专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

US08218633B2 Bidirectionally decodable Wyner-Ziv video coding 有权
标题翻译：双向解码Wyner-Ziv视频编码
公开(公告)号：US08218633B2
公开(公告)日：2012-07-10
申请号：US12141152
申请日：2008-06-18
申请人： Oscar Chi Lim Au , Xiaopeng Fan
发明人： Oscar Chi Lim Au , Xiaopeng Fan
IPC分类号： H04B1/66
CPC分类号： H04N19/395 , H04N19/19 , H04N19/194 , H04N19/46 , H04N19/573 , H04N19/89
摘要： Systems and methodologies for employing bidirectionally decodable Wyner-Ziv video coding (BDWZVC) are described herein. BDWZVC can be used to generate M-frames, which have multiple reference frames at an encoder and can be forward and backward decodable. For example, optimal Lagrangian multipliers for forward and backward motion estimation can be derived and/or utilized. The optimal Lagrangian multiplier for backward motion estimation can be approximately twice as large as the optimal Lagrangian multiplier for forward motion estimation. Further, an optimal P-frame/M-frame selection scheme can be employed to enhance rate-distortion performance when video is transmitted over an error prone channel. Accordingly, a first frame in a group of pictures (GOP) can be encoded as an I-frame, a next m−1 frames can be encoded as P-frames, and a remaining n−m frames can be encoded as M-frames, where n can be a length of the GOP and m can be optimally identified.
摘要翻译：本文描述了使用双向可解码Wyner-Ziv视频编码（BDWZVC）的系统和方法。 BDWZVC可用于生成M帧，它们在编码器处具有多个参考帧，可以进行前向和后向解码。例如，可以导出和/或利用用于前向和后向运动估计的最优拉格朗日乘数。用于向后运动估计的最佳拉格朗日乘数可以是用于向前运动估计的最佳拉格朗日乘数的大约两倍。此外，当视频通过易错信道传输时，可以采用最佳P帧/ M帧选择方案来提高速率失真性能。因此，一组图像（GOP）中的第一帧可以被编码为I帧，下一个m-1帧可以被编码为P帧，并且剩余的n-m帧可以被编码为M帧，其中n可以是GOP的长度，并且m可以被最佳地识别。

52. 发明申请

US20110013803A1 METHOD AND APPARATUS FOR HIDING DATA FOR HALFTONE IMAGES 有权
标题翻译：用于隐藏HALFTONE图像数据的方法和装置
公开(公告)号：US20110013803A1
公开(公告)日：2011-01-20
申请号：US12889220
申请日：2010-09-23
申请人： Oscar Chi-Lim AU , Ming Sun Fu
发明人： Oscar Chi-Lim AU , Ming Sun Fu
IPC分类号： G06K9/40 , G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0081 , G06T2201/0083 , H04N1/32203 , H04N1/32245 , H04N1/32256 , H04N1/4052 , H04N2201/3233 , H04N2201/327
摘要： We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.
摘要翻译：我们提出了生成半色调图像的方法，其中每个像素采用两个色调值之一。生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。在第一种情况下，通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素，将数据隐藏在现有的半色调图像内。在第二种情况下，从灰度图像生成半色调图像，并且在该转换处理期间数据被隐藏。

53. 发明授权

US07868788B2 System and method for encoding data based on a compression technique with security features 有权
标题翻译：基于具有安全特征的压缩技术对数据进行编码的系统和方法
公开(公告)号：US07868788B2
公开(公告)日：2011-01-11
申请号：US12486537
申请日：2009-06-17
申请人： Oscar Chi Lim Au , Jiantao Zhou
发明人： Oscar Chi Lim Au , Jiantao Zhou
IPC分类号： H03M7/30
CPC分类号： H03M7/3088 , H04L9/002 , H04L9/065 , H04L2209/08 , H04L2209/24 , H04L2209/30
摘要： Described herein is an efficient encryption method and system having improved security features based on randomness. The method and system utilize a random dictionary insertion and a random dictionary permutation, and a key stream generated by a stream cipher. Security analysis results show that the method and system provides a higher level of security without incurring any coding efficiency loss, compared with a existing encoding methods.
摘要翻译：这里描述了一种基于随机性的改进的安全特征的有效的加密方法和系统。该方法和系统利用随机字典插入和随机字典排列，以及由流密码生成的密钥流。安全分析结果表明，与现有的编码方法相比，该方法和系统提供了更高的安全级别，而不会导致任何编码效率损失。

54. 发明授权

US07804977B2 Methods and apparatus for hiding data in halftone images 有权
标题翻译：在半色调图像中隐藏数据的方法和装置
公开(公告)号：US07804977B2
公开(公告)日：2010-09-28
申请号：US11508410
申请日：2006-08-22
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0081 , G06T2201/0083 , H04N1/32203 , H04N1/32245 , H04N1/32256 , H04N1/4052 , H04N2201/3233 , H04N2201/327
摘要： We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighboring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.
摘要翻译：我们提出了生成半色调图像的方法，其中每个像素采用两个色调值之一。生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。在第一种情况下，通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素，将数据隐藏在现有的半色调图像内。在第二种情况下，从灰度图像生成半色调图像，并且在该转换处理期间数据被隐藏。

55. 发明申请

US20090317017A1 IMAGE CHARACTERISTIC ORIENTED TONE MAPPING FOR HIGH DYNAMIC RANGE IMAGES 审中-公开
标题翻译：用于高动态范围图像的图像特征定向色调映射
公开(公告)号：US20090317017A1
公开(公告)日：2009-12-24
申请号：US12142946
申请日：2008-06-20
申请人： Oscar Chi Lim Au , Chun Hung Liu
发明人： Oscar Chi Lim Au , Chun Hung Liu
IPC分类号： G06K9/40
CPC分类号： G02B3/005 , G06T5/008 , G06T5/40 , G06T2207/20208
摘要： A method and system map high dynamic range images to low dynamic range images. An input set of luminance values can be divided into separate regions corresponding to particular luminance value ranges. A region value can be determined for each region. Based at least in part on the region value, a quantity of range assigned to each region for tone mapping can be dynamically adjusted until each region meets a decision criterion or stopping condition, referred to herein as “concentration.” A region can be said to be concentrated if all luminance values therein are within a concentration interval or range. After a region is concentrated, it can be tone-mapped by quantization.
摘要翻译：一种方法和系统将高动态范围图像映射到低动态范围图像。亮度值的输入集合可以被划分为对应于特定亮度值范围的单独区域。可以为每个区域确定区域值。至少部分地基于区域值，可以动态地调整分配给每个区域用于色调映射的范围的数量，直到每个区域满足决策标准或停止条件，这里称为“浓度”。如果其中的所有亮度值都在浓度间隔或范围内，则区域可以说是集中的。在区域集中后，可以通过量化进行色调映射。

56. 发明申请

US20090309769A1 System and method for encoding data based on a compression technique with security features 有权
标题翻译：基于具有安全特征的压缩技术对数据进行编码的系统和方法
公开(公告)号：US20090309769A1
公开(公告)日：2009-12-17
申请号：US12486537
申请日：2009-06-17
申请人： Oscar Chi Lim Au , Jiantao Zhou
发明人： Oscar Chi Lim Au , Jiantao Zhou
IPC分类号： H03M7/34
CPC分类号： H03M7/3088 , H04L9/002 , H04L9/065 , H04L2209/08 , H04L2209/24 , H04L2209/30
摘要： Described herein is an efficient encryption method and system having improved security features based on randomness. The method and system utilize a random dictionary insertion and a random dictionary permutation, and a key stream generated by a stream cipher. Security analysis results show that the method and system provides a higher level of security without incurring any coding efficiency loss, compared with a existing encoding methods.
摘要翻译：这里描述了一种基于随机性的改进的安全特征的有效的加密方法和系统。该方法和系统利用随机字典插入和随机字典排列，以及由流密码生成的密钥流。安全分析结果表明，与现有的编码方法相比，该方法和系统提供了更高的安全级别，而不会导致任何编码效率损失。

57. 发明申请

US20090304264A1 FREE VIEW GENERATION IN RAY-SPACE 有权
标题翻译： RAY-SPACE中的自由视图生成
公开(公告)号：US20090304264A1
公开(公告)日：2009-12-10
申请号：US12133617
申请日：2008-06-05
申请人： Oscar Chi Lim Au , Ling Hou
发明人： Oscar Chi Lim Au , Ling Hou
IPC分类号： G06K9/00
CPC分类号： G06T7/557
摘要： The claimed subject matter relates to an architecture that can facilitate more efficient free view generation in Ray-Space by way of a Radon transform. The architecture can render virtual views based upon original image data by employing Ray-Space interpolation techniques. In particular, the architecture can apply the Radon transform to a feature epipolar plane image (FEPI) to extract more suitable slope or direction candidates. In addition, the architecture can facilitate improved block-based matching techniques in order to determine an optimal linear interpretation direction.
摘要翻译：所要求保护的主题涉及可以通过Radon变换促进Ray-Space中更有效的自由视图生成的架构。该架构可以通过采用Ray-Space插值技术来基于原始图像数据呈现虚拟视图。特别地，架构可以将Radon变换应用于特征对极平面图像（FEPI）以提取更合适的斜率或方向候选。另外，该架构可以促进改进的基于块的匹配技术，以便确定最佳的线性解释方向。

58. 发明申请

US20090295607A1 FINDING A VARIABLE LENGTH CODE WITH OPTIMAL ERROR RECOVERY 审中-公开
标题翻译：找到一个可变的长度代码与最佳错误恢复
公开(公告)号：US20090295607A1
公开(公告)日：2009-12-03
申请号：US12131179
申请日：2008-06-02
申请人： Oscar Chi Lim Au , Jiantao Zhou
发明人： Oscar Chi Lim Au , Jiantao Zhou
IPC分类号： H03M7/40
CPC分类号： H03M13/00 , H03M13/015
摘要： Systems and methodologies for analyzing error recovery performance of variable length codes utilized for encoding and decoding data are provided herein. Synchronization recovery of a set of variable length codes can be evaluated assuming that an encoded bit stream is transmitted over a binary symmetric channel. Further, mean symbol error rates corresponding to each of the variable length codes in the set can be determined based upon the evaluation of the synchronization recovery. Moreover, a subset of the variable length codes with optimal error recovery can be selected as a function of the mean symbol error rates.
摘要翻译：本文提供了用于分析用于编码和解码数据的可变长度代码的错误恢复性能的系统和方法。假设通过二进制对称信道传输编码比特流，可以评估一组可变长度码的同步恢复。此外，可以基于同步恢复的评估来确定与集合中的每个可变长度代码相对应的平均符号错误率。此外，可以选择具有最佳错误恢复的可变长度代码的子集作为平均符号错误率的函数。

59. 发明申请

US20090147849A1 INTRA FRAME ENCODING USING PROGRAMMABLE GRAPHICS HARDWARE 审中-公开
标题翻译：使用可编程图形硬件的内部框架编码
公开(公告)号：US20090147849A1
公开(公告)日：2009-06-11
申请号：US12234721
申请日：2008-09-22
申请人： Oscar Chi Lim Au , Man Cheung Kung
发明人： Oscar Chi Lim Au , Man Cheung Kung
IPC分类号： H04N11/04
CPC分类号： H04N19/436 , H04N19/11 , H04N19/159 , H04N19/176 , H04N19/593 , H04N19/61
摘要： GPU-based intra frame processing techniques are provided to selectively offload computation loading from a CPU to a GPU. By rearranging the 4×4 block encoding order, the process can benefit from a parallel processing mechanism available on the GPU. Block list size has an effect on speed and by using the optimal block list size for a selection, up to about two times speed improvement in intra frame processing can be achieved.
摘要翻译：提供基于GPU的帧内处理技术来选择性地将计算加载从CPU卸载到GPU。通过重新排列4x4块编码顺序，该过程可以受益于GPU上可用的并行处理机制。块列表大小对速度有影响，并且通过使用最佳块列表大小进行选择，可以实现高达约两倍的帧内处理速度改善。

60. 发明申请

US20090074075A1 EFFICIENT REAL-TIME RATE CONTROL FOR VIDEO COMPRESSION PROCESSES 审中-公开
标题翻译：视频压缩过程的高效实时速率控制
公开(公告)号：US20090074075A1
公开(公告)日：2009-03-19
申请号：US11855841
申请日：2007-09-14
申请人： Oscar Chi Lim Au , Dicky Chi Wah Wong
发明人： Oscar Chi Lim Au , Dicky Chi Wah Wong
IPC分类号： H04N7/12
CPC分类号： H04N19/142 , H04N19/124 , H04N19/149 , H04N19/176
摘要： In advanced video coding standards such as H.264, macro-blocks belong to more advanced MB types, such as skipped and non-skipped macro-blocks. In non-skipped macro-blocks, the encoder determines whether each of 8×8 luminance sub-blocks and 4×4 chrominance sub-block of a macro-block is to be encoded, giving the different number of sub-blocks at each macro-block encoding times. It has been found that the correlation of bits between consecutive frames is high. This correlation is even higher after macro-block normalization by considering advanced macro-block types. Based on this bit characteristic, a fast real-time H.264 rate control scheme is herein described. The empirical example results suggest that this scheme can achieve PSNR gain over JM10.2.
摘要翻译：在诸如H.264的高级视频编码标准中，宏块属于更高级的MB类型，例如跳过和非跳过的宏块。在非跳过的宏块中，编码器确定宏块的8×8亮度子块和4×4色度子块中的每一个是否被编码，在每个宏块编码次数给出不同数量的子块。已经发现，连续帧之间的比特的相关性很高。通过考虑高级宏块类型，宏块归一化后，这种相关性更高。基于该比特特性，本文描述了快速实时H.264速率控制方案。实证结果表明，该方案可以实现超过JM10.2的PSNR增益。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式