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公开(公告)号：US5602816A
公开(公告)日：1997-02-11
申请号：US517584
申请日：1995-08-22
申请人： Nobutaka Amada , Toshifumi Takeuchi , Takao Arai
发明人： Nobutaka Amada , Toshifumi Takeuchi , Takao Arai
CPC分类号： G11B20/10046 , G11B20/10009 , G11B20/10527 , G11B20/1426 , G11B7/005
摘要： An object of the present invention is to increase the recording density of digital information signal in a recording medium without changing parameters of the recording medium and a RLL code. To accomplish the object, the present invention has a frequency response of the equalizer set so that an overall transmission frequency characteristic H(f) of the RLL coder, the recording medium, and the equalizer to an impulse becomes the one given by an equation below ##EQU1## where Fm denotes a cut-off frequency of the recording medium.
摘要翻译： 本发明的目的是提高记录介质中的数字信息信号的记录密度，而不改变记录介质的参数和RLL代码。 为了实现该目的，本发明具有均衡器组的频率响应，使得RLL编码器，记录介质和与脉冲的均衡器的总体传输频率特性H（f）成为由下面的等式给出的
其中Fm表示记录介质的截止频率。 -
公开(公告)号：US5343455A
公开(公告)日：1994-08-30
申请号：US677767
申请日：1991-03-29
申请人： Toshifumi Takeuchi , Takao Arai , Yutaka Nagai , Izumi Kimura
发明人： Toshifumi Takeuchi , Takao Arai , Yutaka Nagai , Izumi Kimura
IPC分类号： G11B7/0045 , G11B20/10 , G11B20/18 , G11B27/034 , G11B27/30 , G11B7/00
CPC分类号： G11B7/0045 , G11B20/10527 , G11B20/1809 , G11B27/034 , G11B27/3063 , G11B2020/10592 , G11B2220/218 , G11B2220/2545
摘要： A digital signal recording method and apparatus for recording first digital data and second digital data on a writable disc without an interleave discrepancy therebetween. The first digital data is previously recorded and the second digital data is at least one of overlapped and joined with the first digital data on a writable disc so that no interleave discrepancy occurs.
摘要翻译： 一种数字信号记录方法和装置，用于在可写盘上记录第一数字数据和第二数字数据，而不会在其间存在交错差异。 先前记录第一数字数据，并且第二数字数据与可写盘上的第一数字数据重叠和连接中的至少一个，使得不发生交错差异。
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公开(公告)号：US4961204A
公开(公告)日：1990-10-02
申请号：US353709
申请日：1989-05-18
CPC分类号： H04N5/928 , G11B20/1809
摘要： A PCM signal processing apparatus for recording or reproducing a PCM signal. The PCM signal reproducing apparatus of the invention is constituted by: a data addition circuit for receiving a first signal composed of n bits per word (n being an integer) and a second signal composed of n' bits per word (n' being an integer) as mode inputs different from each other, and for adding fixed data of (n-n') bits to every word of the second signal to thereby generate a third signal; a first switch device for receiving the first and third signals and for selectively outputting one of the first and third signals; a symbol generation circuit for converting every word of the output of the first switch device into symbol data of m.times.l bits (n>l); a signal processing circuit for performing at least interleave processing, error correction code generating processing, and addition of a synchronizing signal, on the output of the symbol generation circuit, to thereby generate a first data frame; a data deletion circuit for deleting the fixed data from the first data frame of the signal processing circuit to thereby generate a second data frame; and a second switch devices for receiving the first data frame from the signal processing circuit and the second data frame from the data deletion circuit.
摘要翻译： 一种用于记录或再现PCM信号的PCM信号处理装置。 本发明的PCM信号再现装置由以下部分构成：数据加法电路，用于接收由每个字n位（n为整数）组成的第一信号和由每个字n位（n'为整数）组成的第二信号 ）作为彼此不同的模式输入，并且用于将（n-n'）位的固定数据添加到第二信号的每个字，从而生成第三信号; 第一开关装置，用于接收第一和第三信号并选择性地输出第一和第三信号之一; 符号产生电路，用于将第一开关装置的输出的每个字转换成m×1位（n> 1）的符号数据; 信号处理电路，用于在符号生成电路的输出上执行至少交织处理，纠错码生成处理以及同步信号的相加，从而生成第一数据帧; 数据删除电路，用于从信号处理电路的第一数据帧中删除固定数据，从而生成第二数据帧; 以及用于从信号处理电路接收第一数据帧的第二开关装置和来自数据删除电路的第二数据帧。
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公开(公告)号：US4934003A
公开(公告)日：1990-06-19
申请号：US304776
申请日：1989-01-31
申请人： Kiyoshi Hayakawa , Takao Arai , Osamu Tanaka , Hiroshi Iijima , Hiroki Suzuki , Fumiyuki Matsuno , Kenji Misugi
发明人： Kiyoshi Hayakawa , Takao Arai , Osamu Tanaka , Hiroshi Iijima , Hiroki Suzuki , Fumiyuki Matsuno , Kenji Misugi
IPC分类号： A61G7/10
CPC分类号： A61G7/1017 , A61G7/1038 , A61G7/1046 , A61G7/1059 , A61G7/1086 , A61G7/1096 , A61G7/1076 , Y10S297/10 , Y10S414/134
摘要： A disabled transferring device comprises a stationary base and a rotary base coupled with the stationary base for forming a base assembly. An actuation lever assembly which has an actuation lever having a pivot point in the vicinity of one end and an actuation point at the other end, is pivotally supported on the rotary base of the base assembly. A pivotal support shaft is secured onto the level in the vicinity of the pivot point in such an arrangement that the securing point of the pivotal support shaft is oriented at the pivot point or between the one end and the pivot point with a first distance to the pivot point of the lever. The first distance is much shorted than a second distance between the pivot point and the actuation point. A saddle to mount thereon the disabled is mounted on the top end of the support shaft. The support shaft is pivotable between a tilted position with the saddle for placing the saddle on the chest or brest of the disabled and the vertical position at which the angular displacement of the shaft and saddle is caused to the angular position where the chair, bed, vehicular seat or so forth to transfer the disabled is oriented.
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85.发明授权Rotary head type magnetic recording and reproducing apparatus and method of producing tracking control signals therefor 失效旋转磁头型磁记录和再现装置及其跟踪控制信号的产生方法
公开(公告)号：US4843493A
公开(公告)日：1989-06-27
申请号：US838958
申请日：1986-03-12
申请人： Takashi Furuhata , Yasufumi Yumde , Fujio Okamura , Takaharu Noguchi , Toshifumi Shibuya , Katsuo Mohri , Takao Arai , Toshimichi Terada
发明人： Takashi Furuhata , Yasufumi Yumde , Fujio Okamura , Takaharu Noguchi , Toshifumi Shibuya , Katsuo Mohri , Takao Arai , Toshimichi Terada
IPC分类号： G11B15/467 , G11B15/473
CPC分类号： G11B15/4672 , G11B15/4678 , G11B15/4738
摘要： A method of producing a tracking control signal in a rotary head type magnetic recording and reproducing apparatus and a rotary head type magnetic recording and reproducing apparatus capable of a proper tracking by the use of the tracking control signal. First and second tracking signals are recorded on local portions of each odd-numbered track and the first tracking signal and a third tracking signal are recorded on local portions of each even-numbered track in such a manner that the second tracking signals on two odd-numbered track adjacent to any one even-numbered track are not overlapped with each other and the third tracking signals on two even-numbered tracks adjacent to any one odd-numbered track are not overlapped with each other when viewed in a direction perpendicular to the longitudinal direction of the tracks; upon scanning of a track crosstalk signals are detected from two adjacent track simultaneously with reproduction of the first and second or third tracking signals; and the detected crosstalk signals are compared by the use of timing of the reproduction of the first tracking signal for each track thereby producing a tracking control signal. The second tracking signal may have a frequency equal to that of the third tracking frequency.
摘要翻译： 一种在旋转磁头式磁记录和再现装置中产生跟踪控制信号的方法以及能够通过使用跟踪控制信号进行适当跟踪的旋转磁头型磁记录和再现装置。 第一跟踪信号和第二跟踪信号被记录在每个奇数号的轨道的本地部分上，并且第一跟踪信号和第三跟踪信号被记录在每个偶数轨迹的本地部分上， 与任何一个偶数编号的轨道相邻的编号轨道彼此不重叠，并且在与任何一个奇数编号的轨道相邻的两个偶数轨道上的第三跟踪信号在垂直于纵向的方向上观察时不彼此重叠 轨道方向; 在轨道的扫描时，与第一和第二或第三跟踪信号的再现同时从两个相邻轨道检测串扰信号; 并且通过使用每个轨道的第一跟踪信号的再现的定时来比较检测到的串扰信号，从而产生跟踪控制信号。 第二跟踪信号可以具有等于第三跟踪频率的频率。
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公开(公告)号：US4580255A
公开(公告)日：1986-04-01
申请号：US499245
申请日：1983-05-31
申请人： Shigeki Inoue , Takao Arai , Yukio Fukui , Takashi Takeuchi , Harushige Nakagaki , Masafumi Nakamura , Tatsuo Baba
发明人： Shigeki Inoue , Takao Arai , Yukio Fukui , Takashi Takeuchi , Harushige Nakagaki , Masafumi Nakamura , Tatsuo Baba
CPC分类号： G11B21/106 , G11B19/04 , G11B20/10 , G11B7/0941 , G11B7/0945 , G11B7/0948
摘要： A servo circuit for a signal reproducing apparatus for reproducing signals from a record medium such as a disc utilizing an optical pickup, wherein a variable gain amplifier is arranged in a servo loop between a pickup and an actuator so that the pickup is caused to track a signal track in accordance with a servo error signal produced by the variable gain amplifier. A playback condition of a disc is discriminated by detecting the number of errors in a signal reproduced from a recorded signal on the disc by the pickup, and a gain of the variable gain amplifier is controlled by the discrimination output so that the variation of the servo error signal caused by a difference in reflectance between individual discs is eliminated and a loop gain appropriate to an individual disc is automatically set.
摘要翻译： 一种用于信号再现装置的伺服电路，用于使用光学拾取器从诸如盘的记录介质再现信号，其中可变增益放大器布置在拾取器和致动器之间的伺服环路中，使得拾取器跟踪 根据由可变增益放大器产生的伺服误差信号的信号轨迹。 通过由拾取器检测从盘上的记录信号再现的信号中的错误数来识别盘的重放条件，并且通过鉴别输出来控制可变增益放大器的增益，使得伺服 消除由各个光盘之间的反射率差引起的误差信号，并且自动设置适合于单个光盘的环路增益。
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公开(公告)号：US4491880A
公开(公告)日：1985-01-01
申请号：US421401
申请日：1982-09-22
摘要： In a magnetic recording and reproducing apparatus of 2-head helical scan type, an overlapping portion is formed at one end of each video track on a magnetic tape, and a PCM audio signal is recorded on this overlapping portion. Video/audio selective switching circuits are disposed on the input or output side of video and audio recording amplifiers, and video/audio selective switching circuits and video/audio playback equalizer circuits are disposed on the output side of video and audio playback amplifiers. Each of the heads acts as both of a video head and an audio head.
摘要翻译： 在2磁头螺旋扫描型的磁记录和再现装置中，在磁带上的每个视频磁道的一端形成重叠部分，并且PCM音频信号被记录在该重叠部分上。 视频/音频选择开关电路设置在视频和音频记录放大器的输入或输出侧，并且视频/音频选择开关电路和视频/音频重放均衡器电路设置在视频和音频播放放大器的输出侧。 每个头都用作视频头和音频头。
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公开(公告)号：US4367499A
公开(公告)日：1983-01-04
申请号：US301133
申请日：1981-09-11
申请人： Takashi Hoshino , Takao Arai
发明人： Takashi Hoshino , Takao Arai
CPC分类号： G11B27/3018 , G11B15/005 , G11B15/026
摘要： An address on a magnetic tape to be searched and a current address of the magnetic tape which is read by playing back the tape are supplied to first arithmetic operation means to produce a signal indicative of the tape length to be fast moved and a signal indicative of the direction of the fast tape movement so that the tape is fast moved in the selected direction in response to the derived direction signal. Second arithmetic operation means watches address pitch signals produced during the fast tape movement and the tape length to be fast moved derived from the first arithmetic operation means, to release the fast tape movement when the predetermined length of tape has been fast moved.
摘要翻译： 要搜索的磁带上的地址和通过重放磁带读取的磁带的当前地址被提供给第一算术运算装置，以产生指示要快速移动的磁带长度的信号和指示 快速磁带移动的方向，使得磁带响应于导出的方向信号而沿所选择的方向快速移动。 第二算术运算装置是指在快速磁带移动期间产生的地址音调信号和从第一算术运算装置得到的要快速移动的磁带长度，以便在预定长度的磁带已快速移动时释放快速磁带移动。
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公开(公告)号：US4134078A
公开(公告)日：1979-01-09
申请号：US823198
申请日：1977-08-09
申请人： Takao Arai , Shigeru Okada , Kouichi Tomatsuri , Hiroshi Toeda
发明人： Takao Arai , Shigeru Okada , Kouichi Tomatsuri , Hiroshi Toeda
CPC分类号： H03G1/0052
摘要： A gain control circuit comprising a pair of transistors constituting a differential amplifier, and a pair of resistors each connected to the emitter of one of the transistors and having a sufficiently great resistance value compared with 1/gm of the transistor in the transistor operating range, the resistors being connected to a common regulated current supply to supply the halves of control current from the regulated current supply to the respective transistors, a pair of diodes are connected to the collectors of the respective transistors as a load, and a first variable resistor means is disposed in the current path traced from the diodes to the regulated current supply via the transistors and resistors for compensating fluctuation of the diffused resistance of the diodes. Further, a second variable resistor means is disposed in the base bias circuit for the transistors for compensating fluctuation of the base-emitter voltage of the transistors.
摘要翻译： 一种增益控制电路，包括构成差分放大器的一对晶体管和一对电阻器，每个电阻器连接到晶体管之一的发射极，并且与晶体管工作范围内的晶体管的1 / gm相比具有足够大的电阻值， 电阻器连接到公共调节电流源，以将控制电流的一半从调节电流源提供给相应的晶体管，一对二极管作为负载连接到相应晶体管的集电极，第一可变电阻器装置 被布置在从二极管经由晶体管和电阻器调节的电流源的电流路径中，以补偿二极管扩散电阻的波动。 此外，第二可变电阻器装置设置在用于晶体管的基极偏置电路中，用于补偿晶体管的基极 - 发射极电压的波动。
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公开(公告)号：US08074071B2
公开(公告)日：2011-12-06
申请号：US12840726
申请日：2010-07-21
IPC分类号： H04L9/16
CPC分类号： H04N21/4367 , G11B20/00086 , G11B20/00188 , G11B20/00195 , G11B20/0021 , G11B20/00224 , G11B20/00304 , G11B20/00449 , G11B20/00739 , G11B20/00753 , G11B20/00768 , G11B20/00884 , H04K1/00 , H04L9/32 , H04L2209/603 , H04N5/765 , H04N5/77 , H04N5/775 , H04N5/781 , H04N5/85 , H04N5/913 , H04N9/8042 , H04N21/4405 , H04N2005/91328 , H04N2005/91335 , H04N2005/91364
摘要： A system effecting a data reproducing method for a plurality of devices, for sending and receiving data by authenticating the plurality of devices with each other, said data reproducing method including: selecting, from a plurality of descrambling methods, a descrambling method corresponding to a type of said data, executing authentication by an authenticating method corresponding to the selected descrambling method, where the authenticating method is selected from a plurality of authenticating methods, and reproducing said data.
摘要翻译： 一种影响多个设备的数据再现方法的系统，用于通过彼此认证多个设备来发送和接收数据，所述数据再现方法包括：从多个解扰方法中选择对应于类型的解扰方法 的所述数据，通过与所选择的解扰方法相对应的认证方法执行认证，其中从多种认证方法中选择认证方法，并再现所述数据。
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