Decompression algorithms

The decompression algorithms used in SCI are as follows:

SCI0 compression algorithms
method	algorithm
0	uncompressed
1	LZW
2	HUFFMAN

SCI01 compression algorithms
method	algorithm
0	uncompressed
1	LZW
2	COMP3
3	HUFFMAN

SCI1.0 compression algorithms
method	algorithm
0	uncompressed
1	LZW
2	COMP3
3	UNKNOWN-0
4	UNKNOWN-1

SCI1.1 compression algorithms
method	algorithm
0	uncompressed
18	DCL-EXPLODE
19	DCL-EXPLODE
20	DCL-EXPLODE

As reported by Vladimir Gneushev, SCI32 uses STACpack (as described in RFC 1974) explicitly, determining whether there is a need for compression by comparing the size of the compressed data block with that of the uncompressed.