[CDG5] Random questions

Max Poliakovski maximumspatium at googlemail.com
Fri Dec 14 10:51:14 AWST 2018


Hi guys,

Good call on the Huffman code. Any chance it could be a well known algo?
>

Our mysterious compression method #3 looks like a variant of Deflate; it's
based on the same principles: matching and reusing of already encoded data
and Huffman coding.

The decompression code includes two copy routines: one for copying data
pointed by a backward distance and another one for copying bits directly
from source to destination. They are controlled by various Huffman codes
implemented as bit-crunching subroutines. There are 15 such subroutines
corresponding to 15 various variable-length coding tables.

As opposite to Deflate, OS9 novel Rez compression doesn't have any headers,
just raw Huffman codes interleaved with plain-text data...
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