Re: 1080p30 vs 1080p60

dipumisc@xxxxxxxxxxx wrote:
Hi

Does 1080p60 deliver a better viewing experience than 1080p30? I have
looked around in the newsgroups. Most of the discussions focus on
interlace vs progressive. But with progressive video, is there a
significant(?) difference between 30 or 60 frames per second? Even if
we assume that the source was recorded at 60 fps, can the human eye
( and brain) distinguish any motion related difference between 30 fps
and 60 fps? Old technologies like CRT needed higher refresh rate to
avoid brightness flicker. Newer technologies like LCD or Plasma should
not have that problem.

Is 1080p60 just a marketing hype? I have even heard of 1080p120. What
am I missing?

-Dipu

What are your video sources for 30p, besides maybe a computer? Movies
and TV shows shot on film in the US are shot at 24 frames per second or
24p. Video cameras for SD and 1080i HD are 60i except for 720p at 60p
(yes, this is simplified answer).

The human eye and brain can detect a difference between a 30 frames
per second and 60 frames per second update, which is why 60i is the
prevalent video standard (and 50i for PAL systems). 60i does NOT equal
30p. Movies have long been shot at 24 fps, which create this "movie"
look that people are used to. So we now have HD video cameras that shoot
at 1080/24p to get that movie feel.

1080/120p is presumably the 120 Hz refresh rate pushed for some LCD
screen to get rid of judder from 24p sources and to eliminate motion
smear. Except for some specialized equipment or PCs, you won't see 120p
video sources.

Alan F




.

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