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    Flexible range reduction
    1.
    发明授权
    Flexible range reduction 有权
    弹性范围缩小

    公开(公告)号：US08855202B2

    公开(公告)日：2014-10-07

    申请号：US13191335

    申请日：2011-07-26

    Applicant: Shankar Regunathan ,  Sridhar Srinivasan ,  Jie Liang ,  Chih-Lung Lin ,  Minghui Xia

    Inventor： Shankar Regunathan ,  Sridhar Srinivasan ,  Jie Liang ,  Chih-Lung Lin ,  Minghui Xia

    IPC: H04N7/12 ,  H04N19/46 ,  H04N19/137 ,  H04N19/51 ,  H04N19/196 ,  H04N19/16 ,  H04N19/61 ,  H04N19/70

    CPC classification number: H04N19/00145 ,  H04N19/137 ,  H04N19/16 ,  H04N19/196 ,  H04N19/46 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70

    Abstract: Techniques and tools are described for flexible range reduction of samples of video. For example, an encoder signals a first set of one or more syntax elements for range reduction of luma samples and signals a second set of one or more syntax elements for range reduction of chroma samples. The encoder selectively scales down the luma samples and chroma samples in a manner consistent with the first syntax element(s) and second syntax element(s), respectively. Or, an encoder signals range reduction syntax element(s) in an entry point header for an entry point segment, where the syntax element(s) apply to pictures in the entry point segment. If range reduction is used for the pictures, the encoder scales down samples of the pictures. Otherwise, the encoder skips the scaling down. A decoder performs corresponding parsing and scaling up operations.

    Abstract translation: 描述了技术和工具，用于灵活地缩减视频样本。 例如，编码器用信号通知一个或多个语法元素的第一组，用于亮度样本的范围减小，并且为第二组一个或多个语法元素用于色度样本的范围缩小。 编码器分别以与第一语法元素和第二语法元素一致的方式选择性地缩小亮度样本和色度样本。 或者，编码器对入口点段的入口点标题中的范围缩小语法元素进行信号，其中语法元素适用于入口点段中的图像。 如果图像使用范围缩小，则编码器缩小图像的样本。 否则，编码器跳过缩小比例。 解码器执行相应的解析和放大操作。

    Motion-compensated prediction of inter-layer residuals
    2.
    发明授权
    Motion-compensated prediction of inter-layer residuals 有权
    层间残差运动补偿预测

    公开(公告)号：US08711948B2

    公开(公告)日：2014-04-29

    申请号：US12077768

    申请日：2008-03-21

    Applicant: Chengjie Tu ,  Sridhar Srinivasan ,  Shankar Regunathan ,  Shijun Sun ,  Chih-Lung Lin

    Inventor： Chengjie Tu ,  Sridhar Srinivasan ,  Shankar Regunathan ,  Shijun Sun ,  Chih-Lung Lin

    IPC: H04N7/12

    CPC classification number: H04N19/00442 ,  H04N19/30 ,  H04N19/34 ,  H04N19/61 ,  H04N19/63

    Abstract: Techniques and tools are described for scalable video encoding and decoding. In some embodiments, an encoding tool encodes base layer video and outputs encoded base layer video in a base layer bit stream. The encoding tool encodes inter-layer residual video (representing differences between input video and reconstructed base layer video) using motion compensation relative to previously reconstructed inter-layer residual video. For the inter-layer residual video, the encoding tool outputs motion information and motion-compensated prediction residuals in an enhancement layer bit stream. A decoding tool receives the base layer bit stream and enhancement layer bit stream, reconstructs base layer video, reconstructs inter-layer residual video, and combines the reconstructed base layer video and reconstructed inter-layer residual video. Using motion compensation for the inter-layer residual video facilitates the use of separate motion vectors and separate codecs for the base layer video and inter-layer residual video.

    Abstract translation: 描述了可扩展视频编码和解码的技术和工具。 在一些实施例中，编码工具对基层视频进行编码并在基层比特流中输出经编码的基层视频。 编码工具使用相对于先前重建的层间残留视频的运动补偿来编码层间残差视频（表示输入视频和重建的基本层视频之间的差异）。 对于层间残差视频，编码工具在增强层比特流中输出运动信息和运动补偿预测残差。 解码工具接收基层比特流和增强层比特流，重构基层视频，重建层间残留视频，并组合重建的基层视频和重建层间残留视频。 对于层间残留视频使用运动补偿有助于使用单独的运动矢量和单独的编解码器用于基本层视频和层间残留视频。

    Signaling for fading compensation
    4.
    发明授权
    Signaling for fading compensation 有权
    信号衰落补偿

    公开(公告)号：US07609767B2

    公开(公告)日：2009-10-27

    申请号：US10379079

    申请日：2003-03-03

    Applicant: Sridhar Srinivasan ,  Shankar Regunathan

    Inventor： Sridhar Srinivasan ,  Shankar Regunathan

    IPC: H04N7/18

    CPC classification number: H04N19/93 ,  H04N19/17 ,  H04N19/186 ,  H04N19/46 ,  H04N19/51 ,  H04N19/517 ,  H04N19/53 ,  H04N19/61 ,  H04N19/70 ,  H04N19/85

    Abstract: Techniques and tools for signaling for fading compensation in video processing applications are described. For example, a video encoder performs fading compensation on a reference image, signals that fading compensation is used, and signals fading parameters for the fading compensation. A video decoder receives the signaled information and performs fading compensation on the reference image according to the fading parameters.

    Abstract translation: 描述了在视频处理应用中用于衰落补偿信令的技术和工具。 例如，视频编码器对参考图像执行衰落补偿，使用衰落补偿的信号，以及用于衰落补偿的信号衰落参数。 视频解码器接收信号信息，并根据衰落参数对参考图像执行衰落补偿。

    Non-zero coefficient block pattern coding
    6.
    发明申请
    Non-zero coefficient block pattern coding 有权
    非零系数块模式编码

    公开(公告)号：US20070036222A1

    公开(公告)日：2007-02-15

    申请号：US11203007

    申请日：2005-08-12

    Applicant: Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan

    Inventor： Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan

    IPC: H04N11/04

    CPC classification number: H04N19/14 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/91

    Abstract: A block transform-based digital media codec efficiently compresses digital media data using block patterns representing whether a block's coefficients are zero- valued, such that their explicit encoding is skipped. Because the block patterns can have widely varying probability distributions, the codec adaptively chooses a prediction mode for modifying the block patterns (e.g., based on spatial prediction, or inverting) to enhance their compression using entropy coding techniques. Further, with high spatial correlation of block patterns, the codec encodes a meta block pattern for a region indicating whether all block patterns of the region represent zero-valued coefficient blocks. In such cases, the codec can then also omit explicitly encoding the block patterns in those regions.

    Abstract translation: 基于块变换的数字媒体编解码器使用表示块的系数是否为零值的块模式来有效地压缩数字媒体数据，使得它们的显式编码被跳过。 由于块图案可以具有广泛变化的概率分布，所以编解码器自适应地选择用于修改块模式的预测模式（例如，基于空间预测或反转），以使用熵编码技术增强其压缩。 此外，随着块模式的高空间相关性，编解码器编码用于指示该区域的所有块模式是否表示零值系数块的区域的元块模式。 在这种情况下，编解码器也可以省略对这些区域中的块模式的明确编码。

    Slice-layer in video codec
    7.
    发明授权
    Slice-layer in video codec 有权
    视频编解码器中的切片层

    公开(公告)号：US07162093B2

    公开(公告)日：2007-01-09

    申请号：US10933960

    申请日：2004-09-03

    Applicant: Shankar Regunathan ,  Pohsiang Hsu ,  Ce Wang ,  Chih-Lung Lin ,  Jie Liang ,  Sridhar Srinivasan

    Inventor： Shankar Regunathan ,  Pohsiang Hsu ,  Ce Wang ,  Chih-Lung Lin ,  Jie Liang ,  Sridhar Srinivasan

    IPC: G06K9/36 ,  G06K9/46

    CPC classification number: H04N19/86 ,  H04N19/105 ,  H04N19/107 ,  H04N19/166 ,  H04N19/174 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82

    Abstract: A video encoder/decoder utilizes a bistream syntax that provides an independently decodable, partial picture unit, which may be in the form of a unit containing one or more contiguous rows of macroblocks (called a slice). This slice layer provides a flexible combination of error-resilience and compression efficiency. The slice layer encodes an efficient addressing mechanism (e.g., a syntax element specifying a beginning macroblock row of the slice layer), as well as an efficient mechanism to optionally retransmit picture header information. The slice layer provides decoding and reconstruction independence by disabling all forms of prediction, overlap and loop-filtering across slice-boundaries. This permits a slice coded in intra-mode to be reconstructed error-free, irrespective of errors in other regions of the picture.

    Abstract translation: 视频编码器/解码器利用提供可独立解码的部分图像单元的双向串行语法，其可以是包含一个或多个连续的宏块行（称为切片）的单元的形式。 该切片层提供了弹性和压缩效率的灵活组合。 切片层对有效的寻址机制（例如，指定切片层的开始宏块行的语法元素）进行编码，以及有选择地重传图像头信息的机制。 切片层通过禁用跨片段的所有形式的预测，重叠和循环滤波来提供解码和重建独立性。 这允许在帧内编码的片段无错重构，而与图像的其他区域中的错误无关。

    Non-zero coefficient block pattern coding
    9.
    发明授权
    Non-zero coefficient block pattern coding 有权
    非零系数块模式编码

    公开(公告)号：US09077960B2

    公开(公告)日：2015-07-07

    申请号：US11203007

    申请日：2005-08-12

    Applicant: Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan

    Inventor： Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan

    IPC: H04N7/12 ,  H04N19/14 ,  H04N19/132 ,  H04N19/176 ,  H04N19/593 ,  H04N19/46 ,  H04N19/91

    CPC classification number: H04N19/14 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/91

    Abstract: A block transform-based digital media codec efficiently compresses digital media data using block patterns representing whether a block's coefficients are zero-valued, such that their explicit encoding is skipped. Because the block patterns can have widely varying probability distributions, the codec adaptively chooses a prediction mode for modifying the block patterns (e.g., based on spatial prediction, or inverting) to enhance their compression using entropy coding techniques. Further, with high spatial correlation of block patterns, the codec encodes a meta block pattern for a region indicating whether all block patterns of the region represent zero-valued coefficient blocks. In such cases, the codec can then also omit explicitly encoding the block patterns in those regions.

    Abstract translation: 基于块变换的数字媒体编解码器使用表示块的系数是否为零值的块模式来有效地压缩数字媒体数据，使得它们的显式编码被跳过。 由于块图案可以具有广泛变化的概率分布，所以编解码器自适应地选择用于修改块模式的预测模式（例如，基于空间预测或反转），以使用熵编码技术增强其压缩。 此外，随着块模式的高空间相关性，编解码器编码用于指示该区域的所有块模式是否表示零值系数块的区域的元块模式。 在这种情况下，编解码器也可以省略对这些区域中的块模式的明确编码。

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