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公开(公告)号:US20050063471A1
公开(公告)日:2005-03-24
申请号:US10989702
申请日:2004-11-15
CPC分类号: H04N19/00145 , H04N19/137 , H04N19/16 , H04N19/196 , H04N19/46 , H04N19/51 , H04N19/61 , H04N19/70
摘要: 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.
摘要翻译: 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。
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公开(公告)号:US20050052294A1
公开(公告)日:2005-03-10
申请号:US10826971
申请日:2004-04-15
IPC分类号: G06K9/36 , H03M7/40 , H03M7/46 , H04N7/12 , H04N7/26 , H04N7/30 , H04N7/34 , H04N7/36 , H04N7/50
CPC分类号: H04N19/93 , H04N19/102 , H04N19/109 , H04N19/11 , H04N19/112 , H04N19/117 , H04N19/129 , H04N19/13 , 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
摘要: Entropy coding and decoding techniques are described, which may be implemented separately or in combination. For example, a video encoder uses two-layer run level coding to reduce bitrate for frequency transform coefficients in a quick and efficient manner, and a video decoder uses corresponding two-layer run level decoding. This two-layer coding/decoding can be generalized to more than two layers of run level coding/decoding. The video encoder and decoder exploit common patterns in run level information to reduce code table size and create opportunities for early termination of decoding. Using zoned Huffman code tables helps limit overall table size while still providing a level of adaptivity in encoding and decoding. Using embedded Huffman code tables allows the encoder and decoder to reuse codes for 8×8, 8×4, 4×8, and 4×4 blocks.
摘要翻译: 描述了熵编码和解码技术,其可以单独地或组合地实现。 例如,视频编码器使用双层运行级编码以快速且有效的方式降低频率变换系数的比特率,并且视频解码器使用对应的双层运行级解码。 这种双层编码/解码可以推广到两层以上的运行级编码/解码。 视频编码器和解码器利用运行级信息中的常见模式来减少代码表大小,并为解码提早终止创造机会。 使用分区霍夫曼代码表有助于限制整体表格大小,同时在编码和解码中仍然提供一定程度的适应性。 使用嵌入式霍夫曼代码表,编码器和解码器可以重用8x8,8x4,4x8和4x4块的代码。
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公开(公告)号:US20050041738A1
公开(公告)日:2005-02-24
申请号:US10893168
申请日:2004-07-17
CPC分类号: H04N19/18 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/137 , H04N19/17 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/46 , H04N19/61 , H04N19/625 , H04N19/70 , H04N19/91
摘要: Described tools and techniques relate to signaling for DC coefficients at small quantization step sizes. The techniques and tools can be used in combination or independently. For example, a tool such as a video encoder or decoder processes a VLC that indicates a DC differential for a DC coefficient, a FLC that indicates a value refinement for the DC differential, and a third code that indicates the sign for the DC differential. Even with the small quantization step sizes, the tool uses a VLC table with DC differentials for DC coefficients above the small quantization step sizes. The FLCs for DC differentials have lengths that vary depending on quantization step size.
摘要翻译: 描述的工具和技术涉及在小量化步长下用于DC系数的信令。 技术和工具可以组合使用或独立使用。 例如,诸如视频编码器或解码器的工具处理指示DC系数的DC差分的VLC,指示DC差分的值细化的FLC以及指示DC差分的符号的第三代码。 即使使用较小的量化步长,该工具也会使用具有DC系数的直流差分的VLC表,其高于小量化步长。 用于DC差分的FLC具有随量化步长变化的长度。
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公开(公告)号:US09313509B2
公开(公告)日:2016-04-12
申请号:US12815029
申请日:2010-06-14
IPC分类号: H04N7/12 , H04N11/02 , H04N11/04 , H04N19/17 , H04N19/176 , H04N19/70 , H04N19/46 , H04N19/61 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/137 , H04N19/18
CPC分类号: H04N19/18 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/137 , H04N19/17 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/46 , H04N19/61 , H04N19/625 , H04N19/70 , H04N19/91
摘要: Described tools and techniques relate to signaling for DC coefficients at small quantization step sizes. The techniques and tools can be used in combination or independently. For example, a tool such as a video encoder or decoder processes a VLC that indicates a DC differential for a DC coefficient, a FLC that indicates a value refinement for the DC differential, and a third code that indicates the sign for the DC differential. Even with the small quantization step sizes, the tool uses a VLC table with DC differentials for DC coefficients above the small quantization step sizes. The FLCs for DC differentials have lengths that vary depending on quantization step size.
摘要翻译: 描述的工具和技术涉及在小量化步长下用于DC系数的信令。 技术和工具可以组合使用或独立使用。 例如,诸如视频编码器或解码器的工具处理指示DC系数的DC差分的VLC,指示DC差分的值细化的FLC以及指示DC差分的符号的第三代码。 即使使用较小的量化步长,该工具也会使用具有DC系数的直流差分的VLC表,其高于小量化步长。 用于DC差分的FLC具有随量化步长变化的长度。
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公开(公告)号:US08855202B2
公开(公告)日:2014-10-07
申请号:US13191335
申请日:2011-07-26
IPC分类号: H04N7/12 , H04N19/46 , H04N19/137 , H04N19/51 , H04N19/196 , H04N19/16 , H04N19/61 , H04N19/70
CPC分类号: H04N19/00145 , H04N19/137 , H04N19/16 , H04N19/196 , H04N19/46 , H04N19/51 , H04N19/61 , H04N19/70
摘要: 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.
摘要翻译: 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。
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公开(公告)号:US08711948B2
公开(公告)日:2014-04-29
申请号:US12077768
申请日:2008-03-21
IPC分类号: H04N7/12
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。
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公开(公告)号:US20110280303A1
公开(公告)日:2011-11-17
申请号:US13191335
申请日:2011-07-26
CPC分类号: H04N19/00145 , H04N19/137 , H04N19/16 , H04N19/196 , H04N19/46 , H04N19/51 , H04N19/61 , H04N19/70
摘要: 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.
摘要翻译: 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。
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公开(公告)号:US08014450B2
公开(公告)日:2011-09-06
申请号:US10989702
申请日:2004-11-15
IPC分类号: H04N7/12
CPC分类号: H04N19/00145 , H04N19/137 , H04N19/16 , H04N19/196 , H04N19/46 , H04N19/51 , H04N19/61 , H04N19/70
摘要: 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.
摘要翻译: 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。
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公开(公告)号:US20100246671A1
公开(公告)日:2010-09-30
申请号:US12815029
申请日:2010-06-14
IPC分类号: H04N7/26
CPC分类号: H04N19/18 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/137 , H04N19/17 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/46 , H04N19/61 , H04N19/625 , H04N19/70 , H04N19/91
摘要: Described tools and techniques relate to signaling for DC coefficients at small quantization step sizes. The techniques and tools can be used in combination or independently. For example, a tool such as a video encoder or decoder processes a VLC that indicates a DC differential for a DC coefficient, a FLC that indicates a value refinement for the DC differential, and a third code that indicates the sign for the DC differential. Even with the small quantization step sizes, the tool uses a VLC table with DC differentials for DC coefficients above the small quantization step sizes. The FLCs for DC differentials have lengths that vary depending on quantization step size.
摘要翻译: 描述的工具和技术涉及在小量化步长下用于DC系数的信令。 技术和工具可以组合使用或独立使用。 例如,诸如视频编码器或解码器的工具处理指示DC系数的DC差分的VLC,指示DC差分的值细化的FLC以及指示DC差分的符号的第三代码。 即使使用较小的量化步长,该工具也会使用具有DC系数的直流差分的VLC表,其高于小量化步长。 用于DC差分的FLC具有随量化步长变化的长度。
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公开(公告)号:US20050078754A1
公开(公告)日:2005-04-14
申请号:US10989844
申请日:2004-11-15
申请人: Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas Holcomb
发明人: Jie Liang , Chih-Lung Lin , Sridhar Srinivasan , Thomas Holcomb
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,该块是8×4,并且扫描模式通过从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。
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