JPS5612183A - Variable-speed controller of vtr - Google Patents
Variable-speed controller of vtrInfo
- Publication number
- JPS5612183A JPS5612183A JP8685679A JP8685679A JPS5612183A JP S5612183 A JPS5612183 A JP S5612183A JP 8685679 A JP8685679 A JP 8685679A JP 8685679 A JP8685679 A JP 8685679A JP S5612183 A JPS5612183 A JP S5612183A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- microcomputer
- variable
- signal
- value
- 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
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
-
- 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
- G11B15/1808—Driving of both record carrier and head
- G11B15/1875—Driving of both record carrier and head adaptations for special effects or editing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To realize the speed control of VTR by a microcomputer relatively slow in processing speed by setting the clock frequency of the microcomputer to the common divisor of the delay value of a false vertical synchronizing processing circuit. CONSTITUTION:Magnetic tape 1 is driven at a speed that corresponds to a set variable-speed magnifying rate. In this case, tracking operation is carried out by tracking servomechanism 7 so as to remove a noise band. A head start signal is included in an interruption input to microcomputer 12 and in an interruption processing routine, delaying is periodically done by a needed value that corresponds to the variable-speed magnifying rate to generate a false vertical synchronizing signal, which is added to a reproduced video signal. A servocontrol signal is also delayed by the microcomputer. Since an integer relation is born between the clock frequency and delay value, the delayed value is made accurate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8685679A JPS5612183A (en) | 1979-07-11 | 1979-07-11 | Variable-speed controller of vtr |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8685679A JPS5612183A (en) | 1979-07-11 | 1979-07-11 | Variable-speed controller of vtr |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5612183A true JPS5612183A (en) | 1981-02-06 |
Family
ID=13898447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8685679A Pending JPS5612183A (en) | 1979-07-11 | 1979-07-11 | Variable-speed controller of vtr |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5612183A (en) |
-
1979
- 1979-07-11 JP JP8685679A patent/JPS5612183A/en active Pending
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