公开(公告)号：WO2018140206A1

公开(公告)日：2018-08-02

申请号：PCT/US2018/012401

申请日：2018-01-04

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  DUEWER, Bruce ,  KAMKAR, Shafagh ,  HESTER, Dylan

Inventor： DUEWER, Bruce ,  KAMKAR, Shafagh ,  HESTER, Dylan

IPC: H03M5/12 ,  H03M5/14 ,  H03M7/50 ,  H03M5/08 ,  H03M1/68

Abstract: Audio content in a single-bit audio stream can be reproduced at a transducer by mapping the single-bit audio stream to symbols in a multi-bit audio stream. Volume control may be implemented, in part, in the digital domain and, in part, in the analog domain. In the digital domain, when converting the single-bit audio stream to a plurality of symbols, the plurality of symbols is selected based, at least in part, on audio content of the single-bit audio stream and a desired volume level. In the analog domain, when converting an analog current signal output from a current- steering DAC processing the plurality of symbols to an analog voltage signal, an analog gain value may be selected based, at least in part, on the desired volume level.

公开(公告)号：WO2018140205A1

公开(公告)日：2018-08-02

申请号：PCT/US2018/012392

申请日：2018-01-04

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. ,  KAMKAR, Shafagh ,  DUEWER, Bruce ,  HESTER, Dylan

Inventor： KAMKAR, Shafagh ,  DUEWER, Bruce ,  HESTER, Dylan

IPC: H03M5/12 ,  H03M5/14 ,  H03M7/50 ,  H03M5/08

Abstract: A single-bit audio stream can be converted to a modified single-bit audio stream with a constant edge rate while maintaining a modulation index of the original audio stream using direct mapping. With direct mapping, a pre-filter bank may be combined with a multi-bit symbol mapper to select symbols for the modified audio stream with a constant edge rate per symbol and the same modulation index as the original audio stream. The output of the pre-filter bank may be an audio stream with no consecutive full-scale symbols. Using the output of the pre-filter bank, a multi-bit symbol mapper may use the symbol selector to output a symbol with a constant edge rate per symbol and the same modulation index as the original signal. The symbols may be converted to an analog signal for reproduction of audio content using a transducer.

公开(公告)号：WO2005096506A1

公开(公告)日：2005-10-13

申请号：PCT/US2004/018619

申请日：2004-06-10

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： WIDMER, Albert, X.

IPC: H03M5/14

CPC classification number: H03M5/145 ,  H04L25/4908

Abstract: A transmission code which packs six bits of data and four control vectors into an eight-bit format is presented. A direct current (DC)-balanced 6B/8B transmission code is produced from an input data stream that includes one or more six-bit source vectors. A given coded vector is created in accordance with an eight binary digit coded vector set. The given coded vector has eight binary digits and the given coded vector corresponds to a given six-bit source vector. Each coded vector in the eight binary digit coded vector set is balanced. The given coded vector is output.

Abstract translation: 提出了将六位数据和四位控制向量分组为八位格式的传输码。 从包括一个或多个六位源向量的输入数据流产生直流（DC）平衡6B / 8B传输码。 根据八位二进制数字编码向量集创建一个给定的编码向量。 给定的编码向量具有八个二进制数字，给定的编码向量对应于给定的六比特源向量。 八位二进制数字编码矢量集中的每个编码矢量均衡。 输出给定的编码矢量。

公开(公告)号：WO2004032334A1

公开(公告)日：2004-04-15

申请号：PCT/IB2003/004148

申请日：2003-09-17

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  COENE, Willem, M., J., M. ,  IMMINK, Albert, H., J. ,  BERGMANS, Johannes, W., M.

Inventor： COENE, Willem, M., J., M. ,  IMMINK, Albert, H., J. ,  BERGMANS, Johannes, W., M.

IPC: H03M5/14

CPC classification number: G11B20/1217 ,  G11B20/10009 ,  G11B20/1426 ,  G11B2020/1249 ,  G11B2020/1288 ,  G11B2220/2541 ,  H03M5/145

Abstract: The present invention relates to a bit detection method for detecting the bit values of bits of a channel data stream stored on a record carrier, wherein the channel data stream resides on an N-dimensional lattice of bits and comprises a plurality of contiguous bit units, each bit unit comprising at least one bit, wherein bit detection for the channel data stream is performed by an iterative procedure, each iteration being carried out on the basis of said bit units, wherein the bit values of the bits of a bit unit are detected by said iterative procedure based on the received HF signal values of the bits of said bit unit. The proposed method comprises an initialisation step, an updating step and an iteration such the method the bits are detected in an iterative but non-recursive way which allow for a high level of parallel processing in the implementation. In the proposed bit detection method, an evaluation criterion is used which is based on the difference between the received HF-signal and a reference HF-signal for each bit of a bit unit consisting of a plurality of bits, where the reference HF-signal depends on the bit value of the bit to be updated, and on its neighbouring bits, for which bit decisions in a previous iteration step are used. Thus, a high capacity, in particular in two-dimensional optical storage, can be achieved which substantially improves the performance of a threshold detector. Hence, the bit detection method according to the invention does not prohibit implementations aimed for high data-rates.

Abstract translation: 本发明涉及一种用于检测存储在记录载体上的信道数据流的比特值的比特检测方法，其中信道数据流驻留在比特的N维网格上，并且包括多个连续比特单元， 每个比特单元包括至少一个比特，其中通过迭代过程执行所述信道数据流的比特检测，每个迭代是基于所述比特单元执行的，其中检测比特单元的比特的比特值 通过所述迭代过程，基于所接收的所述比特单元的比特的HF信号值。 所提出的方法包括初始化步骤，更新步骤和迭代，使得该方法以迭代但非递归方式检测比特，这允许在实现中进行高水平的并行处理。 在提出的比特检测方法中，使用基于由多个比特组成的比特单元的每个比特的接收HF信号和参考HF信号之间的差异的评估标准，其中参考HF信号 取决于要更新的​​位的位值，以及在其相邻位中使用先前迭代步骤中哪个位决定。 因此，可以实现高容量，特别是二维光学存储，这大大提高了阈值检测器的性能。 因此，根据本发明的比特检测方法不禁止针对高数据速率的实现。

公开(公告)号：WO2003063358A2

公开(公告)日：2003-07-31

申请号：PCT/IB2002/005604

申请日：2002-12-18

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  SCHOUHAMER IMMINK, Kornelis, A.

Inventor： SCHOUHAMER IMMINK, Kornelis, A.

IPC: H03M5/14

CPC classification number: H03M5/145 ,  G11B20/1426

Abstract: A method of converting m-bit information words to a runlength constrained modulated signal is described. The available code words are distributed over at least one group (G1) of a first type and at least one group (G2) of a second type. The delivery of a code word belonging to the group of the first or second type establishes a coding state of the first type (S1) or one of a number r of coding states (S2, S3) of the second type depending on the current information word. For each information word a subset of code words is available, which subset has at leastone disjunct code word for each of the r coding states. The selection from the subset of the code word to be delivered is based the coding state, on dynamically verifying the runlength constraint for the sequence of code words, and on an additional criterion, like the low frequency content of the modulated signal.

Abstract translation: 描述了将m位信息字转换为游程受限调制信号的方法。 可用代码字分布在第一类型的至少一个组（G1）和第二类型的至少一个组（G2）中。 属于第一类或第二类的组的码字的传送根据当前信息建立第一类型（S1）的编码状态或第二类型的编码状态（S2，S3）的数目r之一 字。 对于每个信息字，代码字的子集可用，哪个子集对于r个编码状态中的每一个具有至少一个分离码字。 来自要传送的码字的子集的选择基于编码状态，动态地验证码字序列的游程长度约束，以及附加标准，如调制信号的低频内容。

公开(公告)号：WO2003034595A1

公开(公告)日：2003-04-24

申请号：PCT/IB2002/004244

申请日：2002-10-14

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  COENE, Willem, M., J., M.

Inventor： COENE, Willem, M., J., M.

IPC: H03M5/14

CPC classification number: H03M5/145 ,  G11B7/14 ,  G11B7/24085 ,  G11B7/24088 ,  G11B20/1426

Abstract: The present invention relates to a method and system for multi-dimensionally coding and/or decoding an information to/from a lattice structure representing bit positions of said coded information in at least two dimensions. Encoding and/or decoding is performed by using a close-packed lattice structure, preferably a quasi-hexagonal lattice structure. In particular, at least partial quasi-hexagonal clusters consisting of one central bit and a plurality of nearest neighboring bits can be defined, and a code constraint can be applied such that for each of said at least partial quasi-hexagonal clusters a predetermined minimum number of said nearest neighboring bits are of the same bit state as said central bit. Thereby, intersymbol interferences can be minimized at a high code efficiency. Furthermore, another code constraint can be applied such that for each of said at least partial quasi-hexagonal clusters a predetermined minimum number of said nearest neighboring bits are of the opposite bit state as said central bit. This constraint provides an advantageous high pass characteristic to avoid large areas of channel bits of the same type.

Abstract translation: 本发明涉及用于在表示至少二维的所述编码信息的位位置的格式结构中进行信息的多维编码和/或解码的方法和系统。 编码和/或解码通过使用紧密堆叠的晶格结构，优选为准六边形网格结构来执行。 特别地，可以定义由一个中心位和多个最近相邻位组成的至少部分准六边形簇，并且可以应用代码约束，使得对于所述至少部分准六边形簇中的每一个，预定最小数目 的所述最近相邻位与所述中心位具有相同的位状态。 从而可以以较高的代码效率将码间干扰最小化。 此外，可以应用另一代码约束，使得对于所述至少部分准六边形簇中的每一个，所述最近相邻位的预定最小数目与所述中心位具有相反的位状态。 该约束提供了有利的高通特性，以避免相同类型的通道位的大面积。

公开(公告)号：WO2003021791A3

公开(公告)日：2003-03-13

申请号：PCT/IB2002/003530

申请日：2002-08-27

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： WONG-LAM, Ho, W ,  SCHOUHAMER IMMINK, Kornelis, A. ,  VAN UIJEN, Cornelis, M., J.

IPC: H03M5/14

Abstract: The invention relates to a modulation code system, including an encoder and a decoder and two corresponding modulation code methods. More specifically, the encoder (100) serves for transforming an original signal s into an encoded signal c satisfying predefined second constraints. Such encoder signals are, for example, transmitted via a channel (300) or stored on a recording medium. After receipt or restoration, said encoded signal c is decoded by a decoder (200) in order to regenerate the original signal s again. It is the object of the present invention to improve the known modulation code systems and methods in such a way that their embodiment requires less hardware. This object is solved in that the encoder (100) comprises a series connection of a modulation code encoder (110) and of a transformer encoder (120) allowing an N-time integration of the output signal of said modulation code encoder (110). Moreover, this object is solved by embodying the decoder (200) by a series connection of a transformer decoder (220) for N-times differentiating the encoded signal c, and a modulation code decoder (210). N is an integer greater than 1.

公开(公告)号：WO2002091586A3

公开(公告)日：2002-11-14

申请号：PCT/US2002/013798

申请日：2002-04-30

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  WIDMER, Albert, X.

Inventor： WIDMER, Albert, X.

IPC: H03M5/14

Abstract: During decoding and encoding, the starting disparity of a current block is computed by using a disparity at some previous reference point and disparity characteristics of bytes from the reference point to a current block boundary. The characteristics of the bytes are whether the bytes are unbalanced coded vectors and whether the number of unbalanced vectors is even or odd. Alternately, the characteristics of the bytes are whether the bytes are balanced and how many balanced coded vectors exist. New classifications are created for encoding and decoding 3B/4B and 5B/6B transmission codes. Separate functions are created that address specifically disparity aspects. A dispartiy violation at the front of a byte is detected during decoding by comparing a required front-end disparity of the byte with the actual running disparity by assuming the actual running disparity is equivalent to an exit disparity of the next preceding byte that is disparity dependent.

公开(公告)号：WO02039447A1

公开(公告)日：2002-05-16

申请号：PCT/NL2001/000816

申请日：2001-11-09

IPC: G11B20/10 ,  G11B20/00 ,  G11B20/12 ,  G11B20/14 ,  H03M5/14

CPC classification number: G11B20/00579 ,  G11B20/00086 ,  G11B20/1426 ,  G11B2020/1457 ,  G11B2020/1461 ,  G11B2020/1469 ,  H03M5/145

Abstract: A record carrier, and method for manufacturing such record carrier, which can be copied with the aid of a copying apparatus, whilst the copied record carrier is unreadable. During copying with the aid of the copying apparatus, merge bits are selected such that consecutive channel bits of a first type, the type "1", are separated by at least Ia and at most Ib consecutive and continuous bits of the second type, the type "O", and vice versa. The original record carrier, at least over a number of neighboring blocks of channel bits, is provided with specific blocks of merge bits, while consecutive channel bits of one type are separated by Ic or Id consecutive bits of the other type, with Ic

Abstract translation: 一种记录载体，以及用于制造这种记录载体的方法，其可以借助复印装置复制，同时复制的记录载体是不可读的。 在借助于复印装置的复制期间，选择合并位使得第一类型的类型“1”的连续通道位与第二类型的至少Ia和至多1b个连续和连续的位分开， 键入“O”，反之亦然。 至少在多个相邻的信道比特块上的原始记录载体被提供有合并位的特定块，而一种类型的连续信道位由另一类型的Ic或Id连续位分开，其中Ic

公开(公告)号：WO0177782A3

公开(公告)日：2002-03-07

申请号：PCT/US0111440

申请日：2001-04-06

Applicant: ACTISYS CORP

Inventor： WANG LICHEN ,  YEH KEMING W

IPC: H03M5/14 ,  H04L25/49 ,  H04B14/04 ,  H04L12/403

CPC classification number: H03M5/145 ,  H04L25/4908

Abstract: A method includes a data encoding scheme that has a run length limit of (1,6) and a 25% duty cycle. With error correction, said method achieves an effective run length limit of (2,9). The method can be used in conjunction with a packetized communication protocol to allow multiple controllers to communicate with multiple peripheral devices in a wireless data network. Peripheral devices includes pointing devices, keyboards and game pads.

Abstract translation: 一种方法包括具有游程长度限制（1,6）和25％占空比的数据编码方案。 通过纠错，所述方法实现了有效的运行长度限制（2,9）。 该方法可以与分组通信协议结合使用，以允许多个控制器与无线数据网络中的多个外围设备进行通信。 外围设备包括指点设备，键盘和游戏键盘。