On Wed, 02 Jan 2002 08:42:22 GMT, "Joshcali" wrote:

> I've got some questions about interlacing and DV that I'm
>hoping someone can answer.
> I've been looking into buuying a DV camera, and I've been
>testing the firewire transfer to PC. (using Premiere to capture
>to microsoft DV codec)
> I've tried with a few cameras (sony trv17, elura20mc, and others).
>each time I capture or playback to the computer, I don't see individual
>fields (interlacing) instead the image looks like a combination of the
>2 fields, with no distinguishing between the even and odd fields.
>
> What's the deal?
> does mini-dv just not do a good job of storing the individual fields
>(blurring
>them together for better compression)?
> or is there a better camera that I can try to do this?
> or am I just using the wrong method to transfer to my PC?
>
>If anyone can also post their results (ie. if you see 2 distinc fields, or
>not)
>it would really help.

?????????????
The fields consist of interleaved (alternating) scan
lines, 1/60th second apart. One never "sees" individual
fields, except as an artifact of their time offset
(with motion) when viewed on a progressive-scan
monitor, and then as "comb" edges formed by the
alternate edges displaced in time (invisible on an
interlaced monitor, like a TV...). Depending on the
quality of the codec used to convert D->A for viewing
purposes on the computer, you may or may not see the
comb edges easily (try a frame-grab...) - and with
no motion, you will not see the comb edges at all...