Looking closer into the "interlace mess", here's a revision of my earlier observation about the "tracking graphics" opening shot. Even though the interlacing is messed up (more below), I'm now thinking the tracking shot was a deliberate, film-time extension technique to save expense. They used the interlacing concept to generate more screen time with less labor. If the multiple
ghost images were the result of true
telecine, the
ghosted figures would show on alternate scanlines. Instead, the apparent scanlines are actually part of the graphics, not
real scanlines, and the tracking graphic
ghosts always follow one-another on the same "scanlines".
Regardless, the interlace is messed up, but I've seen it before (more on that later). Normally, it should be a clean process when
telecining 4 frames of actual
film at
24fps into 5 frames of
video at
30fps . .
This should be the present state of the
GITS Original Movie. It should have clean alternate scanlines that correspond to the frames of the above chart. When
inversion-telecined to correspond to the chart below (
note: duplicate fields generated to create the extra frame above, are discarded below), the source image should return to it's clean self, as if it had never been altered . .
So the first thing to do was examine a sequence of 5 frames. According the the chart, the
1st,
2nd, and
5th frames-fields should be the same as in the original frames, while the
3rd and
4th frames-fields are composed of various fields. BTW, the organization of the pictures below is a thumbnail of the interlaced frame, followed by a thumbnail of the even field and it's cropped but full-size self, followed by the same thing for the odd field ... for all 5 frames.) . .
GITS Original Movie - frame 1 :
GITS Original Movie - frame 2 :
GITS Original Movie - frame 3 :
GITS Original Movie - frame 4 :
GITS Original Movie - frame 5 :
As you can see, only the fields of frames 3 and 4 (see the edges of
Major Kusanagi's white vest) have double images from the camera-tilt-down. I've seen this sort of thing before and guessed it was from older optical telecine equipment. As the film ran through it, the scan caught the fields out of sync (from timing adjustments?). On that example, I saw that only half the field was cross-contaminated by another field image, to give it that double exposure. This must happen when scanning film to professional video tape, indicating that the
DVD (
interlaced,
30fps) was made from such tape.
There is a fix for it. Way back when, I worked up a proof-of-concept for that problem and left it at that. It was simplicity itself -- inverting and superimposing only that half of the contaminating field onto the field to be fixed and done! Oh, it did require restoring the brightness/contrast of the finished field to compensate for the flattening effect of superimposition.