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51. 发明申请

US20090262798A1 Tone mapping for bit-depth scalable video codec 有权
标题翻译：用于位深度可缩放视频编解码器的色调映射
公开(公告)号：US20090262798A1
公开(公告)日：2009-10-22
申请号：US12148131
申请日：2008-04-16
申请人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
发明人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
IPC分类号： H04B1/66
CPC分类号： H04N19/80 , H04N19/117 , H04N19/14 , H04N19/182 , H04N19/184 , H04N19/186 , H04N19/187 , H04N19/30 , H04N19/44 , H04N19/46
摘要： A scalable video codec may convert lower bit depth video to higher bit depth video using decoded lower bit depth video for tone mapping and tone mapping derivation. The conversion can also use the filtered lower bit depth video for tone mapping and tone mapping derivation.
摘要翻译：可扩展视频编解码器可以使用解码的低位深度视频将低位深度视频转换为较高位深度视频，用于色调映射和色调映射推导。转换也可以使用滤波的较低位深度视频进行色调映射和色调映射推导。

52. 发明申请

US20090257670A1 In-loop adaptive wiener filter for video coding and decoding 有权
标题翻译：用于视频编码和解码的环路自适应维纳滤波器
公开(公告)号：US20090257670A1
公开(公告)日：2009-10-15
申请号：US12082182
申请日：2008-04-09
申请人： Yi-Jen Chiu , Lidong Xu
发明人： Yi-Jen Chiu , Lidong Xu
IPC分类号： H04N7/24
CPC分类号： H04N19/117 , H04N19/136 , H04N19/157 , H04N19/17 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/18 , H04N19/182 , H04N19/61 , H04N19/65 , H04N19/82 , H04N19/86
摘要： A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed.
摘要翻译：视频编码器可以在核心视频编码环路内使用自适应维纳滤波器来提高编码效率。在一个实施例中，维纳滤波器可以在运动估计单元的输入上，并且在另一个实施例中，其可以在运动补偿单元的输出上。用于维纳滤波器的抽头可以基于图像内的像素强度的至少一个区域的特性来确定。因此，滤波可以是适应性的，因为它根据正在处理的视频的类型而变化。

53. 发明授权

US09654792B2 Methods and systems for motion vector derivation at a video decoder 有权
公开(公告)号：US09654792B2
公开(公告)日：2017-05-16
申请号：US12567540
申请日：2009-09-25
申请人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
发明人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
IPC分类号： H04N7/26 , H04N19/52 , H04N19/577 , H04N19/56 , H04N19/51 , H04N19/44
CPC分类号： H04N19/52 , H04N19/44 , H04N19/51 , H04N19/56 , H04N19/577
摘要： Method and apparatus for deriving a motion vector at a video decoder. A block-based motion vector may be produced at the video decoder by utilizing motion estimation among available pixels relative to blocks in one or more reference frames. The available pixels could be, for example, spatially neighboring blocks in the sequential scan coding order of a current frame, blocks in a previously decoded frame, or blocks in a downsampled frame in a lower pyramid when layered coding has been used.

54. 发明申请

US20140355895A1 ADAPTIVE MOTION INSTABILITY DETECTION IN VIDEO 有权
标题翻译：视频中的自适应运动不稳定性检测
公开(公告)号：US20140355895A1
公开(公告)日：2014-12-04
申请号：US14218457
申请日：2014-03-18
申请人： Lidong Xu , Chen Wang , Yi-Jen Chiu , Jong Dae Oh , Heon-Mo Koo
发明人： Lidong Xu , Chen Wang , Yi-Jen Chiu , Jong Dae Oh , Heon-Mo Koo
IPC分类号： G06K9/62 , H04N5/232
CPC分类号： G06K9/6298 , H04N5/23267
摘要： One or more apparatus and method for adaptively detecting motion instability in video. In embodiments, video stabilization is predicated on adaptive detection of motion instability. Adaptive motion instability detection may entail determining an initial motion instability state associated with a plurality of video frames. Subsequent transitions of the instability state may be detected by comparing a first level of instability associated with a first plurality of the frames to a second level of instability associated with a second plurality of the frames. Image stabilization of received video frames may be toggled first based on the initial instability state, and thereafter based on detected changes in the instability state.Output video frames, which may be stabilized or non-stabilized, may then be stored to a memory. In certain embodiments, video motion instability is scored based on a probability distribution of video frame motion jitter values.
摘要翻译：一种或多种用于自适应地检测视频中的运动不稳定性的装置和方法。在实施例中，视频稳定基于运动不稳定性的自适应检测。自适应运动不稳定性检测可能需要确定与多个视频帧相关联的初始运动不稳定状态。可以通过将与第一多个帧相关联的不稳定性的第一级别与与第二多个帧相关联的第二级不稳定性进行比较来检测不稳定状态的后续转换。首先可以基于初始不稳定状态来切换所接收的视频帧的图像稳定性，然后基于检测到的不稳定状态的变化。然后可以将稳定或不稳定的输出视频帧存储到存储器中。在某些实施例中，基于视频帧运动抖动值的概率分布对视频运动不稳定性进行评分。

55. 发明授权

US08625681B2 Rate-distortion cost reducing video encoding techniques 有权
标题翻译：速率失真成本降低视频编码技术
公开(公告)号：US08625681B2
公开(公告)日：2014-01-07
申请号：US12217805
申请日：2008-07-09
申请人： Lidong Xu , Yi-Jen Chiu
发明人： Lidong Xu , Yi-Jen Chiu
IPC分类号： H04N1/409 , H04N5/217
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/17 , H04N19/46 , H04N19/61
摘要： Techniques are described that can be used to determine parameters of an adaptive Wiener filter to apply to a video region. The following parameters of the Wiener filter may be adjusted: coefficients, coefficient quantization, filter type, filter size, prediction mode, entropy encoding, and number of filter tables. The parameters associated with the lowest rate distortion cost of the encoder are selected for transmission with the encoded video. If not using adaptive Wiener filtering results in a lowest rate distortion cost, then adaptive Wiener filtering is not used for the video region. If using adaptive Wiener filtering results in a lowest rate distortion cost, then the parameters applied by the adaptive Wiener filtering that result in the lowest rate distortion cost are communicated with the filtered video region.
摘要翻译：描述了可以用于确定适用于视频区域的自适应维纳滤波器的参数的技术。可以调整维纳滤波器的以下参数：系数，系数量化，滤波器类型，滤波器大小，预测模式，熵编码和滤波器表数。选择与编码器的最低速率失真成本相关联的参数以便与编码视频一起传输。如果不使用自适应维纳滤波导致最低速率失真成本，则视频区域不使用自适应维纳滤波。如果使用自适应维纳滤波导致最低速率失真成本，则导致最低速率失真成本的自适应维纳滤波所应用的参数与滤波视频区域通信。

56. 发明申请

US20130336402A1 METHODS AND APPARATUS FOR ADAPTIVELY CHOOSING A SEARCH RANGE FOR MOTION ESTIMATION 审中-公开
标题翻译：适应性选择运动估计搜索范围的方法和装置
公开(公告)号：US20130336402A1
公开(公告)日：2013-12-19
申请号：US13895939
申请日：2013-05-16
申请人： Lidong Xu , Yi-Jen Chiu
发明人： Lidong Xu , Yi-Jen Chiu
IPC分类号： H04N7/36
CPC分类号： H04N19/139 , H04N5/144 , H04N19/513 , H04N19/521 , H04N19/56 , H04N19/57
摘要： Systems, methods, and computer program products that can be used to determine a search range (SR) when performing motion estimation at, for example, a video encoder or decoder. Determining a motion vector for a current block during motion estimation may involve searching within a search window that may reside in a reference frame, or in a previously decoded block that spatially or temporally neighbors the current block. Such a search seeks a motion vector that minimizes a metric, such as a sum of absolute differences between corresponding blocks of reference frames. A motion vector that minimizes such a metric may be a good candidate for use in motion estimation. The search may become more efficient if a search range is determined such that the extent of the search is bounded. A search range may be determined at the block level or at the picture level.
摘要翻译：当在例如视频编码器或解码器上执行运动估计时，可用于确定搜索范围（SR）的系统，方法和计算机程序产品。在运动估计期间确定当前块的运动矢量可以涉及在可能驻留在参考帧中的搜索窗口内或在空间上或时间上邻近当前块的先前解码的块中进行搜索。这样的搜索寻找使度量最小化的运动矢量，诸如对应的参考帧块之间的绝对差的和。使这种度量最小化的运动矢量可能是用于运动估计的良好候选。如果确定搜索范围使得搜索范围有界，则搜索可能变得更有效。可以在块级别或图片级别确定搜索范围。

57. 发明授权

US08184693B2 Adaptive filtering for bit-depth scalable video codec 有权
标题翻译：位深度可分级视频编解码器的自适应滤波
公开(公告)号：US08184693B2
公开(公告)日：2012-05-22
申请号：US12082561
申请日：2008-04-11
申请人： Yi-Jen Chiu , Lidong Xu
发明人： Yi-Jen Chiu , Lidong Xu
IPC分类号： H04N7/12
CPC分类号： H04N19/36 , H04N19/117 , H04N19/30 , H04N19/46 , H04N19/61 , H04N19/80
摘要： Adaptive filtering may be used to increase the quality of tone mapped, baseline layer encoded information. As a result, scalable video codecs may be implemented with improved picture quality in some embodiments.
摘要翻译：自适应滤波可用于增加色调映射，基线层编码信息的质量。结果，在一些实施例中，可升级的视频编解码器可以用改进的图像质量来实现。

58. 发明申请

US20100008427A1 Color gamut scalability techniques 有权
标题翻译：色域可扩展性技术
公开(公告)号：US20100008427A1
公开(公告)日：2010-01-14
申请号：US12283305
申请日：2008-09-11
申请人： Yi-Jen Chiu , Hong Jiang , Lidong Xu , Ya-Ti Peng
发明人： Yi-Jen Chiu , Hong Jiang , Lidong Xu , Ya-Ti Peng
IPC分类号： H04N11/02
CPC分类号： H04N9/64 , H04N1/64 , H04N19/186 , H04N19/30 , H04N19/60
摘要： Techniques are described that can be used to either compress or expand video. Color compression techniques are described that can be used to compress the wide color gamut content into lower color gamut for inclusion in a baseline layer. Color expansion techniques are described that convert lower color gamut data into wider color gamut format for inclusion in an enhancement layer. Both of the baseline video stream and enhancement layer video streams may be transmitted through a channel or stored in a memory device to be viewed later. Accordingly, both baseline and enhancement video layers are available so that either lower or higher quality displays can be used to display video.
摘要翻译：描述了可用于压缩或扩展视频的技术。描述了可用于将宽色域内容压缩到较低色域以包含在基线层中的色彩压缩技术。描述了将较低色域数据转换成更宽的色域格式以包含在增强层中的颜色展开技术。基线视频流和增强层视频流都可以通过信道发送或存储在存储设备中，以便稍后观看。因此，基线和增强视频层都可用，以便可以使用较低或较高质量的显示器来显示视频。

59. 发明授权

US09338475B2 Tone mapping for bit-depth scalable video codec 有权
公开(公告)号：US09338475B2
公开(公告)日：2016-05-10
申请号：US12148131
申请日：2008-04-16
申请人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
发明人： Yi-Jen Chiu , Lidong Xu , Hong Jiang
IPC分类号： H04N19/80 , H04N19/46 , H04N19/30 , H04N19/117 , H04N19/14 , H04N19/186 , H04N19/182 , H04N19/184 , H04N19/187 , H04N19/44
CPC分类号： H04N19/80 , H04N19/117 , H04N19/14 , H04N19/182 , H04N19/184 , H04N19/186 , H04N19/187 , H04N19/30 , H04N19/44 , H04N19/46
摘要： A scalable video codec may convert lower bit depth video to higher bit depth video using decoded lower bit depth video for tone mapping and tone mapping derivation. The conversion can also use the filtered lower bit depth video for tone mapping and tone mapping derivation.

60. 发明申请

US20140098866A1 In-Loop Adaptive Wiener Filter for Video Coding and Decoding 审中-公开
标题翻译：用于视频编码和解码的环路自适应维纳滤波器
公开(公告)号：US20140098866A1
公开(公告)日：2014-04-10
申请号：US14104028
申请日：2013-12-12
申请人： Yi-Jen Chiu , Lidong Xu
发明人： Yi-Jen Chiu , Lidong Xu
IPC分类号： H04N7/26
CPC分类号： H04N19/117 , H04N19/136 , H04N19/157 , H04N19/17 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/18 , H04N19/182 , H04N19/61 , H04N19/65 , H04N19/82 , H04N19/86
摘要： A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed.
摘要翻译：视频编码器可以在核心视频编码环路内使用自适应维纳滤波器来提高编码效率。在一个实施例中，维纳滤波器可以在运动估计单元的输入上，并且在另一个实施例中，其可以在运动补偿单元的输出上。用于维纳滤波器的抽头可以基于图像内的像素强度的至少一个区域的特性来确定。因此，滤波可以是适应性的，因为它根据正在处理的视频的类型而变化。

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