Difference between revisions of "SCI/Specifications/Resource files/Decompression algorithms"
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The decompression algorithms used in SCI are as follows: | The decompression algorithms used in SCI are as follows: | ||
{| border="1" cellspacing="0" cellpadding="5" | |||
{| border="1" | |+ SCI0 compression algorithms | ||
|'''method''' | !'''method''' || '''algorithm''' | ||
|'''algorithm''' | |- | ||
| | |0 || uncompressed | ||
|0 | |- | ||
|uncompressed | |1 || LZW | ||
| | |- | ||
|1 | |2 || HUFFMAN | ||
|LZW | |||
| | |||
|2 | |||
|HUFFMAN | |||
|} | |} | ||
{| border="1" cellspacing="0" cellpadding="5" | |||
|+SCI01 compression algorithms | |||
{| border="1" | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 40: | Line 34: | ||
|} | |} | ||
{| border="1" | |||
{| border="1" cellspacing="0" cellpadding="5" | |||
|+SCI1.0 compression algorithms | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 63: | Line 58: | ||
|} | |} | ||
== SCI1.1 compression algorithms | {| border="1" cellspacing="0" cellpadding="5" | ||
|+SCI1.1 compression algorithms | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 81: | Line 76: | ||
|---- | |---- | ||
|} | |} | ||
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. | 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. | ||
Latest revision as of 09:08, 31 January 2009
Decompression algorithms
The decompression algorithms used in SCI are as follows:
| method | algorithm |
|---|---|
| 0 | uncompressed |
| 1 | LZW |
| 2 | HUFFMAN |
| method | algorithm |
| 0 | uncompressed |
| 1 | LZW |
| 2 | COMP3 |
| 3 | HUFFMAN |
| method | algorithm |
| 0 | uncompressed |
| 1 | LZW |
| 2 | COMP3 |
| 3 | UNKNOWN-0 |
| 4 | UNKNOWN-1 |
| 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.