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1. 发明授权

US07113543B2 Video encoding 有权
标题翻译：视频编码
公开(公告)号：US07113543B2
公开(公告)日：2006-09-26
申请号：US10356910
申请日：2003-02-03
申请人： Ngai-Man Cheung , Yuji Itoh
发明人： Ngai-Man Cheung , Yuji Itoh
IPC分类号： H04B1/66
CPC分类号： H04N19/557 , H04N19/112 , H04N19/56
摘要： Motion compensation as for video compression with motion estimation with either frame mode or field mode by initial prediction of motion mode and when prediction error is small enough truncate motion estimation search.
摘要翻译：通过运动模式的初始预测以及预测误差足够小的运动估计搜索，可以通过帧模式或场模式进行运动估计的运动补偿。

2. 发明授权

US07155472B2 Fixed-point quantizer for video coding 有权
标题翻译：用于视频编码的定点量化器
公开(公告)号：US07155472B2
公开(公告)日：2006-12-26
申请号：US10364636
申请日：2003-02-11
申请人： Ngai-Man Cheung , Ho-Cheon Wey , Yuji Itoh
发明人： Ngai-Man Cheung , Ho-Cheon Wey , Yuji Itoh
IPC分类号： G06F7/38
CPC分类号： G06F7/535 , G06F7/49947 , G06F2207/5356 , G06T9/005
摘要： A quantizer employs a scaled integral inverse ratio division for quantization of an input T by a quantization step Q. The quantizer forms an integral approximation q of 2r/Q by either trunc(2r/Q) or round(2r/Q). A multiplier multiplies the absolute value of T by the q. An adjustment factor is added alternatively to the absolute value of T prior to multiplication or to the product after multiplication. This adjustment factor minimizes errors near transition points in the quantization. This invention is applicable to both trunc(T/Q) and round(T/Q).
摘要翻译：量化器采用缩放的积分逆比除法，用于通过量化步长Q对输入T进行量化。量化器通过trunc（2＆lt; r＆lt; / SUP> / Q）或圆（2 / Q）。乘数将T的绝对值乘以q。调整因子与乘法前的T的绝对值或乘法后的乘积相加。该调整因子使量化中的转变点附近的误差最小化。本发明适用于trunc（T / Q）和round（T / Q）。

3. 发明授权

US07720151B2 Motion estimation using early decision for goodness of estimation with quick convergence feedback 有权
标题翻译：运动估计使用早期的决策优先估计与快速收敛反馈
公开(公告)号：US07720151B2
公开(公告)日：2010-05-18
申请号：US10364094
申请日：2003-02-11
申请人： Yuji Itoh , Ho-Cheon Wey , Ngai-Man Cheung
发明人： Yuji Itoh , Ho-Cheon Wey , Ngai-Man Cheung
IPC分类号： H04N7/12
CPC分类号： H04N19/557 , H04N5/145
摘要： This invention is a method for speeding up block matching based motion estimation for video encoder. The invention 1) calculates statistics for a candidate motion vector for a predetermined fraction of the pixels of a macroblock, 2) makes an early decision based on this preliminary cost function, and 3) terminates the block matching process without calculating the cost function for other pixels if the preliminary cost function is not less than a predetermined threshold. This early decision for goodness estimation provides an economy of processing load when a large portion of data is left untouched (i.e. unprocessed). The present invention employs feedback control to reduce the predetermined threshold for quick convergence upon each detection of a better match.
摘要翻译：本发明是用于加速视频编码器的基于块匹配的运动估计的方法。本发明1）计算宏块像素的预定分数的候选运动矢量的统计量，2）基于该初步成本函数进行早期决定，3）终止块匹配处理而不计算其他的成本函数如果初步成本函数不小于预定阈值，则为像素。这种对善良估计的早期决定提供了当大部分数据保持不变（即未处理）时处理负载的经济性。本发明采用反馈控制来减少每次检测更好匹配时快速收敛的预定阈值。

4. 发明授权

US07154557B2 Joint pre-/post-processing approach for chrominance mis-alignment 有权
标题翻译：用于色度不对齐的联合预处理/后处理方法
公开(公告)号：US07154557B2
公开(公告)日：2006-12-26
申请号：US10364095
申请日：2003-02-11
申请人： Yuji Itoh , Ngai-Man Cheung
发明人： Yuji Itoh , Ngai-Man Cheung
IPC分类号： H04N11/02
CPC分类号： H04N9/77 , H04N9/646
摘要： This invention corrects chrominance misalignment that occurs during chrominance down-sampling and up-sampling. The invention extracts a binary index from the corresponding luminance signal. The binary index enables generation of a filter window. On down-sampling the filter window is applied to a block of source chrominance pixels which are filtered or not based upon the binary index. On up-sampling the binary index of the filter window for the target chrominance pixels determines which are filtered or not.
摘要翻译：本发明校正在色度下采样和上采样期间发生的色度失准。本发明从对应的亮度信号中提取二进制索引。二进制索引可以生成一个过滤器窗口。滤波器窗口的下采样被应用于基于二进制索引而被滤波的源色度像素块。对于对目标色度像素的滤波器窗口的二进制索引进行上采样确定哪些被过滤或不被滤波。

5. 发明授权

US07158684B2 Entropy coding scheme for video coding 有权
标题翻译：视频编码的熵编码方案
公开(公告)号：US07158684B2
公开(公告)日：2007-01-02
申请号：US10364104
申请日：2003-02-11
申请人： Ngai-Man Cheung , Yuji Itoh
发明人： Ngai-Man Cheung , Yuji Itoh
IPC分类号： G06K9/36
CPC分类号： H04N19/136 , H04N19/13 , H04N19/139 , H04N19/172 , H04N19/61
摘要： A method of variable length coding classifies each received symbol into one of a plurality of classifications having a corresponding variable length code table selected based upon a probability distribution of received symbols within the classification. The variable length codeword output corresponds to the received symbol according to the variable length code table corresponding to the classification of that received symbol. The plurality of classifications and the corresponding variable length code tables may be predetermined and fixed. Alternatively, the variable length code table may be dynamically determined with data transmitted from encoder to decoder specifying the variable length code tables and their configurations. Universal variable length code (UVLC) is used to code the symbols. Universal variable length code can instantiate to different variable length code tables with different parameters.
摘要翻译：可变长度编码的方法将每个接收到的符号分类为具有基于分类内的接收符号的概率分布而选择的对应的可变长度码表的多个分类中的一个。根据与该接收符号的分类对应的可变长度码表，可变长度码字输出对应于接收符号。多个分类和对应的可变长度码表可以是预定和固定的。或者，可变长度代码表可以用指定可变长度代码表及其配置的从编码器发送到解码器的数据来动态地确定。通用可变长度代码（UVLC）用于对符号进行编码。通用可变长度代码可以实例化为具有不同参数的不同可变长度代码表。

6. 发明授权

US06552674B2 Automatic configuration of universal variable length code for video coding 有权
公开(公告)号：US06552674B2
公开(公告)日：2003-04-22
申请号：US10077126
申请日：2002-02-15
申请人： Ngai-Man Cheung , Yuji Itoh
发明人： Ngai-Man Cheung , Yuji Itoh
IPC分类号： H03M740
CPC分类号： H03M7/40
摘要： This invention is a method to automatically configure the universal variable length coding (UVLC). The method is applicable to code the syntax elements with a lot of symbols like the transform coefficients and motion vectors. The configuration problem includes a configuration method based on a genetic algorithm (GA). The method can be applied to on-the-fly configuration of codewords during video encoding, or to off-line training of code tables. This invention also includes several techniques to reduce the required operations for applications which have only limited processing power.

7. 发明授权

US08111760B2 Deblocking filters 有权
标题翻译：去块过滤器
公开(公告)号：US08111760B2
公开(公告)日：2012-02-07
申请号：US11560367
申请日：2006-11-16
申请人： Ching-Yu Hung , Ngai-Man Cheung
发明人： Ching-Yu Hung , Ngai-Man Cheung
IPC分类号： H04N7/12
CPC分类号： H04N19/86 , H04N19/117 , H04N19/14 , H04N19/176 , H04N19/182 , H04N19/61 , H04N19/82
摘要： Deblock filtering for Microsoft WMV video decoders partitions the computation so that the deblock filtering operations can be performed on horizontal or vertical stripes or in one pass on oversized macroblocks.
摘要翻译：用于Microsoft WMV视频解码器的去块过滤器对计算进行分块，使得可以在水平或垂直条纹上执行去块滤波操作，或者在超大宏块上进行一次通过。

8. 发明授权

US08854486B2 Method and system for processing multiview videos for view synthesis using skip and direct modes 有权
标题翻译：用于使用跳过和直接模式处理视频合成的多视点视频的方法和系统
公开(公告)号：US08854486B2
公开(公告)日：2014-10-07
申请号：US13299195
申请日：2011-11-17
申请人： Dong Tian , Ngai-Man Cheung , Anthony Vetro
发明人： Dong Tian , Ngai-Man Cheung , Anthony Vetro
IPC分类号： H04N5/225 , H04N13/02 , H04N7/12 , H04N19/122 , H04N19/174 , H04N7/18 , H04N19/61 , H04N19/597 , H04N19/105 , H04N19/176 , H04N19/423 , H04N19/51 , H04N19/577 , H04N19/27 , H04N19/159 , H04N19/70 , H04N19/172 , H04N19/63 , H04N19/635 , H04N19/132 , H04N19/615 , H04N19/46 , H04N19/14 , H04N19/147 , H04N19/54 , H04N19/13
CPC分类号： H04N19/008 , H04N7/181 , H04N19/105 , H04N19/122 , H04N19/13 , H04N19/132 , H04N19/14 , H04N19/147 , H04N19/159 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/27 , H04N19/423 , H04N19/46 , H04N19/52 , H04N19/54 , H04N19/573 , H04N19/577 , H04N19/597 , H04N19/61 , H04N19/615 , H04N19/619 , H04N19/63 , H04N19/635 , H04N19/70
摘要： Multiview videos are acquired by overlapping cameras. Side information is used to synthesize multiview videos. A reference picture list is maintained for current frames of the multiview videos, the reference picture indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list with a skip mode and a direct mode, whereby the side information is inferred from the synthesized reference picture. Alternatively, the depth images corresponding to the multiview videos of the input data, and this data are encoded as part of the bitstream depending on a SKIP type.
摘要翻译：多视角视频是通过重叠的相机获得的。侧面信息用于合成多视点视频。维护多视点视频的当前帧的参考图片列表，参考图片索引所获取的多视角视频的时间参考图片和空间参考图片以及合成的多视角视频的合成参考图片。根据由相关联的参考图像列表以跳过模式和直接模式索引的参考图像来预测多视图视频的每个当前帧，由此从合成的参考图片推断出侧面信息。或者，与输入数据的多视点视频相对应的深度图像，并且该数据根据SKIP类型被编码为比特流的一部分。

9. 发明申请

US20070002949A1 Fast partial pixel motion estimation for video encoding 审中-公开
标题翻译：用于视频编码的快速部分像素运动估计
公开(公告)号：US20070002949A1
公开(公告)日：2007-01-04
申请号：US11173293
申请日：2005-06-30
申请人： Ngai-Man Cheung , Yiliang Bao
发明人： Ngai-Man Cheung , Yiliang Bao
IPC分类号： H04N11/02
CPC分类号： H04N19/523
摘要： Fast partial pixel motion estimation for video encoding can include a technique in which a current partition mode is determined. Where the current partition mode is a 16 by 16 mode, an estimation module compares the gain from a half-pel motion estimation against a half-pel gain threshold and, if the gain exceeds the half-pel gain threshold, the estimation module performs a quarter-pel motion estimation for an entire partition. Where the current partition mode is a 16 by 8 or a 8 by 16 mode, the estimation module determines if a current partition is the first partition in the current macroblock. If the current partition is the first partition in the current macroblock, the estimation module performs a quarter-pel motion estimation for the current partition, determines if the gain from quarter-pel motion estimation is greater than a quarter-pel gain threshold, and sets a flag to true if the gain from quarter-pel motion estimation is greater and the flag to false if the gain from quarter-pel motion estimation is not greater. If the current partition is not the first partition in the current macroblock, the estimation module determines if the flag is true or false and, if true, estimation module performs a quarter-pel motion estimation for the current partition.
摘要翻译：用于视频编码的快速部分像素运动估计可以包括确定当前分区模式的技术。在当前分区模式是16×16模式的情况下，估计模块将来自半像素运动估计的增益与半像素增益阈值进行比较，并且如果增益超过半像素增益阈值，则估计模块执行整个分区的四分之一像素运动估计。在当前分区模式是16×8或8×16模式的情况下，估计模块确定当前分区是否是当前宏块中的第一分区。如果当前分区是当前宏块中的第一分区，则估计模块对当前分区执行四分之一像素运动估计，确定来自四分之一像素运动估计的增益是否大于四分之一像素增益阈值，并且设置如果来自四分之一像素运动估计的增益较大，并且如果来自四分之一像素运动估计的增益不大，则该标志为假。如果当前分区不是当前宏块中的第一分区，则估计模块确定标志是真还是假，如果为真，则估计模块对当前分区执行四分之一像素运动估计。

10. 发明申请

US20120062756A1 Method and System for Processing Multiview Videos for View Synthesis Using Skip and Direct Modes 有权
标题翻译：用于使用跳过和直接模式查看合成的多视图视频的方法和系统
公开(公告)号：US20120062756A1
公开(公告)日：2012-03-15
申请号：US13299195
申请日：2011-11-17
申请人： Dong Tian , Ngai-Man Cheung , Anthony Vetro
发明人： Dong Tian , Ngai-Man Cheung , Anthony Vetro
IPC分类号： H04N5/225
CPC分类号： H04N19/008 , H04N7/181 , H04N19/105 , H04N19/122 , H04N19/13 , H04N19/132 , H04N19/14 , H04N19/147 , H04N19/159 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/27 , H04N19/423 , H04N19/46 , H04N19/52 , H04N19/54 , H04N19/573 , H04N19/577 , H04N19/597 , H04N19/61 , H04N19/615 , H04N19/619 , H04N19/63 , H04N19/635 , H04N19/70
摘要： Multiview videos are acquired by overlapping cameras. Side information is used to synthesize multiview videos. A reference picture list is maintained for current frames of the multiview videos, the reference picture indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list with a skip mode and a direct mode, whereby the side information is inferred from the synthesized reference picture. Alternatively, the depth images corresponding to the multiview videos of the input data, and this data are encoded as part of the bitstream depending on a SKIP type.
摘要翻译：多视角视频是通过重叠的相机获得的。侧面信息用于合成多视点视频。维护多视点视频的当前帧的参考图片列表，参考图片索引所获取的多视角视频的时间参考图片和空间参考图片以及合成的多视角视频的合成参考图片。根据由相关联的参考图像列表以跳过模式和直接模式索引的参考图像来预测多视图视频的每个当前帧，由此从合成的参考图片推断出侧面信息。或者，与输入数据的多视点视频相对应的深度图像，并且该数据根据SKIP类型被编码为比特流的一部分。

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