Redundancy check - Factbites

Redundancy check - Factbites
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Topic: Redundancy check

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	Longitudinal redundancy check - Wikipedia, the free encyclopedia
		A combination of longitudinal and vertical redundancy check allows the detection and correction of single bit errors.
		In telecommunication, a longitudinal redundancy check (LRC) or horizontal redundancy check is a form of redundancy check based on the formation of a block check following preset rules:
		A longitudinal redundancy check character, which is used to verify that data has been received without error, may be computed from any sequence of characters by the following algorithm:
	en.wikipedia.org /wiki/Longitudinal_redundancy_check (181 words)

	Redundancy check - Wikipedia, the free encyclopedia
		In telecommunication, a redundancy check is extra data added to a message for the purposes of error detection and error correction.
		Other types of redundancy check include cyclic redundancy check, horizontal redundancy check, vertical redundancy check, and cryptographic message digest.
		The simplest redundancy checks, called checksums, include parity bits, check digits, and longitudinal redundancy check.
	www.wikipedia.org /wiki/Redundancy_check (91 words)

	Cyclic redundancy check - Wikipedia, the free encyclopedia
		A cyclic redundancy check (CRC) is a type of hash function used to produce a checksum, which is a small number of bits, from a large block of data, such as a packet of network traffic or a block of a computer file, in order to detect errors in transmission or storage.
		A CRC is computed and appended before transmission or storage, and verified afterwards to confirm that no changes occurred.
	en.wikipedia.org /wiki/Cyclic_redundancy_check (835 words)

	CRC - Cyclic Redundancy Check
		Cyclical Redundancy Check - A method of detecting errors in a message by performing a mathematical calculation on the bits in the message and then sending the results of the calculation along with the message.
		Cyclic Redundancy Check, a simple checksum used for detecting errors.
		The Cyclic Redundancy Check to verify the correctness of data.
	www.auditmypc.com /acronym/CRC.asp (733 words)

	Redundancy check
		A cyclic redundancy check is computed by shifting an accumulator left, inserting the next data byte, and dividing the accumulator by a binary polynomial.
		A redundancy check is extra symbols added to a message for the purposes of error [* Ma#Error-detection#detection[?] or error *] correction.
		A check digit is a digit used as a redundancy check.
	www.eurofreehost.com /re/Redundancy_check.html (175 words)

	VERTICAL REDUNDANCY CHECK - Definition
		(VRC) An error checking method performed on one 8-bit ASCII character, where the 8th bit is used as the parity bit.
		This method is unreliable because if an odd number of bits are distorted, the check will not detect the error.
		The result is a "1" if there is an odd number of 1s, and a "0" if there is an even number of 1s in the word.
	www.hyperdictionary.com /computing/vertical+redundancy+check (78 words)

	Embedding a secondary communication channel transparently within a cyclic redundancy check (CRC)
		The cyclic redundancy check is based upon the division algorithm for the ring of polynomials with coefficients taken from an algebraic field.
		Several techniques are proposed here for transparently recapturing a small portion of the capacity of a cyclic redundancy check (CRC) that is used to protect a data packet from transmission errors, and employing the recaptured capacity to carry a secondary communication channel.
		When the receiver determines that an inbound packet does not check according to any of the generators, the receiver adds the various error patterns, again looking through the possibilities by constrained trial and error for the error pattern that was employed by the transmitter and the attendant secondary-channel word.
	www.research.ibm.com /journal/rd/456/irvin.html (4584 words)

	cyclical redundancy check
		This procedure is known as a redundancy check because each transmission includes extra or redundant error-checking values as well as the data itself.
		As a security check, a CRC may be used to compare the current size of an executable file against the original size to determine if the file has been tampered with or changed in some way.
		The sending computer uses one of several formulas to calculate a value from the information contained in the data, and this value is appended to the message block before it is sent.
	www.coffeycountyks.org /Terms/2461HTML-658.html (162 words)

	September 1990/Implementing The CCITT Cyclical Redundancy Check/Sidebar
		Parity checking is easily implemented in hardware and is a feature found on most data comm chips.
		In an extreme case, all eight data bits in the byte could be reversed, but the parity check would not detect the error.
		One of the simplest error detection schemes is parity checking.
	www.tcnj.edu /~hernande/cujv5/html/08.09/felice/sidebar.htm (433 words)

	Definition: redundancy check
		A check that uses one or more extra binary digits or characters attached to data for the detection of errors.
		A method of verifying that any redundant hardware or software in a communication system is in an operational condition.
	www.atis.org /tg2k/_redundancy_check.html (56 words)

	Cyclic redundancy check
		A cyclic redundancy check (CRC) is the result of a of calculation made upon data such as traffic or computer files in order to detect errors in or duplication.
		I watched Blank Check with my nephews while I was baby sitting them when my sister and her husband went out and I thought I was not going to like it and think it was just a movie that only a...
		The title of this disk and the image of a sleeping child on the cover might lead one to assume that this is one more "Music to Relax By" recording to add to countless others that have already been made and that threaten to overwhelm the planet.
	www.freeglossary.com /CRC32 (540 words)

	Transverse redundancy check
		In telecommunication a transverse redundancy check (TRC) or vertical redundancy check is a redundancy check for synchronized parallel bit streams (a) that is based on formation of a block check following preset (b) in which the check-formation rule applied blocks is also applied to characters and in which the check is made on bit patterns.
		When a TRC is combined a longitudinal redundancy check individual erroneous bits can be corrected.
		this book needs more on how to start a check cashing company....
	www.freeglossary.com /Transverse_redundancy_check (232 words)

	High-Tech Dictionary Definition
		(VRC).A way of error checking by attaching a parity bit to each byte of data to be transmitted, which is then tested to determine if the transmission is correct.See parity bit and Cyclic Redundancy Check.
	www.computeruser.com /resources/dictionary/definition.html?lookup=5607 (35 words)

	Cyclic Redundancy Check
		Cyclic Redundancy Check - A checksum computed by the use of a shift register with exclusive or feedback or some computationally equivalent method.
	www.softwarerecommendations.com /cyclic-redundancy-check.html (23 words)

	Cyclic Redundancy check - AATraders
		Cyclic Redundancy check is an error checking technique to determine if data has been randomly and accidentally changed while in transit from one location to another.
		This error checking also occurs when data is sent to and from drives in an individual system, and the re-request for data is done by software, not observed by users.
		When media such as CD and DVD are written, there is no method for re-burning the data on the disc, after it is burned.
	www.aatraders.net /index.php/Wtf_is_a_CRC_Error (604 words)

	cyclic redundancy check from FOLDOC
		It is calculated using division either using shifts and exclusive ORs or table lookup (modulo 256 or 65536).
		A single corrupted bit in the data will result in a one bit change in the calculated CRC but multiple corrupted bits may cancel each other out.
		The CRC is "redundant" in that it adds no information.
	foldoc.doc.ic.ac.uk /foldoc/foldoc.cgi?cyclic+redundancy+check (296 words)

	Definition: transverse redundancy check
		transverse redundancy check (TRC): In synchronized parallel bit streams, a redundancy check (a) that is based on the formation of a block check following preset rules, (b) in which the check-formation rule applied to blocks is also applied to characters, and (c) in which the check is made on parallel bit patterns.
		When TRC is combined with longitudinal redundancy checking (LRC), individual erroneous bits can be corrected.
		Note 1: When the TRC is based on a parity bit applied to each character and block, the TRC can only detect, with limited certainty, whether or not there is an error.
	www.atis.org /tg2k/_transverse_redundancy_check.html (163 words)

	"Data error (cyclic redundancy check)" is reported in the Backup Exec job log during a failed backup/verify operation
		The cyclic redundancy check (CRC) error is generic in nature and can be caused by numerous factors.
		Final Error Description: "Data error (cyclic redundancy check)"
		Check with the controller and backup device manufacturer for the proper configuration for SCSI transfer rate.
	seer.support.veritas.com /docs/192216.htm (824 words)

	CRC Downloaded File Integrity Checker
		If so much as a single byte in the file being checked were to change, the cyclical redundancy check value for that file would also change.
		The CRC program calculates a "cyclical redundancy check" value for the files you specify.
		The correct CRC checks for the files you have downloaded can be found at the blue butterfly icons around the Alchemy Mindworks web page.
	www.mindworkshop.com /alchemy/crc.html (448 words)

	Data error - cyclic redundancy check. What it means for your data, CD and DVD discs
		The most common times you will see the cyclic redundancy check error message is when trying to read data from a damaged CD or DVD.
		You are here: Cyclic redundancy check data error- what it means for your data, CD and DVD.
		If something goes wrong with the data between the time it leaves the source and arrives at its destination, the CRC sent at the source will no longer match the one that is calculated when the data arrives - this is when the cyclic redundancy check error will appear.
	www.softwarepatch.com /tips/cyclic-redundancy.html (590 words)

	Math Forum - Ask Dr. Math
		Date: 06/26/2002 at 19:22:41 From: S.H. Subject: Cyclic Redundancy Check I have been studying CRCs for several days now and I understand perfectly HOW they work.
		Date: 07/03/2002 at 10:23:46 From: S.H. Subject: Thank you (Cyclic Redundancy Check) Yes, thank you, that was exactly what I wanted to know, and fully answers my question.
		Date: 06/28/2002 at 04:01:25 From: Doctor Jeremiah Subject: Re: Cyclic Redundancy Check Hi there!
	mathforum.org /library/drmath/view/60915.html (680 words)

	Cyclic redundancy check - Wikipedia, the free encyclopedia
		A cyclic redundancy check (CRC) is a type of hash function used to produce a checksum- which is a small, fixed number of bits - against a block of data, such as a packet of network traffic or a block of a computer file.
		To check the CRC, instead of calculating the CRC on the message and comparing it to the CRC, a CRC calculation may be run on the entire codeword.
		If the result is zero, the check passes.
	en.wikipedia.org /wiki/Cyclic_redundancy_check (2117 words)

	Definition: vertical redundancy check
		vertical redundancy check (VRC): Synonym transverse redundancy check.
	www.atis.org /tg2k/_vertical_redundancy_check.html (2117 words)

	Zyklische Redundanzprüfung - Wikipedia
		Die zyklische Redundanzprüfung (ZRP) (englisch Cyclic redundancy check, daher häufig CRC) ist ein Verfahren (bzw.
	de.wikipedia.org /wiki/Cyclic_Redundancy_Check (1550 words)

	CRC - Cyclic Redundancy Check
		To check that CRC, the received frame is divided by the divisor.
		Any burst error of no more than the number of check bits can be corrected.
		Any burst error less than or equal to the length of the CRC polynomial can be detected.
	www.andrew.cmu.edu /user/taon/CRC.html (183 words)

	wer-weiss-was "Cyclic Redundancy Check" aus Forum Informatik
		Re: Cyclic Redundancy Check (M a r c o H o r s t m a n n, 15.4.2001 14:45)
		Re: Cyclic Redundancy Check (H e r b, 2.5.2001 15:49)
		Cyclic Redundancy Check (J a n, 11.4.2001 13:27)
	www.wer-weiss-was.de /theme121/article621760.html (281 words)

	How does cyclic redundancy check (CRC) work?
		Most modern tape drives do support CRC within their drive so yes, CRC checking is probably happening in the drive in your case.
		Usually if your tape drive is performing the CRC check, you will simply get a write error if it fails.
		This leads me to believe that this is your backup software that is doing the CRC check and failing as well.
	whatis.techtarget.com /ateQuestionNResponse/0,289625,sid5_cid529277_tax286189,00.html (238 words)

	cyclic redundancy check data error : The Data Resource
		Cyclic Redundancy Check (CRC) is a common method for protecting binary data that way...
		After Microsoft Outlook 2000 downloads e-mail to your computer, you may receive the following error message: Data error (cyclic redundancy check) You may not be able to view some of the downloaded...
		cyclic redundancy check data error: The Data Resource
	www.myam.qc.ca /data-error-cyclic-redundancy/cyclic-redundancy-check-data-error.html (304 words)

	Untitled Document
		A powerful method for detecting errors in the received data is by grouping the bytes of data into a block and calculating a Cyclic Redundancy Check (CRC).
		This is usually done by the data link protocol and calculated CRC is appended to the end of the data link layer frame.
	www.erg.abdn.ac.uk /users/gorry/course/dl-pages/crc.html (469 words)

	CRC ERROR = Cylic Redundancy Check -- WHY - TechIMO Forums
		I can't even open some zip files any more due to these Cylic Redundancy Check errors.
		(3) Check the jumpers on the back of your drives, and make sure they are correct.
		I've been getting alot of errors over the last couple months but it has been escalating to the point of major irritation and it is halting any productive efficiency I could possibly muster.
	www.techimo.com /forum/showthread.php?t=99352 (343 words)

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