GIF viewing problems
05-Aug-91 17:57:47
Sb: #10920-GIF viewing problems
Fm: Steve Bennett/SYSOP 76702,1071
To: Syndesis 76004,1763
[Continued from previous message]
the patterns happen to duplicate at 8 bit intervals, which they usually
don't. The variable code size encoding used by GIF allows any and all
repeating bit patterns to compress accordingly. This is much more
effective than the "standard" LZW scheme. It would be difficult to come up
with a better scheme which would still retain 100% of the data. (Huffman
encoding is the only real alternative to the LZ derivitives, and it isn't
anywhere near as effective as the GIF compression has been…)
Sorry to go on a bit about that, but it needed some explaining…
–>Steve Bennett