公开(公告)号：US09118898B2

公开(公告)日：2015-08-25

申请号：US12820312

申请日：2010-06-22

申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

IPC分类号： H04N7/12 ,  H04N19/625 ,  G06F17/14 ,  H04N19/60

CPC分类号： H04N19/625 ,  G06F17/147 ,  H04N19/60

摘要： In general, techniques are described for implementing an 8-point inverse discrete cosine transform (IDCT). An apparatus comprising an 8-point inverse discrete cosine transform (IDCT) hardware unit may implement these techniques to transform media data from a frequency domain to a spatial domain. The 8-point IDCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point IDCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third, fourth, fifth and sixth internal factors.

摘要翻译： 通常，描述了用于实现8点逆离散余弦变换（IDCT）的技术。 包括8点逆离散余弦变换（IDCT）硬件单元的装置可实施这些技术以将媒体数据从频域转换为空间域。 8点IDCT硬件单元包括与根据第一关系的第一缩放因子（μ）相关的因子A，B的偶数部分。 8点IDCT硬件单元还包括与根据第二关系的第二比例因子（＆eegr）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个比例因素与第三个，第四个，第五个和第六个内部因素联系起来。

公开(公告)号：US09075757B2

公开(公告)日：2015-07-07

申请号：US12820357

申请日：2010-06-22

申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

IPC分类号： H04N7/12 ,  H04N11/02 ,  G06F17/14 ,  H04N19/176 ,  H04N19/122 ,  H04N19/42 ,  H04N19/625 ,  H04N19/61

CPC分类号： G06F17/147 ,  H04N19/122 ,  H04N19/176 ,  H04N19/42 ,  H04N19/61 ,  H04N19/625

摘要： In general, techniques are described for implementing a 16-point discrete cosine transform (DCT) that is capable of applying multiple IDCT of different sizes. For example, an apparatus comprising a 16-point discrete cosine transform of type II (DCT-II) unit may implement the techniques of this disclosure. The 16-point DCT-II unit performs these DCTs-II of different sizes to transform data from a spatial to a frequency domain. The 16-point DCT-II unit includes an 8-point DCT-II unit that performs one of the DCTs-II of size 8 and a first 4-point DCT-II unit that performs one of the DCTs-II of size 4. The 8-point DCT-II unit includes the first 4-point DCT-II unit. The 16-point DCT-II unit also comprises an 8-point DCT-IV unit that includes a second 4-point DCT-II unit and a third 4-point DCT-II unit. Each of the second and third 4-point DCT-II units performs one of the DCTs-II of size 4.

摘要翻译： 通常，描述了用于实现能够应用不同大小的多个IDCT的16点离散余弦变换（DCT）的技术。 例如，包括II型（DCT-II）单元的16点离散余弦变换的装置可以实现本公开的技术。 16点DCT-II单元执行不同尺寸的DCT-II以将数据从空间变换到频域。 16点DCT-II单元包括执行尺寸为8的DCT-II之一的8点DCT-II单元和执行尺寸为4的DCT-II之一的第一个4点DCT-II单元。 8点DCT-II单元包括第一个4点DCT-II单元。 16点DCT-II单元还包括8点DCT-IV单元，其包括第二个4点DCT-II单元和第三个4点DCT-II单元。 第二和第三4点DCT-II单元中的每一个执行大小为4的DCT-II之一。

公开(公告)号：US08451904B2

公开(公告)日：2013-05-28

申请号：US12820329

申请日：2010-06-22

申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

IPC分类号： H04N7/12

CPC分类号： H04N19/00812 ,  G06F17/147 ,  H04N19/42 ,  H04N19/45 ,  H04N19/61 ,  H04N19/625

摘要： In general, techniques are described for implementing an 8-point discrete cosine transform (DCT). An apparatus comprising an 8-point discrete cosine transform (DCT) hardware unit may implement these techniques to transform media data from a spatial domain to a frequency domain. The 8-point DCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point DCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third internal factor and a fourth internal factor, as well as, the fifth internal factor and a sixth internal factor.

摘要翻译： 通常，描述了用于实现8点离散余弦变换（DCT）的技术。 包括8点离散余弦变换（DCT）硬件单元的装置可以实施这些技术以将媒体数据从空间域转换到频域。 8点DCT硬件单元包括与根据第一关系的第一缩放因子（mu）相关的因子A，B的偶数部分。 8点DCT硬件单元还包括与根据第二关系的第二缩放因子（eta）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个缩放因子与第三个内在因素和第四个内在因素以及第五个内在因素和第六个内在因素联系起来。

公开(公告)号：US20120014455A1

公开(公告)日：2012-01-19

申请号：US13159063

申请日：2011-06-13

申请人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

发明人： Rajan L. Joshi ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yuriy Reznik ,  Peisong Chen ,  Hsiao-Chiang Chuang

IPC分类号： H04N7/30

CPC分类号： H04N19/42 ,  H04N19/122 ,  H04N19/157 ,  H04N19/176 ,  H04N19/184 ,  H04N19/196 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61

摘要： This disclosure describes techniques for mitigating rounding errors in a fixed-point transform associated with video coding by applying a variable localized bit-depth increase at the transform. More specifically, the techniques include selecting a constant value based on a size of a fixed-point transform in a video coding device and applying a variable localized bit-depth increase at the transform with a value equal to the constant value. Applying the variable localized bit-depth increase includes left-shifting a transform input signal by a number of bits equal to the constant value before the fixed-point transform, and right-shifting a transform output signal by a number of bits equal to the constant value after the fixed-point transform. The constant value is selected from a plurality of constant values stored on the video coding device. Each of the constant values is pre-calculated for one of a plurality of different transform sizes supported by the video coding.

摘要翻译： 本公开描述了通过在变换处应用可变局部位深增加来减轻与视频编码相关联的定点变换中的舍入误差的技术。 更具体地，这些技术包括基于视频编码装置中的定点变换的大小来选择常数值，并且在变换时以等于常数值的值应用可变的局部位深增加。 应用可变局部位置深度增加包括将变换输入信号左移到等于定点变换之前的常数值的位数，并且将变换输出信号右移到等于常数的位数 定点变换后的值。 从存储在视频编码装置上的多个常数值中选择常数值。 对于由视频编码支持的多个不同的变换大小之一，预先计算每个常数值。

公开(公告)号：US20110150078A1

公开(公告)日：2011-06-23

申请号：US12820329

申请日：2010-06-22

申请人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

发明人： Yuriy Reznik ,  Rajan L. Joshi ,  Marta Karczewicz

IPC分类号： H04N7/30

CPC分类号： H04N19/00812 ,  G06F17/147 ,  H04N19/42 ,  H04N19/45 ,  H04N19/61 ,  H04N19/625

摘要： In general, techniques are described for implementing an 8-point discrete cosine transform (DCT). An apparatus comprising an 8-point discrete cosine transform (DCT) hardware unit may implement these techniques to transform media data from a spatial domain to a frequency domain. The 8-point DCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point DCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third internal factor and a fourth internal factor, as well as, the fifth internal factor and a sixth internal factor.

摘要翻译： 通常，描述了用于实现8点离散余弦变换（DCT）的技术。 包括8点离散余弦变换（DCT）硬件单元的装置可以实施这些技术以将媒体数据从空间域转换到频域。 8点DCT硬件单元包括与根据第一关系的第一缩放因子（μ）相关的因子A，B的偶数部分。 8点DCT硬件单元还包括与根据第二关系的第二缩放因子（＆eegr）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。 第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。 第二个关系将第二个缩放因子与第三个内在因素和第四个内在因素以及第五个内在因素和第六个内在因素联系起来。

公开(公告)号：US11496760B2

公开(公告)日：2022-11-08

申请号：US13553617

申请日：2012-07-19

申请人： Ying Chen ,  Marta Karczewicz

发明人： Ying Chen ,  Marta Karczewicz

IPC分类号： H04N19/44 ,  H04N19/597 ,  H04N19/70 ,  H04N19/172 ,  H04N19/46 ,  H04N19/61 ,  H04N19/174

摘要： In one example, a video coder is configured to code a first slice, wherein the first slice comprises one of a texture slice and a corresponding depth slice, wherein the first slice has a slice header comprising complete syntax elements representative of characteristics of the first slice. The video coder is further configured to determine common syntax elements for a second slice from the slice header of the first slice. The video coder is also configured to code the second slice after coding the first slice at least partially based on the determined common syntax elements, wherein the second slice comprises one of the texture slice and the depth slice that is not the first slice, wherein the second slice has a slice header comprising syntax elements representative of characteristics of the second slice, excluding values for syntax elements that are common to the first slice.

公开(公告)号：US10298939B2

公开(公告)日：2019-05-21

申请号：US13529508

申请日：2012-06-21

申请人： Muhammed Zeyd Coban ,  Marta Karczewicz ,  In Suk Chong ,  Xianglin Wang

发明人： Muhammed Zeyd Coban ,  Marta Karczewicz ,  In Suk Chong ,  Xianglin Wang

IPC分类号： H04N7/40 ,  H04N7/32 ,  H04N19/196 ,  H04N19/105 ,  H04N19/176 ,  H04N19/61 ,  H04N19/463 ,  H04N19/90 ,  H04N19/426

摘要： In an example, aspects of this disclosure relate to a method of coding video data that includes identifying a plurality of quantization parameter (QP) values associated with a plurality of reference blocks of video data. The method also includes generating a reference QP for the plurality of reference blocks based on the plurality of QPs. The method also includes storing the reference QP, and coding a block of video data based on the stored reference QP.

公开(公告)号：US10237565B2

公开(公告)日：2019-03-19

申请号：US13561754

申请日：2012-07-30

申请人： Ying Chen ,  Marta Karczewicz ,  Ye-Kui Wang

发明人： Ying Chen ,  Marta Karczewicz ,  Ye-Kui Wang

IPC分类号： H04N19/37 ,  H04N19/40 ,  H04N13/00 ,  H04N21/2343 ,  H04N19/70 ,  H04N19/186 ,  H04N19/39 ,  H04N13/161

摘要： In one example, a device for coding video data includes a video coder configured to code, for a bitstream, information representative of which of a plurality of video coding dimensions are enabled for the bitstream, and code values for each of the enabled video coding dimensions, without coding values for the video coding dimensions that are not enabled, in a network abstraction layer (NAL) unit header of a NAL unit comprising video data coded according to the values for each of the enabled video coding dimensions. In this manner, NAL unit headers may have variable lengths, while still providing information for scalable dimensions to which the NAL units correspond.

公开(公告)号：US09807424B2

公开(公告)日：2017-10-31

申请号：US13311834

申请日：2011-12-06

申请人： Liwei Guo ,  Peisong Chen ,  Marta Karczewicz

发明人： Liwei Guo ,  Peisong Chen ,  Marta Karczewicz

IPC分类号： H04N7/32 ,  H04N19/86 ,  H04N19/159 ,  H04N19/176 ,  H04N19/117 ,  H04N19/127 ,  H04N19/17 ,  H04N19/80

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/127 ,  H04N19/159 ,  H04N19/17 ,  H04N19/176 ,  H04N19/80

摘要： During a video encoding or decoding process, a predicted prediction block is generated for a CU. The CU may have two or more prediction units (PUs). A computing device selects a neighbor region size. After the computing device selects the neighbor region size, samples in a transition zone of the prediction block are identified. Samples associated with a first PU are in the transition zone if neighbor regions that contain the samples also contain samples associated with a second PU. Samples associated with the second PU may be in the transition zone if neighbor regions that contain the samples also contain samples associated with the first PU. The neighbor regions have the selected neighbor region size. A smoothing operation is then performed on the samples in the transition zone.

公开(公告)号：US09736489B2

公开(公告)日：2017-08-15

申请号：US13585423

申请日：2012-08-14

申请人： Xianglin Wang ,  Yunfei Zheng ,  Vadim Seregin ,  Marta Karczewicz

发明人： Xianglin Wang ,  Yunfei Zheng ,  Vadim Seregin ,  Marta Karczewicz

IPC分类号： H04N19/436 ,  H04N19/52

CPC分类号： H04N19/436 ,  H04N19/52

摘要： For each prediction unit (PU) belonging to a coding unit (CU), a video coder generates a candidate list. The video coder generates the candidate list such that each candidate in the candidate list that is generated based on motion information of at least one other PU is generated without using motion information of any of the PUs belonging to the CU. After generating the candidate list for a PU, the video coder generates a predictive video block for the PU based on one or more reference blocks indicated by motion information of the PU. The motion information of the PU is determinable based on motion information indicated by a selected candidate in the candidate list for the PU.