JPS5450306A - Block error detection of magnetic tape - Google Patents
Block error detection of magnetic tapeInfo
- Publication number
- JPS5450306A JPS5450306A JP11550377A JP11550377A JPS5450306A JP S5450306 A JPS5450306 A JP S5450306A JP 11550377 A JP11550377 A JP 11550377A JP 11550377 A JP11550377 A JP 11550377A JP S5450306 A JPS5450306 A JP S5450306A
- Authority
- JP
- Japan
- Prior art keywords
- block
- magnetic tape
- signals
- fed
- leading end
- 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.)
- Pending
Links
Landscapes
- Detection And Correction Of Errors (AREA)
Abstract
PURPOSE: To detect the block error of a magnetic tape by providing such a special track in each block as has a redundant checking portion having a different length from a reference length.
CONSTITUTION: The output of an AND circuit 18 becomes the block detecting signals indicating that the leading end of each block of a magnetic tape arrives. In case the leading end of the block passes through a magnetic tape, a special track has a preset unit of its leading end recorded with no information so that the output of an OR circiut 10 is reduced to a low level, thus allowing only a flip-flop 26 to maintain its reset condition. As a result, the signals to be fed to the input terminals 29d, 29e and 29f of a coincidence circiut 29 take the levels of 1, 0 and 0, respectively. The circuit 29 compares the signals C to be fed to is other input terminals 29a, 29b and 29c and the signals to be fed to its input terminals 29d, 29e and 29f. In case they are not coincident, the block error generating signals of high levels are fed to an AND circuit 33
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11550377A JPS5450306A (en) | 1977-09-28 | 1977-09-28 | Block error detection of magnetic tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11550377A JPS5450306A (en) | 1977-09-28 | 1977-09-28 | Block error detection of magnetic tape |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5450306A true JPS5450306A (en) | 1979-04-20 |
Family
ID=14664121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11550377A Pending JPS5450306A (en) | 1977-09-28 | 1977-09-28 | Block error detection of magnetic tape |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5450306A (en) |
-
1977
- 1977-09-28 JP JP11550377A patent/JPS5450306A/en active Pending
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