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29 条记录 (耗时 0.033 秒)

    Clock reproducing apparatus and data reproducing apparatus utilizing weighting-adding of samples
    22.
    发明授权
    Clock reproducing apparatus and data reproducing apparatus utilizing weighting-adding of samples 失效
    利用加权加权的时钟重放装置和数据再现装置

    公开(公告)号：US5526200A

    公开(公告)日：1996-06-11

    申请号：US221064

    申请日：1994-03-30

    申请人： Hiroaki Yada

    发明人： Hiroaki Yada

    IPC分类号： G11B19/02 ,  G11B19/12 ,  G11B20/10 ,  G11B20/14 ,  G11B27/30 ,  H04L7/02 ,  H04L7/10 ,  G11B5/09

    CPC分类号： G11B20/10037 ,  G11B19/02 ,  G11B19/12 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/1403 ,  G11B27/3027 ,  G11B2220/20

    摘要： A clock reproducing apparatus is adapted for reproducing a data existing point clock signal by using a reproduction signal obtained from a magnetic disc on which clock patterns for clock reproduction are recorded in servo areas discretely provided independent of data recording area, which comprises: a voltage controlled oscillator operative to oscillate the data existing point clock signal; a sampling circuit for sampling the reproduction signal in synchronism with the data existing point clock signal; a phase information generator for weighting-adding plural sample values before and after a reference sample value corresponding to the peak of a reproduced isolated waveform of the clock pattern to thereby generate phase information indicating a phase difference between the data existing point clock signal and a reproduction signal of the clock pattern; and a control voltage converter for converting phase information generated by the phase information generator to a control voltage for controlling the voltage controlled oscillator. Moreover, the clock reproducing apparatus further comprises a phase synchronization loop control circuit adapted to generate a phase comparison timing signal for allowing a sample value after a predetermined data existing point clock time from occurrence time of a signal which detects a unique pattern for recognizing an approximate existing time of the clock pattern. In addition, when there is employed a configuration to detect data in synchronism with the data existing point clock signal, a data recording apparatus is provided.

    摘要翻译： 时钟再现装置适用于通过使用从磁盘获得的再现信号来再现数据存在的点时钟信号，在磁盘上记录有用于时钟再现的时钟模式的再现信号被记录在独立于数据记录区域的伺服区域中，该伺服区域包括：电压控制 振荡器可操作以振荡数据存在的点时钟信号; 采样电路，用于与数据存在点时钟信号同步地采样再现信号; 相位信息发生器，用于在对应于时钟图形的再现隔离波形的峰值的参考采样值之前和之后对多个采样值加权相加，从而产生指示数据存在点时钟信号和再现之间的相位差的相位信息 时钟模式的信号; 以及用于将由相位信息发生器产生的相位信息转换为用于控制压控振荡器的控制电压的控制电压转换器。 此外，时钟再现装置还包括相位同步环路控制电路，其适于产生相位比较定时信号，用于允许在检测用于识别近似值的唯一图案的信号的发生时间之后的预定数据存在点时钟时间之后的采样值 时钟模式的现有时间。 此外，当采用与数据存在点时钟信号同步地检测数据的配置时，提供数据记录装置。

    Disk drive apparatus, and data processing method for use with disk drive apparatus
    23.
    发明授权
    Disk drive apparatus, and data processing method for use with disk drive apparatus 失效
    磁盘驱动装置以及用于磁盘驱动装置的数据处理方法

    公开(公告)号：US07177528B1

    公开(公告)日：2007-02-13

    申请号：US09632200

    申请日：2000-08-02

    申请人： Hiroaki Yada ,  Keitaro Yamashita

    发明人： Hiroaki Yada ,  Keitaro Yamashita

    IPC分类号： H04N11/00 ,  H04N7/26 ,  H04N5/91

    CPC分类号： H04N5/772 ,  G11B19/04 ,  G11B19/24 ,  G11B20/18 ,  G11B2020/10537 ,  G11B2020/183 ,  G11B2220/2516 ,  H04N5/781 ,  H04N5/907 ,  H04N9/8042

    摘要： A disk drive apparatus is provided which is capable of performing recording and playback processing of an AV data stream requiring real-time characteristics and processing in an operation mode suitable for battery driving. The construction is formed in such a way that a first operation mode in which a disk rotation speed is set to be low, to which error handling in which an upper limit of an error handling time is determined as an error processing method suitable for performing recording or playback of real-time continuous information is made to correspond, and a second operation mode in which the disk rotation speed is set to be high and in which retries can be performed repeatedly as an error processing method suitable for performing recording or playback of data having high reliability, can be set. Thus, lower power consumption of real-time continuous data processing in image recording and playback by battery driving, such as in a portable video camera, is realized.

    摘要翻译： 提供一种盘驱动装置，其能够在适于电池驱动的操作模式中执行需要实时特性和处理的AV数据流的记录和重放处理。 该结构形成为将盘旋转速度设定为低的第一操作模式，其中确定误差处理时间的上限的错误处理作为适于执行记录的错误处理方法 或者将实时连续信息的回放与第一操作模式相对应，并且其中盘旋转速度被设置为高并且可以重复执行重试的第二操作模式作为适于执行数据的记录或重放的错误处理方法 具有高可靠性，可设定。 因此，实现了在诸如便携式摄像机之类的电池驱动的图像记录和重放中的实时连续数据处理的较低功耗。

    Disk device having real-time and reliability recording modes including simultaneously recordable channels set using commands
    24.
    发明授权
    Disk device having real-time and reliability recording modes including simultaneously recordable channels set using commands 有权
    具有实时和可靠性记录模式的磁盘设备，包括使用命令设置的可同时记录的通道

    公开(公告)号：US06950381B2

    公开(公告)日：2005-09-27

    申请号：US10338262

    申请日：2003-01-08

    申请人： Hiroaki Yada ,  Hiroshi Kanno

    发明人： Hiroaki Yada ,  Hiroshi Kanno

    IPC分类号： G11B20/10 ,  G11B3/90 ,  G11B19/02 ,  G11B20/18 ,  H04N5/781 ,  H04N9/804 ,  H04N9/82 ,  G11B20/00

    CPC分类号： G11B20/1879 ,  G11B2020/10944 ,  G11B2020/183 ,  H04N5/781 ,  H04N9/8042 ,  H04N9/8227

    摘要： A disk recording/reproduction device ideal for processing audio-visual data streams requiring real-time characteristics. A disk device has an operating mode ideal for recording and reproduction of motion image and audio data requiring real-time continuity by limiting the time needed for error processing, and the host incorporating the disk device can easily monitor the real-time continuity. The host can specify the urgency of individual recording and reproduction instructions to the disk so that control of real-time continuity can be actively implemented in better detail. A means for assigning a total number to a plurality of simultaneously recorded or reproduced data streams as well assigning individual data stream numbers allows informing the disk device of the throughput required by the host.

    摘要翻译： 适用于处理需要实时特性的视听数据流的磁盘记录/再现装置。 磁盘装置具有理想的操作模式，用于通过限制错误处理所需的时间来记录和再现需要实时连续性的运动图像和音频数据，并且包含盘装置的主机可以容易地监视实时连续性。 主机可以指定对磁盘的单独记录和再现指令的紧急性，以便更好地实施对实时连续性的控制。 用于将总数分配给多个同时记录或再现的数据流以及分配各个数据流号的装置允许向盘设备通知主机所需的吞吐量。

    Clock generator and disk drive
    25.
    发明授权
    Clock generator and disk drive 失效
    时钟发生器和磁盘驱动器

    公开(公告)号：US06226139B1

    公开(公告)日：2001-05-01

    申请号：US09092952

    申请日：1998-06-08

    申请人： Hiroaki Yada

    发明人： Hiroaki Yada

    IPC分类号： G11B509

    CPC分类号： G11B20/10037 ,  G11B5/59616 ,  G11B5/59688 ,  G11B20/1403 ,  G11B27/24 ,  G11B27/3027 ,  G11B2220/20

    摘要： A clock generator applicable to a sample servo type magnetic disk drive is disclosed. Reproduced signals z(t) from a clock pattern are digitized by an A/D converter (33) before being fed to a phase comparator (52). An arithmetic unit (61) calculates an inner product of N sampled values and N weighting factors in a linear combination, and a D flip-flop (62) provides a phase comparison error signal f(&thgr;). The signal f(&thgr;) is converted by a D/A converter (53) to analog format before being supplied as a control signal to a VCO (51) via a loop filter (54). A clock signal CLK from the VCO (51) is controlled in phase so as to generate a clock signal CLK synchronized with the reproduced signals z(t). When the weighting factors are arranged so that their total sum becomes zero, the signal f(&thgr;) is free from adverse effects of DC elements superposed on the reproduced signals z(t), whereby a clock signal CLK in precise synchronism with the reproduced signal z(t) is obtained.

    摘要翻译： 公开了适用于样品伺服型磁盘驱动器的时钟发生器。 在馈送到相位比较器（52）之前，由A / D转换器（33）将来自时钟模式的再现信号z（t）数字化。 算术单元（61）以线性组合计算N个采样值和N个加权因子的内积，并且D触发器（62）提供相位比较误差信号f（θ）。 信号f（θ）由D / A转换器（53）转换为模拟格式，然后经由环路滤波器（54）作为控制信号提供给VCO（51）。 来自VCO（51）的时钟信号CLK被相位地控制，以产生与再现信号z（t）同步的时钟信号CLK。 当加权因子被布置为使得它们的总和变为零时，信号f（θ）没有叠加在再现信号z（t）上的DC元素的不利影响，从而与再现信号精确同步的时钟信号CLK z（t）。

    Digital signal processing circuit
    26.
    发明授权
    Digital signal processing circuit 失效
    数字信号处理电路

    公开(公告)号：US06215833B1

    公开(公告)日：2001-04-10

    申请号：US08963122

    申请日：1997-10-28

    申请人： Hiroaki Yada

    发明人： Hiroaki Yada

    IPC分类号： H04L2540

    CPC分类号： H04L1/0054 ,  H04L25/05

    摘要： A digital signal processing circuit comprising a memory means for storing a digital signal obtained from a playback channel; a control means for writing the digital signal in the memory means at a first rate and reading out the digital signal from the memory means at a second rate lower than the first rate; and a processing means for executing a desired process relative to the digital signal thus read out from the memory means. The digital signal is written in the memory means at a first rate by the memory control means and is read out therefrom at a second rate lower than the first rate. And then a desired signal process is executed relative to the digital signal read out from the memory means. Therefore the required digital processing rate becomes lower than the transmission rate of the playback channel, whereby the transmission rate can be raised despite the condition that the time required for the desired signal process such as demodulation is rendered longer.

    摘要翻译： 一种数字信号处理电路，包括存储装置，用于存储从重放通道获得的数字信号; 控制装置，用于以第一速率将数字信号写入存储装置，并以低于第一速率的第二速率从存储装置读出数字信号; 以及处理装置，用于相对于从存储装置读出的数字信号执行所需的处理。 数字信号由存储器控制装置以第一速率写入存储装置，并以低于第一速率的第二速率读出。 然后相对于从存储器装置读出的数字信号执行期望的信号处理。 因此，所需的数字处理速率变得低于重放通道的传输速率，由此尽管使诸如解调的期望的信号处理所需的时间变长，但是可以提高传输速率。

    Disk recording and/or reproducing apparatus that compensates for bit nonlinearity and a phase shift introduced by separate read and write heads
    28.
    发明授权
    Disk recording and/or reproducing apparatus that compensates for bit nonlinearity and a phase shift introduced by separate read and write heads 失效
    磁盘记录和/或再现装置，其补偿位非线性和由单独的读写头引入的相移

    公开(公告)号：US5600501A

    公开(公告)日：1997-02-04

    申请号：US531014

    申请日：1995-09-20

    申请人： Takamichi Yamakoshi ,  Nobuhiro Hayashi ,  Hiroaki Yada

    发明人： Takamichi Yamakoshi ,  Nobuhiro Hayashi ,  Hiroaki Yada

    IPC分类号： G11B20/10 ,  G11B5/09 ,  G11B20/14

    CPC分类号： G11B5/09 ,  G11B20/10212 ,  G11B20/1403

    摘要： There is disclosed a magnetic disk device of the external synchronization system using a head assembly of the recording/reproducing heads separation type. This magnetic device comprises: a reproducing head for reproducing data from a magnetic disk; a clock signal generator for generating a clock signal on the basis of a reproduced signal corresponding to a clock pattern from the reproducing head; a delay circuit for delaying recording data relative to the clock signal generated at the clock signal generator; a recording head for recording the recording data delayed by the delay circuit onto the magnetic disk; a position detecting circuit for detecting head position information (e.g., track number) in a disk radial direction of the recording head on the basis of the reproduced signal from the reproducing head; and a control circuit for controlling a quantity of delay of the delay circuit on the basis of head position information from the position detecting circuit and a predetermined magnetization reversal pattern.

    摘要翻译： 公开了使用记录/再现头分离型的头组件的外部同步系统的磁盘装置。 该磁性装置包括：用于从磁盘再现数据的再现头; 时钟信号发生器，用于根据与来自再现头的时钟模式相对应的再现信号产生时钟信号; 延迟电路，用于相对于在时钟信号发生器处产生的时钟信号延迟记录数据; 用于将由延迟电路延迟的记录数据记录到磁盘上的记录头; 位置检测电路，用于根据来自再现头的再现信号来检测记录头的磁盘径向的磁头位置信息（例如磁道号）; 以及控制电路，用于根据来自位置检测电路的磁头位置信息和预定的磁化反转模式来控制延迟电路的延迟量。