Modified Huffman - Revision history

Jsummers at 14:27, 20 January 2021

2021-01-20T14:27:24Z

Jsummers at 19:02, 11 November 2015

2015-11-11T19:02:40Z

Jsummers at 20:47, 2 June 2013

2013-06-02T20:47:15Z

Dan Tobias at 16:31, 27 February 2013

2013-02-27T16:31:10Z

Jsummers: /* Specifications */

2013-02-26T18:39:29Z

‎Specifications

Jsummers at 18:33, 26 February 2013

2013-02-26T18:33:24Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression }} '''Modified Huffman''' is a kind of data compression, in which the data is first [[Run-length encoding|run-length en..."

2013-02-26T17:32:57Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Compression }} '''Modified Huffman''' is a kind of data compression, in which the data is first [[Run-length encoding|run-length en..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Compression
}}
'''Modified Huffman''' is a kind of data compression, in which the data is first [[Run-length encoding|run-length encoded]], and then [[Huffman coding]] is applied to the run lengths. This technique is often used to compress bi-level images.

It is used in 1-dimensional [[CCITT Group 3]] compression, for example.

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 |subcat=Compression
 }}
-'''Modified Huffman''', sometimes called '''MH''', is a data compression algorithm used in 1-dimensional [[CCITT Group 3]] to compress bi-level images. The data is first [[Run-length encoding|run-length encoded]], and then [[Huffman coding]] is applied to the run lengths.
+'''Modified Huffman''', sometimes called '''MH''', is a data compression algorithm used in 1-dimensional [[CCITT Group 3]] to compress bi-level images. It uses a combination of [[run-length encoding]], and [[Huffman coding]] with a predefined Huffman code.
 For more information, see [[CCITT Group 3]].
 [[Category:Graphics]]

@@ Line 1: / Line 1: @@
 {{FormatInfo
 |formattype=electronic
-|subcat=Graphics
+|subcat=Compression
 }}
 '''Modified Huffman''', sometimes called '''MH''', is a data compression algorithm used in 1-dimensional [[CCITT Group 3]] to compress bi-level images. The data is first [[Run-length encoding|run-length encoded]], and then [[Huffman coding]] is applied to the run lengths.
-== Specifications ==
+For more information, see [[CCITT Group 3]].
-See [[CCITT Group 3#Specifications|CCITT Group 3]].
 == Editors' notes ==
 It's not clear whether "Modified Huffman" can also refer to the general concept of RLE combined with Huffman coding.
-[[Category:Compression]]
+[[Category:Graphics]]

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 }}
 '''Modified Huffman''', sometimes called '''MH''', is a data compression algorithm used in 1-dimensional [[CCITT Group 3]] to compress bi-level images. The data is first [[Run-length encoding|run-length encoded]], and then [[Huffman coding]] is applied to the run lengths.
 == Specifications ==
 See [[CCITT Group 3#Specifications|CCITT Group 3]].
 [[Category:Compression]]

@@ Line 1: / Line 1: @@
 {{FormatInfo
 |formattype=electronic
-|subcat=Compression
+|subcat=Graphics
 }}
 '''Modified Huffman''', sometimes called '''MH''', is a data compression algorithm used in 1-dimensional [[CCITT Group 3]] to compress bi-level images. The data is first [[Run-length encoding|run-length encoded]], and then [[Huffman coding]] is applied to the run lengths.
@@ Line 9: / Line 9: @@
 == Specifications ==
 See [[CCITT Group 3#Specifications|CCITT Group 3]].

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 == Specifications ==
-* [http://www.itu.int/rec/T-REC-T.4/en ITU-T Recommendation T.4]
+See [[CCITT Group 3#Specifications|CCITT Group 3]].
-* [http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf TIFF 6.0 Specification], Section 10: Modified Huffman Compression