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41.发明授权Digital signal magnetic recording/reproducing apparatus using multi-level QAM modulation and maximum likelihood decoding 失效使用多级QAM调制和最大似然解码的数字信号磁记录/再现装置
公开(公告)号：US5095392A
公开(公告)日：1992-03-10
申请号：US302325
申请日：1989-01-27
CPC分类号： H03M13/41 , G11B20/1496 , G11B20/1809 , G11B20/1833 , G11B5/09 , H03M13/25 , H03M13/39 , H03M5/20 , H04L27/3438 , H04N5/926
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into multi-value digital signals and performs recording/reproducing of a multi-value quadrature amplitude-modulated signal. By using the multi-value quadrature amplitude modulation, it is possible to remove the DC component in the recording signal and improve the utilization efficiency of the recording frequency band. Further, using a system to memorize the frequency characteristic of the magnetic recording/reproducing unit and effect Viterbi decoding regarding the intersymbol interference caused by the frequency as a convolutional coding, it is possible to detect the level without necessitating frequency equalization. Accordingly, there arises no deterioration of the S/N ratio by frequency equalization. Furthermore, by providing an encoder for error control coding by increasing the number of multi-values and a corresponding decoder, the error rate can be improved against the deterioration of the S/N ratio. Further, by bias recording the multi-value quadrature amplitude modulated signal, non-linearity of the electromagnetic conversion system is relaxed, and deterioration of the S/N ratio by distortion is improved.
摘要翻译： 数字信号磁记录/再现装置将数字信号转换为多值数字信号，并执行多值正交幅度调制信号的记录/再现。 通过使用多值正交幅度调制，可以去除记录信号中的DC分量并提高记录频带的利用效率。 此外，使用系统来存储磁记录/再现单元的频率特性，并且将由频率引起的码间干扰作为卷积编码进行维特比解码，可以在不需要频率均衡的情况下检测电平。 因此，通过频率均衡不会导致S / N比的恶化。 此外，通过提供用于通过增加多值的数量的差错控制编码的编码器和相应的解码器，可以相对于S / N比的劣化来提高错误率。 此外，通过偏置记录多值正交幅度调制信号，电磁转换系统的非线性松弛，并且通过失真降低S / N比。
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公开(公告)号：US5078156A
公开(公告)日：1992-01-07
申请号：US649588
申请日：1991-01-18
申请人： Norio Furuya , Shinji Kaneda , Masaaki Kobayashi , Kenichi Nomura
发明人： Norio Furuya , Shinji Kaneda , Masaaki Kobayashi , Kenichi Nomura
CPC分类号： A24B3/14
摘要： A sheet tobacco producing apparatus comprises a mixer, a kneader, a crusher, and a shaping machine. The mixer mixes tobacco chips with auxiliary substances including water, to produce wet round pieces. The kneader has a pair of rollers for kneading the wet round pieces to form a sheet intermediate. The crusher crushes the sheet intermediate to form crushed wet round pieces. The shaping machine has a pair of rollers for forming a final sheet product from the crushed pieces. Since the tobacco raw material is deformed from the sheet intermediate which is obtained after once kneaded, to round pieces again, it is easy to take the material iinto the gap between the rollers of the shaping machine, whicn increases the manufacturing speed of the apparatus.
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公开(公告)号：US5062007A
公开(公告)日：1991-10-29
申请号：US450997
申请日：1989-12-15
申请人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
CPC分类号： G11B20/10
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into a multi-value digital signal, followed by recording/reproducing the quadrature biphase modulated multi-value quadrature amplitude modulated signal. By using a multi-value quadrature amplitude modulation, a direct current component in the recorded signal can be eliminated, and the utilization efficiency of the recording frequency band of the digital signal magnetic recording/reproducing apparatus can be improved. Also, with respect to the amplitude non-linear characteristic which occurs in the magnetic recording/reproducing process, by providing a compensating circuit during the mapping before recording or after reproducing and demodulating, the deterioration of the S/N ratio of the reproduced and demodulated signal can be reduced to decrease the errors in the decoded data. Furthermore by bias-recording the multi-value quadrature amplitude modulation signal, the non-linearity of the electromagnetic conversion system is alleviated to decrease the deterioration of the S/N ratio due to distortion, thereby making the application of the modulation scheme more reliable.
摘要翻译： 数字信号磁记录/再现装置将数字信号转换为多值数字信号，随后记录/再现正交双相调制多值正交幅度调制信号。 通过使用多值正交幅度调制，可以消除记录信号中的直流分量，并且可以提高数字信号磁记录/再现装置的记录频带的利用效率。 此外，关于在磁记录/再现处理中发生的振幅非线性特性，通过在记录之前或再现和解调之后的映射期间提供补偿电路，再现和解调的S / N比的恶化 可以减少信号以减少解码数据中的误差。 此外，通过对多值正交幅度调制信号进行偏置记录，可以减轻电磁转换系统的非线性，以减少由于失真引起的S / N比的恶化，从而使得调制方案的应用更可靠。
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公开(公告)号：US4873583A
公开(公告)日：1989-10-10
申请号：US943200
申请日：1986-12-18
CPC分类号： G11B15/02 , H04N9/79 , H04N9/7921
摘要： A magnetic tape recording/reproducing apparatus comprises a recording signal processing section, a head section, and a reproduced signal processing section. The recording signal processing section comprises a plurality of recording signal processing circuits each for converting a video signal to one or more recordable signals, and a first switch circuit for selectively connecting one of the recording signal processing circuits to the head section. The head section has a plurality of magnetic heads mounted on a single rotary cylinder for recording the recordable signals on a magnetic tape and reproducing the recorded signals from the magnetic tape. The reproduced signal processing section comprises a plurality of reproduced signal processing circuits each for converting the reproduced signals to the original video signal, a second switch circuit for selectively connecting one of the reproduced signal processing circuits to the head section, and a recognition circuit for recognizing what kind of signals are reproduced from the head section and producing a control signal for controlling the second switch circuit.
摘要翻译： 磁带记录/再现装置包括记录信号处理部分，头部部分和再现信号处理部分。 记录信号处理部分包括多个用于将视频信号转换成一个或多个可记录信号的记录信号处理电路，以及用于选择性地将一个记录信号处理电路连接到头部的第一开关电路。 头部具有安装在单个旋转圆筒上的多个磁头，用于将可记录信号记录在磁带上并再现来自磁带的记录信号。 再现信号处理部分包括多个再现信号处理电路，每个再现信号处理电路用于将再现信号转换为原始视频信号，第二开关电路用于选择性地将再现信号处理电路中的一个连接到头部，以及识别电路，用于识别 从头部再现什么样的信号，并产生用于控制第二开关电路的控制信号。
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45.发明授权System for connecting a video signal recording/reproducing apparatus and a television receiver 失效用于连接视频信号记录/再现装置和电视接收机的系统
公开(公告)号：US4864421A
公开(公告)日：1989-09-05
申请号：US092878
申请日：1987-09-03
申请人： Yoshihiro Morioka , Masaaki Kobayashi , Akihiro Takeuchi , Yoshitomi Nagaoka , Noriaki Gentsu , Sakon Nagasaki
发明人： Yoshihiro Morioka , Masaaki Kobayashi , Akihiro Takeuchi , Yoshitomi Nagaoka , Noriaki Gentsu , Sakon Nagasaki
摘要： In a system for connecting a video signal recording/reproducing apparatus and a color TV receiver, two component signals--a luminace signal and a carrier chrominance signal--are transmitted separately from each other from the video signal recording/reproducing apparatus to the TV receiver. The video signal recording/reproducing apparatus has first and second output terminals for respectively outputting luminance and carrier chrominance signals obtained from a color video signal reproduced from a recording medium. The color TV receiver has first and second input terminals adapted to be respectively connected to the first and second output terminals of the video signal recording/reproducing apparatus for receiving the luminace and carrier chrominance signals. The color TV receiver may be provided with a switching circuit for selecting a composite video signal received in the conventional manner or the separately received two component signals.
摘要翻译： 在用于连接视频信号记录/再现装置和彩色TV接收机的系统中，将两个分量信号 - 亮度信号和载波色度信号 - 从视频信号记录/再现装置彼此分离地发送到TV接收机。 视频信号记录/再现装置具有用于分别输出从从记录介质再现的彩色视频信号中获得的亮度和载波色度信号的第一和第二输出端。 彩色TV接收机具有适于分别连接到视频信号记录/再现装置的第一和第二输出端的第一和第二输入端，用于接收亮度和载波色度信号。 彩色TV接收机可以设置有用于选择以常规方式接收的复合视频信号或单独接收的双分量信号的切换电路。
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公开(公告)号：US4754145A
公开(公告)日：1988-06-28
申请号：US853290
申请日：1986-04-17
申请人： Masaaki Kobayashi
发明人： Masaaki Kobayashi
CPC分类号： G01T1/2016
摘要： A radiation image erase unit erases a remaining radiation image from a stimulable phosphor sheet by exposing the same to erasure light after reading out a radiation image stored thereon by applying stimulating light to the stimulable phosphor sheet to cause the same to emit light representative of the radiation image and detecting and converting the light emitted from the stimulable phosphor sheet photoelectrically to an electric signal. When the illuminance of the erasure light emitted from erasing light sources is lowered, or one or more of the erasing light sources fail to be energized, the stimulable phosphor sheet is controlled to remain in the radiation image erase unit during a time dependent on the reduction in the illuminance of the erasure light. Any remaining radiation image is thus completely erased from the stimulable phosphor sheet in preparation for the recording of a next radiation image thereon.
摘要翻译： 放射线图像擦除单元通过将可吸收的荧光体片上的激光照射到可刺激的荧光体片上，使其能够发出表示辐射的光，从而将可吸收的荧光体片的剩余的放射线图像曝光， 图像，并且将从可刺激的荧光体片发出的光光电检测和转换为电信号。 当擦除光源发出的擦除光的照度降低，或者一个或多个擦除光源不能通电时，可激励的荧光体片被控制为在依赖于还原的时间内保留在放射线图像擦除单元中 在擦除光的照度下。 因此，为了在其上记录下一个辐射图像，任何剩余的辐射图像被完全从可刺激的磷光体片上擦除。
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公开(公告)号：US4704639A
公开(公告)日：1987-11-03
申请号：US842802
申请日：1986-03-21
IPC分类号： H04N9/83
CPC分类号： H04N9/83
摘要： A video signal reproduction apparatus for reproducing a composite color video signal from a recording medium. A signal reproduced from the recording medium is divided into a frequency-modulated (FM) signal and a low-band-converted signal by filters. The FM signal is demodulated by a demodulater into a luminance signal. A first conversion circuit produces from the low-band-converted signal a chrominance signal without a phase jitter component. A second conversion circuit produces from the low-band-converted signal a high-band component of luminance signal with a same phase jitter component as that of the luminance signal obtained from the demodulator. The luminance signal from the demodulator, the high-band component of luminance signal and the chrominance signal are mixed to obtain the composite color video signal.
摘要翻译： 一种用于从记录介质再现合成彩色视频信号的视频信号再现装置。 从记录介质再现的信号通过滤波器被分成调频（FM）信号和低频带转换信号。 FM信号由解调器解调成亮度信号。 第一转换电路从低频带转换信号产生没有相位抖动分量的色度信号。 第二转换电路从低频带转换信号产生具有与从解调器获得的亮度信号相同的相位抖动分量的亮度信号的高频带分量。 来自解调器的亮度信号，亮度信号的高频分量和色度信号被混合以获得复合彩色视频信号。
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公开(公告)号：US4618014A
公开(公告)日：1986-10-21
申请号：US720317
申请日：1985-04-05
申请人： Masaaki Kobayashi
发明人： Masaaki Kobayashi
CPC分类号： G01G3/16
摘要： An apparatus for measuring a weight including a tuning fork vibrator to produce an oscillation signal having a frequency determined in accordance with a weight applied to the vibrator, a circuit for detecting an abnormal increase in an amplitude of the oscillation signal due to disturbing vibration to produce an abnormal signal, a frequency counter for counting the number of waves of the oscillation signal except for a period during which the abnormal signal is generated and a data processor for resetting the frequency counter each time the frequency counter has counted waves of the oscillation signal for a predetermined period and calculating a measured weight from a count value of the frequency counter.
摘要翻译： 一种用于测量包括音叉振动器的重量的装置，以产生具有根据施加到振动器的重量确定的频率的振荡信号，用于检测由于干扰振动引起的振荡信号振幅的异常增加的电路，以产生 异常信号，用于计数异常信号产生期间以外的振荡信号的波数的频率计数器，以及每当频率计数器对振荡信号计数波形时复位频率计数器的数据处理器， 预定时间段，并根据频率计数器的计数值计算测量的权重。
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49.发明授权
公开(公告)号：US4489352A
公开(公告)日：1984-12-18
申请号：US367976
申请日：1982-04-13
CPC分类号： G11B27/005 , G11B5/592
摘要： A video signal recording/reproducing apparatus includes a first set of rotary heads mounted on a rotary disk and a second set of rotary heads mounted on head actuators which are also mounted on the rotary disk. The apparatus has two reproduction modes. A magnetic tape in the first reproduction mode is driven at a speed equal to the speed used in a recording mode. The magnetic tape in the second reproduction mode is driven at a speed which is different from the speed used in the recording mode. The apparatus has a negative feedback loop which detects the reproduced signal level of the second set of rotary heads and drives the head actuators in order to increase the reproduced signal level of the second set of rotary heads. In the first reproduction mode, the negative feedback loop is intermittently closed. At the period of time when the negative feedback loop is open, the negative feedback loop holds the value of its output signal to that of the last time period when the negative feedback loop was closed, and, in addition, the head actuator is not driven when the feedback loop is open. At a transitional period when the apparatus switches from the first reproduction mode to the second reproduction mode, a holding signal from the negative feedback loop is supplied to the head actuator.
摘要翻译： 视频信号记录/再现装置包括安装在旋转盘上的第一组旋转磁头和安装在头部致动器上的第二组旋转磁头，磁头驱动器也安装在转盘上。 该装置具有两种再现模式。 以与记录模式下使用的速度相等的速度驱动第一再现模式中的磁带。 以与记录模式下使用的速度不同的速度驱动第二再现模式中的磁带。 该装置具有负反馈回路，其检测第二组旋转磁头的重放信号电平并驱动磁头致动器，以增加第二组旋转磁头的重放信号电平。 在第一再现模式中，负反馈回路间歇地闭合。 在负反馈回路打开的时间段，负反馈回路将其输出信号的值保持为负反馈回路闭合的最后一个时间段的值，此外，头驱动器不被驱动 当反馈回路打开时。 在设备从第一再现模式切换到第二再现模式的过渡期间，来自负反馈回路的保持信号被提供给磁头致动器。
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公开(公告)号：US4394701A
公开(公告)日：1983-07-19
申请号：US208476
申请日：1980-11-19
申请人： Kouichi Igata , Masaaki Kobayashi
发明人： Kouichi Igata , Masaaki Kobayashi
CPC分类号： G11B33/10
摘要： A recording time mode detector for automatically detecting the recording time mode of reproducing video tape. This detector is constructed of a counter which counts the number of rotations of the capstan which drives the reproducing video tape and is reset by a reproduced control signal. The recording time mode is detected by the count stored in the counter.
摘要翻译： 一种记录时间模式检测器，用于自动检测再现磁带的记录时间模式。 该检测器由计数器，该计数器对驱动再现录像带的绞盘的转数进行计数，并由再生的控制信号复位。 通过存储在计数器中的计数来检测记录时间模式。
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