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公开(公告)号：CA1281129C
公开(公告)日：1991-03-05
申请号：CA537572
申请日：1987-05-21
Applicant: SONY CORP
Inventor： NEMOTO SHOJI
IPC: G11B15/18 , G11B15/467 , H04N5/783
Abstract: APPARATUS FOR REPRODUCING VIDEO SIGNALS AS SLOW-MOTION PICTURES In an apparatus for slow-motion reproduction of a video signal having successive fields thereof, along with respective pilot signals, recorded in successive oblique tracks on a magnetic tape, a tracking error signal is based on the pilot signals reproduced from the magnetic tape, a capstan motor intermittently transports the tape between a first rest position, in which a field segment of the video signal is repeatedly reproduced from an initial one of alternate oblique tracks, rest position, to a second in which another field segment of the video signal is repeatedly reproduced from the next one of the alternate oblique tracks. A circuit controls a driving circuit for the capstan motor so that the transportation of the magnetic tape from the first to second rest position is responsive to the tracking error signal obtained in the first rest position, that is, prior to transportation of the magnetic tape.
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公开(公告)号：CA1277418C
公开(公告)日：1990-12-04
申请号：CA544968
申请日：1987-08-20
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , MACHIDA YUKIHIKO
IPC: G11B5/588 , G11B15/467
Abstract: VIDEO SIGNAL RECORDING AND/OR REPRODUCING APPARATUS In a video signal recording and/or reproducing apparatus including four magnetic heads mounted on a rotary drum for forming four parallel recording tracks in a repeating sequence on a recording medium with each track having an azimuth gap angle different from the azimuth gap angles of the next adjacent tracks; pilot signals having different frequencies are recorded in a superimposed manner upon the information signals recorded by the four magnetic heads, respectively, and, upon reproducing, tracking control is effected so as to ensure that the magnetic heads which recorded the pilot signals with different respective frequenci? ?d to reproduce the signals recorded in the respective recording tracks so that a period of a timing signal, for example, a horizontal synchronizing signal, contained in the reproduced signal will not be disturbed upon switching from one to another of the magnetic heads in the reproducing mode.
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公开(公告)号：AU592870B2
公开(公告)日：1990-01-25
申请号：AU7312387
申请日：1987-05-15
Applicant: SONY CORP
Inventor： MURABAYASHI NOBORU , KATSUMOTO TORU , KOBAYASHI KENJI , NEMOTO SHOJI
Abstract: A tape recorder has a flying erase head (FEH) and is capable of use with a plurality of types of recording tape. The tape recorder includes a detector (23) for detecting the type of a recording tape loaded in the tape recorder and operative to provide a control signal corresponding to the detected type of recording tape, a current source (21) for supplying an erase current having a characteristic which is such as to drive the flying erase head so as to erase signals recorded on the recording tape, and a controller (22) which is connected to the current source and is operative to adjust the characteristic of the erase current to the type of recording tape loaded in the tape recorder in response to the control signal.
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公开(公告)号：AT38914T
公开(公告)日：1988-12-15
申请号：AT83305021
申请日：1983-08-31
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , YOSHIOKA HIROSHI
Abstract: In an apparatus for controlling a tracking position of magnetic head which reproduces parallel tracks serially formed on magnetic tape, the parallel tracks containing a video signal and a pilot signal having mutually different frequencies changing in cyclic sequence from track to track, there is generated a reference pilot signal having the same frequencies as the frequencies of the pilot signal reproduced from the track, and the frequency of the reference pilot signal associated with one track is subtracted from the frequencies of the pilot signals reproduced from the tracks adjacent to the one track to produce a control signal indicative of displacement from the one track to be reproduced. The pilot signal generating means alternatively generates first and second reference pilot signals having the same frequencies as that of the pilot signals which are recorded in a pair of tracks to be reproduced in still picture reproducing mode.
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公开(公告)号：DE3766544D1
公开(公告)日：1991-01-17
申请号：DE3766544
申请日：1987-06-02
Applicant: SONY CORP
Inventor： NEMOTO SHOJI
IPC: G11B15/18 , G11B15/467 , H04N5/783
Abstract: An apparatus for slow-motion reproduction of a video signal having successive fields thereof, along with respective pilot signals, recorded in successive parallel tracks extending obliquely on a magnetic tape, with the pilot signals recorded in a predetermined number of the tracks constituting a group thereof having respective different frequencies in an order that is repeated cyclically for each said group of tracks on the tape, comprises a circuit for producing a tracking error signal based on the pilot signals reproduced from the magnetic tape, a driving circuit for causing a capstan motor to effect intermittent transport of the tape between a first still- picture reproducing state in which a field segment of the video signal is repeatedly reproduced from a preceding one of alternate oblique tracks to a second still-picture reproducing state in which another field segment of the video signal is repeatedly reproduced from the next or succeeding one of the alternate oblique tracks, and a control circuit for controlling the driving circuit so that the transportation of the magnetic tape is responsive to the tracking error signal obtained in the first still-picture reproducing state, that is, prior to transportation of the magnetic tape, with the result that deviation of a scanning path of rotary magnetic heads in relation to an oblique track from which a field segment of video signal is to be repeatedly reproduced in the second still-picture reproducing state is reliably minimized.
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Patent Agency Ranking
公开(公告)号：AU596180B2
公开(公告)日：1990-04-26
申请号：AU7327487
申请日：1987-05-21
Applicant: SONY CORP
Inventor： NEMOTO SHOJI
IPC: G11B15/18 , G11B15/467 , H04N5/783 , H04N5/782 , G11B15/44
Abstract: An apparatus for slow-motion reproduction of a video signal having successive fields thereof, along with respective pilot signals, recorded in successive parallel tracks extending obliquely on a magnetic tape, with the pilot signals recorded in a predetermined number of the tracks constituting a group thereof having respective different frequencies in an order that is repeated cyclically for each said group of tracks on the tape, comprises a circuit for producing a tracking error signal based on the pilot signals reproduced from the magnetic tape, a driving circuit for causing a capstan motor to effect intermittent transport of the tape between a first still- picture reproducing state in which a field segment of the video signal is repeatedly reproduced from a preceding one of alternate oblique tracks to a second still-picture reproducing state in which another field segment of the video signal is repeatedly reproduced from the next or succeeding one of the alternate oblique tracks, and a control circuit for controlling the driving circuit so that the transportation of the magnetic tape is responsive to the tracking error signal obtained in the first still-picture reproducing state, that is, prior to transportation of the magnetic tape, with the result that deviation of a scanning path of rotary magnetic heads in relation to an oblique track from which a field segment of video signal is to be repeatedly reproduced in the second still-picture reproducing state is reliably minimized.
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公开(公告)号：DE3378554D1
公开(公告)日：1988-12-29
申请号：DE3378554
申请日：1983-08-31
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , YOSHIOKA HIROSHI
Abstract: In an apparatus for controlling a tracking position of magnetic head which reproduces parallel tracks serially formed on magnetic tape, the parallel tracks containing a video signal and a pilot signal having mutually different frequencies changing in cyclic sequence from track to track, there is generated a reference pilot signal having the same frequencies as the frequencies of the pilot signal reproduced from the track, and the frequency of the reference pilot signal associated with one track is subtracted from the frequencies of the pilot signals reproduced from the tracks adjacent to the one track to produce a control signal indicative of displacement from the one track to be reproduced. The pilot signal generating means alternatively generates first and second reference pilot signals having the same frequencies as that of the pilot signals which are recorded in a pair of tracks to be reproduced in still picture reproducing mode.
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公开(公告)号：AU6659086A
公开(公告)日：1987-06-25
申请号：AU6659086
申请日：1986-12-16
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , MURABAYASHI NOBORU
IPC: G11B15/467 , H04N5/782 , G11B21/10 , G11B27/32
Abstract: In tape transpart apparatus, such as for use with an 8-mm video tape recorder having an automatic track following system, during reproduction at a variable tape speed, a tracking error signal (S ATF) formed on the basis of a frequency component (Δf A or Δf B ) of a reproduced pilot signal (S PL ) is sampled and held in a sample and hold circuit (119) once per field. The sampled and held output is compared with a reference value (V REF ) in a comparator (120), the running state of the tape is positively identified in a control circuit (107) on the basis of the comparison, and tracking control responsive to the identified running state is carried out.
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公开(公告)号：AU560482B2
公开(公告)日：1987-04-09
申请号：AU1831583
申请日：1983-08-23
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , YOSHIOKA HIROSHI
Abstract: In an apparatus for controlling a tracking position of magnetic head which reproduces parallel tracks serially formed on magnetic tape, the parallel tracks containing a video signal and a pilot signal having mutually different frequencies changing in cyclic sequence from track to track, there is generated a reference pilot signal having the same frequencies as the frequencies of the pilot signal reproduced from the track, and the frequency of the reference pilot signal associated with one track is subtracted from the frequencies of the pilot signals reproduced from the tracks adjacent to the one track to produce a control signal indicative of displacement from the one track to be reproduced. The pilot signal generating means alternatively generates first and second reference pilot signals having the same frequencies as that of the pilot signals which are recorded in a pair of tracks to be reproduced in still picture reproducing mode.
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公开(公告)号：AU591207B2
公开(公告)日：1989-11-30
申请号：AU6659086
申请日：1986-12-16
Applicant: SONY CORP
Inventor： NEMOTO SHOJI , MURABAYASHI NOBORU
IPC: G11B15/467 , H04N5/782 , G11B21/10 , G11B27/32
Abstract: In tape transpart apparatus, such as for use with an 8-mm video tape recorder having an automatic track following system, during reproduction at a variable tape speed, a tracking error signal (S ATF) formed on the basis of a frequency component (Δf A or Δf B ) of a reproduced pilot signal (S PL ) is sampled and held in a sample and hold circuit (119) once per field. The sampled and held output is compared with a reference value (V REF ) in a comparator (120), the running state of the tape is positively identified in a control circuit (107) on the basis of the comparison, and tracking control responsive to the identified running state is carried out.
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