Matt P

I've been reading that some plasma TV's and DLP TV's can produce images at resolutions like 1024x768 (for example). Would 768 lines mean that it cannot display a true 1080 picture? Does this mean that it may ACCEPT a 1080i signal and then "downconvert" it? Are most RPTVs which are "HDTV Ready" capable of truly DISPLAYING 1080i, etc.???

Thanks!

plug it in man!

1024x768 is a better barometer for a cpu resolution.
if the set says it can do 1080i it can. the 1024x768 is a non interlaced number or progressive one. It's not really true for the TV if it could do 480p maybe. Don't sweat the math, get a good signal. You wouldn't want to put your cpu on the TV anyway.If you're really concearned about resolution,get a set that will do 480p or better.

palebluedot

Most of the plasma TVs these days automaticaly convert the resolution of the signal. So for instance if you see a TV that does 1024x768p then it will convert 480p or 1080i to 768p.

Also don't confuse pixel resolution to line resolution.

Matt P

So what is the difference between lines of resolution and pixel resolution as it pertains to both RPTV and, say, plasma TV's?

palebluedot

Lines of resolution are defined by one number referring to vertical resolution.

Pixel resolution is defined by 2 numbers both vertical and horizontal resolution.

Matt P

So, essentially, if a display device has 1024x768 resolution, the highest number of "lines of vertical resolution" it could display is 768 lines - correct?

Why do almost all HD or HD Ready RPTV's have the ability to display in 1080i, while plasma TVs, etc seem mostly limited to 768 lines.? Most of them are 768p, but why not 1080i?

Also, why can't most current HDTV's display in 1080p? Too high a scanrate?

Thanks for all the info!!!!

palebluedot

If a plasma display says it does 1024x768p then it is going to convert a 480i, 480p, 720p and 1080i to 768p...in most cases. The plasma displays are inherently progressive, just like a computer monitor, so it does not have the ability to display a interlaced signal(1080i) it will convert the interlaced signal to a progressive signal.

Also another clairification, pixel resolution is really defined by 3 numbers, the third being color depth. So sometimes you might see 1024x768x16.

As far as 1080p is concerned I just don't think it's been done yet. The initial spec for HDTV was 480p and 1080i. It is possible 1080p and beyond is in the future. Hell I waiting for holographic TV!

skar

BTW, I would consider the picture quality of a 768p signal to equal or surpass the quality of a 1080i signal.

Matt P

Thanks for the great info. This was a big help!

tacomantt

We have in our research department a complete 1080p system. It cost us about $200,000. Getting 1080p source data is EXTREMELY difficult for us. But hey we have it and it's like looking out a window. Cooooooooooll....