公开(公告)号：US20160029028A1

公开(公告)日：2016-01-28

申请号：US14807687

申请日：2015-07-23

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Rajan Laxman Joshi ,  Joel Sole Rojals ,  Feng Zou ,  Marta Karczewicz ,  Jianle Chen

IPC: H04N19/176 ,  H04N19/463 ,  H04N19/186

CPC classification number: H04N19/176 ,  H04N19/11 ,  H04N19/129 ,  H04N19/182 ,  H04N19/186 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93 ,  H04N19/94

Abstract: Video data may comprise one or more blocks, each block being associated with a block palette comprising one or more palette entries specifying pixel values used in the block. A block is further divided into a plurality of sub-blocks. A sub-block scanning order for the block and pixel scanning orders for the sub-blocks are adaptively selected, based upon a distribution of pixel values within the block and sub-blocks. Sub-blocks may be associated with sub-block palettes, specifying pointers to palette entries of the block palette. Some sub-blocks may be encoded based upon pixel values of neighboring sub-blocks.

Abstract translation: 视频数据可以包括一个或多个块，每个块与块调色板相关联，所述块调色板包括指定在该块中使用的像素值的一个或多个调色板条目。 块被进一步分成多个子块。 基于块和子块内的像素值的分布，自适应地选择用于子块的块和像素扫描顺序的子块扫描顺序。 子块可以与子块调色板相关联，指定指向块调色板的调色板条目的指针。 可以基于相邻子块的像素值来编码一些子块。

公开(公告)号：US20160007042A1

公开(公告)日：2016-01-07

申请号：US14754577

申请日：2015-06-29

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Rajan Laxman Joshi ,  Jianle Chen ,  Marta Karczewicz ,  Cheng-Teh Hsieh ,  Feng Zou ,  Joel Sole Rojals

IPC: H04N19/593 ,  H04N19/91 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

Abstract: A method for decoding video data provided in a bitstream, where the bitstream includes a coding unit (CU) coded in palette mode, includes: parsing a palette associated with the CU provided in the bitstream; parsing one or more run lengths provided in the bitstream that are associated with the CU; parsing one or more index values provided in the bitstream that associated with the CU; and parsing one or more escape pixel values provided in the bitstream that are associated with the CU. The escape pixel values may be parsed from consecutive positions in the bitstream, the consecutive positions being in the bitstream after all of the run lengths and the index values associated with the CU. The method may further include decoding the CU based on the parsed palette, parsed run lengths, parsed index values, and parsed escape values.

Abstract translation: 一种用于对比特流中提供的视频数据进行解码的方法，其中所述比特流包括以调色板模式编码的编码单元（CU），包括：解析与所述比特流中提供的CU相关联的调色板; 解析与所述CU相关联的位流中提供的一个或多个游程长度; 解析与所述CU相关联的所述比特流中提供的一个或多个索引值; 以及解析与所述CU相关联的位流中提供的一个或多个逃逸像素值。 可以从比特流中的连续位置解析逃逸像素值，连续的位置在所有游程长度和与CU相关联的索引值之后在比特流中。 该方法还可以包括基于解析的调色板，解析的运行长度，解析的索引值和解析的转义值来解码CU。

公开(公告)号：US20150365695A1

公开(公告)日：2015-12-17

申请号：US14736102

申请日：2015-06-10

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Joel Sole Rojals ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/517 ,  H04N19/182 ,  H04N19/124 ,  H04N19/176

CPC classification number: H04N19/176 ,  H04N19/117 ,  H04N19/186 ,  H04N19/82

Abstract: Techniques are described for palette-based video coding. In palette-based coding, a video coder may form a so-called “palette” as a table of colors for representing video data of a given block of video data. Rather than coding actual pixel values or their residuals for the given block, the video coder may code index values for one or more of the pixels. The index values map the pixels to entries in the palette representing the colors of the pixels. Techniques are described for determining the application of deblocking filtering for pixels of palette coded blocks at a video encoder or a video decoder. In addition, techniques are described for determining quantization parameter (QP) values and delta QP values used to quantize escape pixel values of palette coded blocks at the video encoder or the video decoder.

Abstract translation: 描述了基于调色板的视频编码技术。 在基于调色板的编码中，视频编码器可以形成所谓的“调色板”作为用于表示给定的视频数据块的视频数据的颜色表。 视频编码器不需要为给定块编码实际像素值或其残差，而是可以对一个或多个像素的索引值进行编码。 索引值将像素映射到调色板中表示像素颜色的条目。 描述了用于确定在视频编码器或视频解码器处调色板编码块的像素的去块滤波的应用的技术。 此外，描述了用于确定用于量化视频编码器或视频解码器处的调色板编码块的转义像素值的量化参数（QP）值和ΔQP值的技术。

公开(公告)号：US20150341660A1

公开(公告)日：2015-11-26

申请号：US14719215

申请日：2015-05-21

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Vadim Seregin ,  Wei Pu ,  Marta Karczewicz ,  Joel Sole Rojals ,  Krishnakanth Rapaka

IPC: H04N19/583 ,  H04N19/132 ,  H04N19/176 ,  H04N19/93 ,  H04N19/44

CPC classification number: H04N19/583 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/463 ,  H04N19/70 ,  H04N19/93

Abstract: In an example, a method of processing video data includes determining a value of a block-level syntax element that indicates, for all samples of a block of video data, whether at least one respective sample of the block is coded based on a color value of the at least one respective sample not being included in a palette of colors for coding the block of video data. The method also includes coding the block of video data based on the value.

Abstract translation: 在一个示例中，处理视频数据的方法包括确定块级语法元素的值，该块级语法元素针对视频数据块的所有样本，基于颜色值是否对块的至少一个相应样本进行编码 所述至少一个相应样本不包括在用于对所述视频数据块进行编码的颜色调色板中。 该方法还包括基于该值对视频数据块进行编码。

公开(公告)号：US09197890B2

公开(公告)日：2015-11-24

申请号：US14270162

申请日：2014-05-05

Applicant: QUALCOMM Incorporated

Inventor： Joel Sole Rojals ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N19/436 ,  H04N19/129 ,  H04N19/176 ,  H04N19/70 ,  H04N19/196 ,  H04N19/61 ,  H04N19/60 ,  H04N19/463 ,  H04N19/91 ,  H04N19/136 ,  H04N19/18 ,  H04N19/167 ,  H04N19/13

CPC classification number: H04N19/129 ,  H04N19/00109 ,  H04N19/13 ,  H04N19/136 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/436 ,  H04N19/463 ,  H04N19/60 ,  H04N19/61 ,  H04N19/619 ,  H04N19/70 ,  H04N19/91

Abstract: This disclosure describes devices and methods for coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order. This disclosure proposes a harmonization of the scan order to code both the significance map of the transform coefficients as well as to code the levels of the transform coefficient. It is proposed that the scan order for the significance map should be in the inverse direction (i.e., from the higher frequencies to the lower frequencies). This disclosure also proposes that transform coefficients be scanned in sub-sets as opposed to fixed sub-blocks. In particular, transform coefficients are scanned in a sub-set consisting of a number of consecutive coefficients according to the scan order.

Abstract translation: 本公开描述了用于编码与视频编码过程中的残留视频数据块相关联的变换系数的装置和方法。 本公开的方面包括选择重要性地图编码和级别编码的扫描顺序，以及与所选择的扫描顺序一致的用于熵编码的上下文的选择。 本公开提出了对扫描顺序进行协调以编码变换系数的重要性图以及对变换系数的等级进行编码。 提出，显着图的扫描顺序应该在相反方向（即，从较高频率到较低频率）。 本公开还提出了与固定子块相反的子集中的变换系数的扫描。 具体地，根据扫描顺序，在由多个连续系数组成的子集中扫描变换系数。

公开(公告)号：US20150016537A1

公开(公告)日：2015-01-15

申请号：US14327398

申请日：2014-07-09

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Joel Sole Rojals ,  Rajan Laxman Joshi ,  Liwei Guo

IPC: H04N19/60

CPC classification number: H04N19/60 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/91

Abstract: Techniques are described for initializing a Rice parameter used to define codes for coefficient level coding. According to the techniques, the initial value of the Rice parameter is determined for a coefficient group (CG) in a transform block of video data based on statistics of coefficient levels that are gathered for previously coded coefficients of the video data. The statistics may be statistics of absolute values of coefficient levels or remaining absolute values of coefficient levels of previously coded coefficients. A value of the statistics may be initialized to zero at a beginning of a video slice and updated based on coefficient levels coded in each CG of the slice. The statistics may be updated once per CG. In some cases, statistics may be gathered separately for each of a plurality of different categories of CGs that are defined based on characteristics of transform blocks that include the CGs.

Abstract translation: 描述了用于初始化用于定义系数级编码代码的Rice参数的技术。 根据该技术，基于针对视频数据的先前编码系数收集的系数级别的统计，确定视频数据的变换块中的系数组（CG）的Rice参数的初始值。 统计可以是系数级别的绝对值或先前编码系数的系数级别的绝对值的统计。 可以在视频片段的开始处将统计的值初始化为零，并且基于在片的每个CG中编码的系数级别来更新。 统计数据可能会每CG更新一次。 在一些情况下，可以针对基于包括CG的变换块的特性定义的多个不同类别的CG中的每一个分别收集统计数据。

公开(公告)号：US08718144B2

公开(公告)日：2014-05-06

申请号：US13736270

申请日：2013-01-08

Applicant: Qualcomm Incorporated

Inventor： Yuriy Reznik ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/12

CPC classification number: H04N19/00812 ,  G06F17/147 ,  H04N19/42 ,  H04N19/45 ,  H04N19/61 ,  H04N19/625

Abstract: 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.

Abstract translation: 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：US20130182757A1

公开(公告)日：2013-07-18

申请号：US13710212

申请日：2012-12-10

Applicant: QUALCOMM INCORPORATED

Inventor： Marta Karczewicz ,  Jianle Chen ,  Wei-Jung Chien ,  Rajan Laxman Joshi

IPC: H04N7/26

CPC classification number: H04N19/00775 ,  H04N19/13 ,  H04N19/60 ,  H04N19/70

Abstract: This disclosure proposes various techniques for limiting the number of bins that are coded using an adaptive context model with context adaptive binary arithmetic coding (CABAC). In particular, this disclosure proposes to limit the number of bins that use CABAC for coding level information of transform coefficients in a video coding process.

Abstract translation: 本公开提出了用于限制使用具有上下文自适应二进制算术编码（CABAC）的自适应上下文模型编码的分组数量的各种技术。 特别地，本发明提出限制在视频编码处理中使用CABAC对于变换系数的编码电平信息的信道数。

公开(公告)号：US20130121406A1

公开(公告)日：2013-05-16

申请号：US13736270

申请日：2013-01-08

Applicant: Qualcomm Incorporated

Inventor： Yuriy Reznik ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/00812 ,  G06F17/147 ,  H04N19/42 ,  H04N19/45 ,  H04N19/61 ,  H04N19/625

Abstract: 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.

Abstract translation: 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：US20130114738A1

公开(公告)日：2013-05-09

申请号：US13669032

申请日：2012-11-05

Applicant: QUALCOMM INCORPORATED

Inventor： Wei-Jung Chien ,  Joel Sole Rojals ,  Marta Karczewicz ,  Rajan Laxman Joshi

IPC: H04N7/26 ,  H04N7/30

CPC classification number: H04N19/88 ,  H03M7/4018 ,  H03M7/4037 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463 ,  H04N19/70

Abstract: A video encoder is configured to determine a first and second binary string for a value indicating the position of the last significant coefficient, within a video block of size T. A video decoder is configured to determine a value indicating the position of a last significant coefficient within a video block of size T based on a first and second binary string. In one example, the first binary string is based on a truncated unary coding scheme defined by a maximum bit length defined by 2 log2(T)−1 and the second binary string is based on a fixed length coding scheme defined by a maximum bit length defined by log2(T)−2.

Abstract translation: 视频编码器被配置为在大小为T的视频块内确定用于指示最后有效系数的位置的值的第一和第二二进制串。视频解码器被配置为确定指示最后有效系数的位置的值 在基于第一和第二二进制串的大小为T的视频块内。 在一个示例中，第一二进制串基于由2log2（T）-1定义的最大位长定义的截断的一元编码方案，第二二进制串基于由最大位长度定义的固定长度编码方案 由log2（T）-2定义。