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41. 发明授权

US08155195B2 Switching distortion metrics during motion estimation 有权
标题翻译：运动估计过程中的切换失真度量
公开(公告)号：US08155195B2
公开(公告)日：2012-04-10
申请号：US11400049
申请日：2006-04-07
申请人： Shankar Regunathan , Chih-Lung Lin , Thomas W. Holcomb
发明人： Shankar Regunathan , Chih-Lung Lin , Thomas W. Holcomb
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04
CPC分类号： H04N19/567
摘要： Techniques and tools for switching distortion metrics during motion estimation are described. For example, a video encoder determines a distortion metric selection criterion for motion estimation. The criterion can be based on initial results of the motion estimation. To evaluate the criterion, the encoder can compare the criterion to a threshold that depends on a current quantization parameter. The encoder selects between multiple available distortion metrics, which can include a sample-domain distortion metric (e.g., SAD) and a transform-domain distortion metric (e.g., SAHD). The encoder uses the selected distortion metric in the motion estimation. Selectively switching between SAD and SAHD provides rate-distortion performance superior to using only SAD or only SAHD. Moreover, due to the lower complexity of SAD, the computational complexity of motion estimation with SAD-SAHD switching is typically less than motion estimation that always uses SAHD.
摘要翻译：描述了在运动估计期间切换失真度量的技术和工具。例如，视频编码器确定用于运动估计的失真度量选择标准。该标准可以基于运动估计的初始结果。为了评估标准，编码器可以将标准与取决于当前量化参数的阈值进行比较。编码器在可以包括采样域失真度量（例如SAD）和变换域失真度量（例如，SAHD）的多个可用失真度量之间进行选择。编码器在运动估计中使用所选择的失真度量。选择性地切换SAD和SAHD之间的速率失真性能优于仅使用SAD或仅SAHD。此外，由于SAD的较低的复杂度，SAD-SAHD切换的运动估计的计算复杂度通常小于始终使用SAHD的运动估计。

42. 发明申请

US20080240250A1 Regions of interest for quality adjustments 有权
标题翻译：感兴趣的地区进行质量调整
公开(公告)号：US20080240250A1
公开(公告)日：2008-10-02
申请号：US11731851
申请日：2007-03-30
申请人： Chih-Lung Lin , Ming-Chieh Lee , Stacey Spears , Philip Lawrence Garrett , Anil Madhav Murching , Amy Jennifer Beauford , Thomas W. Holcomb , Xiping Zuo
发明人： Chih-Lung Lin , Ming-Chieh Lee , Stacey Spears , Philip Lawrence Garrett , Anil Madhav Murching , Amy Jennifer Beauford , Thomas W. Holcomb , Xiping Zuo
IPC分类号： H04N11/04
CPC分类号： H04N19/17 , H04N19/124 , H04N19/147 , H04N19/162 , H04N19/61
摘要： Quality settings established by an encoder are adjusted based on information associated with regions of interest (“ROIs”). For example, quantization step sizes can be reduced (to improve quality) or increased (to reduce bit rate). ROIs can be identified and quality settings can be adjusted based on input received from a user interface. An overlap setting can be determined for a portion of a picture that corresponds to an ROI overlap area. For example, an overlap setting is chosen from step sizes corresponding to a first overlapping ROI and a second overlapping ROI, or from relative reductions in step size corresponding to the first ROI and the second ROI. ROIs can be parameterized by information (e.g., using data structures) that indicates spatial dimensions of the ROIs and quality adjustment information (e.g., dead zone information, step size information, and quantization mode information).
摘要翻译：基于与感兴趣区域（“ROI”）相关联的信息来调整由编码器建立的质量设置。例如，可以减小量化步长（提高质量）或增加（以减少比特率）。可以识别ROI，并且可以基于从用户界面接收的输入来调整质量设置。可以针对对应于ROI重叠区域的图像的一部分来确定重叠设置。例如，从与第一重叠ROI和第二重叠ROI相对应的步长尺寸或从与第一ROI和第二ROI对应的步长的相对减小中选择重叠设置。可以通过指示ROI的空间维度和质量调整信息（例如，死区信息，步长信息和量化模式信息）的信息（例如，使用数据结构）对ROI进行参数化。

43. 发明授权

US08494052B2 Dynamic selection of motion estimation search ranges and extended motion vector ranges 有权
标题翻译：运动估计搜索范围和扩展运动矢量范围的动态选择
公开(公告)号：US08494052B2
公开(公告)日：2013-07-23
申请号：US11400051
申请日：2006-04-07
申请人： Cheng Chang , Chih-Lung Lin , Thomas W. Holcomb
发明人： Cheng Chang , Chih-Lung Lin , Thomas W. Holcomb
IPC分类号： H04N11/02
CPC分类号： H04N19/192 , H04N19/51
摘要： Techniques and tools for selecting search ranges and/or motion vector ranges during motion estimation are described. For example, a video encoder performs motion estimation constrained by a first search range, which results in multiple motion vectors. The encoder computes motion vector distribution information for the motion vectors. To compute the distribution information, the encoder can track the motion vectors in a histogram and count how many of the motion vectors fall within each of multiple intervals for the distribution information. The encoder then selects a second search range and performs motion estimation constrained by the second search range. Selecting the second search range can include selecting a motion vector range, which in some cases in effect determines the second search range.
摘要翻译：描述了在运动估计期间选择搜索范围和/或运动矢量范围的技术和工具。例如，视频编码器执行由第一搜索范围约束的运动估计，其导致多个运动矢量。编码器计算运动矢量的运动矢量分布信息。为了计算分布信息，编码器可以跟踪直方图中的运动矢量，并计算多少个运动矢量落在分布信息的多个间隔的每一个中。然后，编码器选择第二搜索范围并执行受第二搜索范围约束的运动估计。选择第二搜索范围可以包括选择运动矢量范围，其在某些情况下有效地确定第二搜索范围。

44. 发明授权

US07924921B2 Signaling coding and display options in entry point headers 有权
标题翻译：入口点标题中的信号编码和显示选项
公开(公告)号：US07924921B2
公开(公告)日：2011-04-12
申请号：US10989845
申请日：2004-11-15
申请人： Regis J. Crinon , Chih-Lung Lin , Jie Liang , Shankar Regunathan , Shuo-Jen Wu , Timothy E. Onders , Thomas W. Holcomb
发明人： Regis J. Crinon , Chih-Lung Lin , Jie Liang , Shankar Regunathan , Shuo-Jen Wu , Timothy E. Onders , Thomas W. Holcomb
IPC分类号： H04N11/04 , H04N7/48 , H04N7/50 , H04N11/24
CPC分类号： H04N21/23424 , H04N19/44 , H04N19/70 , H04N21/44016 , H04N21/8455
摘要： A decoder receives an entry point header comprising plural control parameters for an entry point segment corresponding to the entry point header. The entry point header is in an entry point layer of a bitstream comprising plural layers. The decoder decodes the entry point header. The plural control parameters can include various combinations of control parameters such as a pan scan on/off parameter, a reference frame distance on/off parameter, a loop filtering on/off parameter, a fast chroma motion compensation on/off parameter, an extended range motion vector on/off parameter, a variable sized transform on/off parameter, an overlapped transform on/off parameter, a quantization decision parameter, and an extended differential motion vector coding on/off parameter, a broken link parameter, a closed entry parameter, one or more coded picture size parameters, one or more range mapping parameters, a hypothetical reference decoder buffer parameter, and/or other parameter(s).
摘要翻译：解码器接收包括与入口点标题相对应的入口点段的多个控制参数的入口点标题。入口点头在包含多个层的比特流的入口点层中。解码器解码入口点标题。多个控制参数可以包括控制参数的各种组合，例如平移扫描开启/关闭参数，参考帧距离开/关参数，循环滤波开/关参数，快速色度运动补偿开/关参数，扩展范围运动矢量开/关参数，可变大小的变换开/关参数，重叠变换开/关参数，量化决定参数和扩展差分运动矢量编码开/关参数，断链接参数，关闭条目参数，一个或多个编码图像大小参数，一个或多个范围映射参数，假设参考解码器缓冲器参数和/或其他参数。

45. 发明授权

US07782954B2 Scan patterns for progressive video content 有权
标题翻译：逐行视频内容的扫描模式
公开(公告)号：US07782954B2
公开(公告)日：2010-08-24
申请号：US10989594
申请日：2004-11-15
申请人： Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas W. Holcomb
发明人： Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas W. Holcomb
IPC分类号： H04N7/30 , H04N7/50
CPC分类号： H04N19/93 , H04N19/129 , H04N19/13 , H04N19/159 , H04N19/16 , H04N19/176 , H04N19/196 , H04N19/463 , H04N19/61 , H04N19/70
摘要： Tools and techniques for applying scan patterns during encoding and decoding of progressive video are described. For example, a video decoder entropy decodes transform coefficients in a one-dimensional array and scans the transform coefficients into a block according to a scan pattern. The block is 8×4, and the scan pattern biases the vertical direction for at least the lowest frequency AC coefficients in the horizontal and vertical directions. Or, the block is 4×8, and the scan pattern biases the horizontal direction for at least the lowest frequency AC coefficients in the horizontal and vertical directions. A corresponding video encoder applies the scan patterns to scan transform coefficients from blocks to one-dimensional arrays.
摘要翻译：描述了在逐行视频的编码和解码期间应用扫描模式的工具和技术。例如，视频解码器熵解码一维阵列中的变换系数，并根据扫描模式将变换系数扫描成块。该块为8×4，并且扫描图案对于水平和垂直方向上的至少最低频率AC系数偏置垂直方向。或者，该块为4×8，并且扫描图案在水平和垂直方向上至少对最低频率AC系数偏置水平方向。相应的视频编码器应用扫描图案来扫描从块到一维阵列的变换系数。

46. 发明申请

US20080240235A1 Adaptive deadzone size adjustment in quantization 有权
标题翻译：量化中的适应性死区大小调整
公开(公告)号：US20080240235A1
公开(公告)日：2008-10-02
申请号：US11728895
申请日：2007-03-26
申请人： Thomas W. Holcomb , Minghui Xia , Chih-Lung Lin , Cheng Chang
发明人： Thomas W. Holcomb , Minghui Xia , Chih-Lung Lin , Cheng Chang
IPC分类号： H04N7/24
CPC分类号： H04N19/18 , H04N19/124 , H04N19/14 , H04N19/176
摘要： Techniques and tools are described for adaptive deadzone (“DZ”) resizing during quantization. For example, in some embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size of a selected quantizer depending on the texture of the block. In other embodiments, a video encoder adjusts DZ size depending on the frequency of a coefficient being quantized. In still other embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size depending on the texture of the block and the frequency of the coefficient being quantized.
摘要翻译：描述了在量化期间适应性死区（“DZ”）调整大小的技术和工具。例如，在一些实施例中，对于块的AC频率系数的量化，视频编码器根据块的纹理来调整所选量化器的DZ大小。在其他实施例中，视频编码器根据被量化的系数的频率来调整DZ大小。在其他实施例中，对于块的AC频率系数的量化，视频编码器根据块的纹理和被量化的系数的频率来调整DZ大小。

47. 发明授权

US08817868B2 Sub-block transform coding of prediction residuals 有权
标题翻译：预测残差的子块变换编码
公开(公告)号：US08817868B2
公开(公告)日：2014-08-26
申请号：US11890059
申请日：2007-08-03
申请人： Thomas W. Holcomb , Chih-Lung Lin
发明人： Thomas W. Holcomb , Chih-Lung Lin
IPC分类号： H04N11/02 , H04N7/36 , H04N7/26 , H04N7/50 , G06T3/40 , G06T7/00
CPC分类号： H04N19/523 , G06T3/40 , G06T7/0012 , H04N19/105 , H04N19/115 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/124 , H04N19/129 , H04N19/132 , H04N19/136 , H04N19/137 , H04N19/146 , H04N19/147 , H04N19/15 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/182 , H04N19/46 , H04N19/50 , H04N19/513 , H04N19/52 , H04N19/527 , H04N19/533 , H04N19/547 , H04N19/57 , H04N19/59 , H04N19/593 , H04N19/61 , H04N19/625 , H04N19/63 , H04N19/70 , H04N19/80 , H04N19/82 , H04N19/86 , H04N19/895
摘要： Techniques and tools for sub-block transform coding are described. For example, a video encoder adaptively switches between 8×8, 8×4, and 4×8 DCTs when encoding 8×8 prediction residual blocks; a corresponding video decoder switches between 8×8, 8×4, and 4×8 inverse DCTs during decoding. The video encoder may determine the transform sizes as well as switching levels (e.g., frame, macroblock, or block) in a closed loop evaluation of the different transform sizes and switching levels. The encoder and decoder may use different scan patterns for different transform sizes when scanning values from two-dimensional blocks into one-dimensional arrays, or vice versa. The encoder and decoder may use sub-block pattern codes to indicate the presence or absence of information for the sub-blocks of particular blocks.
摘要翻译：描述了用于子块变换编码的技术和工具。例如，当编码8×8预测残差块时，视频编码器自适应地在8×8,8×4和4×8DCT之间切换; 相应的视频解码器在解码期间在8×8,8×4和4×8逆DCT之间切换。视频编码器可以在不同的变换大小和切换级别的闭环评估中确定变换大小以及切换级别（例如，帧，宏块或块）。当将来自二维块的值扫描成一维阵列时，编码器和解码器可以使用不同的扫描图案用于不同的变换大小，反之亦然。编码器和解码器可以使用子块模式码来指示特定块的子块的信息的存在或不存在。

48. 发明授权

US08396114B2 Multiple bit rate video encoding using variable bit rate and dynamic resolution for adaptive video streaming 有权
标题翻译：使用可变比特率和自适应视频流的动态分辨率的多比特率视频编码
公开(公告)号：US08396114B2
公开(公告)日：2013-03-12
申请号：US12362420
申请日：2009-01-29
申请人： Chuang Gu , Chun-Wei Chan , William Chen , Stacey Spears , Thomas W. Holcomb , Chih-Lung Lin , Sanjeev Mehrotra
发明人： Chuang Gu , Chun-Wei Chan , William Chen , Stacey Spears , Thomas W. Holcomb , Chih-Lung Lin , Sanjeev Mehrotra
IPC分类号： H04N7/12 , G06K9/36 , G06F11/00
CPC分类号： H04N21/4621 , H04N19/124 , H04N19/14 , H04N19/149 , H04N19/177 , H04N19/61 , H04N19/85 , H04N21/23439 , H04N21/6373 , H04N21/8456
摘要： A video encoding system encodes video streams for multiple bit rate video streaming using an approach that permits the encoded bit rate to vary subject to a peak bit rate and average bit rate constraints for higher quality streams, while a bottom bit rate stream is encoded to achieve a constant chunk rate. The video encoding system also dynamically decides an encoding resolution for segments of the multiple bit rate video streams that varies with video complexity so as to achieve a better visual experience for multiple bit rate streaming.
摘要翻译：视频编码系统使用允许编码比特率根据高质量流的峰比特率和平均比特率约束而变化的方法对多个比特率视频流的视频流进行编码，而底部比特率流被编码以实现恒定的块率。视频编码系统还动态地决定了随着视频复杂度而变化的多个比特率视频流的段的编码分辨率，从而为多个比特率流实现更好的视觉体验。

49. 发明授权

US07688894B2 Scan patterns for interlaced video content 有权
标题翻译：用于隔行视频内容的扫描模式
公开(公告)号：US07688894B2
公开(公告)日：2010-03-30
申请号：US10989844
申请日：2004-11-15
申请人： Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas W. Holcomb
发明人： Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas W. Holcomb
IPC分类号： H04N7/30 , H04N7/50
CPC分类号： H04N19/00 , H04N19/102 , H04N19/109 , H04N19/11 , H04N19/112 , H04N19/117 , H04N19/129 , H04N19/137 , H04N19/146 , H04N19/147 , H04N19/159 , H04N19/16 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/184 , H04N19/186 , H04N19/196 , H04N19/46 , H04N19/463 , H04N19/51 , H04N19/52 , H04N19/523 , H04N19/593 , H04N19/61 , H04N19/63 , H04N19/70 , H04N19/82 , H04N19/86 , H04N19/91 , H04N19/93
摘要： Tools and techniques for applying scan patterns during encoding and decoding of interlaced video are described. For example, a video decoder scans transform coefficients from a one-dimensional array to a two-dimensional block according to a scan pattern. The block is 4×4, and the scan pattern biases the vertical direction by starting with the DC coefficient and three AC coefficients of the lowest horizontal frequency. Or, the block is 8×4, and the scan pattern biases the vertical direction by starting with the DC coefficient and three AC coefficients of the lowest horizontal frequency. Or, the block is 4×8, and the scan pattern biases the horizontal direction for the lowest frequency AC coefficients in the horizontal and vertical directions but biases the vertical direction for at least some other AC coefficients. A corresponding video encoder applies the scan patterns to scan transform coefficients from two-dimensional blocks to one-dimensional arrays.
摘要翻译：描述了在隔行视频的编码和解码期间应用扫描模式的工具和技术。例如，视频解码器根据扫描模式将从一维阵列的变换系数扫描到二维块。该块为4×4，扫描图案以直流系数和最低水平频率的三个AC系数开始偏置垂直方向。或者，块为8×4，扫描图案通过以DC系数和最低水平频率的三个AC系数开始偏置垂直方向。或者，该块为4×8，并且扫描图案在水平和垂直方向上偏置最低频率AC系数的水平方向，但是对于至少一些其它AC系数偏置垂直方向。相应的视频编码器将扫描图案应用于从二维块扫描到一维阵列的变换系数。

50. 发明授权

US07266149B2 Sub-block transform coding of prediction residuals 有权
标题翻译：预测残差的子块变换编码
公开(公告)号：US07266149B2
公开(公告)日：2007-09-04
申请号：US10322352
申请日：2002-12-17
申请人： Thomas W. Holcomb , Chih-Lung Lin
发明人： Thomas W. Holcomb , Chih-Lung Lin
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04B1/06
CPC分类号： H04N19/523 , G06T3/40 , G06T7/0012 , H04N19/105 , H04N19/115 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/124 , H04N19/129 , H04N19/132 , H04N19/136 , H04N19/137 , H04N19/146 , H04N19/147 , H04N19/15 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/182 , H04N19/46 , H04N19/50 , H04N19/513 , H04N19/52 , H04N19/527 , H04N19/533 , H04N19/547 , H04N19/57 , H04N19/59 , H04N19/593 , H04N19/61 , H04N19/625 , H04N19/63 , H04N19/70 , H04N19/80 , H04N19/82 , H04N19/86 , H04N19/895
摘要： Techniques and tools for sub-block transform coding are described. For example, a video encoder adaptively switches between 8×8, 8×4, and 4×8 DCTs when encoding 8×8 prediction residual blocks; a corresponding video decoder switches between 8×8, 8×4, and 4×8 inverse DCTs during decoding. The video encoder may determine the transform sizes as well as switching levels (e.g., frame, macroblock, or block) in a closed loop evaluation of the different transform sizes and switching levels. The encoder and decoder may use different scan patterns for different transform sizes when scanning values from two-dimensional blocks into one-dimensional arrays, or vice versa. The encoder and decoder may use sub-block pattern codes to indicate the presence or absence of information for the sub-blocks of particular blocks.
摘要翻译：描述了用于子块变换编码的技术和工具。例如，当编码8×8预测残差块时，视频编码器自适应地在8×8,8×4和4×8DCT之间切换; 相应的视频解码器在解码期间在8×8,8×4和4×8个逆DCT之间切换。视频编码器可以在不同的变换大小和切换级别的闭环评估中确定变换大小以及切换级别（例如，帧，宏块或块）。当将来自二维块的值扫描成一维阵列时，编码器和解码器可以使用不同的扫描图案用于不同的变换大小，反之亦然。编码器和解码器可以使用子块模式码来指示特定块的子块的信息的存在或不存在。

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