利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

130 条记录 (耗时 0.033 秒)

    Joint DC minimization and bit detection
    51.
    发明授权
    Joint DC minimization and bit detection 有权
    联合直流最小化和位检测

    公开(公告)号：US07916605B2

    公开(公告)日：2011-03-29

    申请号：US12414310

    申请日：2009-03-30

    申请人： John Anderson Fergus Ross ,  Aria Pezeshk

    发明人： John Anderson Fergus Ross ,  Aria Pezeshk

    IPC分类号： G11B5/09

    CPC分类号： H03M13/31 ,  G11B20/10009 ,  G11B20/10296 ,  G11B20/10379 ,  G11B20/1426 ,  G11B2020/1453 ,  G11B2020/1457 ,  G11B2220/2504 ,  G11B2220/2541 ,  H03M5/145 ,  H03M13/3905 ,  H03M13/3972

    摘要： The present techniques provide systems and methods for decoding a data signal with a control bit to improve bit estimation. The techniques in one embodiment involve using decoding algorithms to estimate the a posteriori state probabilities and the a posteriori transition probabilities of the data encoding, and estimating bit state probabilities. The techniques further involve using a control bit in the bit stream and comparing the estimation of the control bit state in the segment of the bit stream with a test control bit determined based on an average of bit states from the encoded segment of the bit stream. If the estimation of the control bit and the test control bit are not equal, the state of the bit estimate with the lowest confidence probability will be changed.

    摘要翻译： 本技术提供了利用控制位对数据信号进行解码以提高比特估计的系统和方法。 一个实施例中的技术涉及使用解码算法来估计后验状态概率和数据编码的后验转移概率，以及估计比特状态概率。 这些技术还涉及使用比特流中的控制比特并且比较比特流的片段中的控制比特状态的估计与基于来自比特流的编码片段的比特状态的平均值确定的测试控制比特。 如果控制位和测试控制位的估计不相等，则置信概率最低的位估计的状态将被改变。

    METHOD FOR DECODING UNDER OPTICAL AND ELECTRONIC NOISE
    52.
    发明申请
    METHOD FOR DECODING UNDER OPTICAL AND ELECTRONIC NOISE 有权
    光电噪声解码方法

    公开(公告)号：US20100246686A1

    公开(公告)日：2010-09-30

    申请号：US12414263

    申请日：2009-03-30

    申请人： Aria Pezeshk ,  John Anderson Fergus Ross

    发明人： Aria Pezeshk ,  John Anderson Fergus Ross

    IPC分类号： H04N11/02

    CPC分类号： G11B20/10009 ,  G11B20/10277 ,  G11B20/105 ,  G11B20/18 ,  G11B20/24 ,  G11B2020/1453 ,  G11B2220/2504 ,  G11B2220/2537

    摘要： The present techniques provide systems and methods for decoding an optical data signal in an optical system to retrieve source information while decreasing errors resulting from optical and electronic noise in the optical system. The techniques involve using decoding algorithms to estimate the a posteriori state probabilities and the a posteriori transition probabilities of the data encoding, and estimating bit state probabilities. The probability density function used to estimate bit states is parameterized by the expected optical and electronic noise in the optical system. Different optical and electronic noise variances, or different probability densities, may be stored in registers or look-up tables to be accessed by a decoder while decoding the optical data signal.

    摘要翻译： 本技术提供了用于解码光学系统中的光学数据信号的系统和方法，用于检索源信息，同时减少由光学系统中的光学和电子噪声引起的误差。 这些技术涉及使用解码算法来估计后验状态概率和数据编码的后验转移概率，以及估计比特状态概率。 用于估计位状态的概率密度函数由光学系统中预期的光学和电子噪声参数化。 可以将不同的光学和电子噪声方差或不同的概率密度存储在寄存器或查找表中，以在解码光学数据信号的同时被解码器访问。

    High-speed turbo decoder
    54.
    发明授权
    High-speed turbo decoder 有权
    高速turbo解码器

    公开(公告)号：US06304996B1

    公开(公告)日：2001-10-16

    申请号：US09263566

    申请日：1999-03-08

    申请人： Nick Andrew Van Stralen ,  John Anderson Fergus Ross ,  Stephen Michael Hladik ,  Abdallah Mahmoud Itani ,  Robert Gideon Wodnicki

    发明人： Nick Andrew Van Stralen ,  John Anderson Fergus Ross ,  Stephen Michael Hladik ,  Abdallah Mahmoud Itani ,  Robert Gideon Wodnicki

    IPC分类号： H03M1303

    CPC分类号： H03M13/3905 ,  H03M13/2957 ,  H03M13/3911 ,  H03M13/3922 ,  H03M13/3961 ,  H03M13/6561 ,  H03M13/6572 ,  H03M13/658 ,  H03M13/6583 ,  H03M13/6591

    摘要： A high-speed turbo decoder utilizes a MAP decoding algorithm and includes a streamlined construction of functional units, or blocks, amenable to ASIC implementation. A gamma block provides symbol-by-symbol a posteriori state transition probability estimates. Two gamma probability function values are provided via selection switches to the alpha and beta blocks for calculating the alpha and beta probability function values, i.e., performing the alpha and beta recursions, respectively, in parallel, thus significantly increasing decoding speed. A scaling circuit monitors the values of the alpha and beta probability functions and prescribes a scale factor such that all such values at a trellis level remain within the precision limits of the system. A sigma block determines the a posteriori state transition probabilities (sigma values) and uses the sigma values to provide soft-decision outputs of the turbo decoder.

    摘要翻译： 高速turbo解码器利用MAP解码算法，并且包括易于实施ASIC的功能单元或块的流线型结构。 伽马块提供逐符号的后验状态转换概率估计。 两个伽马概率函数值通过选择开关提供给α和β块用于计算α和β概率函数值，即分别执行α和β递归，从而显着增加解码速度。 缩放电路监视α和β概率函数的值，并规定了比例因子，使得网格级别上的所有这些值都保持在系统的精度限度内。 西格玛块确定后验状态转移概率（sigma值），并使用西格玛值来提供turbo解码器的软判决输出。

    General frame-based compression method
    56.
    发明授权
    General frame-based compression method 失效
    一般基于帧的压缩方法

    公开(公告)号：US6154155A

    公开(公告)日：2000-11-28

    申请号：US263579

    申请日：1999-03-08

    申请人： John Erik Hershey ,  Namita Joshi ,  Mark Lewis Grabb ,  John Anderson Fergus Ross ,  Thomas Gerard Nowak ,  Vincent Paul Staudinger

    发明人： John Erik Hershey ,  Namita Joshi ,  Mark Lewis Grabb ,  John Anderson Fergus Ross ,  Thomas Gerard Nowak ,  Vincent Paul Staudinger

    IPC分类号： H03M7/30 ,  H03M7/40 ,  H03M7/46

    CPC分类号： H03M7/46 ,  H03M7/30 ,  H03M7/40

    摘要： A method of coding and compressing telemetry data makes use of the fact that the telemetry frames are typically highly correlated at a distance, .delta., corresponding to commutation or data periodicities. The existence of such periodicity is used to render a portion of each frame to zeros. The next steps are to search for and remove correlations between the bits in a set of frames, denoted {F.sub.i *}. The compression algorithm implementing the method according to the invention has four sub-steps; Data preconditioning, Compression and coding of first frame, F.sub.1, Compression and coding of frames 2-.delta., F.sub.1 -F.sub..delta., and Compression and coding of F.sub..delta.+1 and on, the steady-state mode.

    摘要翻译： 一种编码和压缩遥测数据的方法利用遥测帧通常在与换向或数据周期性相对应的距离，delta处高度相关的事实。 这种周期性的存在被用于将每个帧的一部分渲染为零。 接下来的步骤是搜索和删除一组帧中的比特之间的相关性，表示为{Fi *}。 实现本发明方法的压缩算法具有四个子步骤： 数据预处理，第一帧的压缩和编码，F1，帧的压缩和编码2- delta，F1-F delta，以及F delta +1的压缩和编码，以及稳态模式。

    METHODS AND SYSTEMS FOR DECODING DATA
    58.
    发明申请
    METHODS AND SYSTEMS FOR DECODING DATA 有权
    解码数据的方法和系统

    公开(公告)号：US20130154859A1

    公开(公告)日：2013-06-20

    申请号：US13331625

    申请日：2011-12-20

    申请人： Budhaditya Deb ,  John Anderson Fergus Ross

    发明人： Budhaditya Deb ,  John Anderson Fergus Ross

    IPC分类号： H03M5/06

    CPC分类号： G11B20/1426 ,  G11B20/10287 ,  G11B2020/1453 ,  G11B2220/2504 ,  G11B2220/2537 ,  H03M5/145

    摘要： A method of decoding is presented. The method includes the steps of receiving a coded bit stream that is encoded using a Non Return to Zero Inverted (NRZI) code and a 17 Parity Preserve/Prohibit (17PP) code, determining a 17PP modulated bit stream based upon the coded bit stream using a first selected decoding method, and generating a plurality of decisions by processing the 17PP modulated bit stream using a second selected decoding method, wherein the received coded bit stream comprises a plurality of coded bits, and the plurality of decisions are estimates of a plurality of source bits in a source information.

    摘要翻译： 提出了一种解码方法。 该方法包括以下步骤：接收使用非归零（NRZI）码和17奇偶校验/禁止（17PP）码编码的编码比特流，基于编码比特流确定17PP调制比特流，使用 第一选择解码方法，并且通过使用第二选择的解码方法处理17PP调制比特流来生成多个决定，其中所接收的编码比特流包括多个编码比特，并且所述多个决定是多个 源信息中的源位。

    Bit probability estimation method for noisy modulation code
    59.
    发明授权
    Bit probability estimation method for noisy modulation code 有权
    噪声调制码的位概率估计方法

    公开(公告)号：US08327247B2

    公开(公告)日：2012-12-04

    申请号：US12414284

    申请日：2009-03-30

    申请人： John Anderson Fergus Ross ,  Aria Pezeshk

    发明人： John Anderson Fergus Ross ,  Aria Pezeshk

    IPC分类号： G06F11/00

    CPC分类号： G11B20/1833 ,  G11B7/0065 ,  G11B2020/1859 ,  G11B2220/2504 ,  H03M5/145

    摘要： The present techniques provide systems and methods for decoding an optical data signal returned from an optical disc to retrieve source information. The decoding method is based on a 16 state trellis diagram, and may decode an optical data signal encoded through a modulation code where the input-to-output relationship is not convolutional, such as the 17 Parity Preserve/Prohibit (17pp) modulation code. A trellis diagram may enable non-convolutional trellis-modulated data to be more efficiently decoded. Further, the 16 state trellis diagram of the present techniques provides a unique path for each input-to-output bit pair, such that no information about input bits may be lost on parallel paths in a trellis diagram.

    摘要翻译： 本技术提供了用于解码从光盘返回的光学数据信号以检索源信息的系统和方法。 解码方法基于16状态网格图，并且可以解码通过调制码编码的光数据信号，其中输入到输出关系不是卷积的，例如17奇偶校验保持/禁止（17pp）调制码。 网格图可以使非卷积网格调制数据更有效地解码。 此外，本技术的16状态网格图为每个输入到输出位对提供唯一的路径，使得在格子图中的并行路径上不能丢失关于输入位的信息。