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：US4686583A

公开(公告)日：1987-08-11

申请号：US662453

申请日：1984-10-17

申请人： Masao Tomita ,  Akio Hashima ,  Haruo Ohta ,  Tadaaki Matsuo

发明人： Masao Tomita ,  Akio Hashima ,  Haruo Ohta ,  Tadaaki Matsuo

IPC分类号： G11B20/06 ,  H04N5/911 ,  H04N5/94 ,  H04N5/76

CPC分类号： H04N5/94 ,  H04N5/911

摘要： A dropout compensating apparatus used in a video signal recording/reproducing apparatus employs a digital delay circuit such as a digital memory. An input video signal is converted to a digital signal by an A/D converter. The digital signal is applied via a first switch to the digital delay circuit where it is delayed by a specified period. The delayed digital signal is converted to a delayed video signal by a D/A converter. The delayed video signal is applied to a second switch. A dropout detector produces a dropout detected signal when a dropout occurs in the input video signal. The first switch normally passes the digital signal from the A/D converter and is responsive to the dropout detected signal for passing the delayed digital signal from the digital delay circuit back to the digital delay circuit. The second switch normally passes the input video signal as it is and is also responsive to the dropout detected signal for passing the delayed video signal from the D/A converter.

摘要翻译： 在视频信号记录/再现装置中使用的压差补偿装置采用诸如数字存储器的数字延迟电路。 输入视频信号由A / D转换器转换为数字信号。 数字信号通过第一开关施加到数字延迟电路，在那里延迟指定的时间。 延迟的数字信号由D / A转换器转换成延迟的视频信号。 延迟的视频信号被施加到第二开关。 当输入视频信号中出现压差时，压差检测器产生一个压差检测信号。 第一开关通常通过来自A / D转换器的数字信号，并响应于压差检测信号，将延迟的数字信号从数字延迟电路传回数字延迟电路。 第二开关正常通过输入视频信号，并且还响应于用于从D / A转换器传递延迟的视频信号的压差检测信号。

公开(公告)号：US5991108A

公开(公告)日：1999-11-23

申请号：US804592

申请日：1997-02-24

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： G11B20/10 ,  G11B5/09

CPC分类号： G11B20/10009

摘要： In a recording and reproducing apparatus having a simultaneous reproducing function, an adaptive filter outputs a pseudo crosstalk signal which approximates to frequency characteristics of crosstalk components leaking from recording data into a reproduced signal, and a subtractor subtracts the pseudo crosstalk signal from the reproduced signal, thereby canceling the crosstalk components

摘要翻译： 在具有同时再现功能的记录和再现装置中，自适应滤波器输出近似于从记录数据泄漏到再现信号中的串扰分量的频率特性的伪串扰信号，并且减法器从再现信号中减去伪串扰信号， 从而消除串扰分量

公开(公告)号：US5265125A

公开(公告)日：1993-11-23

申请号：US791533

申请日：1991-11-14

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： G11B20/10 ,  H04L25/06 ,  H04L25/497 ,  H04L27/01

CPC分类号： G11B20/10009 ,  H04L25/061 ,  H04L25/066 ,  H04L25/497

摘要： A signal detection apparatus detects original information from a PCM signal transmitted through a communication channel or reproduced from a recording medium. The apparatus includes: a first equalizer for equalizing the PCM signal so as to decrease intersymbol interference, a clock regenerator for regenerating a clock signal synchronized with a timing of the digital information from an output of the first equalizer; an amplitude detector for detecting an amplitude from the output of the first equalizer and the clock signal; a second equalizer for equalizing the output of the first equalizer to a partial-response equalized signal, and a detecting circuit for detecting the original digital information at a clock timing of the clock signal from the partial-response equalized signal. Accordingly, without being influenced by the amplitude fluctuations of the signal, the original digital information can be detected at a low bit error rate.

摘要翻译： 信号检测装置从通过通信信道发送的PCM信号或从记录介质再现的PCM信号检测原始信息。 该装置包括：用于均衡PCM信号以减少符号间干扰的第一均衡器，用于从第一均衡器的输出再生与数字信息的定时同步的时钟信号的时钟再生器; 振幅检测器，用于从第一均衡器的输出和时钟信号中检测振幅; 第二均衡器，用于将第一均衡器的输出均衡到部分响应均衡信号;以及检测电路，用于在来自部分响应均衡信号的时钟信号的时钟定时处检测原始数字信息。 因此，在不受信号的振幅波动的影响的情况下，可以以低误码率检测原始数字信息。

公开(公告)号：US5051614A

公开(公告)日：1991-09-24

申请号：US356322

申请日：1989-05-23

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： H04N5/94 ,  G11B20/06 ,  G11B20/10 ,  G11B20/18

CPC分类号： G11B20/18 ,  G11B20/10009

摘要： A dropout detecting apparatus comprises a phase conversion circuit for converting an input signal into two signals which are different in phase by .pi./2 from each other, two squaring circuits for obtaining squares of the two signals respectively, an addition circuit for adding the two square signals, and an amplitude comparator for comparing the amplitude of an output signal of the addition circuit with a reference value. The output signal of the addition circuit becomes the square of the envelope of the input signal regardless of the phase of the input signal.

摘要翻译： 一种压差检测装置，包括：相位转换电路，用于将输入信号转换为相互不同的π/ 2的两个信号，分别获得两个信号的平方的两个平方电路;加法电路， 信号和用于将加法电路的输出信号的振幅与参考值进行比较的幅度比较器。 加法电路的输出信号成为输入信号的包络的平方，与输入信号的相位无关。

公开(公告)号：US4849826A

公开(公告)日：1989-07-18

申请号：US119069

申请日：1987-11-10

申请人： Haruo Ohta

发明人： Haruo Ohta

IPC分类号： H03G5/00 ,  H04N5/923

CPC分类号： H03G5/005 ,  H04N5/923

摘要： A digital non-linear pre-emphasis/de-emphasis apparatus is arranged such that a frequency band of a high-pass filter for extracting a high frequency component signal of an input signal is varied according to the input signal by feeding back the output signal of the high-pass filter through a first non-linear input/output circuit. The first non-linear input/output circuit multiplies the output signal of the high-pass filter by a coefficient which is a function of the output signal of the high-pass filter to obtain a feedback signal. The output signal of the high-pass filter is also applied to a second non-linear input/output circuit which multiplies the output signal of the high-pass filter by a coefficient which is a function of the output signal of the high-pass filter. An output signal of the second non-linear input/output circuit is mixed with the input signal by an operation circuit to obtain an output signal which is non-linearly emphasized or de-emphasized.

摘要翻译： 数字非线性预加重/去加重装置被布置成使得用于提取输入信号的高频分量信号的高通滤波器的频带根据输入信号而变化，通过反馈输出信号 的高通滤波器通过第一非线性输入/输出电路。 第一非线性输入/输出电路将高通滤波器的输出信号乘以作为高通滤波器的输出信号的函数的系数，以获得反馈信号。 高通滤波器的输出信号也被施加到第二非线性输入/输出电路，该第二非线性输入/输出电路将高通滤波器的输出信号乘以高通滤波器的输出信号的函数的系数 。 第二非线性输入/输出电路的输出信号通过运算电路与输入信号混合，以获得非线性强调或去强调的输出信号。

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 。