• 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:
    A magnetic disc reproducing apparatus, for reproducing information signals from one of a plurality of tracks of a magnetic disc, includes a transducer (21) positioned in transducing relation with the plurality of tracks for reading out the information signals of the tracks, a checking circuit (45, 52) connected to the transducer (21) for checking a portion of the information signals, and an identifying circuit (53) connected to the checking circuit (45, 52) for identifying characteristics of the information signals being reproduced.
    公开号:SU1521296A3
    申请号:SU853901450
    申请日:1985-05-21
    公开日:1989-11-07
    发明作者:Кутараги Кен
    申请人:Сони Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to the field of accumulation of information, in particular, to devices for reproducing data from magnetic disks used in electronic cameras of still images.
    The aim of the invention is to reduce the error of multi-track reproduction.
    Figure 1 shows the block diagram of the device; 2, diagrams illustrating the disc format used.
    The device (Fig. 1) contains a reproduction head 1, in contact with a magnetic disk (Fig. 2) and connected through a reproduction amplifier 2 to the inputs of the luminance signal processing unit 3, the chrominance signal processing unit 4, series-parallel ( -10-8) converter 5 of the code, phase locked loop 6 (PLL) and fallout detector 7, connected by an output to the output signal h of the presence of a fallout, the second magnetic head 8 connected through the amplifier-shaper 9 to the input of the synchro-oscillator 10, block 11 decodiro ani, connected between the output transducer 5 and an output bus 12 of digital data, an adder 13, the voltages coupled to the inputs the outputs of blocks 3 and 4 and vghodom - the output bus 14 of the color video signal, a selector 15, a synchronization signal, the valve element 16.
    In addition, the device additionally contains a detector 17 of a vspodka signal, connected by the first input to the output of the synchronous generator 10, the second output to another input of the PLL unit 6 connected by the output with the output bus of the clock pulses. The detector 18 of the synchronization signal is connected by an input through selector-15 to the output of block 3 and the output to the input of the first inverter 19 and to the first input of the first element I 20, which is connected by output to the first output bus 21 of the auxiliary signal and the second input to the output of the second inverter 22 The third element I 23 is connected by inputs to the outputs of the synchronous generator 13 and converter 5 and the output to the second input of the detector 17 of the sweep signal connected to the second output of the second inverter 22 and connected to the third input of the second output element 16, which is connected by a second input to the output of the first inverter 19 and is connected by an output to the second output bus 24 of the auxiliary signal.
    The device works as follows.
    When the head 1 reproduces an analog signal (color video signal), block 3 selects a frequency-modulated signal from it and demodulates from the latter a good signal that goes to voltage adder 13. At the same time, in block 4, an inline-sequential signal is allocated to the orthogonal two-phase balanced modulation, which becomes a subcar that is modulated by a chroma signal in the NTSC system. This subcarrier also enters the adder 13. As a result, a color video signal is produced on the output bus 14. NTSC system.
    The digital signal reproduced by the head 1 is converted into parallel data by converter 5, and then into an 8-bit digital signal, from which unit 11 reconstructs the initial data sequence (DATE, Fig.2) and corrects errors using the PRTY code of redundancy and parity. The received digital data is fed to the bus 12.
    The pulse is generated by the PLL unit 6. The head 8 generates a pulse corresponding to the phase of rotation of the flexible disk with each turn of it. This impulse arrives at the synchro generator 10 to generate a window signal corresponding to the spacing interval for each block i (.2): track 2Т.
    The detector 17 consists of a frequency-to-voltage conversion circuit and a level detection circuit, it is associated with an AND 23 element, by means of which the presence of the BRST signal (Fig. 2) and the recording density of this signal are determined.
    From the luminous signal of block 3, the selector 15 selects a horizontal sync pulse, the presence of which is determined by the detector 18.
    The signal of the 7 step detector is used as a control signal for the compensation circuit (not shown) of the processing unit 3.
    signals of the luminance signal, as a pointer to the lack of digital data of the unit 1.1, as a tracking signal for the head 1, etc.
    The flag signal on bus 21 indicates that the reproduced signal represents digital data (value O) or a color video signal (value 1).
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A device for multi-track reproduction from a magnetic disk, containing the first magnetic head connected through a Bocripo amplifier to the inputs of a luminance signal processing unit, a chrominance signal processing unit, a serial-parallel code converter, a phase-tracking block, and a deposition detector connected to the output bus the signal of the presence of fallout, the second magnetic head connected through
    a shaper with a sync oscillator input, a decoding unit connected between a serial-parallel code converter output and digital data output bus., a voltage adder connected to the outputs of the luminance signal processing unit and the chrominance signal processing unit and connected with the output to the output bus color video signal selector
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    synchronization, valve element, elements And, inverters and first and second output buses of auxiliary signals, characterized in that, in order to reduce the error of multi-track reproduction, a ppsi signal detector, connected by a first input to the output of the synchronous generator, connected by a second output to another input is inserted into it a phase-locked frequency control unit connected by the output to the output bus of the clock pulses, and the detector is a synchronization signal connected by the input through the synchronizer signal selector and to the output unit of the luminance signal processing unit and connected to the input of the first inverter and the first input of the first element I, which is connected by output to the output bus of the auxiliary signal and the second input to the output of the second inverter, while the third element I is connected to the outputs of the clock generator and a serial-parallel code converter and is connected by an output to a second input of a psiPsi signal detector connected by a second output to an input of a second inverter and connected by a third output to the first input dy valve element which is connected the second input to the output of the first inverter and a second output connected to the output line of the auxiliary signal.
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    引用文献:
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    US3932894A|1974-03-14|1976-01-13|International Business Machines Corporation|Magnetic record member for use with rotating head magnetic recording apparatus|
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    US4424543A|1981-11-16|1984-01-03|Dma Systems Corporation|Method and apparatus for recording transducer positioning information|
    JPS5943676A|1982-09-06|1984-03-10|Hitachi Ltd|Electronic camera system|
    US4513331A|1982-10-12|1985-04-23|Dysan Corporation|Method and apparatus for disk drive alignment|JPH0654568B2|1984-10-31|1994-07-20|株式会社日立製作所|Automatic tracking controller for magnetic recording / reproducing apparatus|
    US5410527A|1985-05-14|1995-04-25|Canon Kabushiki Kaisha|Information recording/reproducing apparatus including setting optimum recording condition or reproducing condition|
    CA1325472C|1985-05-22|1993-12-21|Tsuguhide Sakata|Information recording system and apparatus|
    JPH07105112B2|1985-05-22|1995-11-13|キヤノン株式会社|Information recording method|
    JPH0640419B2|1985-05-28|1994-05-25|ソニー株式会社|Sync signal detection circuit|
    JPH0771255B2|1986-01-24|1995-07-31|ソニー株式会社|Playback device|
    US4829388A|1986-08-04|1989-05-09|Fuji Photo Film Co., Ltd.|Magnetic recording apparatus|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP59102056A|JPH065939B2|1984-05-21|1984-05-21|Magnetic disc identification circuit|
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