• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1533648 Identifying recording speed of a prerecorded tape AMPEX CORP 8 Dec 1976 [19 March 1976] 51320/76 Heading G5R To identify the speed at which a pre-recorded tape 12 was recorded, the tape 12 is driven at any playback speed in a recorder/reproducer to replay a control track 16 on the tape, the ratio of the frequency of a capstan tacho 20 signal to that of a component of the replayed control track signal is measured, and a ratio-dependent logic level is developed indicative of the recording speed. 15 and 7 i.p.s. quadruplex video tapes each carry a control track 16 which when played at the correct speed has a 240 Hz signal. The capstan tacho 20 gives 3À84 KHz and 1À92 KHz at 15 and 7¢ i.p.s. respectively. The control track signal passes to a multiple capacitor filter 22 of a commutating filter 24 which acts like a synchronous detector working simultaneously at T/16 and T/8, where T is the capstan tacho frequency. The output of filter 24 passes to divide-by-eight 30, the output of which causes monostables 32, 34 to supply clock pulses to D- type flip-flop 38 and reset pulses to a divider 28 counting the tacho pulses. If a 7¢ i.p.s. tape is replayed at 7¢ or 15 i.p.s., filter 24 gives 240 Hz or 480 Hz respectively and divider 28 is reset every 1/30 or 1/60 sec. respectively, divider 28 repeatedly counting up to 64 in either case, i.e. below a threshold of 96 so that flip-flop 38 gives a low logic output indicating 7¢ i.p.s. Standard recording speed. Similarly for a 15 i.p.s. tape replayed at 7¢ i.p.s. or 15 i.p.s., filter 24 output is 120 Hz or 240 Hz respectively, and divider 28 repeatedly counts to 128 so that flipflop 38 gives a high logic output indicating 15 i.p.s. standard recording speed.
    公开号:SU906398A3
    申请号:SU772459303
    申请日:1977-03-10
    公开日:1982-02-15
    发明作者:В.Олдершоу Реджинальд；С.Басбай Эдвин (Младший)
    申请人:Ампекс Корпорейшн (Инофирма)；
    IPC主号:
    专利说明:

    The invention relates to the accumulation of information, namely, devices for determining the nominal value of the standard speed of the magnetic tape during recording.
    A device for determining the nominal value of the standard speed of the magnetic tape during recording, containing a tachometer kinematically connected with magnetic tape £ 1 J.
    The known device has a relatively simple design, but it is not possible to provide a sufficiently high accuracy in determining the nominal value of the standard speed of the magnetic tape during recording.
    Also known is a device for determining the nominal value of the standard speed of the magnetic tape during recording, containing a tachometer kinematically connected to a magnetic tape coupled to a magnetic head for reproducing a control signal, a frequency divider, a pulse shaper, an element with two stable states and an output bus. This device makes it possible to ensure a relatively high accuracy in determining the nominal value of the standard speed of movement of a magnetic tape during recording [ .].
    The disadvantage of this device is the considerable length of the process of determining the nominal value of the standard speed of movement of the magnetic tape during recording.
    -The purpose of the invention is the acceleration of the process of determining the nominal value of the standard speed 20 of the magnetic tape.
    This is achieved by the fact that a switching filter is introduced into the device for determining the nominal value of the standard speed of the magnetic tape during recording 25, the inputs of which are connected to the magnetic playback head of the control signal and to the output of the tachometer connected through the frequency divider to the first input of the element with two stable - 5 states, the output of which is connected to the output bus. In this case, the output of the switching filter is connected to the pulse shaper, the output of which is so, is connected to the input of the unit to the zero state of the frequency divider and is connected to the second input of the element with two stable states.
    In addition, the switching filter 15 can be made in the form of a multi-channel capacitive filter and an additional frequency divider connected to it.
    The drawing shows the proposed 20 device option.
    The proposed device contains a tachometer 1, kinematically connected to the magnetic tape 2 by means of a guide roller 3. Moreover, the magnetic tape 2 is paired with a magnetic head 4 for reproducing a control signal interacting. with track 5 of the control channel. The device also contains a switching filter 6, the inputs of which are connected to the magnetic head 4 of the playback control signal and to the output of the tachometer
    1. The output of the tachometer 1 is connected to the first 35 input of the element 7 with two stable states through a frequency divider, consisting directly of the divider 8 and the logical element 40 AND 9 connected in series with it. The output of the element 7 with two stable states connected to the output bus 10, and the output of the switching filter 6 is connected to the pulse shaper, consisting of a divider ϊ1 connected in series and a monostable multivibrator
    12. The output of the pulse sequence former is connected to the input 50 of the installation to the zero state of the frequency divider and connected to the second input of element 7 with two stable states through an additional monostable multivibrator 55 13. Element 7 with two stable states is mounted with the possibility of generating a logical signal the ratio of the frequency of the signal of the tachometer 1 to the frequency of the output signal of the switching filter 6, which can be made in the form of a multi-channel capacitive filter 14 and connected to mu additional divider 15 frequency.
    In the proposed device, the inputs of the switching filter 6 receive signals from the magnetic head 4 for reproducing the control signal and from the output of the tachometer 1. The signal from the output of the switching filter 6 is supplied through the Divider 11, a monostable multivibrator 12 and an additional monostable multivibrator 13 to the input of the zero frequency divider consisting directly of a divider 8 and a logical element And 9 connected in series with it. A signal is output from the output of tachometer 1 to this frequency divider Enikeev the first input element 7 is bistable, the second input of which receives a signal of monostable multivibrator 12. The element 7 bistable generates a signal defining a nominal value of the standard speed of the magnetic tape 2 in the recording process.
    The use of the invention allows to significantly speed up the process of determining the nominal value of the standard speed of the magnetic tape.
    权利要求:
    Claims (2)
    [1]
    3 of which are connected to a magnetic head for reproducing a control signal and to the output of a tachometer connected via a frequency divider to the first input of an element with two stable states whose output is connected to the output bus. At the same time, the output of the switching filter is connected to a pulse sequencer, the output of which is connected to the installation input, to the zero state of the frequency divider and connected to the second input of the element with two stable states. In addition, the switching filter can be made in the form of a multichannel capacitive filter and an additional frequency link connected to it. The drawing shows the proposed device option. The proposed device comprises a tachometer 1, kinematically connected to the magnetic tape 2 by means of a guide roller 3. In this case, the magnetic tape 2 is coupled with a magnetic head 4 for reproducing a pilot signal interacting with the track 5 of the control channel. The device also contains a switching filter 6, the inputs of which are connected to the magnetic reproduction head 4 and to the output of tachometer 1. The output of tachometer 1 is connected to the first input of element 7 with two stable states through a frequency divider consisting of divider 8 and a logical element AND 9 connected with it; In this case, the output of element 7 with two stable states is connected to the output bus 10, and the output of the switching filter 6 is connected to the driver sequential and pulses consisting of a series-connected divider 11 and a monostable multivibrator 12. The output of the pulse trainer is connected to the input of the zero state of the frequency divider and connected to the second input of the element 7 with two stable states through an additional monostable multivibrator 13. Element 7 with two stable states is mounted with the possibility of forming a logical 8 signal of the ratio of the frequency of the signal of tachometer 1 to the frequency of the output signal of the switching f Iltra 6, which can be made in the form of a multi-channel capacitive filter 14 and an additional frequency divider 15 connected to it. In the proposed device, the inputs of the switching filter 6 receive signals from the magnetic head 4 of the reproduction of the control signal and the output of the tachometer I, the signal from the output of the switching filter 6 comes through Divider 11, monostable multivibrator 12 and additional monostable multivibrator 13 to the input of setting the divider to zero state frequency, consisting directly of the splitter 8 and from the logic element AND 9 connected in series with it. This frequency divider from the output of the tachometer 1 is given a signal acting on the first input element 7 with the two stable states according to the second input of which receives a signal of monostable multivibrator 12. The element 7 with the two stable states according generates a signal defining a nominal value of a standard tape movement speed 2 during recording. The use of the invention significantly speeds up the process of determining the nominal value of the statistical speed of the magnetic tape. Claim 1. Device for determining the nominal value of the standard speed of a magnetic tape during recording, containing a tachometer, kinematically connected to a magnetic tape, conjugated to a control signal reproduction magnetic head, frequency divider. A pulse trainer element with two stable states and an output bus, characterized in that, in order to accelerate the process of determining the nominal value of the standard velocity of the magnetic tape, the switching filter, the inputs of which are connected to the magnetic signal reproducing head and the output of a tachometer connected through a frequency divider with the first input of an element with two stable states, the output of which is connected to the output bus, the output of the switching f ltra connected to the pulse sequence shaper whose output is connected to the input for setting to zero state and the frequency divider is connected to the second input element having two stable states. 8 2, the device according to claim 1, characterized in that the switching filter is made in the form of a multichannel capacitive filter and an additional frequency divider connected to it. Sources of information taken into account during the examination 1. Patent of Great Britain 5 1098295 cl. G 1 K, 10.01.68.
    [2]
    2. Korolkov V.G. Lpytani tape recorders. M.-L., Energie, 1965, p. 13-17 (prototype).
    类似技术:
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    JPS55123283A|1980-09-22|Still picture reproducting device
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    同族专利:
    公开号 | 公开日
    DE2652781C3|1979-12-20|
    FR2345036B1|1982-04-09|
    GB1533648A|1978-11-29|
    NL170989C|1983-01-17|
    NL170989B|1982-08-16|
    JPS52113705A|1977-09-24|
    CA1068397A|1979-12-18|
    AT355331B|1980-02-25|
    IT1074959B|1985-04-22|
    JPS5649370B2|1981-11-21|
    BE848425A|1977-03-16|
    US4044389A|1977-08-23|
    DE2652781A1|1977-09-29|
    DE2652781B2|1979-04-19|
    NL7613321A|1977-09-21|
    FR2345036A1|1977-10-14|
    ATA188577A|1979-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3702382A|1970-08-11|1972-11-07|Honeywell Inc|Frequency divider|
    US3805286A|1973-02-01|1974-04-16|Storage Technology Corp|Tape velocity detector|
    US3950735A|1974-01-04|1976-04-13|Honeywell Information Systems, Inc.|Method and apparatus for dynamically controlling read/write operations in a peripheral subsystem|JPS6016028B2|1977-11-18|1985-04-23|Sony Corp|
    JPS6016027B2|1977-11-18|1985-04-23|Sony Corp|
    US4151566A|1977-11-29|1979-04-24|Rca Corporation|Magnetic tape position measuring system|
    JPS5827894B2|1977-12-06|1983-06-13|Matsushita Electric Ind Co Ltd|
    US4224645B1|1978-02-03|1999-08-03|Ampex|Method and apparatus for controlling the movement of a recording medium|
    JPS6142328B2|1978-12-19|1986-09-20|Mitsubishi Electric Corp|
    JPS6022418B2|1979-02-19|1985-06-01|Matsushita Electric Ind Co Ltd|
    US4394701A|1979-11-24|1983-07-19|Matsushita Electric Industrial Co., Ltd.|Recording time mode detector|
    US4323930A|1980-10-06|1982-04-06|Recortec, Inc.|Slow moving video tape reproduction|
    JPS6356615B2|1980-10-15|1988-11-08|Matsushita Electric Ind Co Ltd|
    DE3270309D1|1981-12-09|1986-05-07|Hitachi Ltd|Magnetic recording system|
    US4594618A|1982-12-24|1986-06-10|Canon Kabushiki Kaisha|Information reproducing apparatus|
    WO1992009074A1|1990-11-13|1992-05-29|Wangtek, Inc.|System and method of controlling data transfer rate in a magnetic tape drive|
    KR0121698Y1|1993-06-30|1998-08-01|김광호|Signal recording and reproducing apparatus with standard and long time mode distinguishing function|
    US6424483B1|1995-11-21|2002-07-23|Matsushita Electric Industrial Co., Ltd.|Control system of tape travel for a magnetic recording and reproducing apparatus|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/668,677|US4044389A|1976-03-19|1976-03-19|Method and apparatus for measuring the speed at which a tape was recorded|
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