JPS6476465A - Error position detecting circuit - Google Patents

Error position detecting circuit

Info

Publication number
JPS6476465A
JPS6476465A JP23201787A JP23201787A JPS6476465A JP S6476465 A JPS6476465 A JP S6476465A JP 23201787 A JP23201787 A JP 23201787A JP 23201787 A JP23201787 A JP 23201787A JP S6476465 A JPS6476465 A JP S6476465A
Authority
JP
Japan
Prior art keywords
error
time point
syndrome
output
inclining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP23201787A
Other languages
Japanese (ja)
Other versions
JPH0831257B2 (en
Inventor
Manabu Yamagata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62232017A priority Critical patent/JPH0831257B2/en
Publication of JPS6476465A publication Critical patent/JPS6476465A/en
Publication of JPH0831257B2 publication Critical patent/JPH0831257B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To improve error correcting ability by providing a circuit to investigate an inclining parity syndrome and a vertical parity syndrome, early detecting an error channel and detecting an unknown error channel again. CONSTITUTION:When a selector 4 is activated by the output of a latch circuit 1, a step '1' to be the nearest to the top step is extracted from the contents of a syndrome register and even when there is the step '1' to be lower than it, it is suppressed. The output to be obtained in such a way obtains a first error track number (j) corresponding to the bit position when there is the first '1'. In such a case, the first error track number (j) is obtained at the time point of a bit position (m) and second detection is started from the time point of m+1 and the arbitrary second error position detection of an inclining line can be executed. Thus, the first error track is determined early and as the result, a range, in which the second error can be properly detected, is enlarged.
JP62232017A 1987-09-18 1987-09-18 Error position detection circuit Expired - Lifetime JPH0831257B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62232017A JPH0831257B2 (en) 1987-09-18 1987-09-18 Error position detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62232017A JPH0831257B2 (en) 1987-09-18 1987-09-18 Error position detection circuit

Publications (2)

Publication Number Publication Date
JPS6476465A true JPS6476465A (en) 1989-03-22
JPH0831257B2 JPH0831257B2 (en) 1996-03-27

Family

ID=16932653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62232017A Expired - Lifetime JPH0831257B2 (en) 1987-09-18 1987-09-18 Error position detection circuit

Country Status (1)

Country Link
JP (1) JPH0831257B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02278575A (en) * 1989-04-19 1990-11-14 Fujitsu Ltd Ecc control system at time of backward read
JP2003317400A (en) * 2003-02-14 2003-11-07 Fujitsu Ltd Controller for magnetic tape unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488109A (en) * 1977-12-23 1979-07-13 Ibm Error corrector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488109A (en) * 1977-12-23 1979-07-13 Ibm Error corrector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02278575A (en) * 1989-04-19 1990-11-14 Fujitsu Ltd Ecc control system at time of backward read
JP2003317400A (en) * 2003-02-14 2003-11-07 Fujitsu Ltd Controller for magnetic tape unit

Also Published As

Publication number Publication date
JPH0831257B2 (en) 1996-03-27

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