Run Length Encoding: Difference between revisions
From CPCWiki - THE Amstrad CPC encyclopedia!
More actions
No edit summary |
No edit summary |
||
| (One intermediate revision by the same user not shown) | |||
| Line 1: | Line 1: | ||
Run Length Encoding is a very simple form of file | Run Length Encoding is a very simple form of file [[Data Compression|Compression]]. It compresses long sequences of the same byte to an indicator code, byte value, and count. For example, 48 spaces (character code &20) might be encoded as &E9 &30 &20, assuming the indicator code was &E9. | ||
CPC programs to use RLE techniques included: | CPC programs to use RLE techniques included: | ||
| Line 11: | Line 11: | ||
Later compression programs (such as [[Cheese]] and [[Columbia]]) used the more advanced [[LZW]] algorithm. | Later compression programs (such as [[Cheese]] and [[Columbia]]) used the more advanced [[LZW]] algorithm. | ||
[[Category:DATA Storage]] | |||
Latest revision as of 21:47, 8 October 2009
Run Length Encoding is a very simple form of file Compression. It compresses long sequences of the same byte to an indicator code, byte value, and count. For example, 48 spaces (character code &20) might be encoded as &E9 &30 &20, assuming the indicator code was &E9.
CPC programs to use RLE techniques included:
- SQ23
- Crunch by Crown
- Newsweep (CP/M)
- PowerPage (for saved pages)
- Stop Press (for clip art)
- MicroDesign (for all saved graphics)
Later compression programs (such as Cheese and Columbia) used the more advanced LZW algorithm.