SCI/Specifications/Resource files/Decompression algorithms
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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.