Tom's Hardware > Forum > Home Theatre > HDTV > 720p > 1080i

720p > 1080i

Forum Home Theatre : HDTV - 720p > 1080i

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!
Ask the community Add a reply
Word :    Username :           
 
Anonymous   08-08-2004 at 04:21:21 PM

Archived from groups: alt.tv.tech.hdtv (More info?)

 

How much better does a 720p signal look when converted to 1080i as
compared to when converted to 480p?

Add a reply
Sponsored Links
Register or log in to remove.
Badger   08-08-2004 at 11:51:34 PM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

cg8 wrote:
> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?
It doesn't look better.

Reply to Badger
Anonymous   08-08-2004 at 11:47:13 PM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

cg8 wrote:

> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?
>

IMO, on a display such as a CRT (FP or RPTV)
capable of 1080i, 720p should look noticeably
better converted to 1080i than 480p. You'd be
getting considerably more scan lines with
1080i, each carrying 720p's max resolution
converted to 1920X1080.

On some fixed-pixel displays with limited
matrix formats, the difference may be less
noticeable. 720p sideconverted to 1080i looks
quite good on my CRT-based RPTV, especially
with live 720p sporting events. Most viewers
with sets capable of either 720p or 1080i
(often CRT front projectors) say 720p looks
only slightly better in its native format
than sideconverted to 1080i.
John

Reply to Anonymous
Anonymous   08-09-2004 at 01:02:19 AM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

cgrime01@utopia.poly.edu (cg8) wrote in news:6eed635e.0408080921.18c33e42
@posting.google.com:

> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?

It's a little hard for me to tell, since my sat receiver doesn't actually
do 720p (the earlier versions did), but converts to 1080i or 480p. I
suppose I could experiment with setting the output to 480p on an ABC HD
broadcast....

At first guess, I'd think it would be about twice as good in 1080i. That's
basically the same difference as between a good progressive scan DVD and
1080i.

And twice as good is not as dramatic as you might think. To get a REALLY
dramatic increase you need about a factor of 4. Of course the difference
between SDTV and HDTV is normally a bit more even than that!

--
Dave Oldridge+
ICQ 1800667

A false witness is worse than no witness at all.

Reply to Anonymous
Eric   08-09-2004 at 06:59:12 AM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?

Experimenting with my Pace DC550P STB and a CRT HDTV, I found 720p to look
best when converted to 1080i.
(Regular 480i channels, however, look horrible converted to 1080i --
otherwise I'd just keep the STB set at 1080i.)

Reply to Eric
Anonymous   08-09-2004 at 11:56:10 AM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

It depends on what's doing the conversion and what device is displaying the
picture. Both formats were designed to minimize the issues with
up-converting from 480i/p or cross-converting between HD formats. On my
equipment, 720p converted to 1080i looks MUCH better than 720p converted to
480p. YMMV.
--Brian

"cg8" <cgrime01@utopia.poly.edu> wrote in message
news:6eed635e.0408080921.18c33e42@posting.google.com...
> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?

Reply to Anonymous
curmudgeon   08-09-2004 at 03:04:11 PM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

How long is a piece of string?

"cg8" <cgrime01@utopia.poly.edu> wrote in message
news:6eed635e.0408080921.18c33e42@posting.google.com...
> How much better does a 720p signal look when converted to 1080i as
> compared to when converted to 480p?

Reply to curmudgeon
Richard   08-12-2004 at 02:48:57 AM
- 0 +

Archived from groups: alt.tv.tech.hdtv (More info?)

 

"Curmudgeon" <biteme@nospam.com> wrote in message
news:3DKRc.6046$5i4.1954@bignews3.bellsouth.net...
> How long is a piece of string?
>
> "cg8" <cgrime01@utopia.poly.edu> wrote in message
> news:6eed635e.0408080921.18c33e42@posting.google.com...
>> How much better does a 720p signal look when converted to 1080i as
>> compared to when converted to 480p?
>
These questions are not easy to answer because, in the real world, not all
hardware provides the same results. In theory a 720p "upconverted" to 1080i
should look better on a proper display if the upconversion was done
accurately; no question about it.

Richard.

Reply to Richard
Ask the community Add a reply
Tom's Hardware > Forum > Home Theatre > HDTV > 720p > 1080i
Go to:

There are 645 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.209 seconds
Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
Related Topics
See all relatives topics
Related Content
They won a badge
Join us in greeting them
How do I win badges?