2000.02.01 12:47 "Re: G4 and DCT documentation [was: tiff2ps: G4 compression inPostScript]", by Tom Kacvinsky
Well, good luck finding out whether Adobe has determined it has to be "this way." If I am not mistaken, the problem with DCTDecode filter in Adobe CPSI is this (from GS's gsjmorec.h):
(Was there something about DCTDecode elsewhere in the thread?
If so I missed it...)
No, I sort of hijacked the thread. The point I was trying to make is that I thought (notice past tense) that Adobe hadn't done a good job documenting the DCT filter blocks/MCU, and as such, would not document CCITT filters that well, either.
You're being unfair to Adobe: they spelled this out in their TN 5116, which gives substantial details about their DCTEncode/DCTDecode implementations. I've never rooted through the Various Color Books to see how much of the tech note made it into the books, but it's not as though they never published the info at all...
Thanks for the clarification. You are right, I am being unfair to Adobe...