JPS558673A - Auto-tracking device - Google Patents

Auto-tracking device

Info

Publication number
JPS558673A
JPS558673A JP8181478A JP8181478A JPS558673A JP S558673 A JPS558673 A JP S558673A JP 8181478 A JP8181478 A JP 8181478A JP 8181478 A JP8181478 A JP 8181478A JP S558673 A JPS558673 A JP S558673A
Authority
JP
Japan
Prior art keywords
modulated
phase
signals
horizontal scanning
scanning period
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.)
Granted
Application number
JP8181478A
Other languages
Japanese (ja)
Other versions
JPS6228485B2 (en
Inventor
Masamitsu Otsu
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8181478A priority Critical patent/JPS558673A/en
Publication of JPS558673A publication Critical patent/JPS558673A/en
Publication of JPS6228485B2 publication Critical patent/JPS6228485B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Abstract

PURPOSE:To perform auto-tracking of a VTR, etc., well and surely without pilot signals, etc., by recording video signals, which are modulated with a strong correlation after and before one horizontal scanning period, in the same phase and the opposite phase in every adjacent tracks. CONSTITUTION:Video signals are modulated with a strong correlation before and after one horizontal scanning period by FM modulator 2 which is controlled by synchronizing signal separation circuit 5 and reset signal generator 6. These modulated signals and modulated signals which have the phase inverted by polarity inverter 3 are switched by switching signal generator 7 and switching circuit 4 which are controlled by vertical synchronizing signal separation circuit 8, frequency divider 9 and signal generator 6, and are recorded on the VTR tape through head 10. Then, video signals which were modulated with the strong correlation of the same phase and the opposite phase in every adjacent tracks are recorded before and after one horizontal scanning period. As a result, when the position of the head is subjected to servo control so that the sum of in-phase and anti-phase reproducing signals modulated with this correlation may be zero, auto-tracking is performed.
JP8181478A 1978-07-04 1978-07-04 Auto-tracking device Granted JPS558673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8181478A JPS558673A (en) 1978-07-04 1978-07-04 Auto-tracking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8181478A JPS558673A (en) 1978-07-04 1978-07-04 Auto-tracking device

Publications (2)

Publication Number Publication Date
JPS558673A true JPS558673A (en) 1980-01-22
JPS6228485B2 JPS6228485B2 (en) 1987-06-20

Family

ID=13756957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8181478A Granted JPS558673A (en) 1978-07-04 1978-07-04 Auto-tracking device

Country Status (1)

Country Link
JP (1) JPS558673A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63167457A (en) * 1986-12-28 1988-07-11 Sony Corp Data processor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271212A (en) * 1975-12-11 1977-06-14 Sony Corp Magnetic playback apparatus
JPS5333106A (en) * 1976-09-09 1978-03-28 Sony Corp Magnetic

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271212A (en) * 1975-12-11 1977-06-14 Sony Corp Magnetic playback apparatus
JPS5333106A (en) * 1976-09-09 1978-03-28 Sony Corp Magnetic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63167457A (en) * 1986-12-28 1988-07-11 Sony Corp Data processor

Also Published As

Publication number Publication date
JPS6228485B2 (en) 1987-06-20

Similar Documents

Publication Publication Date Title
DE3364235D1 (en) Magnetic recording/reproducing apparatus
JPS56115084A (en) Video signal reproducer
DE3168073D1 (en) Video signal reproducing apparatus
GB1522340A (en) Apparatus for recording a video signal
JPS5345509A (en) Automatic tracking apparatus
JPS53113517A (en) Recording/reproducing system
JPS558673A (en) Auto-tracking device
SE8103478L (en) VIDEO SIGNAL DISPLAY DEVICE
JPS5525805A (en) Servo circuit of video tape recorder
JPS5641510A (en) Sound signal recording reproducing system
JPS54108612A (en) Reproduction preventing system of recorded video tapes
JPS5256906A (en) Tracking control signal recording and reproduction system in magnetic recording and playback apparatus
JPS5389407A (en) Tracking controller for magnetic recorder/reproducer
JPS5712413A (en) Recording and reproducing system of pilot signal
US4323930A (en) Slow moving video tape reproduction
JPS5579582A (en) Servo method for video tape recorder
JPS57141180A (en) Recording and reproducing device
JPH0320916Y2 (en)
GB916806A (en) Improvements relating to the recording and reproduction of colour television signals
JPS5544215A (en) Video recording and reproducing unit
JPS5350920A (en) Magnetic recording/reproducing system
JPS5468614A (en) Tracking control device of magnetic picture recording reproducer
JPS57206188A (en) Recorder of color video signal
JPS5271214A (en) Playback method
JPS5283213A (en) Magnetic recording apparatus