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    Compressing image data
    1.
    发明授权
    Compressing image data 有权
    压缩图像数据

    公开(公告)号：US08768082B2

    公开(公告)日：2014-07-01

    申请号：US13166423

    申请日：2011-06-22

    申请人： Dake He ,  Xiang Yu ,  Jing Wang

    发明人： Dake He ,  Xiang Yu ,  Jing Wang

    IPC分类号： G06K9/36

    CPC分类号： H04N19/126 ,  H04N19/105 ,  H04N19/176 ,  H04N19/30 ,  H04N19/463 ,  H04N19/593 ,  H04N19/91

    摘要： Methods, systems, and computer programs for encoding and decoding image are described. In some aspects, an input data block and a prediction data block are accessed. A projection factor is generated based on a projection of the input data block onto the prediction data block. A scaled prediction data block is generated by multiplying the projection factor by the prediction data block. A residual data block is generated based on a difference between the input data block and the scaled prediction data block. In some aspects, a prediction data block, a residual data block, and a projection factor associated with the residual data block are accessed. A scaled prediction data block is generated by multiplying the projection factor by the prediction data block. An output data block is generated by summing the residual data block and the scaled prediction data block.

    摘要翻译： 描述用于编码和解码图像的方法，系统和计算机程序。 在一些方面，访问输入数据块和预测数据块。 基于将输入数据块投影到预测数据块上而生成投影因子。 通过将投影因子乘以预测数据块来生成缩放预测数据块。 基于输入数据块和缩放预测数据块之间的差异生成残留数据块。 在一些方面，访问与残留数据块相关联的预测数据块，残差数据块和投影因子。 通过将投影因子乘以预测数据块来生成缩放预测数据块。 通过对残差数据块和缩放预测数据块求和来生成输出数据块。

    Methods and devices for coding and decoding the position of the last significant coefficient
    2.
    发明授权
    Methods and devices for coding and decoding the position of the last significant coefficient 有权
    用于对最后一个有效系数的位置进行编码和解码的方法和装置

    公开(公告)号：US08446301B2

    公开(公告)日：2013-05-21

    申请号：US13087462

    申请日：2011-04-15

    申请人： Dake He ,  Jing Wang

    发明人： Dake He ,  Jing Wang

    IPC分类号： H03M7/00

    CPC分类号： H03M7/40 ,  H03M7/3075 ,  H03M7/3079

    摘要： Methods and devices are described for entropy coding data using an entropy coder to encode quantized transform domain coefficient data. Last significant coefficient information is signaled in the bitstream using two-dimensional coordinates for the last significant coefficient. The context for bins of one of the coordinates is based, in part, upon the value of the other of the coordinates. In one case, instead of signaling last significant coefficient information, the number of non-zero coefficients is binarized and entropy encoded.

    摘要翻译： 描述了使用熵编码器对数据进行熵编码以对量化的变换域系数数据进行编码的方法和装置。 在比特流中用最后一个有效系数的二维坐标来表示最后一个有效系数信息。 坐标之一的仓的上下文部分地基于另一坐标的值。 在一种情况下，代替信令最后一个有效系数信息，非零系数的数量被二进制化并进行熵编码。

    METHODS AND DEVICES FOR DATA COMPRESSION USING OFFSET-BASED ADAPTIVE RECONSTRUCTION LEVELS
    3.
    发明申请
    METHODS AND DEVICES FOR DATA COMPRESSION USING OFFSET-BASED ADAPTIVE RECONSTRUCTION LEVELS 有权
    使用基于偏移的自适应重建级别进行数据压缩的方法和设备

    公开(公告)号：US20120219055A1

    公开(公告)日：2012-08-30

    申请号：US13155616

    申请日：2011-06-08

    申请人： Dake He ,  Xiang Yu ,  Jing Wang ,  En-hui Yang

    发明人： Dake He ,  Xiang Yu ,  Jing Wang ,  En-hui Yang

    IPC分类号： H04N7/26

    CPC分类号： H04N19/124 ,  H04N19/147 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/177 ,  H04N19/192 ,  H04N19/194 ,  H04N19/196 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70

    摘要： Encoding and decoding methods are presented that used offset-based adaptive reconstruction levels. The offset data is inserted in the bitstream with the encoded video data. The offset data may be differential data and may be an index to an array of offset values from which the differential offset is calculated by the decoder. The offset to an adaptive reconstruction level may be adjusted for each slice. The offsets may be specific to a particular level/index and data type. In some cases, offsets may only be sent for a subset of the levels. Higher levels may apply no offset, may apply an average offset, or may apply the offset used for the highest level having a level-specific offset.

    摘要翻译： 提出了使用基于偏移的自适应重建级别的编码和解码方法。 偏移数据被插入到具有编码视频数据的比特流中。 偏移数据可以是差分数据，并且可以是由解码器计算差分偏移的偏移值的阵列的索引。 可以针对每个切片调整对自适应重建级别的偏移。 偏移量可能特定于特定级别/索引和数据类型。 在某些情况下，只能为子集的级别发送偏移量。 较高的等级可以不应用偏移量，可以应用平均偏移量，或者可以应用用于具有水平特定偏移的最高级别的偏移量。

    MODIFIED CODING FOR TRANSFORM SKIPPING
    5.
    发明申请
    MODIFIED CODING FOR TRANSFORM SKIPPING 审中-公开
    变形滑行改造编码

    公开(公告)号：US20130343448A1

    公开(公告)日：2013-12-26

    申请号：US13533337

    申请日：2012-06-26

    申请人： Dake He ,  Jing Wang ,  Gaëlle Christine Martin Cocher

    发明人： Dake He ,  Jing Wang ,  Gaëlle Christine Martin Cocher

    IPC分类号： H04N7/26

    CPC分类号： H04N19/157 ,  H04N19/122 ,  H04N19/136 ,  H04N19/176

    摘要： Methods and devices for modified coding of blocks of residuals in the case of transform skipping. To better align the data with assumptions upon which the entropy coding scheme is based, the block of residual data is permuted at the encoder prior to entropy coding. The block of reconstructed data is then inverse permuted at the decoder to recover the reconstructed block of residuals. The permutation may include 180 rotation of the block, which may be of particular benefit in the case of intra-coded residuals.

    摘要翻译： 在转换跳跃的情况下修改残差块编码的方法和装置。 为了使数据与熵编码方案所基于的假设更好地对齐，在熵编码之前，残留数据块在编码器处被置换。 然后，重构数据块在解码器处被逆置换以恢复重建的残差块。 排列可以包括块的180次旋转，这在帧内编码残差的情况下可能是特别有益的。

    Methods and devices for data compression using offset-based adaptive reconstruction levels
    7.
    发明授权
    Methods and devices for data compression using offset-based adaptive reconstruction levels 有权
    使用基于偏移的自适应重建级别进行数据压缩的方法和装置

    公开(公告)号：US08780972B2

    公开(公告)日：2014-07-15

    申请号：US13155616

    申请日：2011-06-08

    申请人： Dake He ,  Xiang Yu ,  Jing Wang ,  En-hui Yang

    发明人： Dake He ,  Xiang Yu ,  Jing Wang ,  En-hui Yang

    IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N7/26 ,  H04N7/50

    CPC分类号： H04N19/124 ,  H04N19/147 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/177 ,  H04N19/192 ,  H04N19/194 ,  H04N19/196 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70

    摘要： Encoding and decoding methods are presented that used offset-based adaptive reconstruction levels. The offset data is inserted in the bitstream with the encoded video data. The offset data may be differential data and may be an index to an array of offset values from which the differential offset is calculated by the decoder. The offset to an adaptive reconstruction level may be adjusted for each slice. The offsets may be specific to a particular level/index and data type. In some cases, offsets may only be sent for a subset of the levels. Higher levels may apply no offset, may apply an average offset, or may apply the offset used for the highest level having a level-specific offset.

    摘要翻译： 提出了使用基于偏移的自适应重建级别的编码和解码方法。 偏移数据被插入到具有编码视频数据的比特流中。 偏移数据可以是差分数据，并且可以是由解码器计算差分偏移的偏移值的阵列的索引。 可以针对每个切片调整对自适应重建级别的偏移。 偏移量可能特定于特定级别/索引和数据类型。 在某些情况下，只能为子集的级别发送偏移量。 较高的等级可以不应用偏移量，可以应用平均偏移量，或者可以应用用于具有水平特定偏移量的最高级别的偏移量。

    COMPRESSING IMAGE DATA
    8.
    发明申请
    COMPRESSING IMAGE DATA 有权

    公开(公告)号：US20120328001A1

    公开(公告)日：2012-12-27

    申请号：US13166482

    申请日：2011-06-22

    申请人： Dake He ,  Xiang Yu ,  Jing Wang

    发明人： Dake He ,  Xiang Yu ,  Jing Wang

    IPC分类号： H04N7/26

    CPC分类号： H04N11/02 ,  H04N19/00 ,  H04N19/105 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/187 ,  H04N19/503 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70

    摘要： Methods, systems, and computer programs for encoding and decoding image are described. In some aspects, an input data block and a prediction data block are accessed. A projection factor is generated based on a projection of the input data block onto the prediction data block. A scaled prediction data block is generated by multiplying the projection factor by the prediction data block. A residual data block is generated based on a difference between the input data block and the scaled prediction data block. In some aspects, a prediction data block, a residual data block, and a projection factor associated with the residual data block are accessed. A scaled prediction data block is generated by multiplying the projection factor by the prediction data block. An output data block is generated by summing the residual data block and the scaled prediction data block.

    Multiple sign bit hiding within a transform unit
    10.
    发明授权
    Multiple sign bit hiding within a transform unit 有权
    多符号位隐藏在变换单元内

    公开(公告)号：US09008184B2

    公开(公告)日：2015-04-14

    申请号：US13354465

    申请日：2012-01-20

    申请人： Jing Wang ,  Xiang Yu ,  Dake He

    发明人： Jing Wang ,  Xiang Yu ,  Dake He

    IPC分类号： H04N7/30 ,  H04N11/02 ,  H04N11/04 ,  H04N5/917

    CPC分类号： H04N19/625 ,  H04N11/02 ,  H04N11/04 ,  H04N19/129 ,  H04N19/176 ,  H04N19/40 ,  H04N19/51 ,  H04N19/593

    摘要： Methods of encoding and decoding for video data are described for encoding or decoding coefficients for a transform unit. In particular, the sign bits for the non-zero coefficients are encoded using sign bit hiding. Two or more sets of coefficients are defined for the transform unit and a sign bit may be hidden for each set, subject to satisfaction of a threshold test. The sets may correspond to coefficient groups that are otherwise used in multi-level significance map encoding and decoding.

    摘要翻译： 描述了用于视频数据的编码和解码的方法，用于对变换单元的系数进行编码或解码。 特别地，非零系数的符号位用符号位隐藏进行编码。 为变换单元定义了两个或多个系数集合，并且对于每个集合可以隐藏符号位，在满足阈值测试的情况下。 这些集合可以对应于否则在多级重要性映射编码和解码中使用的系数组。