公开(公告)号：US09769449B2

公开(公告)日：2017-09-19

申请号：US14463368

申请日：2014-08-19

Applicant: BlackBerry Limited

Inventor： Dake He ,  Xiang Yu ,  Jing Wang

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

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

Abstract: 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

Applicant: BLACKBERRY LIMITED

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

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

Abstract: 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.

Abstract translation: 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

Applicant: BlackBerry Limited

Inventor： Jing Wang ,  Xiang Yu ,  Dake He ,  Steven Wayne Campbell

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

CPC classification number: H04N19/117 ,  G06T9/004 ,  H04N19/19 ,  H04N19/50 ,  H04N19/60 ,  H04N19/625 ,  H04N19/82

Abstract: 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：US09215464B2

公开(公告)日：2015-12-15

申请号：US14031393

申请日：2013-09-19

Applicant: BLACKBERRY LIMITED

Inventor： Xiaofeng Wang ,  Jing Wang ,  Dake He ,  Tianying Ji

IPC: G06K9/36 ,  H04N19/129 ,  H04N19/13 ,  H04N19/91 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/593 ,  H04N19/103 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/423 ,  H04N19/44 ,  H04N19/513 ,  H04N19/91

Abstract: Methods and devices for video coding are described. When encoding a non-zero coefficient group (CG) prior to the last such group in a group scan ordering within a transform block, data representative of the true (x,y)-position of the last non-zero transform coefficient in a scan ordering within that CG is modified, to improve coding efficiency, based upon at least one of (a) an intra-prediction mode used to encode the block and (b) at least one coefficient group neighboring that CG. Upon decoding a CG thus encoded, the modification is un-done to retrieve the true (x,y)-position.

Abstract translation: 描述视频编码的方法和设备。 当在变换块内的组扫描排序中对最后一个这样的组之前的非零系数组（CG）进行编码时，表示扫描中最后非零变换系数的真（x，y）位的数据 根据（a）用于编码块的帧内预测模式和（b）与该CG相邻的至少一个系数组中的至少一个，修改该CG内的排序以提高编码效率。 在对由此编码的CG进行解码时，修改未完成以检索真（x，y）位。

公开(公告)号：US20140355674A1

公开(公告)日：2014-12-04

申请号：US14463368

申请日：2014-08-19

Applicant: BlackBerry Limited

Inventor： Dake He ,  Xiang Yu ,  Jing Wang

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

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

Abstract: 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：US10103746B2

公开(公告)日：2018-10-16

申请号：US15208717

申请日：2016-07-13

Applicant: BlackBerry Limited

Inventor： Dake He ,  Jing Wang

IPC: H03M7/34 ,  H03M7/40 ,  H03M7/30

Abstract: 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.

公开(公告)号：US09813737B2

公开(公告)日：2017-11-07

申请号：US14031436

申请日：2013-09-19

Applicant: BLACKBERRY LIMITED

Inventor： Jing Wang ,  Xiaofeng Wang ,  Dake He ,  Tianying Ji

IPC: H04N19/61 ,  H04N19/13 ,  H04N19/157 ,  H04N19/91

CPC classification number: H04N19/61 ,  H04N19/13 ,  H04N19/157 ,  H04N19/91

Abstract: Methods and devices for video coding are described. If an intra-prediction mode to be used in encoding a block of residual data is in a specific predetermined class, e.g., the horizontal class, then at least a portion of a quantized transformed block of residual data is transposed during encoding. Likewise, if an intra-prediction mode that was used to generate an encoded block of residual data is in such a class, then at least a portion of an entropy-decoded block of residual data is transposed during decoding.

公开(公告)号：US10291912B2

公开(公告)日：2019-05-14

申请号：US14760514

申请日：2013-01-16

Applicant: BlackBerry Limited

Inventor： Dake He ,  Tianying Ji ,  Jing Wang ,  Xiaofeng Wang

IPC: H04N19/60 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/14 ,  H04N19/18 ,  H04N19/593 ,  H04N19/91 ,  H04N19/129

Abstract: Methods and devices for encoding and decoding video using mode-dependent context determination in the case of level-run pair coding of transform coefficients are described. Intra-coding modes may be grouped into classes and each class may be associated with a partitioning of a coefficient group into regions. The region in which a coefficient falls determines, in part, the context selected for encoding bins associated with that coefficient, including a level, if the coefficient is non-zero, and a run if the coefficient correspond to the bin of a binarized run value.

公开(公告)号：US09578347B2

公开(公告)日：2017-02-21

申请号：US15050625

申请日：2016-02-23

Applicant: Blackberry Limited

Inventor： Dake He ,  Jing Wang ,  Xiang Yu

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

CPC classification number: H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/463 ,  H04N19/467 ,  H04N19/48 ,  H04N19/91

Abstract: 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.

Abstract translation: 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

Applicant: BLACKBERRY LIMITED

Inventor： Xiang Yu ,  Dake He ,  Jing Wang

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

CPC classification number: H04N19/154 ,  H04N19/126 ,  H04N19/14 ,  H04N19/147 ,  H04N19/186 ,  H04N19/197 ,  H04N19/463 ,  H04N19/625 ,  H04N19/70

Abstract: 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.

Abstract translation: 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。