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    Two level last significant coefficient (LSC) position coding
    271.
    发明授权
    Two level last significant coefficient (LSC) position coding 有权
    两级最后有效系数（LSC）位置编码

    公开(公告)号：US09445132B2

    公开(公告)日：2016-09-13

    申请号：US14021589

    申请日：2013-09-09

    Applicant: QUALCOMM Incorporated

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

    IPC: G06K9/72 ,  H04N19/91 ,  H04N19/60 ,  H04N19/13 ,  H04N19/129 ,  H04N19/18

    CPC classification number: H04N19/91 ,  H04N19/129 ,  H04N19/13 ,  H04N19/18 ,  H04N19/60

    Abstract: In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.

    Abstract translation: 在一些示例中，视频编码器采用两级技术来编码信息，该信息根据与该数据块相关联的扫描顺序来识别作为该块的最后有效系数（LSC）的一个系数的变换系数块内的位置 变换系数块。 例如，视频编码器可以对在块内标识包括LSC的子块之一的位置的子块位置进行编码，并对识别子块内的LSC的位置的系数位置进行编码， 包括LSC。

    Sub-PU level advanced residual prediction
    272.
    发明授权
    Sub-PU level advanced residual prediction 有权
    次PU级高级残差预测

    公开(公告)号：US09426465B2

    公开(公告)日：2016-08-23

    申请号：US14463431

    申请日：2014-08-19

    Applicant: QUALCOMM Incorporated

    Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

    IPC: H04N19/51 ,  H04N19/597 ,  H04N19/52 ,  H04N19/96

    CPC classification number: H04N19/52 ,  H04N19/51 ,  H04N19/597 ,  H04N19/96

    Abstract: A prediction unit (PU) of a coding unit (CU) is split into two or more sub-PUs including a first sub-PU and a second sub-PU. A first motion vector of a first type is obtained for the first sub-PU and a second motion vector of the first type is obtained for the second sub-PU. A third motion vector of a second type is obtained for the first sub-PU and a fourth motion vector of the second type is obtained for the second sub-PU, such that the second type is different than the first type. A first portion of the CU corresponding to the first sub-PU is coded according to advanced residual prediction (ARP) using the first and third motion vectors. A second portion of the CU corresponding to the second sub-PU is coded according to ARP using the second and fourth motion vectors.

    Abstract translation: 编码单元（CU）的预测单元（PU）被分成包括第一子PU和第二子PU的两个或更多个子PU。 对于第一子PU获得第一类型的第一运动矢量，并且获得第二子PU的第一类型的第二运动矢量。 对于第一子PU获得第二类型的第三运动矢量，并且为第二子PU获得第二类型的第四运动矢量，使得第二类型不同于第一类型。 对应于第一子PU的CU的第一部分使用第一和第三运动向量根据高级剩余预测（ARP）进行编码。 使用第二和第四运动矢量，根据ARP对与第二子PU相对应的CU的第二部分进行编码。

    Coding of significance flags
    276.
    发明授权
    Coding of significance flags 有权
    重要标志编码

    公开(公告)号：US09350998B2

    公开(公告)日：2016-05-24

    申请号：US13929287

    申请日：2013-06-27

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N7/12 ,  G06K9/46 ,  H04N19/60 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463

    CPC classification number: H04N19/60 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463

    Abstract: A video coder determines, based at least in part on a distance between a current sub-block of a transform coefficient block and a sub-block that contains a last significant coefficient (LSC) of the transform coefficient block, coding contexts for significance flags for transform coefficients of the current sub-block. Furthermore, the video coder entropy codes, based on the coding contexts for the significance flags for the transform coefficients of the current sub-block, the significance flags for the transform coefficients of the current sub-block.

    Abstract translation: 视频编码器至少部分地基于变换系数块的当前子块与包含变换系数块的最后有效系数（LSC）的子块之间的距离来确定用于显示标志的编码上下文 变换当前子块的系数。 此外，视频编码器基于当前子块的变换系数的有效标志的编码上下文，对当前子块的变换系数的有效标志进行熵编码。

    Beta offset control for deblocking filters in video coding
    278.
    发明授权
    Beta offset control for deblocking filters in video coding 有权
    视频编码中去块滤波器的Beta偏移控制

    公开(公告)号：US09344723B2

    公开(公告)日：2016-05-17

    申请号：US13830720

    申请日：2013-03-14

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N7/26 ,  H04N19/80 ,  H04N19/172 ,  H04N19/134 ,  H04N19/117 ,  H04N19/82 ,  H04N19/86

    CPC classification number: H04N19/80 ,  H04N19/117 ,  H04N19/134 ,  H04N19/172 ,  H04N19/82 ,  H04N19/86

    Abstract: Techniques are described for providing continuous control of a deblocking filter for a video block using a beta offset parameter. Deblocking filters are defined based on one or more deblocking decisions. Conventionally, a quantization parameter and a beta offset parameter are used to identify a beta parameter (“β”) value that determines threshold values of the deblocking decisions. The value of the beta offset parameter results in a change or increment of the β value. For small increments of the β value, rounding of the threshold values may result in no change and discontinuous control of the deblocking decisions. The techniques include calculating at least one deblocking decision for the deblocking filter according to a threshold value that has been modified based on a multiplier value of the beta offset parameter. The multiplier value applied to the beta offset parameter causes an integer change in the modified threshold value.

    Abstract translation: 描述了使用β偏移参数来提供用于视频块的去块滤波器的连续控制的技术。 去块滤波器基于一个或多个去块决定来定义。 常规地，使用量化参数和β偏移参数来识别确定解块决策的阈值的β参数（“＆bgr”）值。 β偏移参数的值导致＆bgr的更改或增量; 值。 对于＆bgr的小增量 值，舍入阈值可能导致解调决定的变化和不连续的控制。 这些技术包括根据已经基于β偏移参数的乘数值修改的阈值来计算去块滤波器的至少一个去块决定。 应用于β偏移参数的乘数值会导致修改后的阈值中的整数更改。

    Motion vector rounding
    279.
    发明授权
    Motion vector rounding 有权
    运动矢量四舍五入

    公开(公告)号：US09325991B2

    公开(公告)日：2016-04-26

    申请号：US13860460

    申请日：2013-04-10

    Applicant: QUALCOMM Incorporated

    Inventor： Vadim Seregin ,  Jianle Chen ,  Xianglin Wang ,  Marta Karczewicz

    IPC: H04N7/36 ,  H04N19/51 ,  H04N19/52 ,  H04N19/176 ,  H04N19/513 ,  H04N19/42 ,  H04N19/523

    CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/42 ,  H04N19/513 ,  H04N19/52 ,  H04N19/523

    Abstract: A video decoder determines, based at least in part on a size of a prediction unit (PU), whether to round either or both a horizontal or a vertical component of a motion vector of the PU from sub-pixel accuracy to integer-pixel accuracy. The video decoder generates, based at least in part on the motion vector, a predictive sample block for the PU and generates, based in part on the predictive sample block for the PU, a reconstructed sample block.

    Abstract translation: 视频解码器至少部分地基于预测单元（PU）的大小来确定是否将PU的运动矢量的水平或垂直分量从子像素精度舍入到整数像素精度 。 视频解码器至少部分地基于运动矢量生成PU的预测采样块，并且部分地基于PU的预测采样块产生重建的采样块。

    8-point inverse discrete cosine transform including odd and even portions for media data coding
    280.
    发明授权
    8-point inverse discrete cosine transform including odd and even portions for media data coding 有权
    包括用于媒体数据编码的奇数和偶数部分的8点逆离散余弦变换

    公开(公告)号：US09319685B2

    公开(公告)日：2016-04-19

    申请号：US13765040

    申请日：2013-02-12

    Applicant: Qualcomm Incorporated

    Inventor： Yuriy Reznik ,  Rajan Laxman Joshi ,  Marta Karczewicz

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

    CPC classification number: H04N19/625 ,  G06F17/147 ,  H04N19/60

    Abstract: 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.

    Abstract translation: 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。

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