JPS57172562A - Automatic tracking controller - Google Patents
Automatic tracking controllerInfo
- Publication number
- JPS57172562A JPS57172562A JP56057204A JP5720481A JPS57172562A JP S57172562 A JPS57172562 A JP S57172562A JP 56057204 A JP56057204 A JP 56057204A JP 5720481 A JP5720481 A JP 5720481A JP S57172562 A JPS57172562 A JP S57172562A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- index
- phase
- circuit
- signal
- 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
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/46—Controlling, regulating, or indicating speed
- G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
Abstract
PURPOSE:To exercise control over not only automatic recording and reproduction, but also interchangeable reproduction by eliminating the need for a control head by controlling a running speed on the basis of the reproduced signal of an index signal recorded being superposed upon a video signal. CONSTITUTION:A phase comparing circuit 60 performs phase comparison between pulses S, synchronized with a signal DTP from a tack head 3, and an index signalIand outputs a phase difference signal phi. The phase difference signal phi is supplied to a pulse generating circuit 73, which generates a positive pulse U. The pulse U is supplied to a latch circuit 72, where it is synchronized by the index signalIto output a pulse Q. Data D on a difference between the pulse S and pulse Q is written in the memory of a control circuit 71. Then, a pulse S1 generated by delaying the phase of the pulse S by the value of the data D is outputted from a delay circuit 70. On the basis of the phase difference signal phi between the pulse S1 and index signalI, a tape running speed is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56057204A JPS57172562A (en) | 1981-04-17 | 1981-04-17 | Automatic tracking controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56057204A JPS57172562A (en) | 1981-04-17 | 1981-04-17 | Automatic tracking controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57172562A true JPS57172562A (en) | 1982-10-23 |
Family
ID=13048962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56057204A Pending JPS57172562A (en) | 1981-04-17 | 1981-04-17 | Automatic tracking controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57172562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0104023A2 (en) * | 1982-09-16 | 1984-03-28 | Ampex Corporation | Synthetic control track signal producing apparatus and method for video tape machines |
| EP0224186A2 (en) * | 1985-11-20 | 1987-06-03 | Hitachi, Ltd. | Tracking control method and device in rotary head type magnetic recording and reproducing apparatus |
-
1981
- 1981-04-17 JP JP56057204A patent/JPS57172562A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0104023A2 (en) * | 1982-09-16 | 1984-03-28 | Ampex Corporation | Synthetic control track signal producing apparatus and method for video tape machines |
| EP0224186A2 (en) * | 1985-11-20 | 1987-06-03 | Hitachi, Ltd. | Tracking control method and device in rotary head type magnetic recording and reproducing apparatus |
| US4954902A (en) * | 1985-11-20 | 1990-09-04 | Hitachi, Ltd. | Tracking control method and device in rotary head type magnetic recording and reproducing apparatus |
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