JPS57208613A - Magnetic recorder and reproducer - Google Patents
Magnetic recorder and reproducerInfo
- Publication number
- JPS57208613A JPS57208613A JP9202281A JP9202281A JPS57208613A JP S57208613 A JPS57208613 A JP S57208613A JP 9202281 A JP9202281 A JP 9202281A JP 9202281 A JP9202281 A JP 9202281A JP S57208613 A JPS57208613 A JP S57208613A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- data
- reproduced
- level
- invalid
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/02—Analogue recording or reproducing
- G11B20/025—Error detection or correction
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE:To prevent the reading error of a data in an easy and assured way, by comparing at least >=1 set of analog information among the read-out data bit trains with the reference value and deciding the validity or invalidity of the bit train signal. CONSTITUTION:The level absolute value of the analog information in the reproduced data bit train that passes through a magnetic-electric converting part 31 and the absolute value of the bit interval are compared with the reference value respectively through a level deciding part 35 and a bit interval deciding part 36. As a result, the validity or invalidity is decided for the reproduced bit train. The parts 35 and 36 deliver the high-level invalid signals in the invalid mode in the form of the error signals. Then an AND gate 38 is controlled to cut off the output of the reproduced signal corresponding to the invalid bit train signal. As a result, no fault data is reproduced and delivered, and accordingly the reading error of the data is assuredly avoided although no parity check is carried out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9202281A JPS57208613A (en) | 1981-06-15 | 1981-06-15 | Magnetic recorder and reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9202281A JPS57208613A (en) | 1981-06-15 | 1981-06-15 | Magnetic recorder and reproducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57208613A true JPS57208613A (en) | 1982-12-21 |
JPH0458671B2 JPH0458671B2 (en) | 1992-09-18 |
Family
ID=14042904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9202281A Granted JPS57208613A (en) | 1981-06-15 | 1981-06-15 | Magnetic recorder and reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57208613A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62110175A (en) * | 1985-11-08 | 1987-05-21 | Hitachi Ltd | Method and apparatus for detecting flaw of recording medium |
JPH0223577A (en) * | 1988-07-11 | 1990-01-25 | Mitsumi Electric Co Ltd | Magnetic recording and reproducing device |
JPH03144969A (en) * | 1989-10-31 | 1991-06-20 | Internatl Business Mach Corp <Ibm> | Method and apparatus for determining data error ratio |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946705A (en) * | 1972-09-09 | 1974-05-04 | ||
JPS5634117A (en) * | 1979-08-28 | 1981-04-06 | Nippon Telegr & Teleph Corp <Ntt> | Detection system of error position |
-
1981
- 1981-06-15 JP JP9202281A patent/JPS57208613A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946705A (en) * | 1972-09-09 | 1974-05-04 | ||
JPS5634117A (en) * | 1979-08-28 | 1981-04-06 | Nippon Telegr & Teleph Corp <Ntt> | Detection system of error position |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62110175A (en) * | 1985-11-08 | 1987-05-21 | Hitachi Ltd | Method and apparatus for detecting flaw of recording medium |
JPH0223577A (en) * | 1988-07-11 | 1990-01-25 | Mitsumi Electric Co Ltd | Magnetic recording and reproducing device |
JPH03144969A (en) * | 1989-10-31 | 1991-06-20 | Internatl Business Mach Corp <Ibm> | Method and apparatus for determining data error ratio |
Also Published As
Publication number | Publication date |
---|---|
JPH0458671B2 (en) | 1992-09-18 |
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