Re: 680k Pixel MiniDV w/340K Effective Pixels for a MiniDV Camcorder
- From: allr1@xxxxxxxxx
- Date: Thu, 29 Sep 2005 17:13:51 -0400
PTravel wrote:
" miniDV resolution is 720 x 480 pixels (NTSC) for a total of 345,600
pixels, i.e. approx. 340k.
^^================================^^
The info I found on the JVC camcorder said that the video resolution is
640 x 480. That
may be the resolution of what the tape can record and not the camcorder
itself.
I have a Hi-8 camcorder now, but if I use it for shooting video of
anything that's farther than
50' away (w/o zoom) the subject is very grainy and hard to see. (what's
recorded on tape)
I'm hoping that miniDV's better resolution will be able to handle
objects that are farther away.
PTravel wrote:
" Camcorders that have higher density sensors usually use them for still
imaging. Some (but, generally, not bottom-of-the-line machines) can do
pixel subsampling, i.e. using the additional pixels to "average,"
producing a slightly better image. "
^^================================^^
Yes, the info on the JVC said Image resolution (still, as opposed to
video) is 1024 x 768.
It also mentions that the JVC uses a 'super high-band processor that
restores the high-band components of the luminance signal to ensure a
crisp picture with 520 lines of resolution' for video.
PTravel wrote:
" Resolution is a different issue that is not necessarily related to the
number of pixels on the sensor. Hi8 was capable of around 400-450 lines
per inch. MiniDV, in theory, is capable of up to 525 lines per inch. In
practice, however, you will not reach those kinds of resolutions which
cheap consumer equipment. Maximum resolution is a function of optics and
electronics, as well as sensors. A 340k sensor machine, theoretically,
could reach 525 lines, but a cheapie consumer model almost certainly
won't -- I've heard of some consumer camcorders that resolve as little
as 275 lines, which puts them in VHS territory. "
^^===============================^^
Well it looks like 340K effective for video is normal for a low-end
miniDV camcorder.
2 more question come to mind:
1) What video resolution is considered 'broadcast quality'?
2) Does miniDV and Hi-8 tape record video at less resolution than the
camcorder is capable of? (I've recorded the Hi-8 camcorder's signal
directly into a DVD recorder and it seems to yield a better picture than
what plays back on the Hi-8 tape)
.
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