公开(公告)号：US09172953B2

公开(公告)日：2015-10-27

申请号：US14299961

申请日：2014-06-09

申请人： BlackBerry Limited

发明人： Dake He ,  Xiang Yu ,  Jing Wang

IPC分类号： G06K9/36 ,  H04N19/126 ,  H04N19/105 ,  H04N19/176 ,  H04N19/30 ,  H04N19/593 ,  H04N19/463 ,  H04N19/91

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。

公开(公告)号：US09578347B2

公开(公告)日：2017-02-21

申请号：US15050625

申请日：2016-02-23

申请人： Blackberry Limited

发明人： Dake He ,  Jing Wang ,  Xiang Yu

IPC分类号： H04N7/18 ,  H04N19/44 ,  H04N19/463 ,  H04N19/91 ,  H04N19/48 ,  H04N19/467

CPC分类号： H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/463 ,  H04N19/467 ,  H04N19/48 ,  H04N19/91

摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Sign bits are hidden in the parity of partially overlapping subsets of a set of coefficients. This enables the hiding of multiple sign bits per coefficient group. Other information bits may be hidden instead of sign bits in some cases.

摘要翻译： 用于从变换单元中的系数组的编码视频数据的比特流重建系数级的方法和装置。 符号位隐藏在一组系数的部分重叠子集的奇偶校验中。 这使得能够隐藏每个系数组的多个符号位。 在某些情况下，其他信息位可能被隐藏而不是符号位。

公开(公告)号：US20140376622A1

公开(公告)日：2014-12-25

申请号：US14479836

申请日：2014-09-08

申请人： BLACKBERRY LIMITED

发明人： Xiang Yu ,  Dake He ,  Jing Wang

IPC分类号： H04N19/147 ,  H04N19/625 ,  H04N19/186 ,  H04N19/196 ,  H04N19/126 ,  H04N19/154

CPC分类号： H04N19/154 ,  H04N19/126 ,  H04N19/14 ,  H04N19/147 ,  H04N19/186 ,  H04N19/197 ,  H04N19/463 ,  H04N19/625 ,  H04N19/70

摘要： An encoding method for encoding video data by adjusting a quantization parameter, the video data being partitioned into blocks comprising sets of quantized transform coefficients. The method includes, for a set of quantized transform coefficients corresponding to one of the blocks, collecting statistics, wherein the statistics comprise the number of quantized transform coefficients and the sum of the non-rounded quantization value of the quantized transform coefficients in the set. The method also includes deriving a step size based on the statistics, mapping the derived step size to a closest quantization parameter value, and quantizing a next block using the mapped quantization parameter value.

摘要翻译： 一种编码方法，用于通过调整量化参数对视频数据进行编码，所述视频数据被划分成包括量化变换系数集合的块。 该方法包括对于与块中的一个对应的一组量化变换系数的收集统计量，其中统计量包括量化变换系数的数量以及集合中的量化变换系数的非舍入量化值之和。 该方法还包括基于统计量导出步长，将导出的步长映射到最接近的量化参数值，以及使用映射的量化参数值量化下一个块。

公开(公告)号：US09906802B2

公开(公告)日：2018-02-27

申请号：US15408790

申请日：2017-01-18

申请人： BlackBerry Limited

发明人： Dake He ,  Jing Wang ,  Xiang Yu

IPC分类号： H04N7/18 ,  H04N19/18 ,  H04N19/44 ,  H04N19/467 ,  H04N19/91 ,  H04N19/184

CPC分类号： H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/463 ,  H04N19/467 ,  H04N19/48 ,  H04N19/91

摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Sign bits are hidden in the parity of partially overlapping subsets of a set of coefficients. This enables the hiding of multiple sign bits per coefficient group. Other information bits may be hidden instead of sign bits in some cases.

公开(公告)号：US09769449B2

公开(公告)日：2017-09-19

申请号：US14463368

申请日：2014-08-19

申请人： BlackBerry Limited

发明人： Dake He ,  Xiang Yu ,  Jing Wang

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

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.

公开(公告)号：US09282329B2

公开(公告)日：2016-03-08

申请号：US14315877

申请日：2014-06-26

申请人： BLACKBERRY LIMITED

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

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

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。 可以针对每个切片来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。

公开(公告)号：US09264722B2

公开(公告)日：2016-02-16

申请号：US14583947

申请日：2014-12-29

申请人： BlackBerry Limited

发明人： Jing Wang ,  Xiang Yu ,  Dake He ,  Steven Wayne Campbell

IPC分类号： G06K9/36 ,  H04N19/117 ,  G06T9/00 ,  H04N19/19 ,  H04N19/82 ,  H04N19/625 ,  H04N19/50 ,  H04N19/60

CPC分类号： H04N19/117 ,  G06T9/004 ,  H04N19/19 ,  H04N19/50 ,  H04N19/60 ,  H04N19/625 ,  H04N19/82

摘要： Methods and devices for encoding and decoding data using transform domain filtering are described. The encoder determines a set of transform domain filter coefficients to be applied to a transform domain prediction. The filtering may, in some cases, also apply to transform domain reconstructions. Rate-distortion optimization may be used to determine the optimal filter coefficients on a frame-basis, coding-unit-basis, or other basis. Multiple filters may be developed and communicated from the encoder to the decoder for different combinations of transform block size, coding mode, prediction mode, and texture type. In other cases, the filtering is applied in the pixel-domain to a pixel-domain prediction or a pixel-domain reconstruction of a block of samples.

公开(公告)号：US20140355674A1

公开(公告)日：2014-12-04

申请号：US14463368

申请日：2014-08-19

申请人： BlackBerry Limited

发明人： Dake He ,  Xiang Yu ,  Jing Wang

IPC分类号： H04N19/124 ,  H04N19/593 ,  H04N19/187 ,  H04N19/503 ,  H04N19/13

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.

公开(公告)号：US10178391B2

公开(公告)日：2019-01-08

申请号：US14479836

申请日：2014-09-08

申请人： BLACKBERRY LIMITED

发明人： Xiang Yu ,  Dake He ,  Jing Wang

IPC分类号： H04N19/154 ,  H04N19/196 ,  H04N19/70 ,  H04N19/147 ,  H04N19/463 ,  H04N19/126 ,  H04N19/14 ,  H04N19/186 ,  H04N19/625

摘要： An encoding method for encoding video data by adjusting a quantization parameter, the video data being partitioned into blocks comprising sets of quantized transform coefficients. The method includes, for a set of quantized transform coefficients corresponding to one of the blocks, collecting statistics, wherein the statistics comprise the number of quantized transform coefficients and the sum of the non-rounded quantization value of the quantized transform coefficients in the set. The method also includes deriving a step size based on the statistics, mapping the derived step size to a closest quantization parameter value, and quantizing a next block using the mapped quantization parameter value.

公开(公告)号：US09900622B2

公开(公告)日：2018-02-20

申请号：US14682462

申请日：2015-04-09

申请人： BlackBerry Limited

发明人： Jing Wang ,  Xiang Yu ,  Dake He

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

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.