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公开(公告)号：CA1191601A
公开(公告)日：1985-08-06
申请号：CA404459
申请日：1982-06-04
Applicant: SONY CORP
Inventor： SAITO ISAO
Abstract: A tracking control device for a video tape recorder comprises a bimorph leaf on which a rotary playback head is mounted so as to be deflectable in a direction perpendicular to tracks to be scanned. A triangular wave signal generating circuit comprising cascaded flip-flops generates a substantially triangular wave signal which is supplied to the bimorph leaf to cause the playback head to wobble relative to the tracks. A detecting circuit detects an envelope signal in the signal reproduced by the playback head, and a phase comparing circuit which includes an exclusive-OR circuit compares the phase of this envelope signal with the phase of the triangular wave signal. The output of the phase comparing circuit is fed back to the bimorph leaf to effect tracking correction.
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公开(公告)号：CA1114498A
公开(公告)日：1981-12-15
申请号：CA293787
申请日：1977-12-22
Applicant: SONY CORP
Inventor： SAITO ISAO
Abstract: A battery-operable video tape recorder includes rotary magnetic head which during normal operation is driven at a predetermined speed controlled by a servo circuit. In the pause mode of the recorder the rotary magnetic head is driven at a lower, uncontrolled speed to reduce power consumption. Release of the pause mode may be delayed until the servo circuit has locked following a pause.
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公开(公告)号：AU3193177A
公开(公告)日：1979-06-28
申请号：AU3193177
申请日：1977-12-22
Applicant: SONY CORP
Inventor： SAITO ISAO
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公开(公告)号：DE69219011D1
公开(公告)日：1997-05-22
申请号：DE69219011
申请日：1992-06-09
Applicant: SONY CORP
Inventor： SHIROCHI YOSHIKI , NUMAKURA TOSHIHIKO , SAITO ISAO
Abstract: The video signal processing circuit in accordance with the present invention comprises an anti-piracy signal generating circuit for generating anti-piracy signal components to a video signal reproduced by a first video unit, the signal components being interleaved to a frequency fH in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly to the luminance signal, first color difference signal, and second color difference signal.
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公开(公告)号：CA1180113A
公开(公告)日：1984-12-27
申请号：CA404461
申请日：1982-06-04
Applicant: SONY CORP
Inventor： SAITO ISAO
Abstract: A magnetic reproducing apparatus comprises two rotary magnetic heads mounted on respective bimorphs, the heads being displaceable in the transverse direction relative to recorded tracks on a magnetic tape is response to control voltages applied to the respective bimorphs to effect correct scanning of the tracks, a pulse generator for generating a first pulse signal of frequency dependent on the transport speed of the tape, a first counter for counting the pulses of the first pulse signal to produce a first count output each time a head completes scanning of a track, a second counter which, starting from the first count output, counts the pulses of a second pulse signal which has a frequency which is an integral multiple of the frequency of the first pulse signal and produces a second count output, and a circuit to derive from the second count output control voltages for supply to the bimorphs to preset the positions of the heads relative to the tracks each time a head is to start scanning a track. The apparatus further comprises a third counter for counting the pulses of the first pulse signal to produce a respective third count output corresponding to each scan of a track by a head, a subtractor to derive a difference output from each third count output and the immediately preceding third count output, and an adder to add the difference output to the second count output prior to supply to the circuit for deriving the control voltage, whereby the control voltages are modified in dependence on acceleration or deceleration of the transport speed of the tape.
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Patent Agency Ranking
公开(公告)号：DE2800499A1
公开(公告)日：1978-07-13
申请号：DE2800499
申请日：1978-01-05
Applicant: SONY CORP
Inventor： SAITO ISAO
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公开(公告)号：DE69219011T2
公开(公告)日：1997-07-24
申请号：DE69219011
申请日：1992-06-09
Applicant: SONY CORP
Inventor： SHIROCHI YOSHIKI , NUMAKURA TOSHIHIKO , SAITO ISAO
Abstract: The video signal processing circuit in accordance with the present invention comprises an anti-piracy signal generating circuit for generating anti-piracy signal components to a video signal reproduced by a first video unit, the signal components being interleaved to a frequency fH in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly to the luminance signal, first color difference signal, and second color difference signal.
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公开(公告)号：DE3265594D1
公开(公告)日：1985-09-26
申请号：DE3265594
申请日：1982-05-21
Applicant: SONY CORP
Inventor： SAITO ISAO
Abstract: A tracking control device for a video tape recorder comprises a bimorph leaf on which a rotary playback head is mounted so as to be deflectable in a direction perpendicular to tracks to be scanned. A triangular wave signal generating circuit comprising cascaded flip-flops generates a substantially triangular wave signal which is supplied to the bimorph leaf to cause the playback head to wobble relative to the tracks. A detecting circuit detects an envelope signal in the signal reproduced by the playback head, and a phase comparing circuit which includes an exclusive-OR circuit compares the phase of this envelope signal with the phase of the triangular wave signal. The output of the phase comparing circuit is fed back to the bimorph leaf to effect tracking correction.
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公开(公告)号：AT15119T
公开(公告)日：1985-09-15
申请号：AT82302627
申请日：1982-05-21
Applicant: SONY CORP
Inventor： SAITO ISAO
Abstract: A tracking control device for a video tape recorder comprises a bimorph leaf on which a rotary playback head is mounted so as to be deflectable in a direction perpendicular to tracks to be scanned. A triangular wave signal generating circuit comprising cascaded flip-flops generates a substantially triangular wave signal which is supplied to the bimorph leaf to cause the playback head to wobble relative to the tracks. A detecting circuit detects an envelope signal in the signal reproduced by the playback head, and a phase comparing circuit which includes an exclusive-OR circuit compares the phase of this envelope signal with the phase of the triangular wave signal. The output of the phase comparing circuit is fed back to the bimorph leaf to effect tracking correction.
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公开(公告)号：DE3261830D1
公开(公告)日：1985-02-21
申请号：DE3261830
申请日：1982-05-24
Applicant: SONY CORP
Inventor： SAITO ISAO
IPC: H04N5/7826 , G11B5/58 , G11B5/588 , G11B5/592
Abstract: A magnetic reproducing apparatus comprises two rotary magnetic heads mounted on respective bimorphs, the heads being displaceable in the transverse direction relative to recorded tracks on a magnetic tape is response to control voltages applied to the respective bimorphs to effect correct scanning of the tracks, a pulse generator for generating a first pulse signal of frequency dependent on the transport speed of the tape, a first counter for counting the pulses of the first pulse signal to produce a first count output each time a head completes scanning of a track, a second counter which, starting from the first count output, counts the pulses of a second pulse signal which has a frequency which is an integral multiple of the frequency of the first pulse signal and produces a second count output, and a circuit to derive from the second count output control voltages for supply to the bimorphs to preset the positions of the heads relative to the tracks each time a head is to start scanning a track. The apparatus further comprises a third counter for counting the pulses of the first pulse signal to produce a respective third count output corresponding to each scan of a track by a head, a subtractor to derive a difference output from each third count output and the immediately preceding third count output, and an adder to add the difference output to the second count output prior to supply to the circuit for deriving the control voltage, whereby the control voltages are modified in dependence on acceleration or deceleration of the transport speed of the tape.
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