Multi-level representation of reordered transform coefficients
    31.
    发明授权
    Multi-level representation of reordered transform coefficients 有权
    重排序变换系数的多级表示

    公开(公告)号:US08179974B2

    公开(公告)日:2012-05-15

    申请号:US12151069

    申请日:2008-05-02

    IPC分类号: H04B1/66

    摘要: Techniques and tools for encoding and decoding a block of frequency coefficients are presented. An encoder selects a scan order from multiple available scan orders and then applies the selected scan order to a two-dimensional matrix of transform coefficients, grouping non-zero values of the frequency coefficients together in a one-dimensional string. The encoder entropy encodes the one-dimensional string of coefficient values according to a multi-level nested set representation. In decoding, a decoder entropy decodes the one-dimensional string of coefficient values from the multi-level nested set representation. The decoder selects the scan order from among multiple available scan orders and then reorders the coefficients back into a two-dimensional matrix using the selected scan order.

    摘要翻译: 提出了用于编码和解码频率系数块的技术和工具。 编码器从多个可用扫描顺序中选择扫描顺序,然后将所选择的扫描顺序应用于变换系数的二维矩阵,将频率系数的非零值在一维串中分组。 编码器根据多级嵌套集合表示对一维系列值串进行编码。 在解码中,解码器熵从多级嵌套集合表示解码系数值的一维串。 解码器从多个可用扫描顺序中选择扫描顺序,然后使用所选择的扫描顺序将系数重新排序成二维矩阵。

    Multi-level representation of reordered transform coefficients
    32.
    发明申请
    Multi-level representation of reordered transform coefficients 有权
    重排序变换系数的多级表示

    公开(公告)号:US20090273706A1

    公开(公告)日:2009-11-05

    申请号:US12151069

    申请日:2008-05-02

    IPC分类号: H04N1/415

    摘要: Techniques and tools for encoding and decoding a block of frequency coefficients are presented. An encoder selects a scan order from multiple available scan orders and then applies the selected scan order to a two-dimensional matrix of transform coefficients, grouping non-zero values of the frequency coefficients together in a one-dimensional string. The encoder entropy encodes the one-dimensional string of coefficient values according to a multi-level nested set representation. In decoding, a decoder entropy decodes the one-dimensional string of coefficient values from the multi-level nested set representation. The decoder selects the scan order from among multiple available scan orders and then reorders the coefficients back into a two-dimensional matrix using the selected scan order.

    摘要翻译: 提出了用于编码和解码频率系数块的技术和工具。 编码器从多个可用扫描顺序中选择扫描顺序,然后将所选择的扫描顺序应用于变换系数的二维矩阵,将频率系数的非零值在一维串中分组。 编码器根据多级嵌套集合表示对一维系列值串进行编码。 在解码中,解码器熵从多级嵌套集合表示解码系数值的一维串。 解码器从多个可用扫描顺序中选择扫描顺序,然后使用所选择的扫描顺序将系数重新排序成二维矩阵。

    Entropy coding/decoding of hierarchically organized data
    34.
    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
    35.
    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
    36.
    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。

    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
    39.
    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。