公开(公告)号：US20060221711A1

公开(公告)日：2006-10-05

申请号：US10554103

申请日：2003-12-11

申请人： Haruo Ohta ,  Takeshi Ohtsuka

发明人： Haruo Ohta ,  Takeshi Ohtsuka

IPC分类号： G11C7/10

CPC分类号： G06K7/0034 ,  G06K19/07741 ,  G06K19/07743

摘要： A semiconductor memory device according to the present invention comprises a hosing including a card bus connector for connection to a host device and having a PC card shape having the thickness of 5.0 mm, four SD memory cards (R: Registered trade mark) housed in the housing and a control circuit for controlling transmission/reception of a signal between the card bus connector and the respective SD memory cards (R: Registered trade mark). The semiconductor memory device is suitably used as a recording medium of the host device for which a higher data transfer rate and a larger memory capacity are demanded. Further, a semiconductor memory device, which is attachable and detachable relative to the host device and thereby portable, and relatively inexpensively obtainable, can be provided, and is directly insertable into a laptop personal computer to be used.

摘要翻译： 根据本发明的半导体存储器件包括一个包括用于连接到主机设备并且具有5.0mm厚度的PC卡形状的卡总线连接器的连接器，四个SD存储卡（R：注册商标） 壳体和控制电路，用于控制卡总线连接器和相应的SD存储卡之间的信号的发送/接收（R：注册商标）。 半导体存储器件适合用作要求更高数据传输速率和更大存储容量的主机设备的记录介质。 此外，可以提供相对于主机设备可附接和可拆卸并且相对便宜的半导体存储器件，并且相对便宜地可获得，并且可直接插入待使用的笔记本个人计算机中。

公开(公告)号：USRE39029E1

公开(公告)日：2006-03-21

申请号：US10349954

申请日：2003-01-24

申请人： Kouhei Baba ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

发明人： Kouhei Baba ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

IPC分类号： H04N5/93

CPC分类号： G11B5/53 ,  G11B5/0086 ,  G11B5/534 ,  G11B15/125 ,  G11B15/4675

摘要： A magnetic recording/reproducing apparatus is provided in which among diametrically oppositely disposed heads, a recording head and an erasing head of a same channel are disposed adjacently to each other. The recording head is disposed so as to precede by two tracks the erasing head with respect to a direction of cylinder rotation, when insert-editing, using a reproduced signal obtained by the recording head, erase and record timing setting and head tracking are performed and an erasing current is not applied during the reproduction by the recording head. The reproducing heads are disposed so as to be angularly apart by about 90 degrees from the recording and erasing heads, and a rotary transformer for reproduction is applied with a shield measure and then, formed as a core independently at an upper portion of the cylinder. In addition, more narrow tracks are compatibly reproduced by the recording head.

摘要翻译： 提供了一种磁记录/再现装置，其中在径向相对设置的头之间，相邻通道的记录头和擦除头彼此相邻设置。 记录头相对于气缸旋转方向设置在两个轨道之前，即擦除头，当使用由记录头获得的再现信号进行插入编辑时，执行擦除和记录定时设置和磁头跟踪， 在记录头的再现期间不施加擦除电流。 再现头被设置成与记录和擦除头成角度地分开约90度，并且用于再现的旋转变压器被施加屏蔽测量，然后在缸的上部独立地形成为芯。 此外，由记录头兼容地再现更窄的轨道。

公开(公告)号：US5535244A

公开(公告)日：1996-07-09

申请号：US252902

申请日：1994-06-02

申请人： Etsuto Nakatsu ,  Hiroshi Higashitani ,  Haruo Ohta

发明人： Etsuto Nakatsu ,  Hiroshi Higashitani ,  Haruo Ohta

IPC分类号： H04L27/38 ,  H04L5/12

CPC分类号： H04L27/3836

摘要： A digital modulating/demodulating apparatus includes a demodulator for demodulating a modulated signal into a demodulated positional signal in response to a receipt of the modulated signal, a decoder for decoding the demodulated positional signal into a digital signal of N bits. A previous signal point on the constellation plane is defined by a previous demodulated positional signal and a current signal point on the constellation plane is defined by a current demodulated positional signal. The decoder outputs a digital signal of N bits, based on en amplitude and a phase of the previous signal point and the amplitude and the phase of the current signal point.

摘要翻译： 数字调制/解调装置包括：解调器，用于响应于调制信号的接收，将调制信号解调为解调位置信号;解码器，用于将解调的位置信号解码为N位数字信号。 星座平面上的先前信号点由先前解调的位置信号定义，并且星座平面上的当前信号点由电流解调的位置信号定义。 解码器基于先前信号点的振幅和相位以及当前信号点的幅度和相位输出N位的数字信号。

公开(公告)号：US5233479A

公开(公告)日：1993-08-03

申请号：US591240

申请日：1990-10-01

申请人： Etsuto Nakatsu ,  Haruo Ohta ,  Masaaki Kobayashi

发明人： Etsuto Nakatsu ,  Haruo Ohta ,  Masaaki Kobayashi

IPC分类号： G11B20/06 ,  G11B20/10 ,  H04L27/38

CPC分类号： G11B20/06 ,  G11B20/10

摘要： An apparatus for demodulating and decoding a multi-level amplitude modulation signal used to convey digital data, such as a QAM signal, having amplitude modulated carrier components differing in phase. The apparatus derives demodulated data values from that signal, and derives from average values of sets of these data values a set of compensated reference point data respectively corresponding to signal reference points of the multi-level modulation signal which are expressible as a symbol constellation in the I-Q plane. The compensated reference point data are used to obtain correct digital code values from the demodulated data, even if there is considerable distortion of the multi-level amplitude modulated signal, as is the case for such a signal when recorded and reproduced from a magnetic recording medium.

摘要翻译： 一种用于解调和解码用于传送诸如QAM信号的数字数据的多电平幅度调制信号的装置，其具有相位不同的幅度调制载波分量。 该装置从该信号导出解调的数据值，并且从这些数据值的集合的平均值中导出分别对应于多电平调制信号的信号参考点的一组补偿参考点数据，这些参考点数据可表示为 智商飞机。 补偿参考点数据用于从解调数据获得正确的数字码值，即使在多电平幅度调制信号存在相当大的失真的情况下，如在从磁记录介质记录和再现时的这种信号的情况 。

公开(公告)号：US5633764A

公开(公告)日：1997-05-27

申请号：US365217

申请日：1994-12-28

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： H04N5/783 ,  G11B5/008 ,  G11B5/09 ,  G11B15/02 ,  G11B15/05 ,  G11B20/00 ,  G11B20/10 ,  G11B27/00 ,  G11B27/032 ,  G11B27/10 ,  G11B27/11 ,  G11B27/28 ,  H04N5/92 ,  H04N5/926 ,  H04N5/937 ,  G11B5/00

CPC分类号： G11B5/00813 ,  G11B15/026 ,  G11B15/05 ,  G11B20/10527 ,  G11B27/005 ,  G11B27/032 ,  G11B27/107 ,  G11B27/11 ,  H04N5/937 ,  G11B20/00007 ,  G11B2020/00079 ,  G11B2220/65 ,  G11B2220/90 ,  G11B5/0086 ,  H04N5/9261

摘要： A magnetic a tape recording/reproducing apparatus comprises a tape running unit, a recording and reproducing unit, a data memory, and a controller. The controller controls the tape running unit, the data memory and the recording and reproducing unit such that, in a recording mode, the input data are continuously written into the data memory at a first a data rate and the written data are intermittently read out from the data memory at a second data rate which is higher than the first data rate and intermittently recorded onto a magnetic tape, and that, in a reproduction mode, the recorded data are intermittently reproduced from the magnetic tape and intermittently written into the data memory at the second data rate and the written data are continuously read out from the data memory at the first data rate. The controller is responsive to indication information indicating that the tape is not in a recordable or reproducible position for stopping reading operation in the recording mode and writing operation in reproduction mode of the data memory and operation of the recording and reproducing unit and for controlling the tape running unit to transfer the tape to a recordable or reproducible position.

摘要翻译： 磁带式磁带记录/再现装置包括磁带运行单元，记录和再现单元，数据存储器和控制器。 控制器控制磁带运行单元，数据存储器和记录和再现单元，使得在记录模式下，以第一数据速率将输入数据连续地写入数据存储器，并且将写入的数据从 数据存储器以比第一数据速率高的第二数据速率并间歇地记录在磁带上，并且在再现模式中，从磁带间歇地再现记录的数据，并且间歇地写入数据存储器 以第一数据速率从数据存储器连续地读出第二数据速率和写入数据。 控制器响应于指示磁带不能在记录模式中停止读取操作的磁带的指示信息和数据存储器的再现模式下的写入操作以及记录和再现单元的操作以及用于控制磁带 运行单元将磁带转移到可记录或可重现的位置。

公开(公告)号：US5299003A

公开(公告)日：1994-03-29

申请号：US849332

申请日：1992-03-10

申请人： Atsuo Ochi ,  Masayuki Yoneyama ,  Yasuo Hamamoto ,  Akihiro Takeuchi ,  Masaaki Kobayashi ,  Haruo Ohta

发明人： Atsuo Ochi ,  Masayuki Yoneyama ,  Yasuo Hamamoto ,  Akihiro Takeuchi ,  Masaaki Kobayashi ,  Haruo Ohta

IPC分类号： H03F1/32 ,  H03G5/00 ,  H04N5/923 ,  H04N5/931 ,  H04N7/24 ,  H04N5/213

CPC分类号： H04N7/24 ,  H03F1/3241 ,  H03G5/005 ,  H04N5/923 ,  H04N5/9315

摘要： A signal processing apparatus for changing the frequency characteristics of an input signal, e.g.--a video or audio signal, allows a signal to pass through a transmission circuit in a positive time sequence and then, allows the signal to be transmitted through another transmission circuit having the same transmission characteristics in a reverse time sequence with respect to the positive time sequence. Also, while the transmission circuit is arranged to have a zero-phase characteristic, each segment of a continuous signal is processed throughout a period which is equal to at least two times a duration of an impulse response direction of the transmission circuit. Accordingly, unwanted wave errors appearing at discontinuous regions of the signals are eliminated.

摘要翻译： 用于改变例如视频或音频信号的输入信号的频率特性的信号处理装置允许信号以正时序顺序通过传输电路，然后允许信号通过具有 相对于正时序的反向时间序列具有相同的传输特性。 此外，当发送电路被布置为具有零相位特性时，连续信号的每个段在等于发送电路的脉冲响应方向的持续时间的至少两倍的周期内被处理。 因此，消除了在信号的不连续区域出现的不期望的波形误差。

公开(公告)号：US5255127A

公开(公告)日：1993-10-19

申请号：US724888

申请日：1991-07-02

申请人： Etsuto Nakatsu ,  Hiroaki Shimazaki ,  Haruo Ohta ,  Masaaki Kobayashi

发明人： Etsuto Nakatsu ,  Hiroaki Shimazaki ,  Haruo Ohta ,  Masaaki Kobayashi

IPC分类号： G11B20/10 ,  H03M13/39 ,  H04L1/00 ,  G11B5/09 ,  G11B20/06

CPC分类号： H04L1/0047 ,  G11B20/10009 ,  H03M13/39 ,  H04L1/0054

摘要： In transmission or recording of a digital signal by means of digital amplitude and phase modulation, particularly recording into and reproducing the same from the a magnetic recording medium, a digital amplitude/phase modulated signal to be demodulated is commonly affected by the non-linear amplitude characteristics and the effects of unwanted jitter and envelope variation. As the result, the error rate of decoded data will be increased. For compensation, the Viterbi decoding technique is employed with the use of a weighted distance value calculated by multiplying an Euclidean distance between the signal point of a reproduction signal and the datum point of each code by a positive weighting factor which is determined smaller when the code datum point is located further from the origin point of a coordinate system. Accordingly, the weighted distance of each reproduction signal point from its corresponding datum point can approximately be uniform thus ensuring less error decoding in general.

公开(公告)号：US4994754A

公开(公告)日：1991-02-19

申请号：US356327

申请日：1989-05-23

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： H03D3/00 ,  H04N5/92

CPC分类号： H03D3/007 ,  H04N5/92 ,  H03D3/006

摘要： A digital FM demodulating apparatus includes a phase detector for detecting the phase of an input digital FM signal; a differentiator for time differentiating the signal from the phase detector to get an instantaneous frequency of the input FM signal; an over-modulation detector for detecting an over-modulation occurence of the input FM signal according to the instantaneous frequency to generate a detection signal, and an over-modulation corrector for obtaining a demodulated output signal which is corrected so as to have no deterioration due to the over-modulation occurrence according to the detection signal from the over-modulation detector.

公开(公告)号：US4827342A

公开(公告)日：1989-05-02

申请号：US102243

申请日：1987-09-24

申请人： Haruo Ohta ,  Masao Tomita

发明人： Haruo Ohta ,  Masao Tomita

IPC分类号： H04N5/20 ,  H04M5/20 ,  H04N5/21 ,  H04N5/213

CPC分类号： H04N5/21

摘要： A video signal processing apparatus includes a digital vertical filter for passing a signal in a specific vertical high frequency band of a digitized input luminance signal and a digital nonlinear processing circuit having a nonlinear input-output characteristic for nonlinearly processing the signal from the vertical filter so that one of a luminance signal component and a noise component of the signal from the vertical filter is suppressed while the other is maintained as is or so that the luminance signal component is emphasized while the noise component is maintained as is or suppressed. The apparatus also includes an arithmetic operation circuit for arithmetically synthesizing the digitized input luminance signal and an output signal of the nonlinear processing circuit so that the noise component is canceled or the luminance signal is increased, thereby obtaining a digitized luminance signal having an improved signal-to-noise ratio in the specific vertical high frequency band.

摘要翻译： 视频信号处理装置包括用于使数字化输入亮度信号的特定垂直高频带中的信号通过的数字垂直滤波器和具有用于非线性处理来自垂直滤波器的信号的非线性输入输出特性的数字非线性处理电路， 抑制来自垂直滤波器的信号的亮度信号分量和噪声分量中的一个，同时保持另一个亮度信号分量和噪声分量，或者使亮度信号分量被强调，同时噪声分量保持原样或被抑制。 该装置还包括用于对数字化输入亮度信号和非线性处理电路的输出信号进行算术合成的算术运算电路，使得噪声分量被消除或亮度信号增加，从而获得具有改善的信号 - 特定垂直高频段的信噪比。

公开(公告)号：US4825289A

公开(公告)日：1989-04-25

申请号：US119065

申请日：1987-11-10

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： H04N5/21 ,  H04N5/93

CPC分类号： H04N5/21

摘要： A noise reduction apparatus includes a vertical filter for extracting a component having a high vertical frequency from an input video signal, a two-dimensional filter for extracting a component having a low vertical frequency and a high horizontal frequency from the input video signal, a detector for detecting a vertical line image portion from output components of the vertical filter and the two-dimensional filter, and a controllable two-dimensional filter which suppresses a component having a high vertical frequency at the vertical line image portion according to a detection signal from the dector. By this apparatus, the noise superposed on the vertical line image signal is effectively reduced without deteriorating the vertical resolution.

摘要翻译： 噪声降低装置包括：垂直滤波器，用于从输入视频信号中提取具有高垂直频率的分量;二维滤波器，用于从输入视频信号中提取具有低垂直频率和高水平频率的分量;检测器 用于从垂直滤波器和二维滤波器的输出分量检测垂直线图像部分，以及可控二维滤波器，其根据来自所述垂直滤波器的检测信号在垂直线图像部分处抑制具有高垂直频率的分量 切割器 通过该装置，叠加在垂直线图像信号上的噪声被有效地减小而不会降低垂直分辨率。