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公开(公告)号：US5140474A
公开(公告)日：1992-08-18
申请号：US712166
申请日：1991-06-06
CPC分类号： G11B5/0086 , G11B15/463 , G11B20/1426 , G11B5/5921 , H03M5/145
摘要： In a run length limited digital signal of the d,k type, (d+m)-bit digital words are inserted at specific instants in the data stream in a manner such that the signal thus obtained is a run length limited signal of the d,k' type, where k' is greater than or equal to k. This signal is then encoded in an aT precoder, a being an integer such that a .gtoreq.1, and recorded on a magnetic record carrier (21). Such (d+m)-bit digital words are inserted so that the digital sum value of the output signal of the precoder has a desired pattern as a function of time. Thus, for example, a pilot signal can be accommodated in the output data stream of the precoder, which pilot signal can be detected during reproduction of the recorded signal. From this detected pilot signal a control signal can be derived for controlling tracking during reproduction of the recorded signal.
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12.发明授权Apparatus for decoding a channel signal into an information signal and reproducing arrangement provided with the apparatus 失效用于将信道信号解码成信息信号的装置和具有该装置的再现装置
公开(公告)号：US6038274A
公开(公告)日：2000-03-14
申请号：US730689
申请日：1996-10-11
IPC分类号： G11B20/14 , G11B20/18 , G11B27/30 , H03M7/14 , H03M7/20 , H03M13/00 , H03M13/51 , H04L7/04 , H04L7/00
CPC分类号： H04L7/042 , G11B20/1403 , G11B20/1876 , G11B27/3027 , G11B20/1426
摘要： An apparatus for decoding a channel signal into an information signal is disclosed. The channel signal comprises subsequent blocks of information, a block of information comprising a sync word and a plurality of channel words. The information signal includes subsequent information words. The apparatus includes an input terminal for receiving the channel signal, a conversion unit for converting the channel words into the information words, and an error concealment unit. The information signal obtained is supplied to an output terminal. The conversion unit includes a channel word detector for establishing whether channel words received are channel words not belonging to a group of valid channel words. If so, the channel word detector is adapted to supply a detection signal upon such detection. This enables the detection signals to be counted so as to establish a mis-synchronization of the decoding apparatus.
摘要翻译： 公开了一种将信道信号解码为信息信号的装置。 信道信号包括随后的信息块，包括同步字和多个信道字的信息块。 信息信号包括后续信息字。 该装置包括用于接收信道信号的输入端，用于将信道字转换为信息字的转换单元和错误隐藏单元。 获得的信息信号被提供给输出端。 转换单元包括一个通道字检测器，用于确定接收到的通道字是否不属于一组有效通道字的通道字。 如果是这样，则通道字检测器适于在这种检测时提供检测信号。 这使得能够对检测信号进行计数，以便建立解码装置的错误同步。
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13.发明授权
公开(公告)号：US4802190A
公开(公告)日：1989-01-31
申请号：US45921
申请日：1987-06-15
CPC分类号： H04L25/4906 , H03M5/145
摘要： Method of transmitting information by means of code signals, information transmission systems for carrying out the method, and transmitting and receiving apparatus for use in the information transmission system.A method of and system for transmitting n-bit information words is revealed, using code signals (Sc, x.sub.i) in which the bits (b.sub.1, b.sub.2, b.sub.3, b.sub.4) having corresponding bit positions in different information words are always represented by frequency components (fd1, fd2, fd3, fd4; fh1, fh2, fh3, fh4) in the same frequency range of the frequency spectra of the code signals (Sc, x.sub.i). Bits having different bit positions are represented by frequency components which are situated in different frequency ranges of the frequency spectra of the code signals. After transmission of the code signals the individual bits of the information words are recovered by means of frequency-domain detection.
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14.发明授权Method of encoding n-bit information words into m-bit code words, apparatus for carrying out said method, method of decoding m-bit code words into n-bit information words, and apparatus for carrying out said method 失效将n位信息字编码成m位码字的方法，用于执行所述方法的装置，将m位码字解码成n位信息字的方法，以及用于执行所述方法的装置
公开(公告)号：US4573034A
公开(公告)日：1986-02-25
申请号：US676467
申请日：1984-11-29
CPC分类号： H04L25/4906 , G11B20/1426
摘要： A method of encoding n-bit information words into m-bit code words and the other way round is described, which code words have a specific disparity d and a digital sum value which is limited to values p and q. In order to enable encoding and decoding without the use of an extensive look-up table, use is made of a series of numbers which is a modified version of numbers in conformity with the Newton binomial. By means of this modified series, the n-bit information words, which are arranged in conformity with their binary weights, are mapped lexicographically and unambiguously onto code words with said limitations, and the other way round.
摘要翻译： 描述了将n位信息字编码成m位码字的方法，另一方面描述了哪些码字具有特定差异d和限于值p和q的数字和值。 为了在不使用广泛的查找表的情况下进行编码和解码，使用一系列数字，其是与牛顿二项式一致的数字的修改版本。 通过这个修改后的系列，按照它们的二进制权重排列的n位信息字在字面上和明确地映射到具有所述限制的代码字上，反之亦然。
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15.发明授权Encoding arrangement and method for encoding (n-1)-bit information words into n-bit channel words and decoding arrangement and method for decoding the channel words into information words 失效用于将（n-1）位信息字编码成n比特信道字的编码布置和方法以及用于将信道字解码成信息字的解码布置和方法
公开(公告)号：US5854596A
公开(公告)日：1998-12-29
申请号：US891341
申请日：1997-07-10
CPC分类号： H03M5/145
摘要： An encoding arrangement, a method for encoding (n-1)-bit information words into n-bit channel words, and a decoding arrangement and method for decoding the channel words into information words, in which the encoding arrangement forms a channel signal of concatenated channel words including a bit sequence having, at most, k "zeroes" between "ones". The encoding arrangement includes an input for receiving the (n-1)-bit information words, a converter for converting the (n-1)-bit information words into n-bit channel words, and an output for supplying the channel signal.
摘要翻译： 编码装置，将n-1位信息字编码成n比特信道字的方法，以及将信道字解码为信息字的解码装置和方法，其中编码装置形成级联的信道信号 包括最多在“1”之间k“零”的比特序列的信道字。 编码装置包括用于接收第（n-1）位信息字的输入端，用于将第（n-1）位信息字转换成n位信道字的转换器和用于提供信道信号的输出。
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16.发明授权Encoding arrangement for encoding a sequence of (N-1)-bit information words into a sequence of N-bit channel words, and a deciding arrangement for decoding a sequence of N-bit channel words in a sequence of (N-1)-bit information words 失效（N-1）位信息字序列编码为N位信道字序列的编码装置，以及（N-1）位信息字序列中的N位信道字序列的解码装置， 位信息字
公开(公告)号：US5760718A
公开(公告)日：1998-06-02
申请号：US599527
申请日：1996-02-02
CPC分类号： H03M5/145
摘要： Encoding arrangement for encoding a sequence of (n-1)bit information words into a sequence of n-bit channel words, and a decoding arrangement for decoding a sequence of n-bit channel words into a sequence of (n-1)-bit information words. The encoding arrangement comprises input means for receiving the information words, converter means for converting the (n-1)-bit information words into n-bit channel words and output means for supplying the channel words. The converter means comprises weight vector coefficient supply means for supplying a weight vector w, the weight vector having n weight vector coefficients w.sub.i, where i is an integer running from 1 to n and the weight vector coefficients being in the form of (n-1)-bit binary words, and calculation means for carrying out a calculation using an information word so as to obtain a channel word. The weight vector coefficient supply means is adapted to supply only p bits of a weight vector coefficient w.sub.i, the remaining n-1-p bits of the (n-1)-bit weight vector coefficient word being `zeroes` to be added before or after the p-bit binary word or before and after the p-bit binary word so as to obtain said weight vector coefficient, and that p is an integer smaller than n-1.
摘要翻译： 用于将（n-1）位信息字序列编码成n位通道字序列的编码装置，以及用于将n位通道字序列解码为（n-1）位序列的解码装置 信息词。 编码装置包括用于接收信息字的输入装置，用于将（n-1）位信息字转换成n位信道字的转换装置和用于提供信道字的输出装置。 转换器装置包括权重向量系数提供装置，用于提供权重向量w，权重向量具有n个权重向量系数wi，其中i是从1到n的整数，权重向量系数是（n-1）形式 ）位二进制字，以及计算装置，用于使用信息字执行计算，以获得信道字。 权重向量系数提供装置仅适用于仅提供加权矢量系数wi的p位，第（n-1）位权重向量系数字的剩余n-1-p位为“零” 在p位二进制字之后或p位二进制字之前和之后，以获得所述权重向量系数，并且p是小于n-1的整数。
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17.发明授权Method of converting a series of m-bit information words to a modulated signal, method of producing a record carrier, coding device, decoding device, recording device, reading device, signal, as well as record carrier 失效将一系列m位信息字转换为调制信号的方法，制作记录载体的方法，编码装置，解码装置，记录装置，读取装置，信号以及记录载体
公开(公告)号：US5696505A
公开(公告)日：1997-12-09
申请号：US385533
申请日：1995-02-08
IPC分类号： G11C7/00 , G11B20/00 , G11B20/10 , G11B20/12 , G11B20/14 , G11B23/00 , H03M5/04 , H03M5/14 , H03M7/14 , H03M7/20 , H04L7/04 , H03M7/00
CPC分类号： H03M5/145 , G11B20/1426 , H04L7/041
摘要： A a series of m-bit information words is converted to a modulated signal. For each information word from the series, an n-bit code word is delivered. The delivered code words are converted to the modulated signal. The code words are distributed over at least one group of a first type and at least one group of a second type. When a code word belonging to a group of the first type is delivered, its group establishes a coding state of a first type. When a code word belonging to an group of the second type is delivered, a coding state of a second type is established which is determined by the information word which is to be converted to the delivered code word. When one of the code words is assigned to the received information word, this code word is selected from a set of code words which depends on the coding state established. The sets of code words belonging to the coding states of the second type are disjunct. In this coding method, the number of unique bit combinations that may be established by the code words in the series are enlarged. The modulated signal obtained may be reconverted to information words by first converting the modulated signal to a series of code words and then assigning an information word to each of the code words from the series in dependence on the code word to be converted and also in dependence on the logical values of the bit string bits which are situated at predetermined positions relative to the code word.
摘要翻译： 将一系列m位信息字转换成调制信号。 对于来自该系列的每个信息字，传送n位码字。 传送的代码字被转换成调制信号。 代码字分布在至少一组第一类型和至少一组第二类型上。 当传送属于第一类型的码字的码字时，其组建立第一类型的编码状态。 当传送属于第二类型的码字的码字时，建立第二类型的编码状态，该编码状态由要被转换为所递送的码字的信息字确定。 当代码字中的一个被分配给所接收的信息字时，该代码字从取决于所建立的编码状态的一组代码字中选择。 属于第二类编码状态的码字集合是分离的。 在该编码方法中，可以通过该系列中的码字建立的唯一位组合的数量被放大。 所获得的调制信号可以通过首先将调制信号转换为一系列码字，然后根据要转换的码字以及依赖的方式将序列中的每个码字分配给每个码字，从而再转换为信息字 位于相对于码字的预定位置的位串比特的逻辑值。
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18.发明授权Method of encoding a stream of data bits, arrangement for performing the method and arrangement for decoding the stream of channel bits obtained in accordance with this method 失效编码数据比特流的方法，用于执行用于解码根据该方法获得的信道比特流的方法和装置的装置
公开(公告)号：US4641128A
公开(公告)日：1987-02-03
申请号：US613126
申请日：1984-05-23
CPC分类号： G11B20/1426
摘要： Method of connecting a stream of data bits of a binary source signal into a stream of data bits of a binary channel signal. The data bit stream of the source signal is divided into a sequence of five authorized source words of variable lengths. Each of these five authorized source words are converted into a channel word having twice the number of data bits. This conversion has been chosen such that a very small error propagation is obtained and that at the same time very simple electronics are required. For dividing the data bit stream into information blocks and for providing the timing during the decoding operation a very suitable synchronizing word is used.
摘要翻译： 将二进制源信号的数据位流连接成二进制信道信号的数据位流的方法。 源信号的数据比特流被划分为可变长度的五个授权源字的序列。 这五个授权源字中的每一个被转换成具有两倍数据位数的通道字。 已经选择了这种转换，使得获得非常小的误差传播，并且同时需要非常简单的电子器件。 为了将数据比特流分解成信息块，并且在解码操作期间提供定时，使用非常合适的同步字。
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公开(公告)号：US6031871A
公开(公告)日：2000-02-29
申请号：US887981
申请日：1997-07-03
CPC分类号： H04L1/0057 , G11B20/00007 , G11B20/1833 , H03M13/00 , H04L1/0041 , H04L1/0045 , H04L1/0072
摘要： An apparatus for transmitting a digital information signal includes an input terminal for receiving the digital information signal, a first channel encoding unit for carrying out a first channel encoding step on an information word in a series of subsequent information words included in the digital information signal so as to obtain a channel word, a compression unit for carrying out a compression step on a channel word so as to obtain a compressed channel word, an error correction encoding unit for carrying out an error correction encoding of the compressed channel word so as to obtain a parity word, a second channel encoding unit for carrying out a second channel encoding step on the parity word so as to obtain a channel encoded parity word, and a formatting unit for combining the channel word and the channel encoded parity word into a composite transmission signal suitable for transmission via a transmission medium. With such apparatus, very long information words can be converted into channel words, while serious error propagation is avoided during transmission.
摘要翻译： 用于发送数字信息信号的装置包括：用于接收数字信息信号的输入端;第一信道编码单元，用于对包含在数字信息信号中的一系列后续信息字中的信息字执行第一信道编码步骤， 为了获得一个通道字，一个压缩单元，用于对一个通道字执行一个压缩步骤，以获得一个压缩的通道字;一个纠错编码单元，用于对压缩的通道字执行纠错编码，从而获得 奇偶校验字，第二信道编码单元，用于在奇偶校验字上执行第二信道编码步骤，以获得信道编码奇偶校验字;以及格式化单元，用于将信道字和信道编码奇偶校验字组合成复合传输 信号适合通过传输介质的传输。 使用这样的装置，可以将非常长的信息字转换为通道字，而在传输期间避免严重的错误传播。
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20.发明授权Encoding arrangement and method for encoding(N-1)-bit information words into N-bit channel words and decoding arrangement and method for decoding the channel words into information words 失效用于将（N-1）位信息字编码成N比特信道字的编码布置和方法以及用于将信道字解码成信息字的解码布置和方法
公开(公告)号：US5774077A
公开(公告)日：1998-06-30
申请号：US595534
申请日：1996-02-02
CPC分类号： H03M5/145
摘要： Encoding arrangement and method for encoding (n-1) information words into n-bit channel words and decoding arrangement and method for decoding the channel words into information words. The encoding arrangement is to obtain a channel signal of concatenated channel words comprising a bit sequence having at most k `zeroes` between `ones`. The encoding arrangement comprises input means for receiving the (n-1)-bit information words, converting means for converting the (n-1) bit information words into n-bit channel words and output means for supplying the channel signal. A corresponding decoding arrangement is also disclosed.
摘要翻译： 用于将n-1个信息字编码成n位通道字的编码装置和方法以及用于将信道字解码成信息字的解码排列和方法。 编码装置是获得包括在'1'之间具有至多k'零'的比特序列的级联信道字的信道信号。 编码装置包括用于接收（n-1）位信息字的输入装置，用于将（n-1）比特信息字转换成n位信道字的转换装置和用于提供信道信号的输出装置。 还公开了相应的解码装置。
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