-
公开(公告)号：US20100046626A1
公开(公告)日：2010-02-25
申请号：US12197124
申请日：2008-08-22
申请人： Chengjie Tu , Shankar Regunathan , Shijun Sun , Chih-Lung Lin
发明人： Chengjie Tu , Shankar Regunathan , Shijun Sun , Chih-Lung Lin
CPC分类号： H04N19/18 , H04N19/13 , H04N19/147 , H04N19/176 , H04N19/61
摘要： Techniques and tools for encoding and decoding data values that are hierarchically organized are presented. For example, an encoder encodes data as a set that has a hierarchy of subsets with set symbols. In the encoding, the encoder evaluates the data values of the set and selectively encodes a symbol combination code that indicates the set symbols of multiple subsets of the set. Then, for each of the multiple subsets considered as a new set, the encoder selectively repeats the evaluating, selective encoding and selective repetition for the new set. In corresponding decoding, a decoder decodes data encoded as a set that has a hierarchy of subsets with set symbols. In some implementations, the encoding and decoding are adaptive and use a symbol alphabet with nested elements.
摘要翻译： 呈现用于编码和解码分层组织的数据值的技术和工具。 例如，编码器将数据编码为具有设置符号的子集层次的集合。 在编码中，编码器对集合的数据值进行评估，并选择性地编码指示集合的多个子集的集合符号的符号组合码。 然后，对于被认为是新集合的多个子集中的每一个，编码器选择性地重复新集合的评估，选择性编码和选择性重复。 在相应的解码中，解码器将编码为具有设定符号的子集层次的集合的数据解码。 在一些实现中，编码和解码是自适应的并且使用具有嵌套元素的符号字母表。
-
公开(公告)号：US20090296808A1
公开(公告)日：2009-12-03
申请号：US12156864
申请日：2008-06-03
申请人： Shankar Regunathan , Shijun Sun , Chengjie Tu , Chih-Lung Lin
发明人： Shankar Regunathan , Shijun Sun , Chengjie Tu , Chih-Lung Lin
IPC分类号： H04N7/26
CPC分类号： H04N19/126 , H04N19/124 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/187 , H04N19/196 , H04N19/197 , H04N19/34 , H04N19/46 , H04N19/463 , H04N19/593 , H04N19/61 , H04N19/70
摘要： Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
摘要翻译： 提出了用于在空间上和/或颜色通道之间变化的具有量化的增强层视频编码的技术和工具，以及相应的解码技术和工具。 例如，编码工具确定量化是否在图像上空间上变化，并且该工具还确定量化是否在图像中的颜色通道之间变化。 该工具在编码比特流中针对图像中的宏块发送量化参数。 在一些实现中，为了发信号通知量化参数，该工具预测量化参数，参考预测量化参数来发信号通知量化参数。 解码工具接收编码比特流，预测量化参数，并使用信号信息确定增强层视频的宏块的量化参数。 解码工具执行在空间上和/或颜色通道之间变化的逆量化。
-
公开(公告)号：US20090238279A1
公开(公告)日：2009-09-24
申请号：US12077768
申请日：2008-03-21
CPC分类号： H04N19/00442 , H04N19/30 , H04N19/34 , H04N19/61 , H04N19/63
摘要： 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.
摘要翻译： 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。
-
公开(公告)号：US08897359B2
公开(公告)日：2014-11-25
申请号：US12156864
申请日：2008-06-03
申请人： Shankar Regunathan , Shijun Sun , Chengjie Tu , Chih-Lung Lin
发明人： Shankar Regunathan , Shijun Sun , Chengjie Tu , Chih-Lung Lin
IPC分类号： H04N7/12 , H04N19/187 , H04N19/61 , H04N19/34 , H04N19/186 , H04N19/196 , H04N19/176 , H04N19/172 , H04N19/463 , H04N19/46 , H04N19/124
CPC分类号： H04N19/126 , H04N19/124 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/187 , H04N19/196 , H04N19/197 , H04N19/34 , H04N19/46 , H04N19/463 , H04N19/593 , H04N19/61 , H04N19/70
摘要： Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
摘要翻译： 提出了用于在空间上和/或颜色通道之间变化的具有量化的增强层视频编码的技术和工具，以及相应的解码技术和工具。 例如，编码工具确定量化是否在图像上空间上变化，并且该工具还确定量化是否在图像中的颜色通道之间变化。 该工具在编码比特流中针对图像中的宏块发送量化参数。 在一些实现中，为了发信号通知量化参数，该工具预测量化参数，参考预测量化参数来发信号通知量化参数。 解码工具接收编码比特流，预测量化参数，并使用信号信息确定增强层视频的宏块的量化参数。 解码工具执行在空间上和/或颜色通道之间变化的逆量化。
-
公开(公告)号：US08369638B2
公开(公告)日：2013-02-05
申请号：US12165474
申请日：2008-06-30
IPC分类号： G06K9/36
CPC分类号： H04N19/00909 , H04N19/122 , H04N19/60 , H04N19/86
摘要： In certain embodiments, to eliminate DC leakage into surrounding AC values, scaling stage within a photo overlap transform operator is modified such that the off-diagonal elements of the associated scaling matrix have the values of 0. In certain embodiments, the on-diagonal scaling matrix are given the values (0.5, 2). In some embodiments, the scaling is performed using a combination of reversible modulo arithmetic and lifting steps. In yet other embodiments, amount of DC leakage is estimated at the encoder, and preprocessing occurs to mitigate amount of leakage, with the bitstream signaling that preprocessing has occurred. A decoder may then read the signal and use the information to mitigate DC leakage.
摘要翻译： 在某些实施例中，为了将DC泄漏消除到周围的AC值中，修改照片重叠变换算子内的缩放阶段，使得相关联的缩放矩阵的非对角元素具有值0.在某些实施例中， 矩阵给出值（0.5,2）。 在一些实施例中，使用可逆模运算和提升步骤的组合来执行缩放。 在其他实施例中，在编码器处估计DC泄漏量，并且发生预处理以减轻泄漏量，同时比特流指示已经发生预处理。 然后，解码器可以读取信号并使用该信息来减轻DC泄漏。
-
公开(公告)号：US20090297054A1
公开(公告)日：2009-12-03
申请号：US12165474
申请日：2008-06-30
IPC分类号： G06K9/36
CPC分类号： H04N19/00909 , H04N19/122 , H04N19/60 , H04N19/86
摘要： In certain embodiments, to eliminate DC leakage into surrounding AC values, scaling stage within a photo overlap transform operator is modified such that the off-diagonal elements of the associated scaling matrix have the values of 0. In certain embodiments, the on-diagonal scaling matrix are given the values (0.5, 2). In some embodiments, the scaling is performed using a combination of reversible modulo arithmetic and lifting steps. In yet other embodiments, amount of DC leakage is estimated at the encoder, and preprocessing occurs to mitigate amount of leakage, with the bitstream signaling that preprocessing has occurred. A decoder may then read the signal and use the information to mitigate DC leakage.
摘要翻译： 在某些实施例中，为了将DC泄漏消除到周围的AC值中，修改照片重叠变换算子内的缩放阶段，使得相关联的缩放矩阵的非对角元素具有值0.在某些实施例中， 矩阵给出值（0.5,2）。 在一些实施例中，使用可逆模运算和提升步骤的组合来执行缩放。 在其他实施例中，在编码器处估计DC泄漏量，并且发生预处理以减轻泄漏量，同时比特流指示已经发生预处理。 然后，解码器可以读取信号并使用该信息来减轻DC泄漏。
-
17.发明申请Scalable video coding and decoding with sample bit depth and chroma high-pass residual layers 有权具有采样位深度和色度高通残余层的可扩展视频编码和解码公开(公告)号：US20090219994A1
公开(公告)日：2009-09-03
申请号：US12074030
申请日：2008-02-29
IPC分类号： H04N7/26
CPC分类号： H04N19/00315 , H04N19/186 , H04N19/33 , H04N19/36 , H04N19/59
摘要： Techniques and tools are described for scalable video encoding and decoding. In some embodiments, an input frame is downsampled in terms of sample depth and chroma sampling rate, encoded, and output from the encoder as a base layer bitstream. The base layer bitstream is also reconstructed and upsampled to produce a reconstructed bitstream which is subtracted from the original input frame to produce a residual layer. The residual layer is split and encoded as a sample depth residual layer bitstream and a chroma high-pass residual layer bitstream. To recover the encoded input frame, a decoder receives one or more of these bitstreams, decodes them, and combines them to form a reconstructed image. The use of separate codecs is allowed for the base layer and the enhancement layers, without inter-layer dependencies.
摘要翻译： 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，输入帧根据样本深度和色度采样率进行下采样，编码并从编码器输出作为基本层比特流。 基层比特流也被重建并上采样以产生从原始输入帧中减去的重构比特流，以产生残余层。 残余层被分割并编码为采样深度残留层比特流和色度高通残留层比特流。 为了恢复编码的输入帧，解码器接收这些比特流中的一个或多个，对它们进行解码，并将它们组合以形成重构的图像。 对于基本层和增强层，允许使用单独的编解码器，而不需要层间依赖。
-
18.发明授权公开(公告)号：US08953673B2
公开(公告)日：2015-02-10
申请号：US12074030
申请日：2008-02-29
IPC分类号： H04N7/12 , H04N19/186 , H04N19/36 , H04N19/59 , H04N19/33
CPC分类号： H04N19/00315 , H04N19/186 , H04N19/33 , H04N19/36 , H04N19/59
摘要： Techniques and tools are described for scalable video encoding and decoding. In some embodiments, an input frame is downsampled in terms of sample depth and chroma sampling rate, encoded, and output from the encoder as a base layer bitstream. The base layer bitstream is also reconstructed and upsampled to produce a reconstructed bitstream which is subtracted from the original input frame to produce a residual layer. The residual layer is split and encoded as a sample depth residual layer bitstream and a chroma high-pass residual layer bitstream. To recover the encoded input frame, a decoder receives one or more of these bitstreams, decodes them, and combines them to form a reconstructed image. The use of separate codecs is allowed for the base layer and the enhancement layers, without inter-layer dependencies.
-
公开(公告)号：US09077960B2
公开(公告)日：2015-07-07
申请号：US11203007
申请日：2005-08-12
IPC分类号： H04N7/12 , H04N19/14 , H04N19/132 , H04N19/176 , H04N19/593 , H04N19/46 , H04N19/91
CPC分类号： H04N19/14 , H04N19/132 , H04N19/176 , H04N19/46 , H04N19/593 , H04N19/91
摘要： 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.
摘要翻译： 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。
-
公开(公告)号：US08054886B2
公开(公告)日：2011-11-08
申请号：US11772070
申请日：2007-06-29
CPC分类号： H04N19/186 , H04N19/46 , H04N19/63 , H04N19/70
摘要： Rules for the signaling and interpretation of chroma position are described. One rule, called the short rule, defines fifteen discrete chroma centering positions and corresponding four-bit syntax element. Another rule, called the extended rule, defines 81 discrete chroma centering positions and corresponding seven-bit syntax elements. A described method includes receiving digital media data at a digital media encoder, determining chroma position information for the received digital media data, and representing the chroma position information with one or more syntax elements in an encoded bitstream. The one or more syntax elements are operable to communicate the chroma position information to a digital media decoder. The chroma position information facilitates an image rotation or flip.
摘要翻译： 描述色度位置信号和解释规则。 称为短规则的一个规则定义了十五个离散色度对中位置和相应的四位语法元素。 称为扩展规则的另一个规则定义了81个离散色度对中位置和相应的七位语法元素。 所描述的方法包括在数字媒体编码器处接收数字媒体数据，确定接收到的数字媒体数据的色度位置信息，并用编码比特流中的一个或多个语法元素表示色度位置信息。 一个或多个语法元素可操作以将色度位置信息传送到数字媒体解码器。 色度位置信息有助于图像旋转或翻转。
-
-
-
-
-
-
-
-
-
搜索结果
46 条记录 (耗时 0.026 秒)
