JPS5528577A - Control signal detection system - Google Patents
Control signal detection systemInfo
- Publication number
- JPS5528577A JPS5528577A JP10200878A JP10200878A JPS5528577A JP S5528577 A JPS5528577 A JP S5528577A JP 10200878 A JP10200878 A JP 10200878A JP 10200878 A JP10200878 A JP 10200878A JP S5528577 A JPS5528577 A JP S5528577A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- bit
- time
- gate
- detected
- 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
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
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE:To avoid the effect of the dropout by detecting the bit section signals recorded in pile on the signals and the bit signals between the section signals and the memorizing the necessary bit number time. CONSTITUTION:When the heading of the sectioned data of the magnetic recording medium is detected by heading detector 25, FF1 is set by the heading detection pulse to open AND gate G1. Thus bit data signals DB1, DB2 and so on forming four bits and others are detected along with signals DH1 and DH2, bit section signal DH1 plus data start signal DS to be turned into the control signals through rectifier 27, waveform shaper 29 and others to trigger monostable multivibrator MM1 via OR gate G2. As a result, MM1 generates the pulse featuring the time longer than the time of one bit and shorter than the time of three bits to open AND gate G4, and FF2 is set by the detection signal passing through gate G1. Thus FF2 memorizes the time until detection of the next signals DH1, and accordingly the control signals are detected substantially via register RG and others at the fixed time even in case no signal DH1 and others is detected through dropout.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10200878A JPS5528577A (en) | 1978-08-22 | 1978-08-22 | Control signal detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10200878A JPS5528577A (en) | 1978-08-22 | 1978-08-22 | Control signal detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5528577A true JPS5528577A (en) | 1980-02-29 |
Family
ID=14315737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10200878A Pending JPS5528577A (en) | 1978-08-22 | 1978-08-22 | Control signal detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5528577A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59140666A (en) * | 1983-01-31 | 1984-08-13 | Victor Co Of Japan Ltd | Reproducer for rotary recording medium |
-
1978
- 1978-08-22 JP JP10200878A patent/JPS5528577A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59140666A (en) * | 1983-01-31 | 1984-08-13 | Victor Co Of Japan Ltd | Reproducer for rotary recording medium |
JPH0232701B2 (en) * | 1983-01-31 | 1990-07-23 | Victor Company Of Japan |
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