• 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 data reproducing apparatus for reproducing data recorded on multi-tracks, comprises a signal transducer for simultaneously reproducing pre-recorded frame signals from a plurality of tracks on a recording medium, a write-in address generating circuit provided in each of transmission systems for reproduced signals from the tracks obtained in parallel from the signal transducer, for generating a write-in address indicating the number of bits of data within one frame signal from a counter which counts clock pulses having a period equal to the transmission bit rate, a memory into which data within frame signals reproduced from the tracks are written and then read out, and a memory control circuit for controlling the memory so as to successively and recursively apply the data within the frame signals reproduced from the tracks and write in the data at the write-in addresses obtained from the write-in address generating circuit, and read out the written-in data from the memory with the timing arranged after a predetermined time has elapsed.
    公开号:SU1131483A3
    申请号:SU823501697
    申请日:1982-10-12
    公开日:1984-12-23
    发明作者:Ямада Ясухиро；Мори Такаро
    申请人:Виктор Компани Оф Джапэн,Лтд.(Фирма)；
    IPC主号:
    专利说明:

    one through a third additional buffer element with three stable states to the third input of the memory unit connected via a fourth or additional buffer element with three stable states to the first output of the fourth counter connected to the output bus of the address of the recording track, the second output of the third the counter is connected to the input of the fifth counter, the output of which is connected to the third input of the second counter, to the input of the sixth counter, to the fourth, to the input of the memory unit, to the control inputs of the first, second, third of additional buffer and fourth elements with three stable states according to the second input and
    the decoder, each of the outputs of which are connected to control inputs of the first, second and third buffer elements with three stable states of one of the transducers of the playback result from the recording track, the output of the sixth counter connected to the input of the fourth counter connected to the second output of the first counter , and in each converter of the playback result from the recording track, the input bus for playback of frame signals is connected to the input of the synchronization definition unit connected to the output Wires to the second input of the clock counter and to the input of the code error detection unit.
    The invention relates to the field of magnetic recording, in particular to devices for multi-track reproduction of digital data from magnetic recording media.
    A device for multi-loop playback of digital data from a magnetic recording medium is known, which contains transducers for playback from a recording track. The known device with the relative simplicity of its design allows for multi-track. playback of digital data from magnetic recording media 1.
    The disadvantage of this device is that it does not allow multi-track reproduction of digital data recorded with high density on a magnetic recording medium.
    Closest to the invention is a device for multi-track reproduction of digital data from a magnetic recording medium, containing transducers of the reproduction result from a recording track, each of which is equipped with first, second and third buffer elements with three, stable states and an input bus of clock pulses, counters , memory block, decoder, trigger, the output of which is connected to the output bus of control pulses, the output bus of the address of the recording track, the input bus of the address of the recording tracks, the bus and GOVERNMENTAL, bus error flag and an address bus. This device allows multi-track reproduction of digital data recorded at a relatively high density on a C2J magnetic recording medium.
    A disadvantage of the known device is the significant error of multi-track reproduction of digital data from a magnetic recording medium. This is due to the significant error that occurs due to a change in the mutual arrangement of the working gaps of the magnetic heads relative to the recording tracks during playback, relative to their relative position in the recording.
    The purpose of the invention is to reduce the error of multi-track reproduction of digital data from a magnetic recording medium.
    The goal is achieved in that a device for multi-track playback from a magnetic recording medium, containing transducers of a playback result from a recording track, each of which is equipped with a first second and third buffer elements with three stable states and an input clock bus, counters, memory block , a decoder, a trigger, the output of which is connected to the output bus of control pulses, the output bus of the address of the recording track,
    the input bus of the recording track addresses, the data bus, the error flag bus and the address bus, a cyclic control sign selector block entered, performed with the output bus of the result of code error detection and connected to the input codes of the first buffer elements with three stable states connected to the bus an error flag, and additional buffer elements with three steady states, and each converter of the playback result from the recording track is provided with a clock counter connected by a first input to the input by the bus of clock pulses and connected output through the second buffer element with three stable states to the address bus and to the first input of the memory unit, the code error detection unit connected by the output to the input of the first buffer element with three stable states and output from a bus of reproduced frame signals, connected via a third buffer element with three stable states to the data bus and to the second input of the memory unit, and a synchronization determination unit, npH, than the output of the clock counter x pulses from one of the transducers of the playback result from the recording track are connected to the first input of the first one, the counter made with the output bus of the word address, to the first input of the second counter and to the trigger input whose output is connected through the first additional buffer element with three stable states to the address bus connected via the second additional buffer element with three stable states to the output of the second counter, the input address bus of the recording tracks is connected to the second input of the second the counter and the first input of the third counter, the first output of which is connected to the first input of the decoder and connected via the third additional buffer element with three stable states to the third input of the memory unit connected through the fourth additional buffer element with three stable conditions the first output of the fourth counter, connected to the output bus of the address of the recording track, the second output of the third counter connected to the input of the fifth counter, the output of which is connected to the third input of the second center to the input of the sixth counter, to the fourth input of the memory block, to the control inputs of the first, second, third and fourth additional buffer elements with three stable states and to the second input of the decoder, each of which codes are connected to the control inputs of the first , the second and third buffer elements with three stable states of one of the transducers of the playback result from the recording track, the output of the sixth counter is connected to the input of the fourth counter, connected by a second output to the second the input of the first counter, and in each converter of the playback result from the recording track, the input bus of the reproduced frame signals is connected to the input of the synchronization determination unit connected by the outputs to the second input of the clock counter and to the input of the code error detection unit.
    The proposed device due to the introduction of a cyclic control sign selection block and additional buffer elements with three stable states, as well as due to the fact that each converter of the playback result from the recording track is equipped with a clock pulse counter, a code error detection block and a synchronization block It allows to significantly reduce the error of multi-track playback of digital data from a magnetic recording medium.
    The drawing shows one of the possible variants of the proposed device for multi-track reproduction of digital data from a magnetic recording medium.
    The proposed device comprises a trigger 1, the output of which is connected to the output bus 2 of control pulses, and the transducers of the replay of the playback from the recording track. Moreover, each transducer of the playback result from the recording track is equipped with first, second and third buffer elements 3-5 with three stable states, a counter of 6 clock pulses, a code error detection unit 7, a clock detection unit 8 and an input clock bus 9. The proposed device also includes a cyclic coxol symbol selection unit 10 made with the output bus 11 of the error code determination result and the input connected to the outputs of the first buffer elements 3 with three stable states, and the first, second, third and fourth additional buffer elements 12, 13 , 14 and 15 with three stable states. Moreover, the outputs of the first bu, ferrous elements 3 with three stable states are connected to the bus 16 of the error flag. In the proposed device, in each transducer of reproduction results from the recording track, a counter of 6 clock pulses is connected to the address bus 17 and to the first input of the block by the first input to the input bus 9 clock pulses and connected to the output through the second buffer element 4 with three stable states 18 memory. The code error detection unit 7 is connected by an output to the input of the first buffer element 3 with three stable states and is provided with an input bus of 19 reproduced frame signals connected via thirds of the buffer element 5 with three stable states to the data bus 20 and the second the input of the .18 memory block. The input bus 19 of the reproduced frame signals is also connected to the input of the synchronization definition unit 8 connected by the outputs to the second input of the clock counter 6 and to the input of the error detection unit 7 code. In the proposed device, the output of the clock counter 6 of one of the transducers of the playback result from the track is recorded under It is connected to the first input of the first counter 21, made with the output address bus 22, to the first input of the second counter 23 and to the trigger input 1, the trigger output 1 is connected via the first Additional buffer element 12 with three stable states to the address bus 17. Address bus 17 is connected via the second 4836 additional buffer element 13 with three stable states to the output of the second counter 23. The proposed device also contains an input bus 24 addresses recording tracks connected to the second input of the second counter 23 and to the input of the third counter 25. The first output of the third counter 25 is connected to the first input of the decoder 26 and connected through the third additional buffer element 14 with three stable These are the states to the third input of the memory block 18, made with the output bus 27 of the data of half a word. The third input of the memory unit 18 is connected via the fourth additional buffer element 15 with three stable states to the first output of the fourth counter 28 connected to the output track address bus 29 of the recording track. In the proposed device, the second output of the third counter 25 is also connected to the input of the fifth counter 30, the output of which is connected to the third input of the second counter 23 and to the input of the sixth counter 31. The output of the sixth counter 31 is connected to the input of the fourth counter 28 connected by the second output to the second input first counter 21. The output of fifth counter 30 is connected to the fourth input of memory block 18, to the control inputs of the first, second, third and fourth additional buffer elements 12, 13, 14 and 15 with three steady states and to the second at the decoder 26. Each of the outputs of the decoder 26 is connected via bus 32 to control inputs of the first, second and third buffer elements 3, 4 and 5 with three stable states of one of the transducers of the playback result from the recording track. A multi-track reproduction of digital data from a magnetic recording medium by means of the proposed device proceeds as follows in each transducer of the result from the recording track, the reproduced frame signal is fed to the error code detection unit 7 and the synchronization definition unit 8. The synchronization determination unit 8 resets the code error limit block 7 and clears the 6 clock pulse counter, the signal of the code error detection block 7 occurs via the first buffer element 3 with three stable states to the cyclic control sign selector 10, and the clock signal 6 the pulses h are reproduced by a frame signal, respectively, through the second and third buffer elements 4 and 5 with three steady states to the first and second inputs of the memory block 18. The signals of the code error detection unit 7 and the counter of 6 clock pulses and the reproduced frame signal through the first, second and third buffer elements 3, 4 and 5 with three steady states occur when the resolving potentials arrive at them via buses 32 from the outputs descramble 20
    pa26. BACKGROUND the decoder 26 is affected by a third counter 25, which generates a signal, selects a recording track, and a fifth counter 30, which generates a timing signal for the write and read processes. Fifth counter
    30 also controls the second counter 23, the memory block 18 and the first, second, third and fourth additional buffer elements 12, 13, 14 and 15 with three steady states and operates through the sixth counter
    31to the fourth counter 28, the read readout signal is selected1
    recording horns and trigger 1. The trigger 1 and second counter 23 signals, if there is a resolving potential from the fifth counter 30, pass to the first and fourth inputs of block 18 via the first and second additional buffer elements 12 and 13, respectively, with three stable states nor mi. . .
    The use of the invention makes it possible to significantly reduce the error of multi-track reproduction of digital data from a magnetic recording medium. 3 - 8 th track record. The signal of the fourth counter 28 in the presence of the resolving potential from the sixth counter 31 passes through the fourth additional buffer element 15 with three stable states to the third input of the memory block 18, to which, in the absence of this resolving potential, passes through the third additional buffer element 14 with three stable states, the signal of the third counter 25. The counter signal 6 clock pulses of one of the transducers of the playback result from the recording track is fed to the first counter 21, to which the fourth counter 28 is active, the second counter, to which the address signal is applied
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    权利要求:
    Claims (1)
    [1]
    DEVICE FOR MULTI-DIGITAL PLAYBACK OF DIGITAL DATA FROM THE MAGNETIC RECORDING MEDIA, containing converters of the result of playback from the recording track, each of which is equipped with first, second and third buffer elements with three stable states and an input clock bus, counters, three memory, the output of which is connected to the output bus of control pulses, the output bus of the address of the recording track, the input bus of the address of the recording tracks, the data bus, the error flag bus and the address bus, exc which means that, in order to reduce the error of multitrack playback of digital data, it includes a cyclic control character selection box executed with the output bus of the result of determining the code error and connected to the outputs of the first buffer elements with three stable states connected to the flag bus errors, and additional buffer elements with three stable states, and each converter of the playback result from the recording track is equipped with a clock counter connected the first input with the input clock bus and the connected output through the second buffer element with three stable states to the address bus and to the first input of the memory block, the code error detection unit, the connected output to the input of the first buffer element with three stable states and executed with the input bus reproduced frame signals connected through a third buffer element with three stable states to the data bus and to the second input of the memory unit, and the synchronization determination unit, and in the output of the clock counter of one of the converters of the playback result from the recording track is connected to the first input of the first counter made with the output word address bus, to the first input of the second counter and to the trigger input, the output of which is connected through the first additional buffer element with three stable states to the address a bus connected through a second additional buffer element with three stable states to the output of the second counter, the input bus of the address of the recording tracks is connected to the second to the second input of the second counter and to the first input of the third counter, the first output of which is connected to the first input of the decoder and the subSU „1131483 is connected through the third additional buffer element with three stable states to the third input of the memory block connected through the fourth additional buffer element with three stable states to the first output of the fourth counter connected to the output bus address of the recording track, the second. The output of the third counter is connected to the input of the fifth counter, the output of which is connected to the second counter input to the sixth counter input, to the fourth, memory block input, to the control inputs of the first, second, third and fourth additional buffer elements with three stable states and to the second input of the decoder, each of which outputs is connected to the control inputs of the first, the second and third buffer elements with three stable states of one of the transducers of the playback result from the recording track, the output of the sixth counter is connected to the input of the fourth counter connected to the second th output to the second input of the first counter, and the result in each transducer playback track record playback human input bus signals connected to an input of the synchronization detection unit, connected to the outputs of the second input clock counter and to determine the entry code error block.
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP56163122A|JPH043025B2|1981-10-13|1981-10-13|
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