Compression
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A stream format takes a stream of bytes, and outputs a different, hopefully smaller, stream of bytes. These compression formats are often used internally in other data structures to compress data, as well as in network protocols, such as http. Used stand-alone, a stream compression format does not offer archiving capability, however in the UNIX doctrine, an archiver like [[tar]] can be combined with an archive format to produce a proper compressed archive. | A stream format takes a stream of bytes, and outputs a different, hopefully smaller, stream of bytes. These compression formats are often used internally in other data structures to compress data, as well as in network protocols, such as http. Used stand-alone, a stream compression format does not offer archiving capability, however in the UNIX doctrine, an archiver like [[tar]] can be combined with an archive format to produce a proper compressed archive. | ||
| + | |||
| + | == Compression schemes used in multiple formats == | ||
| + | |||
| + | * [[Huffman encoding]] | ||
| + | * [[LZW]] | ||
| + | |||
| + | == Specific formats/programs == | ||
* [[9CDR]] (Amiga FileImploder Clone) | * [[9CDR]] (Amiga FileImploder Clone) | ||
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* [[LZMA]] (.lzma) | * [[LZMA]] (.lzma) | ||
* [[LZOP]] (.lzop) | * [[LZOP]] (.lzop) | ||
| − | |||
* [[pack]] (.z) | * [[pack]] (.z) | ||
* [[Softdisk Text Compressor]] (.ctx) | * [[Softdisk Text Compressor]] (.ctx) | ||
Revision as of 13:58, 18 December 2012
Contents |
Stream compression formats
A stream format takes a stream of bytes, and outputs a different, hopefully smaller, stream of bytes. These compression formats are often used internally in other data structures to compress data, as well as in network protocols, such as http. Used stand-alone, a stream compression format does not offer archiving capability, however in the UNIX doctrine, an archiver like tar can be combined with an archive format to produce a proper compressed archive.
Compression schemes used in multiple formats
Specific formats/programs
- 9CDR (Amiga FileImploder Clone)
- bzip2 (.bz2)
- CCITT Group 4
- CrLZH (.?y?)
- CRN (.crn) - compressed text files used for PC-Write manual
- Crunch (.?z?)
- DiskDoubler
- DUPA (Amiga FileImploder Clone)
- Error Code Modeler (.ecm)
- File Imploder (Amiga) (.imp)
- gzip (.gz)
- LZIP (.lz)
- LZMA (.lzma)
- LZOP (.lzop)
- pack (.z)
- Softdisk Text Compressor (.ctx)
- Squash - single file compression on RISC OS
- Squeeze/SQ (.?q?)
- XZ (.xz)
See also
- Archiving (for formats that place multiple files together in one file, with or without compression)
