JPS5466810A - Recording and reproducing method of pilot signals - Google Patents
Recording and reproducing method of pilot signalsInfo
- Publication number
- JPS5466810A JPS5466810A JP13442477A JP13442477A JPS5466810A JP S5466810 A JPS5466810 A JP S5466810A JP 13442477 A JP13442477 A JP 13442477A JP 13442477 A JP13442477 A JP 13442477A JP S5466810 A JPS5466810 A JP S5466810A
- Authority
- JP
- Japan
- Prior art keywords
- thru
- pilot signals
- frequencies
- heads
- autotracking
- 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
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
PURPOSE: To perform sure autotracking at the reproducing with a VTR, etc. by recording pilot signals of frequencies wherein differential frequencies assume specified relations at every adjoining track.
CONSTITUTION: Switches 25 thru 28 on the output side of oscillators 21 thru 24 which generate pilot signals of frequencies f1 thru f4 are sequentially cyclically changed over by way of a ring counter 14 formed by FFs 15 thru 18, etc. in synchronization with the pulses by the magnet piece 8 and magnetic head 9 provided to the shaft of a motor 4 for revolving rotary heads 2a, 2b of the VTR, etc. This causes the pilot signals in which frequencies satisfy the conditions of f1-f2=f3-f4≠ f3-f2=f1-f4 to be recorded at every adjoining track of the magnetic tape by the heads 2a, 2b via rotary transformer 30. When this tape is reproduced and is processed with a band-pass filter of frequency bands f1-f2, f3-f2, the easy and sure autotracking in which the track deviation directions of the heads 2a, 2b have been immediately judged via the band-pass filter may be performed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52134424A JPS5855573B2 (en) | 1977-11-08 | 1977-11-08 | Tracking signal detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52134424A JPS5855573B2 (en) | 1977-11-08 | 1977-11-08 | Tracking signal detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5466810A true JPS5466810A (en) | 1979-05-29 |
JPS5855573B2 JPS5855573B2 (en) | 1983-12-10 |
Family
ID=15128051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52134424A Expired JPS5855573B2 (en) | 1977-11-08 | 1977-11-08 | Tracking signal detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5855573B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158025A (en) * | 1982-03-15 | 1983-09-20 | Victor Co Of Japan Ltd | Pilot signal recorder |
EP0089816A2 (en) * | 1982-03-18 | 1983-09-28 | Sony Corporation | Apparatus for controlling the tracking position of a head in an apparatus for recording or reproducing information |
EP0094194A2 (en) * | 1982-05-07 | 1983-11-16 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproduction system |
JPS5948804A (en) * | 1982-09-10 | 1984-03-21 | Hitachi Ltd | Recording circuit of video tape recorder |
US4581658A (en) * | 1982-06-04 | 1986-04-08 | Hitachi, Ltd. | Variable speed picture reproducing apparatus for video tape recorder |
JPS61142894A (en) * | 1985-10-18 | 1986-06-30 | Hitachi Ltd | Chrominance signal recording and reproducing circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5042829A (en) * | 1973-08-20 | 1975-04-18 | ||
JPS51138413A (en) * | 1975-05-26 | 1976-11-30 | Nippon Hoso Kyokai <Nhk> | Magnetic sheet recorder/reproducer |
-
1977
- 1977-11-08 JP JP52134424A patent/JPS5855573B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5042829A (en) * | 1973-08-20 | 1975-04-18 | ||
JPS51138413A (en) * | 1975-05-26 | 1976-11-30 | Nippon Hoso Kyokai <Nhk> | Magnetic sheet recorder/reproducer |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158025A (en) * | 1982-03-15 | 1983-09-20 | Victor Co Of Japan Ltd | Pilot signal recorder |
JPH0132568B2 (en) * | 1982-03-15 | 1989-07-06 | Victor Company Of Japan | |
EP0089816A2 (en) * | 1982-03-18 | 1983-09-28 | Sony Corporation | Apparatus for controlling the tracking position of a head in an apparatus for recording or reproducing information |
EP0094194A2 (en) * | 1982-05-07 | 1983-11-16 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproduction system |
US4581658A (en) * | 1982-06-04 | 1986-04-08 | Hitachi, Ltd. | Variable speed picture reproducing apparatus for video tape recorder |
JPS5948804A (en) * | 1982-09-10 | 1984-03-21 | Hitachi Ltd | Recording circuit of video tape recorder |
JPH0424778B2 (en) * | 1982-09-10 | 1992-04-28 | Hitachi Ltd | |
JPS61142894A (en) * | 1985-10-18 | 1986-06-30 | Hitachi Ltd | Chrominance signal recording and reproducing circuit |
JPH0123993B2 (en) * | 1985-10-18 | 1989-05-09 | Hitachi Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS5855573B2 (en) | 1983-12-10 |
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