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How is this High Def??
Sorry, I know this is probably the wrong place to ask this question, but I didn’t know what other forum to ask it in, and since I always come here anyway and am interested in working in High Def in AE (although this really has nothing to do with AE, I just feel the need to know these things), I thought I’d ask you guys.
So anyway, I see all these HDTVs for sale that have resolutions like 1366 x 768, and yet they are 1080i TVs….How can something with only 768 horizontal lines be 1080i?? Wouldn’t you need at least 1080 lines? I understand that they are interlaced and only need half of those lines at a time, but the second set of interlaced lines don’t “paint” on top of the first set, do they? Don’t they skip lines?
Again, I know this is probably the wrong place, but I couldn’t find an HD forum (other than the HDV), and I’m always here at the AE forum…it’s like a second home to me 🙂 Thanks guys.
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8 Replies
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What they mean is that they a accept 1080i signal.
They obviously compress it, amd sell it on the cheap on time for the Superbowl ;).
True 1080i HD sets are still not affordable for most consumers.
Cheers,
Vince
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The truth is that most cable companies probably won’t carry that kind of resolution for a long time. since we all know that quantity comes before quality…
I’d be happy with a 42 inch 720p plasma myself 😉
But it would be nice to have when those blue ray DVD’s come out.
Vince
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I think there exists two HD formats: 720P (1280×720 frames) and 1080i (1920×540 fields) – both roughly 1 000 000 pixels. I think it dates from the early 90’s days of defining HDTV and ABC vs CBS and NBC not agreeing (first one owned by Disney, more emphasis on drama), the two others more interested in sports broadcasting as something to do with HD.
Pierre
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Thanks everyone for your replies to an obviously off topic post. It just seems that every time I learn something I’ve been confused about for a long time, it gives me a sense of satisfaction for about 5 minutes, but then leads me to about 5 other questions…
I guess that’s video for ya.
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[Pierre Jasmin] “720P (1280×720 frames) and 1080i (1920×540 fields)”
1080i should be 1920×1080
Cheers
RoRK
broadcastGEMs
customizable animated backdrops with Adobe After Effects project files -
It’s easy to compose for Standard Def TV (even with all it’s flaws) because we’re just so used to it. I’m wondering about action safe and title safe for all these consumer flat screen HD sets. Anybody have a general rule? 10% action safe for HD?
Sean Meredith
Dante’s Inferno
http://www.dantefilm.com -
there is also a 1080p that is getting market penetration now. same as 1080i except not i.
The problem is there is no “standard” HD format, there are several. The US networks are using a mixture of them, so you either need to get a 1080p (abandon the i if possible) and uprez the 720p footage or get a 720p and downrez the 1080 footage.
At least NTSC had only one resolution.
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Oh yeah, all the 1280×768 or 1330×768 or whatever are not HD, they are resampling them I believe. I would gamble on the 1080p being the winner in this, but you never know.
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