公开(公告)号：US09357185B2

公开(公告)日：2016-05-31

申请号：US13669096

申请日：2012-11-05

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/10 ,  H03M7/40 ,  H04N19/176 ,  H04N19/13 ,  H04N19/18

CPC classification number: H04N19/10 ,  H03M7/4018 ,  H03M7/4037 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18

Abstract: A video encoder is configured to encode a binary sting indicating a position of a last significant coefficient within a video block. A video decoder is configured to decode the encoded binary string. The string may be coded using context adaptive binary arithmetic coding (CABAC). Binary indices of the binary string may be assigned a context. The context may be determined according to a mapping function. A context may be a assigned to one or more binary indices where each index is associated with a different block size. The last binary index of a 16×16 video block may share a context with the last binary index of a 32×32 video block.

Abstract translation: 视频编码器被配置为对指示视频块内的最后有效系数的位置的二进制编码进行编码。 视频解码器被配置为对编码的二进制串进行解码。 字符串可以使用上下文自适应二进制算术编码（CABAC）来编码。 二进制字符串的二进制索引可以被分配上下文。 上下文可以根据映射函数来确定。 上下文可以被分配给一个或多个二进制索引，其中每个索引与不同的块大小相关联。 16×16视频块的最后二进制索引可以与32×32视频块的最后二进制索引共享上下文。

公开(公告)号：US09148667B2

公开(公告)日：2015-09-29

申请号：US13760750

申请日：2013-02-06

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/105 ,  H04N19/176 ,  H04N19/147 ,  H04N19/11 ,  H04N19/19 ,  H04N19/433 ,  H04N19/436

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/433 ,  H04N19/436

Abstract: In general, techniques are described for reducing the space required to store rate distortion values when selecting from multiple, different prediction modes. A video coding device comprising a processor may perform the techniques. The processor may determine first and second sets of intra-prediction modes for a current block of video data. The first and second sets of intra-prediction modes may include less intra-prediction modes, collectively, than a total number of intra-prediction modes. The processor may compute an approximate cost for each intra-prediction mode included in the first and second sets of intra-prediction modes. The processor may store the approximate cost for each intra-prediction mode identified in the first and second sets of intra-prediction modes to a memory. The processor may perform intra-prediction to encode the current block using a mode identified in at least one of the first or second set.

Abstract translation: 通常，描述了当从多个不同的预测模式进行选择时，减少存储速率失真值所需的空间的技术。 包括处理器的视频编码装置可以执行这些技术。 处理器可以确定当前视频数据块的第一组和第二组帧内预测模式。 第一组和第二组帧内预测模式可以包括比帧内预测模式的总数更少的帧内预测模式。 处理器可以计算包括在第一和第二组帧内预测模式中的每个帧内预测模式的近似成本。 处理器可以将在第一和第二组帧内预测模式中识别的每个帧内预测模式的近似成本存储到存储器。 处理器可以执行帧内预测，​​以使用在第一或第二组中的至少一个中识别的模式对当前块进行编码。

公开(公告)号：US20140341297A1

公开(公告)日：2014-11-20

申请号：US14448874

申请日：2014-07-31

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Peisong Chen ,  Marta Karczewicz

IPC: H04N19/51 ,  H04N19/13 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/513 ,  H04N19/517 ,  H04N19/52 ,  H04N19/523 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

Abstract: In one example, a device for coding video data includes a video coder configured to configured to code information representative of whether an absolute value of an x-component of a motion vector difference value for a current block of video data is greater than zero, code information representative of whether an absolute value of a y-component of the motion vector difference value is greater than zero, when the absolute value of the x-component is greater than zero, code information representative of the absolute value of the x-component, when the absolute value of the y-component is greater than zero, code information representative of the absolute value of the y-component, when the absolute value of the x-component is greater than zero, code a sign of the x-component, and when the absolute value of the y-component is greater than zero, code a sign of the y-component.

Abstract translation: 在一个示例中，用于编码视频数据的设备包括：视频编码器，被配置为对表示当前视频数据块的运动矢量差值的x分量的绝对值是否大于零的代码进行编码;代码 表示运动矢量差值的y分量的绝对值是否大于零的信息，当x分量的绝对值大于零时，表示x分量的绝对值的代码信息， 当y分量的绝对值大于零时，表示y分量的绝对值的代码信息，当x分量的绝对值大于零时，编码x分量的符号， 并且当y分量的绝对值大于零时，编码y分量的符号。

公开(公告)号：US20130188701A1

公开(公告)日：2013-07-25

申请号：US13744128

申请日：2013-01-17

Applicant: Qualcomm Incorporated

Inventor： Sanjeev Kumar ,  Hsiao-Chiang Chuang ,  Shu Xiao ,  Kai Wang ,  Vladan Andrijanic ,  Xianglin Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N7/26

CPC classification number: H04N19/50 ,  H04N19/11 ,  H04N19/156 ,  H04N19/174 ,  H04N19/436

Abstract: The techniques of this disclosure are generally related to parallel coding of video units that reside along rows or columns of blocks in largest coding units. For example, the techniques include removing intra-prediction dependencies between two video units in different rows or columns to allow for parallel coding of rows or columns of the video units.

Abstract translation: 本公开的技术通常涉及以最大编码单元沿着行或列的行驻留的视频单元的并行编码。 例如，这些技术包括去除不同行或列中的两个视频单元之间的帧内预测依赖性，以允许视频单元的行或列的并行编码。

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：US20130177070A1

公开(公告)日：2013-07-11

申请号：US13738565

申请日：2013-01-10

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Joel Sole Rojals ,  Marta Karczewicz ,  Wei-Jung Chien ,  Jianle Chen

IPC: H04N7/26

CPC classification number: H04N19/13 ,  H04N19/129 ,  H04N19/18

Abstract: In an example, aspects of this disclosure relate to a process for video coding that includes determining that a set of support for selecting a context model to code a current significant coefficient flag of a transform coefficient of a block of video data includes at least one significant coefficient flag that is not available. The process also includes, based on the determination, modifying the set of support, and calculating a context for the current significant coefficient flag using the modified set of support. The process also includes applying context-adaptive binary arithmetic coding (CABAC) to code the current significant coefficient flag based on the calculated context.

Abstract translation: 在一个示例中，本公开的方面涉及用于视频编码的过程，其包括确定用于选择上下文模型的一组支持以编码视频数据块的变换系数的当前有效系数标志的方法包括至少一个有效值 系数标志不可用。 该过程还包括基于确定修改支持集合，以及使用修改的支持集合来计算当前重要系数标志的上下文。 该过程还包括应用上下文自适应二进制算术编码（CABAC）来基于所计算的上下文对当前有效系数标志进行编码。

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。

公开(公告)号：US20130114707A1

公开(公告)日：2013-05-09

申请号：US13666594

申请日：2012-11-01

Applicant: Qualcomm Incorporated

Inventor： Vadim Seregin ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N7/32

CPC classification number: H04N19/11

Abstract: This disclosure relates to methods and apparatus for encoding and decoding video data. In an example an intra-mode for predicting a current block of video data and most probable intra-modes (MPMs) for predicting the current block of video data may be determined. MPMs for predicting the current block of video data may be determined. An index for each of the MPMs based on an order in which the intra-mode for predicting the current block is compared to the MPMs may be determined. When one of the MPMs for predicting the current block matches the intra-mode for predicting the current block, the index of the matching MPM.

Abstract translation: 本公开涉及用于对视频数据进行编码和解码的方法和装置。 在一个示例中，可以确定用于预测视频数据的当前块的帧内模式和用于预测视频数据的当前块的最可能的帧内模式（MPM）。 可以确定用于预测视频数据的当前块的MPM。 可以确定基于用于将用于预测当前块的帧内模式与MPM进行比较的顺序的每个MPM的索引。 当用于预测当前块的MPM之一与用于预测当前块的帧内模式匹配时，匹配MPM的索引。

公开(公告)号：US20130114676A1

公开(公告)日：2013-05-09

申请号：US13669096

申请日：2012-11-05

Applicant: QUALCOMM INCORPORATED

Inventor： Liwei Guo ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/10 ,  H03M7/4018 ,  H03M7/4037 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18

Abstract: A video encoder is configured to encode a binary sting indicating a position of a last significant coefficient within a video block. A video decoder is configured to decode the encoded binary string. The string may be coded using context adaptive binary arithmetic coding (CABAC). Binary indices of the binary string may be assigned a context. The context may be determined according to a mapping function. A context may be a assigned to one or more binary indices where each index is associated with a different block size. The last binary index of a 16×16 video block may share a context with the last binary index of a 32×32 video block.

Abstract translation: 视频编码器被配置为对指示视频块内的最后有效系数的位置的二进制编码进行编码。 视频解码器被配置为对编码的二进制串进行解码。 字符串可以使用上下文自适应二进制算术编码（CABAC）来编码。 二进制字符串的二进制索引可以被分配上下文。 上下文可以根据映射函数来确定。 上下文可以被分配给一个或多个二进制索引，其中每个索引与不同的块大小相关联。 16×16视频块的最后二进制索引可以与32×32视频块的最后二进制索引共享上下文。

公开(公告)号：US20130114673A1

公开(公告)日：2013-05-09

申请号：US13645330

申请日：2012-10-04

Applicant: Qualcomm Incorporated

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

IPC: H04N7/26

CPC classification number: H04N19/60 ,  H03M7/4018 ,  H04N19/103 ,  H04N19/13 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/50 ,  H04N19/91

Abstract: A reduction in the number of binarizations and/or contexts used in context adaptive binary arithmetic coding (CABAC) for video coding is proposed. In particular, this disclosure proposes techniques that may lower the number contexts used in CABAC by up to 56.