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1. 发明授权

US4963992A Apparatus for recording/reproducing digital video signals in both a standard mode and a long playing mode 失效
标题翻译：用于在标准模式和长播放模式下记录/再现数字视频信号的装置
公开(公告)号：US4963992A
公开(公告)日：1990-10-16
申请号：US301462
申请日：1989-01-26
申请人： Nobukazu Doi , Yoshizumi Eto , Morishi Izumita , Seiichi Mita , Kazuyuki Takeshita
发明人： Nobukazu Doi , Yoshizumi Eto , Morishi Izumita , Seiichi Mita , Kazuyuki Takeshita
IPC分类号： H04N5/92 , G11B20/18 , H04N5/926 , H04N9/797
CPC分类号： H04N9/797 , H04N5/926
摘要： An apparatus for recording an reproducing a digital video signal is disclosed which includes n sampling circuits each for performing a sub-Nyquist sampling operation for the digital video signal in such a manner that the amount of data is reduced to one-n-th of an original amount (where n is a positive integer) and a pixel sampled by the sub-Nyquist sampling operation is not sampled by the remaining sampling circuits, recording/reproducing means for recording and reproducing information at all or part of pixels which are sampled by the n sampling circuits and a device for reconstructing the digital video signal from reproduced information at pixels with the aid of a synthesizing technique or interpolation technique.
摘要翻译：公开了一种用于记录再现数字视频信号的装置，其包括n个采样电路，每个采样电路用于对数字视频信号执行子奈奎斯特采样操作，使得数据量减少到数字视频信号的1 / 原始量（其中n是正整数）和通过亚奈奎斯特采样操作采样的像素不被剩余的采样电路采样，用于在全部或部分像素记录和再现信息的记录/再现装置 n个采样电路和用于通过合成技术或插值技术在像素处从再现信息重构数字视频信号的装置。

2. 发明授权

US5047852A Adaptive transform encoder for digital image signal in recording/reproducing apparatus 失效
标题翻译：用于记录/再现装置中的数字图像信号的自适应变换编码器
公开(公告)号：US5047852A
公开(公告)日：1991-09-10
申请号：US375727
申请日：1989-07-05
申请人： Hiroyuki Hanyu , Nobukazu Doi , Seiichi Mita , Morishi Izumita , Yoshizumi Eto
发明人： Hiroyuki Hanyu , Nobukazu Doi , Seiichi Mita , Morishi Izumita , Yoshizumi Eto
IPC分类号： G06T9/00 , H03M7/30 , H03M7/38 , H04N1/41 , H04N5/926 , H04N19/00 , H04N19/115 , H04N19/126 , H04N19/134 , H04N19/136 , H04N19/14 , H04N19/176 , H04N19/186 , H04N19/189 , H04N19/196 , H04N19/46 , H04N19/59 , H04N19/60 , H04N19/625 , H04N19/70 , H04N19/85
CPC分类号： H04N5/9264 , H04N19/115 , H04N19/124 , H04N19/14 , H04N19/149 , H04N19/154 , H04N19/176 , H04N19/18 , H04N19/184 , H04N19/60 , H04N19/13 , H04N19/146 , H04N19/91
摘要： An adaptive transform encoder can keep a recording rate of a digital signal at a constant level. It comprises a unit for orthogonal-transforming one block of digital input signal, a unit for calculating an activity index of the orthogonal-transformed block, a unit for comparing the activity index of the block with a predetermined reference, a unit for classifying the block to a standard bit class having a predetermined number of bits when the activity index of the block is equal to the reference, classifying the block to a low bit class having a smaller number of bits than the predetermined number of bits of the standard bit class when the activity index of the block is smaller than the reference, and classifying the block to a high bit class having a larger number of bits than the predetermined number of bits of the standard bit class when the activity index is larger than the reference, a quantization unit for quantizing the input signal of the block with the number of bits designated by the bit class, a unit for selecting the block of the low bit class from the quantized blocks, an allocation unit for adding to the selected block of the low bit class the data having more bits than the number of bits of the standard bit class of the block of the quantized high bit class, and an encoder unit for encoding the quantized block signal.
摘要翻译：自适应变换编码器可以将数字信号的记录速率保持在恒定水平。它包括用于正交变换一个数字输入信号块的单元，用于计算正交变换块的活动索引的单元，用于将块的活动性指数与预定参考进行比较的单元，用于对块进行分类的单元当块的活动索引等于参考时，将具有预定比特数的标准比特类分类为具有比标准比特类的预定比特数少的比特数比特的低比特级，该块的活动指数小于参考值，并且当活动指数大于参考值时，将块分类为具有比标准比特类的预定比特数大的比特数的比特数较大的高比特级，量化用于通过由位类别指定的比特数量量化块的输入信号的单元，用于从量化块中选择低比特等级的块的单元分配单元，用于向所选择的低位类别的块添加比量化高位类别的块的标准位类别的位数多的位的数据，以及用于对量化块信号进行编码的编码器单元。

3. 发明授权

US4983965A Demodulation apparatus 失效
标题翻译：解调装置
公开(公告)号：US4983965A
公开(公告)日：1991-01-08
申请号：US444845
申请日：1989-12-04
申请人： Nobukazu Doi , Morishi Izumita , Seiichi Mita , Yoshizumi Eto
发明人： Nobukazu Doi , Morishi Izumita , Seiichi Mita , Yoshizumi Eto
IPC分类号： G11B20/14 , H03M5/14
CPC分类号： H03M5/14
摘要： An original digital signal is converted into either a Miller-squared code signal or a Miller code signal, and undergoes serial-to-parallel conversion to produce n-phase signals (where n is desired to be a positive even number). N-phase virtual demodulated signals are simultaneously generated at clock timing having a period equivalent to 1/n times the period of the transmission clock. Out of the n-phase virtual demodulated signals, n/2 phases are selected to undergo parallel-to-serial conversion, the original digital signal being thus obtained.
摘要翻译：原始数字信号被转换成米勒平方码信号或米勒码信号，并进行串并转换以产生n相信号（其中n希望为正偶数）。在具有相当于传输时钟的周期的1 / n倍的周期的时钟定时处同时产生N相虚拟解调信号。在n相虚拟解调信号中，选择n / 2相进行并行到串行转换，从而获得原始数字信号。

4. 发明授权

US4653052A Method for decoding double-encoding codes and apparatus using the same 失效
标题翻译：用于对双重编码码进行解码的方法及使用其的装置
公开(公告)号：US4653052A
公开(公告)日：1987-03-24
申请号：US750513
申请日：1985-07-01
申请人： Nobukazu Doi , Morishi Izumita , Seiichi Mita , Yoshizumi Eto , Morito Rokuda
发明人： Nobukazu Doi , Morishi Izumita , Seiichi Mita , Yoshizumi Eto , Morito Rokuda
IPC分类号： G06F11/10 , H03M13/27 , H03M13/29
CPC分类号： H03M13/29
摘要： The present invention relates to a method and an apparatus for decoding double-encoding codes in which the information to be decoded comprises a first data and a second data. The operation for decoding double-encoding codes is achieved through two stages. A decoder of the first stage checks the first data, and when an error is found in the first data, all symbols of the first data are assumed to be wrong. The first-stage decoder then adds an erasure flag to all symbols to generate erasure symbols. As a result, these erasure symbols include the symbols which are actually erroneous and those which are correct. A decoder of the second stage is used to perform an error correction on the second data. For this purpose, the second-stage decoder detects the number of erasure symbols which are contained in the second data and which are actually erroneous. If the number of actually erroneous symbols does not exceed the maximum number of correctable symbols which can be corrected by the decoder of the second stage, the error correction is effected; otherwise, the decoder detects an error without conducting the error correction.
摘要翻译：本发明涉及一种用于解码双重编码码的方法和装置，其中待解码的信息包括第一数据和第二数据。双编码解码操作通过两个阶段实现。第一级的解码器检查第一数据，并且当在第一数据中发现错误时，假定第一数据的所有符号是错误的。然后，第一级解码器将擦除标志添加到所有符号以产生擦除符号。结果，这些擦除符号包括实际上是错误的符号和正确的符号。第二级的解码器用于对第二数据执行纠错。为此，第二级解码器检测包含在第二数据中并且实际上是错误的擦除符号的数量。如果实际错误符号的数量不超过可由第二级的解码器校正的可校正符号的最大数目，则进行纠错; 否则，解码器在不进行纠错的情况下检测到错误。

5. 发明授权

US4970707A Optical tape apparatus with a tracking control mechanism and/or a focusing control mechanism 失效
标题翻译：具有跟踪控制机构和/或聚焦控制机构的光带装置
公开(公告)号：US4970707A
公开(公告)日：1990-11-13
申请号：US239389
申请日：1988-09-01
申请人： Fumio Hara , Yoshito Tsunoda , Shigeru Nakamura , Yoshizumi Eto , Seiichi Mita , Morishi Izumita , Hiroyuki Tsuchinaga , Masuo Kasai
发明人： Fumio Hara , Yoshito Tsunoda , Shigeru Nakamura , Yoshizumi Eto , Seiichi Mita , Morishi Izumita , Hiroyuki Tsuchinaga , Masuo Kasai
IPC分类号： G11B7/003 , G11B7/09
CPC分类号： G11B7/09 , G11B7/0031 , G11B7/0925
摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.
摘要翻译：具有改进的聚焦和跟踪控制的光带装置。光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。光学系统包括用于将光束聚焦到胶带上的聚光透镜。通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。读头读取定时标记，光头读取跟踪信号。定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。

6. 发明授权

US4628297A Code modulation system 失效
标题翻译：码调制系统
公开(公告)号：US4628297A
公开(公告)日：1986-12-09
申请号：US696477
申请日：1985-01-30
申请人： Seiichi Mita , Morishi Izumita , Masuo Umemoto , Yoshizumi Eto , Morito Rokuda , Hidehiro Kanada
发明人： Seiichi Mita , Morishi Izumita , Masuo Umemoto , Yoshizumi Eto , Morito Rokuda , Hidehiro Kanada
IPC分类号： H04L25/49 , G11B20/14 , H04N5/91 , H04N5/92 , H03K13/24 , G11B5/09
CPC分类号： G11B20/1426
摘要： In the code modulation system for converting input data levels into an output signal in the form of code words by providing M input levels among N input levels assigned to input data with stairlike code weights on the basis of the input levels, (N-M) input levels which are the difference between said N input levels and said M input levels are respectively disposed near transition points where said stairlike code weight is changed, and the code weights are provided with hysteresis in the ascent process and the descent process of the input data level.
摘要翻译：在用于将输入数据电平转换为码字形式的输出信号的码调制系统中，通过在分配给输入数据的N个输入电平之间提供基于输入电平的阶梯式码权重的M个输入电平，（NM）输入电平所述N个输入电平和所述M个输入电平之间的差别分别设置在所述阶梯式码权重改变的过渡点附近，并且在上升处理中的代码权重和输入数据电平的下降处理被赋予滞后。

7. 发明授权

US4827489A Decoding device for digital signals 失效
标题翻译：数字信号解码装置
公开(公告)号：US4827489A
公开(公告)日：1989-05-02
申请号：US44489
申请日：1987-05-01
申请人： Nobukazu Doi , Hideki Imai , Morishi Izumita , Seiichi Mita , Akira Saito , Hiroto Yamauchi , Mamoru Kaneko , Tetsuya Amano
发明人： Nobukazu Doi , Hideki Imai , Morishi Izumita , Seiichi Mita , Akira Saito , Hiroto Yamauchi , Mamoru Kaneko , Tetsuya Amano
IPC分类号： H03M13/00 , G11B20/18 , H03M13/45 , H04L1/00 , H04L25/04 , H04L27/06
CPC分类号： H04L1/00 , H03M13/45
摘要： A device for decoding coded digital signals for every symbol consisting of a plurality of binary signals comprises first circuit for generating a first reliability for every binary signal; hard decided from the received or reproduced signal, in the symbol and second circuit for generating a second reliability for every symbol consisting of n binary signals on the basis of the first reliability, whereby decoding processing e.g. soft decision decoding is effected for every signal, depending on the second reliability.
摘要翻译：用于对由多个二进制信号组成的每个符号对编码数字信号进行解码的装置包括用于为每个二进制信号产生第一可靠性的第一电路; 在符号和第二电路中根据所接收的或再现的信号硬判决，用于基于第一可靠性为由n个二进制信号组成的每个符号产生第二可靠性，从而解码处理例如。根据第二可靠性，对每个信号进行软判决解码。

8. 发明授权

US4868853A Demodulation circuit for digital modulated signal 失效
标题翻译：数字调制信号解调电路
公开(公告)号：US4868853A
公开(公告)日：1989-09-19
申请号：US181528
申请日：1988-04-14
申请人： Morishi Izumita , Seiichi Mita , Nobukazu Doi , Masuo Umemoto , Hiroto Yamauchi , Shigeaki Fujino , Nobuo Murata
发明人： Morishi Izumita , Seiichi Mita , Nobukazu Doi , Masuo Umemoto , Hiroto Yamauchi , Shigeaki Fujino , Nobuo Murata
IPC分类号： H03M5/14
CPC分类号： H03M5/14 , H03M5/145
摘要： A demodulation circuit for demodulating a modulated digital including a unit for detecting a specific pattern contained in a series of data before modulation, a unit for judging the phase relation between the specific pattern and a clock pulse used for demodulation, a unit for performing a counting operation on the basis of the result of said judgment, and a unit for controlling the phase of said clock pulse for demodulation on the basis of the count.
摘要翻译：一种用于解调调制数字的解调电路，包括用于检测包含在调制之前的一系列数据中的特定模式的单元，用于判断特定模式与用于解调的时钟脉冲之间的相位关系的单元，用于执行计数的单元基于所述判断结果的操作，以及用于基于计数控制用于解调的所述时钟脉冲的相位的单元。

9. 发明授权

US4733313A Digital recording and playback system for X-ray video signals 失效
标题翻译：用于X射线视频信号的数字录放系统
公开(公告)号：US4733313A
公开(公告)日：1988-03-22
申请号：US854512
申请日：1986-04-22
申请人： Morishi Izumita , Seiichi Mita , Nobukazu Doi , Shusaku Nagahara , Shigeyuki Ikeda
发明人： Morishi Izumita , Seiichi Mita , Nobukazu Doi , Shusaku Nagahara , Shigeyuki Ikeda
IPC分类号： H04N19/00 , H04N1/21 , H04N1/41 , H04N5/32 , H04N5/78 , A61B6/02
CPC分类号： H04N5/32 , H04N1/2175
摘要： In medical image treating systems, especially when an X-ray image intensifier and TV camera are used, video signals composed of available video signals containing specified image information and unavailable video signals containing no such image information are output from the TV camera. Only the digital video signals of the converted digital video signals corresponding to the available video signals are treated and the digital video signals after treatment are recorded and reproduced with a recording device.
摘要翻译：在医疗图像处理系统中，特别是使用X射线图像增强器和TV摄像机时，从TV摄像机输出包含指定图像信息的可用视频信号和不包含该图像信息的不可用视频信号的视频信号。仅处理与可用视频信号相对应的经转换的数字视频信号的数字视频信号，并且用记录装置记录和再现处理后的数字视频信号。

10. 发明授权

US5151924A Automatic equalization method and apparatus 失效
标题翻译：自动均衡方法及装置
公开(公告)号：US5151924A
公开(公告)日：1992-09-29
申请号：US454406
申请日：1989-12-21
申请人： Seiichi Mita , Morishi Izumita , Hiroshi Ide , Nobukazu Doi , Yoshinori Okada , Yasuo Inagaki
发明人： Seiichi Mita , Morishi Izumita , Hiroshi Ide , Nobukazu Doi , Yoshinori Okada , Yasuo Inagaki
IPC分类号： G11B5/09 , G11B20/10 , H03H15/00 , H04B3/06 , H04L25/03 , H04N5/926 , H04N5/93
CPC分类号： H04L25/03038 , G11B20/10009 , H04N5/926 , H04N5/93
摘要： An automatic equalization apparatus useful for supplying an output signal of a transversal filter simultaneously to two juxtaposed comparators, one of the two comparators performing signal identification, the other of the two comparators detecting an equalization error with the reference level changed, and extracting data from resultant two kinds of data trains by taking at least (N-1)/2+1 bits as the unit, N being the number of taps of the transversal filter, performing correlation computation, and setting tap coefficients of the transversal filter on the basis of the resultant accumulated value.
摘要翻译：一种自动均衡装置，用于同时向两个并置的比较器提供横向滤波器的输出信号，两个比较器之一执行信号识别，两个比较器中的另一个比较器检测参考电平改变的均衡误差，并从结果中提取数据通过以至少（N-1）/ 2 + 1位为单位，N为横向滤波器的抽头数，执行相关计算，以及基于横向滤波器的抽头系数设置两种数据串产生累计值。

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