CompuServe Messages

#Letterboxed

    01-May-95 14:25:11
Sb: #167531-#Letterboxed
Fm: John Ellis 72440,3046
To: Martin Doudoroff/KUB 74664,2144
Hi Martin, That was a great overview. And if I may I'd like to follow up on a rather esoteric point but seemingly important. I've used 720×486 as the standard HV scanline for CCIR, which all of my documentation supports, including Abekas and Quantel, as the correct value for CCIR. However, recently I've seen the value you used, 720×480 mentioned on several occassions. My Ill Pro allows me to use both, which is equally interesting. So do you know if there is a reason for using one or the other, or a reason there are two? Looking at your post it would seem that its got to do with being an even ratio but that's just a guess. Technically it could make a difference as YUV is a raw format and it seems that you would have to pad the image with some blank scanlines when transferring to Abekas. I wonder what your take on this is. Thanks, and thanks for posting the "Letterboxed" review, actually my favorite way of viewing wide screen on TV. 🙂 John