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1.发明授权
公开(公告)号：US4353130A
公开(公告)日：1982-10-05
申请号：US191725
申请日：1980-09-29
CPC分类号： H04L7/042 , H04J3/0605
摘要： A data stream is received from a medium. This stream consists of synchronization words and data words. The synchronization words are either identical or one the inverse of the other when they are correctly received. Between two synchronization words a fixed number of n data words is present. The information received is always consecutively stored in a buffer memory. The buffer memory has connected to it a detection device for generating an instantaneous synchronization signal by way of a majority decision on at least three correctly received synchronization words. Preferably, the buffer memory is a shift register comprising a data output which is situated approximately 1/2n data words +1/2 synchronization word beyond the center of the shift register when n has an even value.
摘要翻译： 从介质接收数据流。 该流由同步字和数据字组成。 当正确接收到同步字时，同步字是相同的，或者一个是相反的。 在两个同步字之间存在固定数量的n个数据字。 所接收的信息总是连续地存储在缓冲存储器中。 缓冲存储器已经连接到其上，用于通过至少三个正确接收的同步字的多数决定产生瞬时同步信号的检测装置。 优选地，缓冲存储器是包括数据输出的移位寄存器，当n具有偶数值时，数据输出位于移位寄存器的中心之外的大约1 / 2n数据字+1/2同步字。
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公开(公告)号：US4402014A
公开(公告)日：1983-08-30
申请号：US286232
申请日：1981-07-23
IPC分类号： H01L29/762 , H01L21/339 , H01L27/105 , H01L27/146 , H01L27/148 , H01L29/768 , H04N5/335 , H04N3/16 , H03K17/60 , H04N3/14
CPC分类号： H01L27/1055 , H01L27/14643 , H01L29/768
摘要： MOS switch is provided, in particular for a camera, with which within the line flyback time the whole optically generated signal can be transferred by periodically transferring back a fixed quantity of charge from the drain to the source.
摘要翻译： 提供MOS开关，特别是用于照相机，通过在线路回扫时间内，可以通过周期性地从排水口向源传送固定数量的电荷来传输整个光学生成的信号。
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公开(公告)号：US4292655A
公开(公告)日：1981-09-29
申请号：US88735
申请日：1979-10-26
CPC分类号： G06F11/187 , H04L7/0083 , H04L7/041
摘要： A system having a medium which presents signal sequences which at least partly consist of binary signal sequences and a device for generating a synchronization signal for synchronizing at least parts of said signal sequence (blocks, words). A binary signal sequence contains a synchronization pattern which consists of (2N+1) groups of codes of m+n bits. A number of (N+1) groups have a code content which exhibits a given, at least minimum Hamming distance with respect to the code (codes) of the other group (groups). The device includes a majority decision device which produces the synchronization signal by means of the n bit codes of said (2N+1) groups on the basis of a majority decision (N+1 out of 2N+1).
摘要翻译： 一种具有介质的系统，其提供至少部分由二进制信号序列组成的信号序列，以及用于产生用于使所述信号序列（块，字）的至少一部分同步的同步信号的装置。 二进制信号序列包含同步模式，其由m + n位的（2N + 1）码组组成。 多个（N + 1）组具有相对于其他组（组）的代码（代码）呈现给定的至少最小汉明距离的代码内容。 该装置包括多数决定装置，其基于多数决定（N + 1之外的2N + 1），通过所述（2N + 1）组的n位代码产生同步信号。
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4.发明授权Apparatus for writing digital information in a disc-shaped optically readable record carrier 失效用于将数字信息写入盘形光学可读记录载体的装置
公开(公告)号：US4366564A
公开(公告)日：1982-12-28
申请号：US127349
申请日：1980-03-05
IPC分类号： G11B7/00 , G11B7/0045 , G11B20/14 , H04N5/76
CPC分类号： G11B7/0045 , G11B20/1419 , G11B20/1423
摘要： An apparatus for recording optically detectable information in a record carrier provided with information areas arranged in accordance with a spiral or concentric track pattern, which areas alternate with synchronization areas each containing the address of the associated information area. Recording is effected with a first modulated laser beam, while a second beam is projected after the first beam for reading the recorded information. The track pattern has previously been provided with a periodic track modulation of a frequency at which the power spectrum of the information to be recorded has a substantially zero value. The apparatus comprises a first and a second filter for filtering a signal corresponding to the track modulation out of the signal derived by detecting the first or second laser beam reflected or transmitted by the record carrier. In series with the second filter there is included a delay network from which a synchronization signal is available. Furthermore, there is provided a phase comparator which, during reading of the synchronization areas, determines the phase difference between the signals obtained from the first and the second filter and which controls the delay network in such a way that the output signal of the delay network is in phase with the output signal of the first filter.
摘要翻译： 一种用于在记录载体中记录光学可检测信息的装置，其具有根据螺旋或同心轨道图案布置的信息区域，该区域与每个包含相关信息区域的地址的同步区域交替。 用第一调制激光束进行记录，而在第一光束之后投射第二光束以读取所记录的信息。 先前已经提供了轨迹图案，其中要记录的信息的功率谱具有基本为零的频率的周期轨道调制。 该装置包括第一滤波器和第二滤波器，用于通过检测由记录载体反射或发射的第一或第二激光束而导出的信号中对应于轨道调制的信号进行滤波。 与第二滤波器串联包括延迟网络，同步信号从该延迟网络可用。 此外，提供了一种相位比较器，其在同步区域的读取期间确定从第一和第二滤波器获得的信号之间的相位差，并且以这样的方式控制延迟网络，使得延迟网络的输出信号 与第一滤波器的输出信号同相。
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公开(公告)号：US4435687A
公开(公告)日：1984-03-06
申请号：US228527
申请日：1981-01-26
CPC分类号： H04L7/0066 , H04L7/027
摘要： An absolute differentiator receives a self-clocking digital input signal, and its output is applied to a series of delay elements. The outputs of the differentiator and the delay elements are coupled to an OR-gate. The output of the OR-gate is applied to a phase-locked loop to produce a recovered clock signal. The delay elements can be variable with a delay controlled by an output signal from the phase-locked loop, to thereby track a varying center frequency of the digital input signal.
摘要翻译： 一个绝对差分器接收一个自定时数字输入信号，其输出被应用于一系列延迟元件。 微分器和延迟元件的输出耦合到或门。 或门的输出被施加到锁相环以产生恢复的时钟信号。 延迟元件可以通过来自锁相环的输出信号控制的延迟而变化，从而跟踪数字输入信号的变化的中心频率。
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6.发明授权Method of coding data bits on a recording medium, arrangement for putting the method into effect and recording medium having an information structure 失效在记录介质上编码数据位的方法，用于使该方法生效的布置和具有信息结构的记录介质
公开(公告)号：US4410877A
公开(公告)日：1983-10-18
申请号：US179338
申请日：1980-08-18
CPC分类号： H04L25/4904 , G11B20/1423 , G11B20/1426
摘要： "Method of coding data bits on a recording medium, arrangement for putting the method into effect and recording medium having an information structure."The so-called Miller modulation has the disadvantage that a direct current is generated in the information channel. When this modulation method is used for magnetical or optical recording, the result is that the amplitude values and the zero crossings are deformed as these channels cannot transmit direct current.According to the invention, in order to obtain, a d.c. free modulation, the Miller modulation concept is modified such that sequences of data bits which, after coding, result in the introduction of a d.c. component are coded differently. It appears that, the frequency zero excepted, a good suppression of the response is obtained also in a fairly wide low-frequency portion of the spectrum.The invention further relates to an arrangement for putting the method into effect and to a recording medium, for example an optical disc, having an information structure which is coded by means of the d.c.-free coding.
摘要翻译： “在记录介质上编码数据位的方法，用于使该方法生效的布置和具有信息结构的记录介质”。 所谓的米勒调制的缺点是在信息通道中产生直流电流。 当这种调制方法用于磁记录或光学记录时，结果是由于这些通道不能传输直流电流，所以振幅值和过零点变形。 根据本发明，为了获得一个直流 自由调制，米勒调制概念被修改，使得在编码之后的数据比特序列导致引入直流。 组件的编码方式不同。 看来，频率零除外，在频谱的相当宽的低频部分也获得良好的响应抑制。 本发明还涉及一种用于将该方法投入使用的装置和具有通过无直流编码编码的信息结构的记录介质，例如光盘。
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7.发明授权
公开(公告)号：US4238843A
公开(公告)日：1980-12-09
申请号：US008221
申请日：1979-01-31
IPC分类号： G11B20/10 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B20/14 , G11B23/00 , G11B23/30 , G11B23/36 , G11C13/04
CPC分类号： G11B7/00745 , G11B20/1419 , G11B20/1423
摘要： A disc-shaped record carrier having an information track which is divided into a plurality of sectors per track circumference. Each sector is divided into a data section, in which the data can be recorded, and a synchronizing section. This synchronizing section consists of an optically detectable relief structure and comprises an indicator portion and an address portion. The address portion contains the information about the track number and the sector number. The indicator portion serves to define the beginning of the address portion unambiguously and for this purpose has such a relief structure that the indicator signal produced after cooperation with the radiation beam has a frequency which is clearly distinguishable from signal components resulting from the address portion.
摘要翻译： 一种盘形记录载体，其具有信息轨道，每个轨道圆周被划分成多个扇区。 每个扇区被划分成可记录数据的数据部分和同步部分。 该同步部分由光学可检测的浮雕结构组成，并包括指示器部分和地址部分。 地址部分包含关于轨道号和扇区号的信息。 指示器部分用于明确地定义地址部分的开始，并且为此目的具有这样的浮雕结构，即在与辐射束协作之后产生的指示符信号具有与由地址部分产生的信号分量明显区分的频率。
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8.发明授权Optically readable record carrier with track undulations for producing a synchronizing clock signal and apparatus for forming such track 失效具有轨道起伏的光学可读记录载体，用于产生同步时钟信号和用于形成这种轨道的装置
公开(公告)号：US4972401A
公开(公告)日：1990-11-20
申请号：US224085
申请日：1989-01-17
CPC分类号： G11B7/24082 , G11B20/1419 , G11B20/1423 , G11B7/004
摘要： An optically readable record carrier for storing digitally coded information having a power spectrum with a substantially zero level at a predetermined frequency. The information is recorded on and/or reproduced from substantially parallel elongated tracks on the record carrier which have a periodic undulation at the aforesaid predetermined frequency. Such undulation generates a clock signal for synchronizing the recording and/or reproduction of the digitally encoded information on the tracks, and does not interfere with the recording or reproduction of such information. Apparatus is disclosed for forming such tracks on the record carrier.
摘要翻译： 一种光学可读记录载体，用于以预定频率存储具有基本零电平的功率谱的数字编码信息。 信息被记录在记录载体上的基本上平行的细长轨道上和/或从上述预定频率具有周期性波动的再现。 这种波动产生用于使轨道上的数字编码信息的记录和/或再现同步的时钟信号，并且不干扰这种信息的记录或再现。 公开了用于在记录载体上形成这种轨道的装置。
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9.发明授权Method of recording information in a magneto-optical record carrier, apparatus for carrying out the method, and magneto-optical record carrier for use in an apparatus for carrying out the method 失效在磁光记录载体中记录信息的方法，用于执行该方法的装置和用于执行该方法的装置中使用的磁光记录载体
公开(公告)号：US4630249A
公开(公告)日：1986-12-16
申请号：US562342
申请日：1983-12-16
IPC分类号： G11B5/02 , G11B5/012 , G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10517 , G11B11/10595 , G11B5/012
摘要： The disclosed method for writing information in a magneto-optical record carrier employs two light beams each positioned on one of two tracks on the record carrier. In one track information is recorded by one light beam, while simultaneously the other track is erased by the other light beam. This enables real time information recording.
摘要翻译： 所公开的用于在磁光记录载体中写入信息的方法使用两个光束，每个光束位于记录载体上的两个轨道中的一个轨道上。 在一个轨道信息由一个光束记录，同时另一个轨道被另一个光束擦除。 这使得实时信息记录。
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10.发明授权Camera tube with mutually insulated, light absorbing particles on gun side of target 失效相机管相互隔绝，吸光粒子在目标枪的一侧
公开(公告)号：US4353005A
公开(公告)日：1982-10-05
申请号：US161546
申请日：1980-06-20
申请人： Hendricus F. J. J. van Tongeren , Paulus P. M. Schampers , Willem P. Weijland , Marino G. Carasso
发明人： Hendricus F. J. J. van Tongeren , Paulus P. M. Schampers , Willem P. Weijland , Marino G. Carasso
CPC分类号： H01J29/89 , H01J29/39 , H01J2229/8922
摘要： The optical cross talk in a camera tube is reduced by the provision of a filter element which overlaps the entire target. The filter may is be arranged behind the target and is constructed so that it has low reflectance for incoming light. In order to prevent excessive transverse conduction, such a filter has a mosaic structure consisting of mutually insulated areas.
摘要翻译： 通过提供与整个目标物重叠的过滤元件来减少相机管中的光学串扰。 过滤器可以布置在目标后面，并且被构造成使得其对于入射光具有低反射率。 为了防止过度的横向导电，这种过滤器具有由相互绝缘的区域组成的马赛克结构。
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