公开(公告)号：US08116375B2

公开(公告)日：2012-02-14

申请号：US10584762

申请日：2004-07-19

申请人： Wen Gao ,  Xiangyang Ji ,  Siwei Ma ,  Debin Zhao ,  Yan Lu

发明人： Wen Gao ,  Xiangyang Ji ,  Siwei Ma ,  Debin Zhao ,  Yan Lu

IPC分类号： H04N7/12

CPC分类号： H04N19/577 ,  H04N19/51 ,  H04N19/513 ,  H04N19/61

摘要： A method for obtaining an image reference block in a code mode of fixed reference frame number includes the steps of: performing motion estimation for each block of a current B frame and obtaining a motion vector MV of a corresponding block of a backward reference frame; discriminating whether the motion vector is beyond a maximum forward reference frame which is possibly pointed by the B frame, if not, then calculating the forward and backward motion vectors in a normal way; if yes, then using the motion vector of the forward reference frame that the B frame can obtain in the same direction to replace the motion vector of the corresponding block in the backward reference, and calculating the forward and the backward motion vectors of the B frame; finally, two image blocks pointed by the final obtained forward and backward motion vectors as the image reference blocks corresponding to the macro block. The present invention solves the possibly appeared problem of un-matching motion vectors, and can guarantee the coding efficiency to the largest extent.

摘要翻译： 用于以固定参考帧号码的码模式获得图像参考块的方法包括以下步骤：对当前B帧的每个块执行运动估计，并获得后向参考帧的对应块的运动矢量MV; 鉴别运动矢量是否超出可能由B帧指向的最大前向参考帧，如果不是，则以正常方式计算前向和后向运动矢量; 如果是，则使用B帧可以在相同方向上获得的前向参考帧的运动矢量来替换后向参考中的相应块的运动矢量，并且计算B帧的前向和后向运动矢量 ; 最后，由最终获得的前向和后向运动矢量指向的两个图像块作为与宏块对应的图像参考块。 本发明解决了可能出现的不匹配运动矢量的问题，可以最大限度地保证编码效率。

公开(公告)号：US20110317750A1

公开(公告)日：2011-12-29

申请号：US13138585

申请日：2010-03-12

申请人： Hou-Shin Chen ,  Wen Gao

发明人： Hou-Shin Chen ,  Wen Gao

IPC分类号： H04B17/00

CPC分类号： H04L27/0006 ,  H04L5/0007

摘要： Methods and apparatuses for OFDM spectrum sensing are provided. The proposed spectrum sensing algorithms are based on Time-Domain Symbol Cross-Correlation (TDSC-MRC and TDSC-NP methods) and can be applied to all existing wireless OFDM systems. The statistical behaviors of the TDSC-based spectrum sensors are explicitly analyzed. In addition, the spectrum sensing method employing the Cyclic Prefix of the OFDM modulated signals (CP method) is described for comparison purposes. The DVB-T Standard is adopted as an application example to illustrate the proposed spectrum sensing algorithms. Simulation results show that the TDSC-MRC method outperforms the CP method for all values of CP ratio considered. The TDSC methods have the advantage that the detection performances are the same for different CP ratios, while the detection performance of the CP method degrades dramatically when the CP ratio becomes small.

摘要翻译： 提供了OFDM频谱感测的方法和装置。 所提出的频谱感知算法基于时域符号交叉相关（TDSC-MRC和TDSC-NP方法），并且可以应用于所有现有的无线OFDM系统。 明确分析了基于TDSC的频谱传感器的统计特性。 另外，为了进行比较，描述了使用OFDM调制信号的循环前缀的频谱感测方法（CP方法）。 采用DVB-T标准作为应用示例来说明所提出的频谱感知算法。 模拟结果表明，考虑到所有CP比值，TDSC-MRC方法优于CP方法。 TDSC方法的优点在于，对于不同的CP比，检测性能相同，而当CP比变小时，CP方法的检测性能显着降低。

公开(公告)号：US20110268015A1

公开(公告)日：2011-11-03

申请号：US13138043

申请日：2009-12-09

申请人： Jun Xiao ,  Wen Gao

发明人： Jun Xiao ,  Wen Gao

IPC分类号： H04B7/14 ,  H04W72/04

CPC分类号： H04B1/3822

摘要： A near-optimal resource allocation method is provided for a Multiple-Input Multiple-Output (MIMO) relay scheme in which the source and relay nodes have only partial channel state information (CSI), obtained through finite rate feedback, and the powers of the source and relay nodes are constrained. Power on/off beamforming is employed at the source and relay nodes in which the receiving node feeds back the index of a beamforming matrix selected in accordance with the channel state. Using channel statistical information, the exemplary method allocates time between the first stage and the second stage of the relay transmission, and power between the source and the relay node. With only limited CSI feedback, the resource allocation method enjoys a considerable performance advantage over arrangements with no feedback.

摘要翻译： 为多输入多输出（MIMO）中继方案提供了一种近乎最佳的资源分配方法，其中源和中继节点仅具有通过有限速率反馈获得的部分信道状态信息（CSI），以及 源节点和中继节点受到限制。 在源和中继节点采用电源开/关波束形成，其中接收节点反馈根据信道状态选择的波束形成矩阵的索引。 使用信道统计信息，该示例性方法在中继传输的第一级和第二级之间分配时间，以及源和中继节点之间的功率。 只有有限的CSI反馈，资源分配方法在没有反馈的安排方面具有相当的性能优势。

公开(公告)号：US08005144B2

公开(公告)日：2011-08-23

申请号：US10571659

申请日：2004-07-02

申请人： Xiangyang Ji ,  Wen Gao ,  Debin Zhao ,  Yan Lu ,  Siwei Ma ,  Honggang Qi

发明人： Xiangyang Ji ,  Wen Gao ,  Debin Zhao ,  Yan Lu ,  Siwei Ma ,  Honggang Qi

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/577 ,  H04N19/513 ,  H04N19/58 ,  H04N19/61

摘要： The invention discloses a bi-directional prediction method for video coding/decoding. When bi-directional prediction coding at the coding end, firstly the given forward candidate motion vector of the current image block is obtained for every image block of the current B-frame; the backward candidate motion vector is obtained through calculation, and the candidate bi-directional prediction reference block is obtained through bi-directional prediction method; the match is computed within the given searching scope and/or the given matching threshold; finally the optimal matching block is selected to determine the final forward motion vector, and the backward motion vector and the block residual. The present invention achieves the object of bi-directional prediction by coding a single motion vector, furthermore, it will not enhance the complexity of searching for a matching block at the coding end, and may save amount of coding the motion vector and represent the motion of the objects in video more actually. The present invention realizes a new prediction coding type by combining the forward prediction coding with the backward.

摘要翻译： 本发明公开了一种用于视频编码/解码的双向预测方法。 在编码结束的双向预测编码时，首先为当前B帧的每个图像块获得当前图像块的给定正向候选运动矢量; 通过计算获得后向候选运动矢量，通过双向预测方法获得候选双向预测参考块; 在给定的搜索范围和/或给定的匹配阈值内计算匹配; 最后选择最优匹配块来确定最终的前向运动矢量，反向运动矢量和块残差。 本发明通过对单个运动矢量进行编码来实现双向预测的目的，此外，它不会增强在编码端搜索匹配块的复杂度，并且可以节省编码运动矢量的量并表示运动 视频中的对象更实际。 本发明通过将前向预测编码与后向组合来实现新的预测编码类型。

公开(公告)号：US20110182345A1

公开(公告)日：2011-07-28

申请号：US12998270

申请日：2009-10-02

申请人： Jing Lei ,  Wen Gao

发明人： Jing Lei ,  Wen Gao

IPC分类号： H04B17/00

CPC分类号： H03M13/251 ,  H03M13/11 ,  H03M13/1165 ,  H03M13/255 ,  H03M13/2757 ,  H03M13/356 ,  H04L1/0071 ,  H04L27/36

摘要： The present invention relates to code-dependent bit interleavers for parallel non-uniform channels. Since the channel dependence of a given code ensemble is dominated by the mutual information between the channel input and output, the present invention proposes to simplify the analysis about the decoding behavior by using a set of surrogate binary erasure channels. The approximation of the actual channel by the surrogate BEC is established on the equivalence of bitwise capacities, which represent the mutual information between the uniformly-distributed binary input and the likelihood ratios of the effective parallel AWGN channels. Moreover, the transition of the erasure probabilities is modeled by a linear difference equation around the decoding threshold SNR, from which we can derive a necessary condition on the convergence of decoding iterations and achieve a useful guideline for the configuration of the bit interleaver.

摘要翻译： 本发明涉及用于并行非均匀信道的代码相关比特交织器。 由于给定代码集合的信道依赖性由信道输入和输出之间的相互信息支配，本发明提出通过使用一组替代二进制擦除信道来简化关于解码行为的分析。 代数BEC的实际信道的近似是基于位容量的等价性来确定的，这表示均匀分布的二进制输入与有效并行AWGN信道的似然比之间的相互信息。 此外，擦除概率的转换由围绕解码阈值SNR的线性差分方程建模，从中可以得出解码迭代收敛的必要条件，并为比特交织器的配置实现有用的指导。

公开(公告)号：US20110170606A1

公开(公告)日：2011-07-14

申请号：US13119757

申请日：2008-12-19

申请人： Kai Zhang ,  Li Zhang ,  Siwei Ma ,  Wen Gao ,  Shaw-Min Lei

发明人： Kai Zhang ,  Li Zhang ,  Siwei Ma ,  Wen Gao ,  Shaw-Min Lei

IPC分类号： H04N7/26 ,  H04N7/50

CPC分类号： H04N19/51 ,  H04N19/593

摘要： A video processing apparatus with residue prediction includes a motion estimation/compensation unit to determine a matching block of a reference video frame, obtain a motion vector of a current block of a current video frame that is related to the matching block, and acquire neighboring reconstructed pixels adjacent to the current block and corresponding pixels adjacent to the matching block with the motion vector alignment. Additionally, a pseudo-residue generating unit is included and constructs pseudo residues according to the neighboring reconstructed pixels and the corresponding pixels, an arithmetic unit is included and generates first-order residues by subtracting the matching block from the current block, and a residue-predicting unit is included and derives second-order residues and corresponding information according to the pseudo residues and the first-order residues. Moreover, a post-processing unit is included and derives a reconstructed current block according to the second-order residues and its corresponding information.

摘要翻译： 具有残差预测的视频处理装置包括运动估计/补偿单元，用于确定参考视频帧的匹配块，获得与匹配块相关的当前视频帧的当前块的运动矢量，并且获取邻近重构的 与当前块相邻的像素和与匹配块相邻的对应像素与运动矢量对准。 另外，包括伪残差生成单元，根据相邻的重构像素和对应的像素构成伪残差，包括算术单位，并通过从当前块中减去匹配块来生成一阶残差， 包含预测单元，并根据伪残差和一阶残差导出二阶残差和相应信息。 此外，包括后处理单元，并根据二阶残差及其对应信息导出重构的当前块。

公开(公告)号：US20110141991A1

公开(公告)日：2011-06-16

申请号：US13023927

申请日：2011-02-09

申请人： Wen Gao

发明人： Wen Gao

IPC分类号： H04W72/04

CPC分类号： H04L1/1887 ,  H04L1/1812 ,  H04L1/1896 ,  H04W76/10

摘要： An uplink transmission method includes acquiring, by a user equipment, a maximum number of hybrid automatic repeat request transmission (M-Tmax). The M-Tmax is an integral multiple of a transmission time interval bundle size. The user equipment performs uplink transmission according to the M-Tmax after a TTI bundle activation time.

摘要翻译： 上行链路传输方法包括由用户设备获取最大数量的混合自动重传请求传输（M-Tmax）。 M-Tmax是传输时间间隔束大小的整数倍。 在TTI束激活时间之后，用户设备根据M-Tmax执行上行链路传输。

公开(公告)号：US07949074B2

公开(公告)日：2011-05-24

申请号：US10555617

申请日：2004-04-24

申请人： Wen Gao ,  Joshua Lawrence Koslov

发明人： Wen Gao ,  Joshua Lawrence Koslov

IPC分类号： H04L27/06

CPC分类号： H04L27/3466

摘要： A satellite receiver receives a hierarchical modulation based received signal, which has at least an upper layer (UL) and a lower layer (LL), and simultaneously recovers therefrom data conveyed in the UL signal and data conveyed in the LL signal.

摘要翻译： 卫星接收机接收具有至少上层（UL）和下层（LL）的基于层次调制的接收信号，并且同时从UL信号中传送的数据和在LL信号中传送的数据中恢复。

公开(公告)号：US07916783B2

公开(公告)日：2011-03-29

申请号：US10521877

申请日：2002-09-23

申请人： Wen Gao ,  Siwei Ma ,  Yan Lu

发明人： Wen Gao ,  Siwei Ma ,  Yan Lu

IPC分类号： H04N11/02

CPC分类号： H04N19/567 ,  H04N19/107 ,  H04N19/124 ,  H04N19/14 ,  H04N19/147 ,  H04N19/15 ,  H04N19/152 ,  H04N19/172 ,  H04N19/176 ,  H04N19/19 ,  H04N19/194 ,  H04N19/61

摘要： In the invention, a rate distortion optimization (RDO) based rate control scheme is comprised of following two steps: first, does bit allocation for every frame in a GOP, and based on the allocated bits, a predicted quantization parameter is used to do the first rate distortion optimization mode selection for every macroblock in the current frame; second, the information of the current macroblock collected from the first rate distortion mode selection is used to calculate a final quantization parameter for rate control, and if the final quantization parameter is different from the predicted one, a second rate distortion mode selection will be executed again. A rate distortion optimization based rate control implementation includes following modules: a video coding encoder module (for example, H.264/JVT processing module), rate distortion optimization based macroblock mode selection and adaptive quantization module, virtual buffer, and global complexity estimation module. As RDO and rate control are considered together in the invention, the RDO based rate control scheme can achieve better coding performance while with accurate target bitrate control.

摘要翻译： 在本发明中，基于速率失真优化（RDO）的速率控制方案包括以下两个步骤：首先，对GOP中的每一帧进行比特分配，并且基于所分配的比特，使用预测的量化参数来执行 对当前帧中的每个宏块进行一次失真优化模式选择; 第二，使用从第一速率失真模式选择收集的当前宏块的信息来计算用于速率控制的最终量化参数，并且如果最终量化参数与预测的量化参数不同，则将执行第二速率失真模式选择 再次。 基于速率失真优化的速率控制实现包括以下模块：视频编码编码器模块（例如，H.264 / JVT处理模块），基于速率失真优化的宏块模式选择和自适应量化模块，虚拟缓冲器和全局复杂度估计模块 。 由于在本发明中一起考虑了RDO和速率控制，所以基于RDO的速率控制方案可以在精确的目标比特率控制的情况下实现更好的编码性能。

公开(公告)号：US07853242B2

公开(公告)日：2010-12-14

申请号：US11015007

申请日：2004-12-20

申请人： Allan David Lewis ,  George Dos Santos ,  Russell N. Owen ,  Wen Gao ,  Philip C. Luk ,  David A. Bajar ,  David P. Yach

发明人： Allan David Lewis ,  George Dos Santos ,  Russell N. Owen ,  Wen Gao ,  Philip C. Luk ,  David A. Bajar ,  David P. Yach

IPC分类号： H04M1/66 ,  H04W36/00

CPC分类号： H04W12/06 ,  H04W88/06

摘要： A bypass server is placed in an outgoing link between a mobile device server and a relay used to distribute data from the mobile device server to remote mobile devices to which the data is addressed. Where a direct connection is established between a suitably configured network node (such as a personal computer) and a given mobile device, the bypass server may form a local connection with the network node and divert along the local connection those packets that are addressed to the given mobile device. As such, a lower cost/higher bandwidth local communication path between the given mobile device and the mobile device server may be established, when compared to the conventional remote communication path. The local communication path may be especially useful for bulk data transfers.

摘要翻译： 旁路服务器被放置在移动设备服务器和用于将数据从移动设备服务器分发到数据所寻址的远程移动设备的中继器之间的输出链路中。 在适当配置的网络节点（例如个人计算机）和给定的移动设备之间建立直接连接的情况下，旁路服务器可以与网络节点形成本地连接，并沿着本地连接转发那些寻址到 给予移动设备。 因此，与传统的远程通信路径相比，可以建立给定移动设备和移动设备服务器之间的较低成本/更高带宽的本地通信路径。 本地通信路径对于批量数据传输可能特别有用。