On a hdtv that only does 1080i

[sportage]

Title asks the question. Is 1080i, 1801i regardless of hdmi or rgb?

 

[chucky2]

For video the argument has gone both ways over at avsforum...for text (like websurfing) I'd think HDMI/DVI would be sharper than component.

Chuck

 

[spidey07]

1080i or 1080p via HDMI or RGB/HV is totally dependant on the sources and the display.

There is no universal truth. It all depends on the source and display. Try both to see what you like.

 

[cubby1223]

I have to go with hdmi on this one.

1080i sets are rarely 1920x1080, more commonly they are 1366x768 resolution. My experience says the digital signal looks better when scaled to different resolutions. I'll take hdmi. See for yourself on an lcd monitor, when the video card is set to the native resolution, vga & dvi are indistinguishable. But when set to something other than the native resolution, the dvi looks better.

 

[Shadowknight]

He's not asking for a recommendation on HDMI vs component, he's asking if component does indeed pass the full 1920x1080i resolution, like HDMI. It's a fair question, because you have TVs that advertise themselves as being 1080i (like CRT) that doesn't actually display a 1080i resolution.

 

[Muadib]

Originally posted by: Shadowknight
He's not asking for a recommendation on HDMI vs component, he's asking if component does indeed pass the full 1920x1080i resolution, like HDMI. It's a fair question, because you have TVs that advertise themselves as being 1080i (like CRT) that doesn't actually display a 1080i resolution.

I think you better read the topic summary again. Sounds like he's asking is one better than the other to me. I agree with spidey on this.

 

[M0R0NI]

Originally posted by: spidey07
1080i or 1080p via HDMI or RGB/HV is totally dependant on the sources and the display.

There is no universal truth. It all depends on the source and display. Try both to see what you like.

you have the right idea on this there are just so many variables.

 

[sportage]

Guess I better explain.
My plasma does 1920x1080 1080i.
If I have a rgb source, it says 1920x1080i
With hdmi inputs it also displays in info 1920x1080i

This tv has two hdmi inputs and I really need 3 or 4, so I got a hdmi switch,
but get nothing from it. I went hdmi v1.3 cables thinking it was the cables,
and still the hdmi 4x switch will not pass a sig.

I also tried the terk hdmi switch, and get no sig.
So this tv's hdmi must be real touchy on the hdmi sig it gets, since
I know both switches cant both be bad. Probably they are working fine.
Its just this tv and its hdmi connections.

So, I am now trying the impact 3-play rgb switch going rgb instead of hdmi.
The picture looks the same to me, vs going one device at a time direct hdmi.
The tv still displays 1920x1080 1080i.

So I wondered if thats the best it will do, and if there is really a difference
going rgb 1920x1080i vs hdmi 1920x1080i.

 

[Muadib]

I think you answered your own question sportage. For you using your plasma, and whatever source you were feeding it, there is no difference. What's the model of your tv, and what was your source?

 

[sportage]

maxent mx-5020.
samsung blu-ray, dish hd dvr 622, toshiba hd dvd A3.

 

[PurdueRy]

Originally posted by: sportage
maxent mx-5020.
samsung blu-ray, dish hd dvr 622, toshiba hd dvd A3.

Your TV is a 720p model. Therefore you probably should be using 720p output anyway. This will result in less scaling needed.

However, if you had to pick between HDMI and component then it really depends on the TV. However, since you cannot tell a difference, then why worry about it?

Contrary to the advertising of cable manufacturers the quality of HDMI is typically very similar to that of component when both are calibrated correctly.

 

[TheAdvocate]

There's so much misinformation here.

First of all, your TV is not a "1080i" or a "720p"

Your TV's resolution is 1366x768

The best signal for that is probably 720p, so it will not be scaled as much.

As for pass through, I'd probably go digital/HDMI for the reason cubby said.

I wish people were not allowed to buy these things without understanding what they are buying. Blame the marketing folks.

 

[sportage]

I have tried 720p, and the pict looks poor compared to setting the source to 1080i.

From the manual:

Supported Resolutions for RGB Mode

Horizontal Vertical
Frequency Frequency Dot Rate Vertical Horizontal
Dot x Line (KHz) (Hz) (MHz) Polarity Polarity
720 x 400@70Hz 31.469 70.087 28.322 + -
640 x 480@60Hz 31.469 59.940 25.175 - -
800 x 600@60Hz 37.879 60.317 40.000 + +
1024 x 768@60Hz 48.363 60.004 65.000 - -
1366 x 768@60Hz 47.700 60.000 85.383 - -
1280 x 1024@60Hz 63.981 60.020 108.000 + +
720 x 480p@60Hz 31.469 59.940 27.000 - -
1280 x 720p@60Hz 45.000 60.000 74.250 + +
1920 x 1080i@60Hz 33.750 60.000 74.250 + +

The last, 1920x1080i is what I set the source output to, and with either hdmi or RGB, the tv info displays its doing 1920x1080i. And the picture looks pretty nice, yes its not 1080p, but a nice sharp picture.
Its upscaling to 1080i.

Now I wonder about another issue. When I tried the hdmi switchers, and got no picture or signal coming thru, I wonder if I set the source to 720p, going into the switch, if I would get a sig out to the tv?

I still find it odd I could not get any hdmi switcher to work with this set, my original goal.
I almost got a new 73" dlp 1080p set, but just can't take the limited viewing angle of DLP sets. And can not wall mount DLP either.

 

[Muadib]

It is possible that both switches were bad. Did you try using either of them on another set?