公开(公告)号：US09185405B2

公开(公告)日：2015-11-10

申请号：US13828416

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz

IPC: H04N11/02 ,  H04N19/136 ,  H04N19/70 ,  H04N19/196 ,  H04N19/96 ,  H04N19/463 ,  H04N19/90

CPC classification number: H04N19/136 ,  H04N19/196 ,  H04N19/463 ,  H04N19/70 ,  H04N19/90 ,  H04N19/96

Abstract: A video decoder determines whether a first condition is satisfied. The first condition is satisfied when any sibling residual quad tree (RQT) node of a current RQT node is associated with a significant luma coefficient block. In addition, the video decoder determines whether a second condition is satisfied. The second condition is satisfied when a chroma transform block of a parent RQT node of the current RQT node is significant and is split along with a luma transform block of the parent RQT node. In response to determining that neither the first nor the second condition is satisfied, the video decoder determines that a luma coded block flag (CBF) for the current RQT node is omitted from the bitstream.

Abstract translation: 视频解码器确定是否满足第一条件。 当当前RQT节点的任何兄弟剩余四叉树（RQT）节点与重要亮度系数块相关联时，满足第一条件。 此外，视频解码器确定是否满足第二条件。 当当前RQT节点的父RQT节点的色度变换块是有效的并且与母RQT节点的亮度变换块一起被分割时，满足第二条件。 响应于确定不满足第一和第二条件，视频解码器确定从比特流中省略当前RQT节点的亮度编码块标志（CBF）。

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：US20140086307A1

公开(公告)日：2014-03-27

申请号：US14037159

申请日：2013-09-25

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Joel Sole Rojals ,  Liwei Guo

IPC: H04N7/26

CPC classification number: H04N19/18 ,  H04N19/463 ,  H04N19/61 ,  H04N19/647 ,  H04N19/70 ,  H04N19/91 ,  H04N19/96

Abstract: A device for coding video data includes a video coder configured to code first significance information for transform coefficients associated with residual data, wherein the first significance information indicates if a first sub-block comprises at least one non-zero coefficient, wherein the first sub-block is a sub-block of an entire transform block; and, code second significance information, wherein the second significance information indicates if a second sub-block comprises at least one non-zero coefficient, wherein the second sub-block is a sub-block of the first sub-block, wherein coding the second significance information comprises performing an arithmetic coding operation on the second significance information, wherein a context for the arithmetic coding operation is determined based on one or more neighboring sub-blocks of a same size as the first sub-block.

Abstract translation: 一种用于编码视频数据的设备包括：视频编码器，被配置为对与残差数据相关联的变换系数编码第一有效信息，其中第一有效信息指示第一子块是否包括至少一个非零系数，其中， 块是整个变换块的子块; 以及代码第二有效信息，其中第二有效信息指示第二子块是否包括至少一个非零系数，其中第二子块是第一子块的子块，其中编码第二子块 重要信息包括对第二有效信息执行算术编码操作，其中基于与第一子块相同大小的一个或多个相邻子块来确定用于算术编码操作的上下文。

公开(公告)号：US20140050261A1

公开(公告)日：2014-02-20

申请号：US13964788

申请日：2013-08-12

Applicant: QUALCOMM Incorporated

Inventor： Chengjie Tu ,  Jianle Chen ,  Marta Karczewicz ,  Liwei Guo

IPC: H04N7/26

CPC classification number: H04N19/129 ,  H04N19/14 ,  H04N19/176 ,  H04N19/33 ,  H04N19/46 ,  H04N19/61

Abstract: An apparatus for coding video information includes a memory unit configured to store video information associated with a reference block; and a processor in communication with the memory unit, wherein the processor is configured to determine a value of a current video unit associated with the reference block based on, at least in part, a classification of the reference block and a scan order selected by the processor based upon the classification. The scan order indicates an order in which values within the reference block are processed to at least partially determine the value of the current video unit.

Abstract translation: 一种用于编码视频信息的装置包括：存储单元，被配置为存储与参考块相关联的视频信息; 以及与所述存储器单元通信的处理器，其中所述处理器被配置为至少部分地基于所述参考块的分类和由所述参考块选择的扫描顺序来确定与所述参考块相关联的当前视频单元的值 处理器基于分类。 扫描顺序指示参考块内的值被处理以至少部分地确定当前视频单元的值的顺序。

公开(公告)号：US20130188700A1

公开(公告)日：2013-07-25

申请号：US13744087

申请日：2013-01-17

Applicant: QUALCOMM INCORPORATED

Inventor： Liwei Guo ,  Muhammed Zeyd Coban ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/50 ,  H03M7/4018 ,  H04N19/13 ,  H04N19/21 ,  H04N19/60 ,  H04N19/91

Abstract: Techniques for coding data, such as, e.g., video data, include coding a first syntax element, conforming to a particular type of syntax element, of a first slice of video data, conforming to a first slice type, using an initialization value set. The techniques further include coding a second syntax element, conforming to the same type of syntax element, of a second slice of video data, conforming to a second slice type, using the same initialization value set. In this example, the first slice type may be different from the second slice type. Also in this example, at least one of the first slice type and the second slice type may be a temporally predicted slice type. For example, the at least one of the first and second slice types may be a unidirectional inter-prediction (P) slice type, or a bi-directional inter-prediction (B) slice type.

Abstract translation: 用于编码数据（例如，视频数据）的技术包括使用初始化值集合来编码符合第一切片类型的第一片视频数据的符合特定类型的语法元素的第一语法元素。 所述技术还包括使用相同的初始化值集合来编码符合第二片类型的视频数据的第二片段的符合相同类型的语法元素的第二语法元素。 在该示例中，第一切片类型可以不同于第二切片类型。 同样在该示例中，第一切片类型和第二切片类型中的至少一个可以是时间预测的切片类型。 例如，第一和第二切片类型中的至少一个可以是单向帧间预测（P）切片类型或双向帧间预测（B）切片类型。

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。

公开(公告)号：US20130114675A1

公开(公告)日：2013-05-09

申请号：US13665467

申请日：2012-10-31

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz ,  Joel Sole Rojals

IPC: H04N7/26 ,  H03M7/00

CPC classification number: H03M7/4018 ,  H04N19/13

Abstract: In one example, an apparatus for context adaptive entropy coding may include a coder configured to determine one or more initialization parameters for a context adaptive entropy coding process based on one or more initialization parameter index values. The coder may be further configured to determine one or more initial context states for initializing one or more contexts of the context adaptive entropy coding process based on the initialization parameters. The coder may be still further configured to initialize the contexts based on the initial context states. In some examples, the initialization parameters may be included in one or more tables, wherein, to determine the initialization parameters, the coder may be configured to map the initialization parameter index values to the initialization parameters in the tables. Alternatively, the coder may be configured to calculate the initialization parameters using the initialization parameter index values and one or more formulas.

Abstract translation: 在一个示例中，用于上下文自适应熵编码的装置可以包括编码器，其被配置为基于一个或多个初始化参数索引值来确定用于上下文自适应熵编码处理的一个或多个初始化参数。 编码器还可以被配置为基于初始化参数确定用于初始化上下文自适应熵编码处理的一个或多个上下文的一个或多个初始上下文状态。 编码器还可以进一步配置为基于初始上下文状态来初始化上下文。 在一些示例中，初始化参数可以被包括在一个或多个表中，其中为了确定初始化参数，编码器可以被配置为将初始化参数索引值映射到表中的初始化参数。 或者，编码器可以被配置为使用初始化参数索引值和一个或多个公式来计算初始化参数。