PAR questions
23-Aug-94 00:00:41
Sb: #119762-PAR questions
Fm: John Ellis 72440,3046
To: John Mateer [PolyMedia] 100116,343
John,
I don't think the PAR conforms to 4:2:2 sampling. There is no mention of it in
the literature. It does provide analog component output, but 4:2:2 refers to
the weighted digital sampling frequencies used to digitize the Luminance and
color difference Components (Y,Cb,Cr) of digital component video. The only
system of this type that has 4:2:2 output is the MAX which uses the Illuminator
Pro as its framebuffer. I don't think there is 4:2:2 sampling in the conversion
process of the original image in either system before or after JPEG compression
except through the framebuffer on the MAX.
Which is not the same as true 4:2:2 sampling like on a CCIR 601 compatible
device such as an Abekas.
>>broadcast spec. << I've been around and around on that one too. <g>
My interpretation of "Broadcast Spec" precludes the use of a JPEG compression
scheme. At least at this time. However both systems output a legal NTSC video
signal. (Provided the images have been correctly created.)
Enough technical stuff! 🙂
You say several of the majoring VR authoring systems import 3DS files directly.
What authoring systems are these? Do they render these files directly in real
time? Is the system you're using proprietary? If I wanted to explore this area
of animation creation what package would you suggest?
(My turn for questions. <g>)
>> I'm really amazed by the quality of stuff produced with 3DS… <<
Have you seen the recent Sig 94 Demo tape? There's some extrodinary work on it.
I agree that the render quality of 3DS is superb.
Let me know if you're still interested in the PAR, maybe we can work out
something on the Micropolis.
John