JPS5579582A - Servo method for video tape recorder - Google Patents

Servo method for video tape recorder

Info

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
Application number
JP15437978A
Other languages
Japanese (ja)
Inventor
Yasumasa Sugihara
Shigekazu Oka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP15437978A priority Critical patent/JPS5579582A/en
Publication of JPS5579582A publication Critical patent/JPS5579582A/en
Pending legal-status Critical Current

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
JP15437978A 1978-12-13 1978-12-13 Servo method for video tape recorder Pending JPS5579582A (en)

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)

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