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Guest
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 Posted:
Sat Nov 12, 2005 3:23 pm Post subject:
Re: Does 1080i mean HDTV? |
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canabana wrote:
| Quote: | i was taking about 1080i is interlaced. 720p is progressive. this means
720p will give 720 lines at one time. 1080i will only give 540 lines at
one time.
So, how does that NOT make it HiDef TV? |
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Guest
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| Posted:
Sat Nov 12, 2005 3:24 pm Post subject:
Re: Does 1080i mean HDTV? |
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stratus46@yahoo.com wrote:
| Quote: | canabana wrote:
ok i made a typo. call what it what ever you want. i suck and spelling
, typing, and grammer.
As far as I know, there are no interlaced capture devices being used in
HD. The pickups whether a video camera or a film scanner, does a
progressive capture, plugs it into memory and then reads it out
'interlaced'. Many of the new display units re-'integrate' the
interlaced image by storing up the lines and displaying in progressive.
My Samsung DLP certainly works that way. Since the movies you go see
are captured at 24 frames/sec, it seems to me that 30 frame progressive
should be a satisfactory image.
Glenn Gundlach
30 frames per second interlaced works too. |
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Tam/WB2TT
Guest
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| Posted:
Sat Nov 12, 2005 8:06 pm Post subject:
Re: Does 1080i mean HDTV? |
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..........................
| Quote: | Since the movies you go see
are captured at 24 frames/sec, it seems to me that 30 frame progressive
should be a satisfactory image.
Glenn Gundlach
If I have my numbers straight, movies (in a theatre) are actually displayed |
at a flicker rate of 72 Hz. Each frame is displayed 3 times in succession.
So, the information changes at a 24 Hz rate.
Tam |
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Matthew Vaughan
Guest
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| Posted:
Sun Nov 13, 2005 5:30 am Post subject:
Re: Does 1080i mean HDTV? |
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"canabana" <lorryd@shaw.ca> wrote in message
news:1131749288.132250.52970@z14g2000cwz.googlegroups.com...
| Quote: | i was taking about 1080i is interlaced. 720p is progressive. this means
720p will give 720 lines at one time. 1080i will only give 540 lines at
one time.
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That is true, but typically interlaced images can have effective vertical
resolution about 60-70% as good as their total number of lines under most
motion situations. On still images, or for much of the time when showing a
movie (originally 24p), the do much better than that, closely approximating
true 1080p (though with a slight amount of flicker/jittery crawliness as
each field refreshes). At the worst they may approximate 540 lines of
vertical resolution, but that's probably not that common a situation, at
least sustained for more than a few frames at a time. |
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ReeferGuy
Guest
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| Posted:
Mon Nov 14, 2005 3:37 am Post subject:
Asking for help can be dangerous |
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720p, 480i, 1080p, 720i, 480p, 1080i, 540?, 72Hz, 24Hz, progressive,
interlaced, SDTV, HDTV, EDTV, composite, component, DVI, HDMI, S-video.
Add to that the misinformation that is given out by all the well-meaning
people out there who really don't know what they're talking about and it
gets a little confusing.
For a guy like me, non-techie, asking for help can be dangerous.
How does one know who is wrong?
By how many posts there are ragging the poor, well-meaning, but
erroneous, idiot!!!
ReeferGuy™
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R Sweeney
Guest
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| Posted:
Mon Nov 14, 2005 5:28 am Post subject:
Re: Asking for help can be dangerous |
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"ReeferGuy" <ReeferGuy@webtv.net> wrote in message
news:22397-4377B226-683@storefull-3278.bay.webtv.net...
720p, 480i, 1080p, 720i, 480p, 1080i, 540?, 72Hz, 24Hz, progressive,
interlaced, SDTV, HDTV, EDTV, composite, component, DVI, HDMI, S-video.
Add to that the misinformation that is given out by all the well-meaning
people out there who really don't know what they're talking about and it
gets a little confusing.
For a guy like me, non-techie, asking for help can be dangerous.
How does one know who is wrong?
By how many posts there are ragging the poor, well-meaning, but
erroneous, idiot!!!
thus the eternal problem of the internet...
separating the nuts who falsely claim to have been abducted by aliens from
the people who really have been abducted |
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