CRC-32 - Revision history

Jsummers: /* Specific algorithms */

2024-10-12T15:09:01Z

‎Specific algorithms

Jsummers: Guessing this was deleted by mistake?

2024-10-06T19:54:07Z

Guessing this was deleted by mistake?

Jon Daniel at 13:59, 6 October 2024

2024-10-06T13:59:04Z

Jsummers at 13:05, 4 April 2023

2023-04-04T13:05:46Z

Jsummers: Redesigned the article

2021-01-14T16:32:37Z

Redesigned the article

Jsummers: /* Links */

2014-01-04T17:49:15Z

‎Links

Jsummers at 16:12, 21 April 2013

2013-04-21T16:12:42Z

Jsummers: Created page with "{{FormatInfo |subcat=Error detection and correction }} '''CRC-32''' is a family of 32-bit hash functions used to detect accidental data corruption. The term ''CRC-32'' by its..."

2013-04-21T16:06:54Z

Created page with "{{FormatInfo |subcat=Error detection and correction }} '''CRC-32''' is a family of 32-bit hash functions used to detect accidental data corruption. The term ''CRC-32'' by its..."

New page

{{FormatInfo
|subcat=Error detection and correction
}}
'''CRC-32''' is a family of 32-bit hash functions used to detect accidental data corruption.

The term ''CRC-32'' by itself usually means the IEEE CRC-32 algorithm. Other members of the CRC-32 family include CRC-32Q, CRC-32C (Castagnoli), and CRC-32K (Koopman).

== Specifications ==
* [http://www.itu.int/rec/T-REC-V.42/en ITU-T Rec. V.42] Section 8.1.1.6.2 (IEEE CRC-32)

== Software ==
* [http://rosettacode.org/wiki/CRC-32 Rosetta Code: CRC-32]

There seems to be no widely available Unix utility that computes a standard CRC-32. The POSIX '''cksum''' utility does ''not'' use the standard CRC-32 algorithm.

== Links ==
* [[Wikipedia:Cyclic redundancy check|Wikipedia: Cyclic redundancy check]]

@@ Line 10: / Line 10: @@
 == Specific algorithms ==
-Selected CRC-32 algorithms are listed here. The names are from the CRC RevEng Catalogue.
+Selected CRC-32 algorithms are listed here. The names are from the CRC RevEng Catalogue, when possible.
 === CRC-32/ISO-HDLC ===
@@ Line 32: / Line 32: @@
 === CRC-32/MPEG-2 ===
-[https://crccalc.com/?crc=123456789&method=CRC-32/MPEG-2&datatype=0&outtype=0 Online CRC-8 CRC-16 CRC-32 Calculator]
+* [https://reveng.sourceforge.io/crc-catalogue/17plus.htm#crc.cat.crc-32-mpeg-2 At CRC RevEng]
 === Others ===

@@ Line 28: / Line 28: @@
 === CRC-32/CKSUM ===
 The default algorithm of the traditional Unix/POSIX "cksum" utility. Note that the utility uses a high-level algorithm that preprocesses the input data.
 === CRC-32/MPEG-2 ===

@@ Line 29: / Line 29: @@
 The default algorithm of the traditional Unix/POSIX "cksum" utility. Note that the utility uses a high-level algorithm that preprocesses the input data.
-The (high-level) CRC of ASCII "<code>123456789</code>" is <code>0x377a6011</code>.
+=== CRC-32/MPEG-2 ===
 === Others ===
@@ Line 39: / Line 40: @@
 * [https://www.itu.int/rec/T-REC-V.42/en ITU-T Rec. V.42] Section 8.1.1.6.2 (IEEE CRC-32)
 * [https://rosettacode.org/wiki/CRC-32 Rosetta Code: CRC-32]
 See also [[CRC#Links]].

@@ Line 17: / Line 17: @@
 The CRC of ASCII "<code>123456789</code>" is <code>0xcbf43926</code>.
-Used by [[ZIP]], [[PNG]], [[Gzip]], [[ARJ]], etc.
+Examples of formats that use CRC-32/ISO-HDLC: [[ZIP]], [[PNG]], [[Gzip]], [[ARJ]].
 === CRC-32/CKSUM ===
-Used by the traditional Unix/POSIX "cksum" utility.
+The default algorithm of the traditional Unix/POSIX "cksum" utility. Note that the utility uses a high-level algorithm that preprocesses the input data.
-The CRC of ASCII "<code>123456789</code>" is <code>0x377a6011</code>.
+The (high-level) CRC of ASCII "<code>123456789</code>" is <code>0x377a6011</code>.
 === Others ===

@@ Line 1: / Line 1: @@
 {{FormatInfo
 |subcat=Error detection and correction
 }}
 '''CRC-32''' is a family of 32-bit hash functions used to detect accidental data corruption.
-The term ''CRC-32'' by itself usually means the IEEE CRC-32 algorithm. Other members of the CRC-32 family include CRC-32Q, CRC-32C (Castagnoli), and CRC-32K (Koopman).
+The term ''CRC-32'' by itself usually means the CRC-32/ISO-HDLC (IEEE) algorithm.
-== See also ==
+Refer to the [[CRC]] article for more information.
-* [[CRC]]
-== Specifications ==
+== Specific algorithms ==
-* [http://www.itu.int/rec/T-REC-V.42/en ITU-T Rec. V.42] Section 8.1.1.6.2 (IEEE CRC-32)
+Selected CRC-32 algorithms are listed here. The names are from the CRC RevEng Catalogue.
-== Software ==
+=== CRC-32/ISO-HDLC ===
-* [http://rosettacode.org/wiki/CRC-32 Rosetta Code: CRC-32]
+Also referred to as ISO 3309, ITU-T V.42, CRC-32-IEEE, and many other names.
-There seems to be no widely available Unix utility that computes a standard CRC-32. The POSIX '''cksum''' utility does ''not'' use the standard CRC-32 algorithm.
+The CRC of ASCII "<code>123456789</code>" is <code>0xcbf43926</code>.
 == Links ==
-* [[Wikipedia:Cyclic redundancy check|Wikipedia: Cyclic redundancy check]]
+* [https://reveng.sourceforge.io/crc-catalogue/17plus.htm#crc.cat-bits.32 CRC RevEng: Catalogue of parametrised CRC algorithms - 32 bits]
-* [http://www.infinitepartitions.com/cgi-bin/showarticle.cgi?article=art008 Understanding CRC32]
+* [https://users.ece.cmu.edu/~koopman/crc/crc32.html CRC Polynomial Zoo - 32 Bits]

← Older revision		Revision as of 17:49, 4 January 2014
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	== Links ==		== Links ==
	* [[Wikipedia:Cyclic redundancy check\|Wikipedia: Cyclic redundancy check]]		* [[Wikipedia:Cyclic redundancy check\|Wikipedia: Cyclic redundancy check]]
		+	* [http://www.infinitepartitions.com/cgi-bin/showarticle.cgi?article=art008 Understanding CRC32]

← Older revision		Revision as of 16:12, 21 April 2013
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	The term ''CRC-32'' by itself usually means the IEEE CRC-32 algorithm. Other members of the CRC-32 family include CRC-32Q, CRC-32C (Castagnoli), and CRC-32K (Koopman).		The term ''CRC-32'' by itself usually means the IEEE CRC-32 algorithm. Other members of the CRC-32 family include CRC-32Q, CRC-32C (Castagnoli), and CRC-32K (Koopman).
		+
		+	== See also ==
		+	* [[CRC]]

	== Specifications ==		== Specifications ==