720P 0r 1080i for my Hitachi 61swx12b

[David]

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

Hi guys, I'm installing my 921 today and I wanted to ask how I should
set it up. I have an hitachi 61swx12b TV. I see 1080i or 720P for wide
screen viewing.. I believe I heard that 720P is better than 1080i.

 

[curmudgeon]

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

If your set's a rear projection with crt's, you can only display 1080i for
HD. Plasma and LCD sets max resolution is usually 720p.
And 720p is not better than 1080i. Multiply 1080 x 1920 and 720 x
1280....which one gives the highest number?!


"David" <XXlaserman@direcpc.com> wrote in message
news:1100359951.Tlo5+Z1QlNCBkJt6ZsMSzQ@teranews...
> Hi guys, I'm installing my 921 today and I wanted to ask how I should
> set it up. I have an hitachi 61swx12b TV. I see 1080i or 720P for wide
> screen viewing.. I believe I heard that 720P is better than 1080i.

 

[Guest]

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

curmudgeon wrote:
> If your set's a rear projection with crt's, you can only display 1080i for
> HD. Plasma and LCD sets max resolution is usually 720p.
> And 720p is not better than 1080i. Multiply 1080 x 1920 and 720 x
> 1280....which one gives the highest number?!


Overly simplistic answer. 720p means progressive update rate of 60
frames per second, while 1080i has higher resolution but an interlaced
update rate of 60 frames per second where the entire picture is only
updated at a 30 fps rate. Which is better has been hotly debated for
over 10 years dating back to when they were testing to select which
broadcast standards to pick for HD TV. The effect of the interlacing is
to reduce effective resolution for moving images. The short answer is
that 720p is regarded as better for sports or fast motion scenes shot
with progressive video cameras while 1080i has higher resolution which
looks better for still or slow moving scenes. So ABC, Fox, and ESPN are
broadcasting 720p while the other networks have selected 1080i.

For the Hitachi, if it an CRT RPTV, yes, 1080i may be the only choice.
However, the best answer for those with fixed pixel displays is to
experiment with it if that is possible, try out both 720p and 1080i as
the output to the TV and see which one looks better. It may depend on
which network you are looking at.

Alan

 

[Guest]

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

I noticed the signal coming in from my cable box is 1080i. Is this set by
the cable company or is there a way I can set it to 720P? Also, I thought
DVD's were in this range as well, but when I play a movie on DVDP it shows
in 480P. It's a couple of years old, are the newer once better?


"Alan Figgatt" <afiggatt@comcast.net> wrote in message
news8CdnS51qubt6ArcRVn-jw@comcast.com...
> curmudgeon wrote:
> > If your set's a rear projection with crt's, you can only display 1080i
for
> > HD. Plasma and LCD sets max resolution is usually 720p.
> > And 720p is not better than 1080i. Multiply 1080 x 1920 and 720
x
> > 1280....which one gives the highest number?!
>
>
> Overly simplistic answer. 720p means progressive update rate of 60
> frames per second, while 1080i has higher resolution but an interlaced
> update rate of 60 frames per second where the entire picture is only
> updated at a 30 fps rate. Which is better has been hotly debated for
> over 10 years dating back to when they were testing to select which
> broadcast standards to pick for HD TV. The effect of the interlacing is
> to reduce effective resolution for moving images. The short answer is
> that 720p is regarded as better for sports or fast motion scenes shot
> with progressive video cameras while 1080i has higher resolution which
> looks better for still or slow moving scenes. So ABC, Fox, and ESPN are
> broadcasting 720p while the other networks have selected 1080i.
>
> For the Hitachi, if it an CRT RPTV, yes, 1080i may be the only choice.
> However, the best answer for those with fixed pixel displays is to
> experiment with it if that is possible, try out both 720p and 1080i as
> the output to the TV and see which one looks better. It may depend on
> which network you are looking at.
>
> Alan

 

[Guest]

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

Jack Dotson wrote:

> I noticed the signal coming in from my cable box is 1080i. Is this set by
> the cable company or is there a way I can set it to 720P? Also, I thought
> DVD's were in this range as well, but when I play a movie on DVDP it shows
> in 480P. It's a couple of years old, are the newer once better?

Check the manual for your cable box. If your cable company did not
supply one, try a google search for one. A number of people have posted
PDF copies of the various cable box manuals on the net.

The resolution of DVDs are 480 x 720 pixels. Your DVD is putting out
progressive scan 480p (which is good). There are DVD players which
upconvert the output to 720p or 1080i for digital input to your TV, but
source is still 480 x 720. The upconversion may present a better picture
on your TV depending on which - TV or DVD player - does a better job of
scaling the video. For HD movies or shows on disk, that is why they are
developing the competing formats of Blue Ray (BD) and HD DVDs which will
presumably support 720p, 1080i, and 1080p output.

Alan

 

[Guest]

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

> Overly simplistic answer. 720p means progressive update rate of 60 frames
> per second, while 1080i has higher resolution but an interlaced update
> rate of 60 frames per second where the entire picture is only updated at a
> 30 fps rate. Which is better has been hotly debated for over 10 years
> dating back to when they were testing to select which broadcast standards
> to pick for HD TV. The effect of the interlacing is to reduce effective
> resolution for moving images. The short answer is that 720p is regarded as
> better for sports or fast motion scenes shot with progressive video
> cameras while 1080i has higher resolution which looks better for still or
> slow moving scenes. So ABC, Fox, and ESPN are broadcasting 720p while the
> other networks have selected 1080i.

PMFJI, but you said the networks transmit in 720p. Does that mean I need to
change my cable box settings to 720p, or if it is set to 1080i will it
automatically switch to 720p based on the broadcast? I have the Comcast hd
box.

Eddie G