i & p HD

[admin_exported]

I just want something confirmed thats been bugging me for a while! As there are HD Ready (usually 768 lines) and Full HD (1080 lines) on todays flatscreen LCD and Plasmas + there is 720p, 1080i & 1080p HD material in existenc, what I want to know is if the following assumptions are correct,

1. If an HD ready set scales 1080p down to fit the 768 lines, do all FullHD sets scale every source up to 1080p?

2. Regardless of resolution, are all LCD & plasmas progressive, so will always show 1080i converted to p form?

The reason I ask is twofold, the first being a recollection of there being a Sony set a year or so back, that was 1920x1080 but wasn't FullHD, which I thought wasn't possible. The second reason is my impending plunge into HD, and whether I will need to set all sources to 1080p, or let the tv do the work on whatever is coming in....I suspect the answer is going to be try tham and see???

 

[professorhat]

Okay firstly:
1. Yes and no. All sets scale to their native resolution, so if their native resolution is 1920 x 1080, then this set will scale any source up to that resolution so it fills the TV screen. Some are better than others at this which is why it depends on the equipment you have as to which is the best method of upscaling.
2. I don't think I can ever say yes, all of them are, but certainly most of them are.
On your comment on the Sony, the term Full HD is not actually an official one (as I understand it). HD Ready is a standard which basically guarantees a TV can output a native 720p signal and can also accept (and if necessary downscale) a 1080p signal. Full HD is a new term that manufactures came up with which generally means it can output a native 1080p signal but, because there hasn't been any ratification of this standard, there aren't any guarantees with this as seen with the recent Philips TV saga on these forums.
P.S. - feel free to correct me if I've got anything wrong - this is just my understanding.

 

[Anonymous]

Its just No2 that still puzzles me then, i'm sure there was something in another mag that said it would only show 1080i from a 1080p source, despite being a 1920x1080 native res. An LCD displaying an interlaced image seemed like a contradiction to me!

 

[D.J.KRIME]

AFAIK all Plasma and LCD sets display a PROGRESSIVE image irrespectivly of if the input device is set to a interlaced mode, some set deinterlace better than others, like wise as to regards of the picture resoultion you are viewing allwaysbeing that of the native resolution of your screen so if you have a Full HD screen then you are watching a 1080p image only differing in quality dependant upon the resolution of the incoming signal.

The terms HD READY and FULL HD can sometimes be a tad BENT to suit a manufactures advertising needs but the EICTA definitions can be found here http://www.eicta.org/fileadmin/user_upload/document/EICTA_-_HD_factsheet_logos.pdf tho exactly what each HD TV does with a signals resolution is very dependant upon just how its internal scalers work.

 

[Anonymous]

Unless you are using a Dot to Dot mode on the TV, all of them scale the content to their resolution before displaying it.

It is correct that digital displays must have the entire screen updated every time which makes them inherently progressive. In relation to the third question though, this is independent to the source material. When the first 1920x1080 panels came on the market, quite a few of them did not support 1080P input. ÿ

 

[bigblue235]

As ceenhad says, the issue with the some 1920x1080 sets only displaying 1080i is to do with their inputs.

My own TV for instance, does 1080p over HDMI but not component. So although it's a 1080p screen, and the 360 is capable of 1080p output, my set can't handle it. So I'm stuck with 1080i for 360 or anything else hooked up throught the component sockets.

Hope this helps!

 

[Anonymous]

It not only helps, it basically solves the issue IMO! Thanks for that, I wish it had been explained in the mag I read at the time.