interlacing artifacts

[hptschupp]

I shot some 1080i sample clips today with the HDR-FX1. On clip produced some line zigzag artifacts when moving the camera.

I found that the VLC player has a Video Option to "Deinterlace". I used
>linear and all the zigzag disappeard.

Can somebody give me some background data on this issue?

The clip can be downloaded in a m2t file at http://www.audiovisuelconcepts.com/m2t/HDR-FX1.0001.m2t

[Sigmund]

very short story: on old tv systems the video is transmitted odd lines first then even lines. This, given old tv-screens long fallbacktime, gives better quality than sending all lines in the correct order and rather have half the framerate. Could of course be other reasons as well.

[frenchkiss]

it's also better for temporal resolution than having a half framerate non-interlaced picture, because the framerate on TV shows is really 50 fps for PAL (or 59.94 for NTSC) the TV shows are not shot at 25 fps and then interlaced...