Entropy coding/decoding of hierarchically organized data
    31.
    发明授权
    Entropy coding/decoding of hierarchically organized data 有权
    分层组织数据的熵编码/解码

    公开(公告)号:US08406307B2

    公开(公告)日:2013-03-26

    申请号:US12197124

    申请日:2008-08-22

    IPC分类号: H04N7/12 H03M7/40

    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。

    ENTROPY CODING/DECODING OF HIERARCHICALLY ORGANIZED DATA
    34.
    发明申请
    ENTROPY CODING/DECODING OF HIERARCHICALLY ORGANIZED DATA 有权
    熵编码/解码等级组织数据

    公开(公告)号:US20100046626A1

    公开(公告)日:2010-02-25

    申请号:US12197124

    申请日:2008-08-22

    IPC分类号: H04N7/30 H04N7/26

    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。

    Adaptive quantization for enhancement layer video coding
    35.
    发明申请
    Adaptive quantization for enhancement layer video coding 有权
    增强层视频编码的自适应量化

    公开(公告)号:US20090296808A1

    公开(公告)日:2009-12-03

    申请号:US12156864

    申请日:2008-06-03

    IPC分类号: H04N7/26

    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。

    Motion-compensated prediction of inter-layer residuals
    36.
    发明申请
    Motion-compensated prediction of inter-layer residuals 有权
    层间残差运动补偿预测

    公开(公告)号:US20090238279A1

    公开(公告)日:2009-09-24

    申请号:US12077768

    申请日:2008-03-21

    IPC分类号: H04N7/34 H04N7/26

    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。

    Estimating sample-domain distortion in the transform domain with rounding compensation
    37.
    发明申请
    Estimating sample-domain distortion in the transform domain with rounding compensation 有权
    使用舍入补偿估计变换域中的样本域失真

    公开(公告)号:US20070237236A1

    公开(公告)日:2007-10-11

    申请号:US11400719

    申请日:2006-04-07

    IPC分类号: H04N11/04 H04B1/66

    摘要: Techniques and tools are described for compensating for rounding when estimating sample-domain distortion in the transform domain. For example, a video encoder estimates pixel-domain distortion in the transform domain for a block of transform coefficients after compensating for rounding in the DC coefficient of the block. In this way, the video encoder improves the accuracy of pixel-domain distortion estimation but retains the computational advantages of performing the estimation in the transform domain. Rounding compensation includes, for example, looking up an index (from a de-quantized transform coefficient) in a rounding offset table to determine a rounding offset, then adjusting the coefficient by the offset. Other techniques and tools described herein are directed to creating rounding offset tables and encoders that make encoding decisions after considering rounding effects that occur after an inverse frequency transform on de-quantized transform coefficient values.

    摘要翻译: 描述了在估计变换域中的样本域失真时补偿舍入的技术和工具。 例如,视频编码器在补偿块的DC系数中的舍入后估计变换系数块的变换域中的像素域失真。 以这种方式,视频编码器提高了像素域失真估计的精度,但保留了在变换域中执行估计的计算优点。 舍入补偿包括例如在舍入偏移表中查找索引(来自去量化的变换系数)以确定舍入偏移,然后将系数调整为偏移。 本文描述的其他技术和工具旨在创建舍入偏移表和编码器,其在考虑在对于量化后的变换系数值进行逆频率变换之后出现的舍入效应时进行编码决定。

    Adaptive quantization for enhancement layer video coding
    38.
    发明授权
    Adaptive quantization for enhancement layer video coding 有权
    增强层视频编码的自适应量化

    公开(公告)号:US08897359B2

    公开(公告)日:2014-11-25

    申请号:US12156864

    申请日:2008-06-03

    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。

    DC COEFFICIENT SIGNALING AT SMALL QUANTIZATION STEP SIZES
    39.
    发明申请
    DC COEFFICIENT SIGNALING AT SMALL QUANTIZATION STEP SIZES 有权
    直流系数小信号步进尺寸信号

    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

    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。

    Signaling coding and display options in entry point headers
    40.
    发明申请
    Signaling coding and display options in entry point headers 有权
    入口点标题中的信号编码和显示选项

    公开(公告)号:US20050123274A1

    公开(公告)日:2005-06-09

    申请号:US10989845

    申请日:2004-11-15

    IPC分类号: G11C7/00 H04N5/783 H04N7/12

    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。