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：US20130170562A1

公开(公告)日：2013-07-04

申请号：US13727031

申请日：2012-12-26

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/82 ,  H04N19/86

Abstract: In one example, a video coding device is configured to decode four blocks of video data, wherein the four blocks are non-overlapping and share one common point such that four edge segments are formed by the four blocks, for each of the four edge segments, determine whether to deblock the respective edge segment based on a first analysis of at least one line of pixels that is perpendicular to the respective edge segment and that intersects the respective edge segment, for each of the four edge segments that was determined to be deblocked, determine whether to apply a strong filter or a weak filter to the respective edge segment based on a second analysis of the at least one line of pixels for the respective edge, and deblock the four edge segments based on the determinations.

Abstract translation: 在一个示例中，视频编码设备被配置为对四个视频数据块进行解码，其中四个块是不重叠的并且共享一个公共点，使得四个边缘段由四个块形成，四个边缘段中的每一个 基于对于被确定为被去块的四个边缘片段中的每一个，基于垂直于相应边缘片段并且与相应边缘片段相交的至少一行像素的第一次分析，确定是否去块相应的边缘片段 基于对于相应边缘的至少一行像素的第二分析，确定是否对相应边缘段应用强滤波器或弱滤波器，以及基于确定来解除四个边缘段。

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。

公开(公告)号：US20130114730A1

公开(公告)日：2013-05-09

申请号：US13670167

申请日：2012-11-06

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Joel Sole Rojals ,  Xianglin Wang ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N7/30

CPC classification number: H04N19/70 ,  H04N19/12 ,  H04N19/129 ,  H04N19/156 ,  H04N19/196 ,  H04N19/463 ,  H04N19/625

Abstract: This disclosure describes techniques for coding significant coefficient information for a video block in a transform skip mode. The transform skip mode may provide a choice of a two-dimensional transform mode, a horizontal one-dimensional transform mode, a vertical one-dimensional transform mode, or a no transform mode. In other cases, the transform skip mode may provide a choice between a two-dimensional transform mode and a no transform mode. The techniques include selecting a transform skip mode for a video block, and coding significant coefficient information for the video block using a coding procedure defined based at least in part on the selected transform skip mode. Specifically, the techniques include using different coding procedures to code one or more of a position of a last non-zero coefficient and a significance map for the video block in the transform skip mode.

Abstract translation: 本公开描述了用于以变换跳过模式对视频块的有效系数信息进行编码的技术。 变换跳过模式可以提供二维变换模式，水平一维变换模式，垂直一维变换模式或无变换模式的选择。 在其他情况下，变换跳过模式可以提供二维变换模式和无变换模式之间的选择。 这些技术包括：选择用于视频块的变换跳过模式，以及使用至少部分地基于所选择的变换跳过模式定义的编码过程来编码视频块的有效系数信息。 具体地说，这些技术包括使用不同的编码程序对变换跳过模式中的视频块的最后非零系数的位置和重要性映射的一个或多个进行编码。

公开(公告)号：US20130114717A1

公开(公告)日：2013-05-09

申请号：US13669992

申请日：2012-11-06

Applicant: Qualcomm Incorporated

Inventor： Yunfei Zheng ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26 ,  H04N7/36

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/119 ,  H04N19/147 ,  H04N19/154 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

Abstract: In generating a candidate list for inter prediction video coding, a video coder can perform pruning operations when adding spatial candidates and temporal candidates to a candidate list while not performing pruning operations when adding an artificially generated candidate to the candidate list. The artificially generated candidate can have motion information that is the same as motion information of a spatial candidate or temporal candidate already in the candidate list.

Abstract translation: 在生成帧间预测视频编码的候选列表时，视频编码器可以在向候选列表添加人为生成的候选者时，在不进行剪枝操作的情况下，向候选列表添加空格候选和时间候选，进行修剪操作。 人为生成的候选者可以具有与已经在候选列表中的空间候选或时间候选的运动信息相同的运动信息。

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：US20130114694A1

公开(公告)日：2013-05-09

申请号：US13669595

申请日：2012-11-06

Applicant: Qualcomm Incorporated

Inventor： Ying Chen ,  Ye-Kui Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/463 ,  H04N19/70

Abstract: A video coding device, such as a video encoder or a video decoder, may be configured to code a parameter set group representing a first parameter set of a first type and a second parameter set of a second, different type, and code a slice of video data using information of the parameter set group, information of the first parameter set, and information of the second parameter set, wherein the slice includes information referring to the parameter set group. The video coding device may further code the first and second parameter sets.

Abstract translation: 诸如视频编码器或视频解码器的视频编码设备可以被配置为对表示第二类型的第一类型和第二参数集的第一参数集的参数集组进行编码，并且对 使用参数集组的信息，第一参数集的信息和第二参数集的信息的视频数据，其中，片包括参考参数集组的信息。 视频编码装置还可以对第一和第二参数集进行编码。

公开(公告)号：US20130114691A1

公开(公告)日：2013-05-09

申请号：US13665403

申请日：2012-10-31

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz ,  Xianglin Wang

IPC: H04N7/26

CPC classification number: H03M7/4018 ,  H04N19/13 ,  H04N19/61

Abstract: In one example, an apparatus for context adaptive entropy coding a video unit comprises a coder configured to code a syntax element, wherein a first value of the syntax element indicates that one or more of a plurality of context states are initialized using an adaptive initialization mode for the video unit, and a second value of the syntax element indicates that each of the plurality of context states is initialized using a default initialization mode for the video unit. In some examples, when the syntax element has the first value, the coder is further configured to code a map that indicates which of the context states are initialized using the adaptive initialization mode, and to further code either an initial state value for those contexts, or information from which the initial state values of those adaptively initialized context may be derived.

Abstract translation: 在一个示例中，用于视频单元的上下文自适应熵编码的装置包括被配置为对语法元素进行编码的编码器，其中语法元素的第一值指示使用自适应初始化模式来初始化多个上下文状态中的一个或多个 并且所述语法元素的第二值指示使用所述视频单元的默认初始化模式来初始化所述多个上下文状态中的每一个。 在一些示例中，当语法元素具有第一值时，编码器还被配置为使用自适应初始化模式编码指示哪个上下文状态被初始化的映射，并且进一步对这些上下文的初始状态值进行编码， 或者可以导出这些自适应初始化上下文的初始状态值的信息。

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。