Memory efficient 3-D wavelet transform for video coding without boundary effects
    1.
    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

    IPC分类号: H04N712

    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。

    Memory efficient 3-D wavelet transform for video coding without boundary effects
    2.
    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:US07949049B2

    公开(公告)日:2011-05-24

    申请号:US10897273

    申请日:2004-08-06

    IPC分类号: H04N11/02 H04N7/12

    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。

    Apparatus and method for quadtree based variable block size motion
estimation
    3.
    发明授权
    Apparatus and method for quadtree based variable block size motion estimation 失效
    用于基于四叉树的可变块大小运动估计的装置和方法

    公开(公告)号:US6084908A

    公开(公告)日:2000-07-04

    申请号:US735869

    申请日:1996-10-23

    摘要: A method and apparatus for determining an optimal quadtree structure for quadtree-based variable block size (VBS) motion estimation. The method computes the motion vectors for the entire quadtree from the largest block-size to the smallest block-size. Next, the method may optionally select an optimal quantizer scale for each block. The method then compares from "bottom-up" the sum of the distortion from encoding all sub-blocks or sub-nodes (children) as compared to the distortion from encoding the block or node (parent) from which the subnodes are partitioned from. If the sum of the distortion from encoding the children is greater than that of the parent then the node is "merged". Conversely, if the sum of the distortion from encoding the children is less than that of the parent then the node is "split" and the Lagrangian cost for the parent node is set as the sum of the Lagrangian cost of its children. This step is repeated for the all nodes through every level until an optimal quadtree structure is obtained.

    摘要翻译: 一种用于确定用于基于四叉树的可变块大小(VBS)运动估计的最佳四叉树结构的方法和装置。 该方法从最大块大小到最小块大小计算整个四叉树的运动矢量。 接下来,该方法可以可选地为每个块选择最佳量化器标度。 然后,该方法从与所编码的所有子块或子节点(子节点)中的失真和的总和相比,从编码从子节点被分割的块或节点(父节点)的失真相比较“自下而上”。 如果来自编码孩子的失真的总和大于父节点的失真的总和,则节点被“合并”。 相反,如果来自编码孩子的失真的总和小于父母的失真之和,则节点“分裂”,并且父节点的拉格朗日代价被设置为其孩子的拉格朗日代价的总和。 通过每个级别对所有节点重复此步骤,直到获得最佳四叉树结构。

    Wyner-Ziv coding based on TCQ and LDPC codes
    5.
    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

    IPC分类号: H03M7/00

    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
    8.
    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

    IPC分类号: H03M13/00 G06F11/00

    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
    9.
    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

    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。

    Compress-forward coding with N-PSK modulation for the half-duplex Gaussian relay channel
    10.
    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

    IPC分类号: H04L27/00

    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。