JPS5579582A - Servo method for video tape recorder - Google Patents
Servo method for video tape recorderInfo
- Publication number
- JPS5579582A JPS5579582A JP15437978A JP15437978A JPS5579582A JP S5579582 A JPS5579582 A JP S5579582A JP 15437978 A JP15437978 A JP 15437978A JP 15437978 A JP15437978 A JP 15437978A JP S5579582 A JPS5579582 A JP S5579582A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- head drum
- video head
- video tape
- control
- 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
Abstract
PURPOSE: To make it possible to control rotations of a video head drum not only in normal-speed playback mode but also in slow-motion playback time, by using a control signal as a reference signal.
CONSTITUTION: On the control track part of video tape 1, signals (n) times as high as a half vertical synchronizing frequency are recorded differing in amplitude and in accordance with a speed for reproduction, control signals are detected by being classified by amplitude to obtain a reference signal. This reference signal is compared with a detection signal from video head drum 6 and the error signal controls rotations of video head drum 6. Consequently, the speed of video tape 1 synchronizes accurately with that of video head drum 6 in 1/n-speed, i.e. slowmotion playback mode, let along in 1/1-speed, i.e. normal-speed playback mode, so that a stable picture can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437978A JPS5579582A (en) | 1978-12-13 | 1978-12-13 | Servo method for video tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437978A JPS5579582A (en) | 1978-12-13 | 1978-12-13 | Servo method for video tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5579582A true JPS5579582A (en) | 1980-06-16 |
Family
ID=15582853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15437978A Pending JPS5579582A (en) | 1978-12-13 | 1978-12-13 | Servo method for video tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5579582A (en) |
-
1978
- 1978-12-13 JP JP15437978A patent/JPS5579582A/en active Pending
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