Archiving

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(Archiving only)
(Stream compression formats)
Line 52: Line 52:
 
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.
  
* [[BZIP2]] (.bz2)
+
* [[bz2]] - [[BZIP2]]  
* [[Crunch]] (.?Z?)
+
* [[?Z?]] - [[Crunch]]
* [[GZIP]] (.gz)
+
* [[gz]] - [[GZIP]]  
* [[Error Code Modeler]] (.ecm)
+
* [[ecm]] - [[Error Code Modeler]]  
* [[LZMA]] (.lzma)
+
* [[LZMA]] [[lzma]]
* [[Squeeze/SQ]] (.?Q?)
+
* [[?Q?]] - [[Squeeze/SQ]]  
* [[XZ]] (.xz)
+
* [[XZ]] [[xz]]
* [[CrLZH]] (.?Y?)
+
* [[?Y?]] - [[CrLZH]]
* [[LZIP]] (.lz)
+
* [[lz]] - [[LZIP]]  
* [[LZOP]] (.lzop)
+
* [[LZOP]] [[lzop]]
* [[LZW]] (.Z)
+
* [[Z]] - [[LZW]]  
* [[DEFLATE]] rfc1951
+
* [[DEFLATE]] [[rfc1951]]
 
* [[CCITT Group 4]]
 
* [[CCITT Group 4]]
  

Revision as of 00:42, 20 November 2012

File Formats > Electronic File Formats > Compression

(Lossless, for generic data + file archives)


Compression + archiving

(Multiple files => 1 file, makes it smaller)

Archiving only

(many files => 1 file, no compression attempted)

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.

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