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    Wyner-Ziv coding based on TCQ and LDPC codes
    1.
    发明授权
    Wyner-Ziv coding based on TCQ and LDPC codes 有权
    基于TCQ和LDPC码的Wyner-Ziv编码

    公开(公告)号：US08207874B2

    公开(公告)日：2012-06-26

    申请号：US12185545

    申请日：2008-08-04

    申请人： Yang Yang ,  Zixiang Xiong

    发明人： Yang Yang ,  Zixiang Xiong

    IPC分类号： H03M7/00

    CPC分类号： H03M7/30 ,  H03M7/3082 ,  H03M13/1102 ,  H03M13/6312

    摘要： An encoder employs a trellis coded quantization (TCQ) unit and a compression unit. The TCQ uses a set of polynomials that have been selected to maximize granular gain. The TCQ unit operates on a block of samples from a source. The compression unit compresses bit planes of the TCQ output, using parity check matrices of corresponding LDPC codes, to obtain corresponding syndromes. The parity check matrices are selected so their compression performance approaches close to the limit for Slepian-Wolf coding. A decoder employs a decoding unit and an estimation unit. The decoding unit decodes the syndromes using side information to produce an estimate for the TCQ output. The side information is correlated with the source. The estimation unit estimates the block of source samples using the estimated TCQ output and the side information. Trellis coded vector quantization may be used as an alternative to TCQ.

    摘要翻译： 编码器采用网格编码量化（TCQ）单元和压缩单元。 TCQ使用一组已经选择的多项式来最大化粒度增益。 TCQ单元对来自源的样本块进行操作。 压缩单元使用相应LDPC码的奇偶校验矩阵来压缩TCQ输出的比特平面，以获得相应的校验子。 选择奇偶校验矩阵，使其压缩性能接近Slepian-Wolf编码的极限。 解码器采用解码单元和估计单元。 解码单元使用边信息解码校正子，以产生TCQ输出的估计。 侧面信息与源相关。 估计单元使用估计的TCQ输出和侧面信息来估计源样本块。 网格编码矢量量化可以用作TCQ的替代。

    Wyner-Ziv Coding Based on TCQ and LDPC Codes
    4.
    发明申请
    Wyner-Ziv Coding Based on TCQ and LDPC Codes 有权
    基于TCQ和LDPC码的Wyner-Ziv编码

    公开(公告)号：US20090031191A1

    公开(公告)日：2009-01-29

    申请号：US12185545

    申请日：2008-08-04

    申请人： Yang Yang ,  Zixiang Xiong

    发明人： Yang Yang ,  Zixiang Xiong

    IPC分类号： H03M13/00 ,  G06F11/00

    CPC分类号： H03M7/30 ,  H03M7/3082 ,  H03M13/1102 ,  H03M13/6312

    摘要： An encoder employs a trellis coded quantization (TCQ) unit and a compression unit. The TCQ uses a set of polynomials that have been selected to maximize granular gain. The TCQ unit operates on a block of samples from a source. The compression unit compresses bit planes of the TCQ output, using parity check matrices of corresponding LDPC codes, to obtain corresponding syndromes. The parity check matrices are selected so their compression performance approaches close to the limit for Slepian-Wolf coding. A decoder employs a decoding unit and an estimation unit. The decoding unit decodes the syndromes using side information to produce an estimate for the TCQ output. The side information is correlated with the source. The estimation unit estimates the block of source samples using the estimated TCQ output and the side information. Trellis coded vector quantization may be used as an alternative to TCQ.

    摘要翻译： 编码器采用网格编码量化（TCQ）单元和压缩单元。 TCQ使用一组已经选择的多项式来最大化粒度增益。 TCQ单元对来自源的样本块进行操作。 压缩单元使用相应LDPC码的奇偶校验矩阵来压缩TCQ输出的比特平面，以获得相应的校验子。 选择奇偶校验矩阵，使其压缩性能接近Slepian-Wolf编码的极限。 解码器采用解码单元和估计单元。 解码单元使用边信息解码校正子，以产生TCQ输出的估计。 侧面信息与源相关。 估计单元使用估计的TCQ输出和侧面信息来估计源样本块。 网格编码矢量量化可以用作TCQ的替代。

    Enhanced method for digital data hiding
    5.
    发明授权
    Enhanced method for digital data hiding 失效
    数字数据隐藏的增强方法

    公开(公告)号：US07076659B2

    公开(公告)日：2006-07-11

    申请号：US10082551

    申请日：2002-02-25

    申请人： Szeming Cheng ,  Hong Heather Yu ,  Zixiang Xiong

    发明人： Szeming Cheng ,  Hong Heather Yu ,  Zixiang Xiong

    IPC分类号： H04B1/69 ,  H04K1/06 ,  H04L9/00 ,  H04N7/16

    CPC分类号： G06T1/0035 ,  G06T2201/0052 ,  G06T2201/0053 ,  G10L19/018

    摘要： A method is provided for enhanced spread spectrum watermarking. The improved watermarking method includes: receiving host data which is expressed in a transform domain by a plurality of host transform parameters; reducing variance between the plurality of host transform parameters, thereby forming an enhanced sequence of host transform parameters; and adding a watermark to the enhanced sequence of host transform parameters using a spread spectrum technique. The enhanced sequence of host transform parameters may be formed by arranging the plurality of host transform parameters in at least one of an ascending order or descending order; determining a difference for each pair of consecutive host transform parameters; and alternating the sign of every other difference value, thereby forming the enhanced sequence of host transform parameters.

    摘要翻译： 提供了一种用于增强扩频水印的方法。 改进的水印方法包括：通过多个主机变换参数接收在变换域中表达的主机数据; 减少多个主机变换参数之间的差异，由此形成增强的主机变换参数序列; 并使用扩展频谱技术将水印添加到主变换参数的增强序列中。 可以通过以升序或降序中的至少一个排列多个主机变换参数来形成增强的主机变换参数序列; 确定每对连续宿主变换参数的差异; 并交替每个其他差值的符号，从而形成增强的主机变换参数序列。

    Memory efficient 3-D wavelet transform for video coding without boundary effects
    6.
    发明授权
    Memory efficient 3-D wavelet transform for video coding without boundary effects 失效
    用于无边界效应的视频编码的高效的3-D小波变换

    公开(公告)号：US06795504B1

    公开(公告)日：2004-09-21

    申请号：US09599807

    申请日：2000-06-21

    申请人： Jizheng Xu ,  Shipeng Li ,  Zixiang Xiong ,  Ya-Qin Zhang

    发明人： Jizheng Xu ,  Shipeng Li ,  Zixiang Xiong ,  Ya-Qin Zhang

    IPC分类号： H04N712

    CPC分类号： H04N19/61 ,  H04N19/102 ,  H04N19/63

    摘要： A video coding system and method utilizes a 3-D wavelet transform that is memory efficient and reduces boundary effect across frame boundaries. The transform employs a lifting-based scheme and buffers wavelet coefficients at intermediate lifting steps towards the end of one GOP (group of pictures) until intermediate coefficients from the beginning of the next GOP are available. The wavelet transform scheme does not physically break the video sequence into GOPs, but processes the sequence without intermission. In this manner, the system simulates an infinite wavelet transformation across frame boundaries and the boundary effect is significantly reduced or essentially eliminated. Moreover, the buffering is very small and the scheme can be used to implement other decomposition structures. The wavelet transform scheme provides superb video playback quality with little or no boundary effects.

    摘要翻译： 视频编码系统和方法利用三维小波变换，其存储器有效并且减少跨边界的边界效应。 该变换采用基于提升的方案，并且在一个GOP（图像组）的结尾的中间提升步骤处缓冲小波系数，直到来自下一个GOP的开始的中间系数可用。 小波变换方案不会将视频序列物理地分解成GOP，而是在不间断的情况下处理序列。 以这种方式，系统模拟跨帧边界的无限小波变换，并且边界效应被显着减少或基本上消除。 此外，缓冲非常小，并且该方案可以用于实现其他分解结构。 小波变换方案提供极好的视频播放质量，很少或没有边界效应。

    Compress-forward coding with N-PSK modulation for the half-duplex Gaussian relay channel
    7.
    发明授权
    Compress-forward coding with N-PSK modulation for the half-duplex Gaussian relay channel 失效
    用于半双工高斯中继信道的具有N-PSK调制的压缩前向编码

    公开(公告)号：US07912147B2

    公开(公告)日：2011-03-22

    申请号：US11686019

    申请日：2007-03-14

    申请人： Zhixin Liu ,  Vladimir M. Stanković ,  Zixiang Xiong

    发明人： Zhixin Liu ,  Vladimir M. Stanković ,  Zixiang Xiong

    IPC分类号： H04L27/00

    CPC分类号： H04L27/183 ,  H03M7/30 ,  H03M13/1102 ,  H03M13/1197 ,  H03M13/3746 ,  H03M13/6306 ,  H03M13/6312 ,  H03M13/658 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0057 ,  H04L27/186 ,  H04L27/2053 ,  H04L2001/0097

    摘要： Systems and methods that implement compress-forward (CF) coding with N-PSK modulation for the relay channel are disclosed, where N is greater than or equal to two. In the CF scheme, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. Quantizer design and selection of channel code parameters are discussed. Low-density parity check (LDPC) codes are used for error protection at the source, and nested scalar quantization (NSQ) and irregular repeat accumulate (IRA) codes for Wyner Ziv coding (or more precisely, distributed joint source-channel coding) at the relay. The destination system decodes original message information using (a) a first signal received from the source in a first interval and (b) a second signal that represents a mixture of transmissions from the source and relay in the second interval.

    摘要翻译： 公开了通过用于中继信道的N-PSK调制实现压缩前向（CF）编码的系统和方法，其中N大于或等于2。 在CF方案中，Wyner-Ziv编码适用于继电器，以利用继电器和目的地之间的信号之间的联合统计。 讨论量化器设计和选择通道代码参数。 低密度奇偶校验（LDPC）码用于源处的错误保护，嵌套标量量化（NSQ）和不规则重复累加（IRA）码用于Wyner-Ziv编码（或更准确地说，分布式联合源信道编码） 在继电器。 目的地系统使用（a）在第一间隔中从源接收的第一信号和（b）表示在第二间隔中来自源和继电器的传输的混合的第二信号来解码原始消息信息。

    Multi-source data encoding, transmission and decoding using Slepian-Wolf codes based on channel code partitioning
    9.
    发明授权
    Multi-source data encoding, transmission and decoding using Slepian-Wolf codes based on channel code partitioning 有权
    使用基于通道码分割的Slepian-Wolf码进行多源数据编码，传输和解码

    公开(公告)号：US07653867B2

    公开(公告)日：2010-01-26

    申请号：US11086974

    申请日：2005-03-22

    申请人： Vladimir M. Stankovic ,  Angelos D. Liveris ,  Zixiang Xiong ,  Costas N. Georghiades

    发明人： Vladimir M. Stankovic ,  Angelos D. Liveris ,  Zixiang Xiong ,  Costas N. Georghiades

    IPC分类号： H03M13/00

    CPC分类号： H03M7/30 ,  H03M13/1102 ,  H03M13/1111 ,  H03M13/1194 ,  H03M13/2957 ,  H03M13/6312

    摘要： System and method for Slepian-Wolf coding using channel code partitioning. A generator matrix is partitioned to generate multiple sub-matrices corresponding respectively to multiple correlated data sources. The partitioning is in accordance with a rate allocation among the correlated data sources. Corresponding parity matrices may be generated respectively from the sub-matrices, where each parity matrix is useable to encode correlated data for a respective correlated data source, resulting in respective syndromes, e.g., in the form of binary vectors. A common receiver may receive the syndromes and expand them to a common length by inserting zeros appropriately. The expanded syndromes may be vector summed (e.g., modulo 2), and a single channel decoding applied to determine a closest codeword, portions of whose systematic part may be multiplied by respective submatrices of the generator matrix, which products may be added to the respective expanded syndromes to produce estimates of the source data.

    摘要翻译： 使用信道码分割的Slepian-Wolf编码的系统和方法。 生成矩阵被分割以产生分别对应于多个相关数据源的多个子矩阵。 分区符合相关数据源之间的速率分配。 可以从子矩阵分别生成相应的奇偶校验矩阵，其中每个奇偶校验矩阵可用于对相应的相关数据源编码相关数据，从而产生例如二进制向量形式的相应校正子。 常见的接收器可以通过适当地插入零来接收综合征并将它们扩展到公共长度。 扩展的综合征可以是向量相加（例如，模2），并且应用单个信道解码以确定最接近的码字，其系统部分的部分可以乘以生成矩阵的相应子矩阵，哪些产品可以被添加到相应的 扩大综合征，以产生源数据的估计。

    Data encoding and decoding using Slepian-Wolf coded nested quantization to achieve Wyner-Ziv coding
    10.
    发明授权
    Data encoding and decoding using Slepian-Wolf coded nested quantization to achieve Wyner-Ziv coding 有权
    数据编码和解码使用Slepian-Wolf编码嵌套量化来实现Wyner-Ziv编码

    公开(公告)号：US07602317B2

    公开(公告)日：2009-10-13

    申请号：US11868885

    申请日：2007-10-08

    申请人： Zhixin Liu ,  Samuel S. Cheng ,  Angelos D. Liveris ,  Zixiang Xiong

    发明人： Zhixin Liu ,  Samuel S. Cheng ,  Angelos D. Liveris ,  Zixiang Xiong

    IPC分类号： H03M7/34

    CPC分类号： H03M7/30

    摘要： A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) apply nested quantization to input data from an information source in order to generate intermediate data; and (b) encode the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by: (1) applying an asymmetric Slepian-Wolf decoder to compressed input data using side information to generate intermediate values, and (b) jointly decoding the intermediate values using the side information to generate decompressed output data.

    摘要翻译： 用于实现Wyner-Ziv编码器的系统和方法可以包括以下步骤：（a）将嵌套量化应用于从信息源输入数据以产生中间数据; 和（b）使用非对称Slepian-Wolf编码器对中间数据进行编码，以产生表示输入数据的压缩输出数据。 类似地，可以通过以下方式来实现Wyner-Ziv解码器：（1）使用侧信息对压缩输入数据应用非对称Slepian-Wolf解码器以产生中间值，以及（b）使用辅助信息共同解码中间值以产生解压缩 输出数据。