JPS56145553A - Tracking error detection system - Google Patents

Tracking error detection system

Info

Publication number
JPS56145553A
JPS56145553A JP4937580A JP4937580A JPS56145553A JP S56145553 A JPS56145553 A JP S56145553A JP 4937580 A JP4937580 A JP 4937580A JP 4937580 A JP4937580 A JP 4937580A JP S56145553 A JPS56145553 A JP S56145553A
Authority
JP
Japan
Prior art keywords
pilot signal
voltage
signal
constitution
level
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
JP4937580A
Other languages
Japanese (ja)
Other versions
JPS6135615B2 (en
Inventor
Kanji Kubo
Hiroshi Taniguchi
Takehiko Yano
Mitsunobu Furumoto
Sadafumi Kitamura
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 JP4937580A priority Critical patent/JPS56145553A/en
Publication of JPS56145553A publication Critical patent/JPS56145553A/en
Publication of JPS6135615B2 publication Critical patent/JPS6135615B2/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 detect track slippage with a simple circuit constitution, by recording the pilot signal of a single frequency together with the video signal and by comparing levels of the pilot signal relatively at the reproducing time to obtain a tracking error signal. CONSTITUTION:The horizontal synchronizing signal included in the video signal is converted to a sine waveform through synchronizing separating circuit 32, band-pass filter 34, etc. to obtain pilot signal fB. Then, pilot signals which are different in phase by 180 deg. for every two tracks are recorded through switch circuit 36. The reproduced pilot signal is caused to pass through amplifying circuit 47, etc. to take out a voltage corresponding to the reproduced output level, and then, voltage (g) corresponding to the difference between voltage (e) corresponding to the level of the pilot signal and voltage (f) corresponding to the level of the pilot signal to be reproduced by head HB, namely, tracking slippage is output to terminal 52 through level comparator 51. By this constitution, track slippage is detected with the simple circuit constitution where the phase control circuit is not used.
JP4937580A 1980-04-14 1980-04-14 Tracking error detection system Granted JPS56145553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4937580A JPS56145553A (en) 1980-04-14 1980-04-14 Tracking error detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4937580A JPS56145553A (en) 1980-04-14 1980-04-14 Tracking error detection system

Publications (2)

Publication Number Publication Date
JPS56145553A true JPS56145553A (en) 1981-11-12
JPS6135615B2 JPS6135615B2 (en) 1986-08-14

Family

ID=12829273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4937580A Granted JPS56145553A (en) 1980-04-14 1980-04-14 Tracking error detection system

Country Status (1)

Country Link
JP (1) JPS56145553A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58141431A (en) * 1982-02-17 1983-08-22 Hitachi Ltd Magnetic video recording and reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58141431A (en) * 1982-02-17 1983-08-22 Hitachi Ltd Magnetic video recording and reproducing device

Also Published As

Publication number Publication date
JPS6135615B2 (en) 1986-08-14

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