimba W Lion kimbawlion wrote:
| | Bates wrote:
| |
| |Well, even though I realise a 720p set cannot show 1080i (but can
| |convert it), technically a 720p set would not have to fit 1080 lines
| |into 720 it would have to fit 540 into 720 at any one time.
| |
| | No, it would have to account for all 1080 lines. In interlaced scanning,
| | the odd lines are sent first, then the even lines. You have to leave room
| | for the next set of lines or you lose half your vertical resolution. You
| | can't just display each field of 540 lines as if it's the whole picture.
| | If you upscale 540 lines to 720, you'll have much lower resolution than if
| | you downscale 1080 lines. I would suppose any set would store one field,
| | interleave it with the next field, and display the full frame
| | progressively.
| |
| | Since so many LCDs have a native resolution of 768 vertical pixels,
| | there's a lot of scaling going on no matter what the source.
|
| I've always thought that was a silly number to choose for native resolution
| on a TV set. At this point I think only small sets would have 768 or less.
| But then, I saw a 19" TV with native 1440x900. That's 16:10, not 16:9, so
| it appears to be a computer monitor with a tuner added on.
|
| Keep in mind though that pixel shape may be a
| consideration. Before VGA, monitor & display
| adapters did not use a square pixel it was a
| 4:3 ratio pixel.

"Before VGA" was a looooooong time ago :-)

FYI, some did do square pixels them, too. But many did not.

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / |
|------------------------------------/-------------------------------------|