Difference between revisions of "SCI/Specifications/Resource files/Decompression algorithms"
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(New page: =Decompression algorithms= The decompression algorithms used in SCI are as follows: ==SCI0 compression algorithms== {| border="1" |'''method''' |'''algorithm''' |---- |0 |uncompressed |-...) |
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The decompression algorithms used in SCI are as follows: | The decompression algorithms used in SCI are as follows: | ||
==SCI0 compression algorithms | {| border="1" cellspacing="0" cellpadding="5" | ||
{| border="1" | |+ SCI0 compression algorithms | ||
!'''method''' || '''algorithm''' | |||
|- | |||
|0 || uncompressed | |||
|- | |||
|1 || LZW | |||
|- | |||
|2 || HUFFMAN | |||
|} | |||
{| border="1" cellspacing="0" cellpadding="5" | |||
|+SCI01 compression algorithms | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 15: | Line 27: | ||
|---- | |---- | ||
|2 | |2 | ||
|COMP3 | |||
|---- | |||
|3 | |||
|HUFFMAN | |HUFFMAN | ||
|---- | |---- | ||
| Line 20: | Line 35: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|+SCI1.0 compression algorithms | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 36: | Line 51: | ||
|---- | |---- | ||
|3 | |3 | ||
| | |UNKNOWN-0 | ||
|---- | |||
|4 | |||
|UNKNOWN-1 | |||
|---- | |---- | ||
|} | |} | ||
== | {| border="1" cellspacing="0" cellpadding="5" | ||
|+SCI1.1 compression algorithms | |||
|'''method''' | |'''method''' | ||
|'''algorithm''' | |'''algorithm''' | ||
| Line 49: | Line 66: | ||
|uncompressed | |uncompressed | ||
|---- | |---- | ||
| | |18 | ||
|DCL-EXPLODE | |||
|- | |||
|---- | |---- | ||
| | |19 | ||
| | |DCL-EXPLODE | ||
|---- | |---- | ||
| | |20 | ||
| | |DCL-EXPLODE | ||
|---- | |---- | ||
|} | |} | ||
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.