> ...Here I refer back to the EBU report, which I believe Adam has a link > to on his site(www.adamwilt.com). In some areas the DVCPRO did better > and in others the BetaSX did better. Unfortunately I did not post the BetaSX results on my site, only the DV-format related results. The entire PDF of the EBU report may be downloaded at http://www.smpte.org/engr/ebumeet1.html or at http://www.ebu.ch/pmc_es_tf.html. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html
> When I digitise from the VHS video recorder to the camera, will I then > convert from 768 x 576 (4:3) Pal to 720 x 576 (5:4) DV Pal ? > > Will the material then look distorted when I play back from the camera ? > does anyone know why PAL DV ratio is 5:4 (720*576) > where as most PAL TV's and projectors are 4:3? > Don't we lose this way part of the image? The 768x576 ratio assumes square pixels. PAL DV (and any other PAL 601-based digital format) uses non-square pixels that are slightly wider than they are tall. Thus the picture made with 720x576 601-shaped pixels *will* be an undistorted 4:3 astec ratio. However, if you export a still image on your computer (and in many NLEs, just look at the video clip on the computer's screen) using the computer's square pixels, it will look a bit taller than it should for the width. Use Photoshop or another image processing application to resize the image to 768x576, 720x540, or similar 4:3 ratio for display using square pixels. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html
In amongst all the theorizing, all I can say is that I have never had a problem playing back Canon XL1 or GL1 tapes on either the Sony VX1000 camcorder or DHR-1000 VTR. I have even been able to play back Canon tapes that, for some still unknown reason, would not play back properly on the Canon XL1 that recorded them, a JVC GR-DV1u, or an AJ-D650 DVCPRO VTR. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html
