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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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2.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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3.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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4.发明授权System for transmitting digital information, coding arrangement for use in that system, decoding arrangement for use in that system and record carrier for use in that system 失效用于发送数字信息的系统，在该系统中使用的编码装置，用于该系统的解码装置和用于该系统的记录载体
公开(公告)号：US4464714A
公开(公告)日：1984-08-07
申请号：US315793
申请日：1981-10-28
IPC分类号： G11B7/00 , G11B7/004 , G11B20/12 , G11B20/14 , H03M5/02 , H03M7/20 , H03M7/22 , H04L25/49 , G06F3/06 , G11B5/09 , H03K13/24
CPC分类号： G11B20/1426 , H04L25/49
摘要： A system for transmitting digital information including a coding arrangement, a transfer medium, for example a record carrier, and a decoding arrangement.In the coding arrangement the digital information is received as groups of input words which are encoded to form code words, each code word corresponding to an input word. Each code word has a time duration equal to s.tau..sub.O and each is assembled from M subgroups G.sub.m of I signal positions t.sub.mi spaced by equal time intervals .tau., where m is a number from 1 to M, inclusive, corresponding to a subgroup G.sub.m and i is a number within each subgroup G.sub.m from 1 to I inclusive. In each subgroup G.sub.m, k of these signal positions t.sub.mi are always occupied by a signal which is distinguishable from the signal in unoccupied positions, where k is an integer smaller than I (1.ltoreq.k.ltoreq.I-1). The first positions of the subgroups G.sub.m are located at mutually different time intervals .epsilon..sub.m from the beginning of the code word, where O.ltoreq..epsilon..sub.m .ltoreq..tau. with the restrictions M.gtoreq.2 and ##EQU1## and the group of code words for which it holds that M=2, I=s=2, k=1,.tau.=.tau..sub.O and .epsilon..sub.2 =.epsilon..sub.1 +1/2.tau. being excepted.
摘要翻译： 一种用于发送包括编码装置，传送介质，例如记录载体和解码装置的数字信息的系统。 在编码装置中，数字信息被接收为被编码以形成代码字的输入字组，每个代码字对应于输入字。 每个码字具有等于sτO的时间长度，并且每个由M个子信元位置t m组合，其中M个子组Gm以相等的时间间隔τ间隔，其中m是从1到M的数字，包括对应于子组Gm和 我是每个子组中的数字，从1到I包括Gm。 在每个子组Gm中，这些信号位置tmi的k总是被与空闲位置的信号区分开的信号占据，其中k是小于I（1≤k≤I-1）的整数。 子组Gm的第一位置位于与代码字开头相邻的不同的时间间隔εm处，其中O =ε/τ与限制M> / = 2和
和组 其中M = 2，I = s = 2，k = 1，tau = tau O和ε2 =ε1 + 1/2 tau的代码字被除外。 -
5.发明授权Apparatus for reproducing digitally coded information recorded on an optically readable disc-shaped record carrier 失效用于再现记录在光学可读的盘形记录载体上的数字编码信息的装置
公开(公告)号：US4326282A
公开(公告)日：1982-04-20
申请号：US132743
申请日：1980-03-24
CPC分类号： G11B20/1423 , G11B20/1419 , G11B7/005
摘要： Disclosed is an apparatus for reproducing digitally coded information recorded on a disc-shaped record carrier in the form of optically detectable, unit information areas arranged in accordance with a concentric or spiral track pattern. The apparatus comprises a filter which is tuned to a frequency f=V/L, V being the nominal tangential speed of the record carrier and L the nominal center-to-center distance of said unit areas. This frequency component has a frequency equal to twice the bit frequency of the coded information and is situated at a zero point of the power spectrum of said information, so that the extracted signal may be employed for the generation of a clock signal.
摘要翻译： 公开了一种用于以光学可检测的单元信息区域的形式再现记录在盘形记录载体上的数字编码信息的设备，该单元信息区域根据同心或螺旋轨迹图案排列。 该装置包括被调谐到频率f = V / L的滤波器，V是记录载体的标称切向速度，L是所述单位区域的标称中心到中心距离。 该频率分量具有等于编码信息的比特频率的两倍的频率，并且位于所述信息的功率谱的零点，使得所提取的信号可用于产生时钟信号。
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6.发明授权Method of demodulating a quadphase coded data signal and receiver for carrying out the method 失效解调用于执行该方法的四相编码数据信号和接收器的方法
公开(公告)号：US4292593A
公开(公告)日：1981-09-29
申请号：US053577
申请日：1979-06-29
IPC分类号： G11B20/14 , H03M5/12 , H04L7/00 , H04L25/03 , H04L25/48 , H04L25/49 , H04L27/227 , H03K13/01
CPC分类号： H04L25/4908
摘要： The invention relates to a method of demodulating a quadphase coded data signal and a receiver for carrying out the method. The quadphase code comprises four elementary wave forms, each wave form representing two bits of the original non-coded binary signal. An elementary wave form consists of four half bit intervals, the signal corresponding to the first and the second bit, respectively, being transmitted in the first and the second half bit interval and the signal corresponding to the inverted value of the first and the second bit, respectively, being transmitted in the third and the fourth half bit interval. In a receiver according to the invention such a signal is sampled in each of the four half bit intervals. In principle all information is already available after the sampling operations in the first and the second half bit interval, but by utilizing all four samples a proper protection from noise, interference and zero level shifts is obtained. The receiver determines the difference of the samples taken in the first and the third half bit interval and the difference of the samples taken in the second and the fourth bit interval. A positive difference represents a logic 1, a negative difference a logic 0.
摘要翻译： 本发明涉及一种解调四相编码数据信号的方法和一种用于执行该方法的接收机。 四相码包括四个基本波形，每个波形表示原始非编码二进制信号的两位。 基本波形由四个半位间隔组成，分别对应于第一和第二位的信号在第一和第二半位间隔中发送，并且对应于第一和第二位的反相值的信号 分别在第三和第四半位间隔中发送。 在根据本发明的接收机中，这样的信号在四个半位间隔中的每一个中被采样。 原则上，在第一和第二半位间隔中的采样操作之后，所有信息都已经可用，但是通过利用所有四个采样，获得适当的保护以防止噪声，干扰和零电平移位。 接收器确定在第一和第三半位间隔中采样的采样的差异以及在第二和第四位间隔中取样的差。 正差表示逻辑1，负差为逻辑0。
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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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8.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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9.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：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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