Full HD v's HD ready

Marty_J

donnajunkie wrote: »

so in that case all hd ready tvs are full hd then? well i am pretty sure all 720 tvs can display 1080i.

They can scale the content to fit on their screens; they don't have 1080 lines of resolution.

donnajunkie

Marty_J wrote: »

They can scale the content to fit on their screens; they don't have 1080 lines of resolution.

i guess that can explain it. although why do ps3s and xbox 360s detect that the tv can display 1080i? even if what you say is correct i still dont believe 1080i is full hd. full hd means the best level of hd available and that is 1080p.

edit.
has anyone seen a tv calling itself full hd and saying it is 1080i but not 1080p?

Marty_J

donnajunkie wrote: »

i guess that can explain it. although why do ps3s and xbox 360s detect that the tv can display 1080i?

I would guess that your TV is not capable of scaling 1080p material, hence your lack of picture.

You're best sticking with 720p over 1080i for your games anyway. More games are in 720p, and progressive scan is probably better than interlaced for video games.

even if what you say is correct i still dont believe 1080i is full hd. full hd means the best level of hd available and that is 1080p.

Well the "Full" part refers to the 1080 lines of resolution, and the "HD" part means it has a higher resolution than standard definition (which for PAL is 576 lines), so I would say that 1080i is Full HD. Whichever way you want to look at it though, it's probably just a semantic argument, not a technical one.

has anyone seen a tv calling itself full hd and saying it is 1080i but not 1080p?

It's less common now, but we used to have a full HD rear projection TV that could only display 1080i - it couldn't even display 720p.

almillar

That's the whole problem that's causing this argument, Full HD does not have an industry standard technical specification. It came about through selling TVs to define the 1080 TVs from the 720 (notice I don't even mention i or p, that depends on the source more often than the screen).
The only real definition that is clear is the 'HD Ready' logo. This requires the set to have at least 1 HDMI input, at at least 720 vertical lines, that's all.

Marty_J

almillar wrote: »

The only real definition that is clear is the 'HD Ready' logo. This requires the set to have at least 1 HDMI input, at at least 720 vertical lines, that's all.

Actually, according to the EICTA, it requires:

1. Display, display engine
• The minimum native resolution of the display (e.g. LCD, PDP) or display engine (e.g. DLP) is 720 physical lines in wide aspect ratio.

2. Video Interfaces
• The display device accepts HD input via:
o Analogue YPbPr1, and
o DVI or HDMI

• HD capable inputs accept the following HD video formats:
o 1280x720 @ 50 and 60Hz progressive (“720p”), and
o 1920x1080 @ 50 and 60Hz interlaced (“1080i”)

• The DVI or HDMI input supports content protection (HDCP)