QUANTIZATION IN VIDEO CODING
    61.
    发明申请
    QUANTIZATION IN VIDEO CODING 有权
    视频编码中的量化

    公开(公告)号:US20130051457A1

    公开(公告)日:2013-02-28

    申请号:US13531106

    申请日:2012-06-22

    IPC分类号: H04N7/26

    摘要: In an example, aspects of this disclosure relate to a method of coding video data that includes determining a quantization parameter (QP) for coding residual video data, where the QP is indexed to a quantizer step size. The method also includes determining a quantization scaling value for scaling the quantizer step size, and applying the quantization scaling value scaling to the quantizer step size. The method also includes coding the residual video data using the scaled quantizer step size.

    摘要翻译: 在一个示例中,本公开的方面涉及一种对视频数据进行编码的方法,该方法包括确定用于对剩余视频数据进行编码的量化参数(QP),其中QP被索引到量化器步长。 该方法还包括确定用于缩放量化器步长的量化缩放值,以及将量化缩放值缩放应用于量化器步长。 该方法还包括使用缩放的量化器步长对剩余视频数据进行编码。

    APPLYING NON-SQUARE TRANSFORMS TO VIDEO DATA
    62.
    发明申请
    APPLYING NON-SQUARE TRANSFORMS TO VIDEO DATA 有权
    将非正方形变换应用于视频数据

    公开(公告)号:US20130003824A1

    公开(公告)日:2013-01-03

    申请号:US13422828

    申请日:2012-03-16

    IPC分类号: H04N7/30 H04N7/32 H04N11/02

    摘要: In one example, a device for coding video data includes a video coder, such as a video encoder or a video decoder, that is configured to code information indicative of whether a transform unit of the video data is square or non-square, and code data of the transform unit based at least in part on whether the transform unit is square or non-square. In this manner, the video coder may utilize non-square transform units. The video coder may be configured to use non-square transform units for certain situations, such as only for chrominance or luminance components or only when a corresponding prediction unit is non-square. The video coder may further be configured to perform an entropy coding process that selects context for coding data of the transform unit based on whether the transform unit is square or non-square.

    摘要翻译: 在一个示例中,用于编码视频数据的设备包括诸如视频编码器或视频解码器的视频编码器,其被配置为对指示视频数据的变换单元是正方形还是非正方形的信息进行编码,以及代码 所述变换单元的数据至少部分地基于所述变换单元是平方还是非正方形。 以这种方式,视频编码器可以利用非正方形变换单元。 视频编码器可以被配置为在诸如仅用于色度或亮度分量的某些情况下使用非平方变换单元,或者仅当对应的预测单元是非正方形时才使用。 视频编码器还可以被配置为执行熵编码处理,其基于变换单元是正方形还是非正方形来选择用于对变换单元的数据进行编码的上下文。

    CODEWORD ADAPTATION FOR VARIABLE LENGTH CODING
    64.
    发明申请
    CODEWORD ADAPTATION FOR VARIABLE LENGTH CODING 审中-公开
    可变长度编码的编码器适配

    公开(公告)号:US20120147947A1

    公开(公告)日:2012-06-14

    申请号:US13228875

    申请日:2011-09-09

    IPC分类号: H04N7/26 H03M7/40

    CPC分类号: H03M7/40 H03M7/42 H04N19/91

    摘要: In one example, this disclosure describes a method of codeword adaptation for variable length coding. The method includes applying a first codeword adaptation scheme to groups of codewords in a variable length coding (VLC) table to change mappings of codewords within the groups to events in the VLC table; and applying a second codeword adaptation scheme to individual codewords within the groups of codewords in the VLC table to change mappings of the codewords to the events within the groups in the VLC table.

    摘要翻译: 在一个示例中,本公开描述了用于可变长度编码的码字适配的方法。 所述方法包括:在可变长度编码(VLC)表中应用码字组适配方案以改变所述组内的码字的映射到所述VLC表中的事件; 以及将所述VLC表中的码字组内的各个码字应用第二码字适配方案,以将所述码字的映射改变为所述VLC表中的组内的事件。

    JOINT CODING OF SYNTAX ELEMENTS FOR VIDEO CODING
    65.
    发明申请
    JOINT CODING OF SYNTAX ELEMENTS FOR VIDEO CODING 有权
    用于视频编码的语音元素的联合编码

    公开(公告)号:US20120106649A1

    公开(公告)日:2012-05-03

    申请号:US13283335

    申请日:2011-10-27

    IPC分类号: H04N7/30 H04N11/02

    摘要: In one example, a video decoder is configured to determine whether a component of a transform unit of a coding unit of video data includes at least one non-zero coefficient based on a codeword for the transform unit, determine whether the transform unit is split into sub-transform units based on the codeword, and decode the transform unit based on the determinations. In another example, a video encoder is configured to determine whether a component of a transform unit of a coding unit of video data includes at least one non-zero coefficient, determine whether the transform unit is split into sub-transform units, select a codeword from a variable length code table, wherein the variable length code table provides an indication that the codeword corresponds to the determinations, and provide the codeword for the transform unit.

    摘要翻译: 在一个示例中,视频解码器被配置为基于用于变换单元的码字来确定视频数据的编码单元的变换单元的分量是否包括至少一个非零系数,确定变换单元是否被分成 基于码字的子变换单元,并且基于确定来解码变换单元。 在另一示例中,视频编码器被配置为确定视频数据的编码单元的变换单元的分量是否包括至少一个非零系数,确定变换单元是否被分割成子变换单元,选择码字 从可变长度码表中,其中,所述可变长度码表提供所述码字对应于所述确定的指示,并且提供所述变换单元的码字。

    INTRA SMOOTHING FILTER FOR VIDEO CODING
    66.
    发明申请
    INTRA SMOOTHING FILTER FOR VIDEO CODING 有权
    INTRA SMOOTHING过滤器用于视频编码

    公开(公告)号:US20120082224A1

    公开(公告)日:2012-04-05

    申请号:US13248968

    申请日:2011-09-29

    IPC分类号: H04N7/32

    摘要: This disclosure relates to techniques for reducing the amount of additional data encoded with a block encoded using intra-predictive coding. Particularly, the techniques provide apparatus and methods of applying a smoothing filter to prediction samples used in intra-predictive coding. For example, in fixed mode-dependent intra-predictive coding, a video encoder may determine the type of smoothing filter applied to prediction samples based on block size and intra-prediction mode combination associated with the current block, where the combination is used to look up a filter in a first filter table. In adaptive mode-dependent intra-predictive coding, the encoder uses two filters, one from the first filter table and another from a second filter table, applies both filters, and determines which yields better results. When the second filter table filter yields better results, the encoder encodes a filtering indication. When a filter from the first filter table is used, no filtering indication is encoded.

    摘要翻译: 本公开涉及用于减少使用内部预测编码编码的块编码的附加数据的量的技术。 特别地,这些技术提供了将平滑滤波器应用于在帧内预测编码中使用的预测样本的装置和方法。 例如,在固定模式相关的帧内预测编码中,视频编码器可以基于与当前块相关联的块大小和帧内预测模式组合来确定应用于预测样本的平滑滤波器的类型,其中组合被用于查找 在第一个过滤器表中添加一个过滤器。 在自适应模式相关的帧内预测编码中,编码器使用两个滤波器,一个来自第一个滤波器表,另一个来自第二个滤波器表,两个滤波器都应用两个滤波器,并确定哪个产生更好的结果。 当第二滤波器表滤波器产生更好的结果时,编码器对滤波指示进行编码。 当使用来自第一滤波器表的滤波器时,不对滤波指示进行编码。

    CODING PREDICTION MODES IN VIDEO CODING
    67.
    发明申请
    CODING PREDICTION MODES IN VIDEO CODING 有权
    视频编码中的编码预测模式

    公开(公告)号:US20120082210A1

    公开(公告)日:2012-04-05

    申请号:US13248653

    申请日:2011-09-29

    IPC分类号: H04N7/32 H04N7/26

    摘要: A video encoder can maintain, by generating, storing, adjusting, altering, and/or updating, one or more variable length coding (VLC) tables that represent a mapping of prediction modes to codewords. One or more codewords representing a selected prediction mode can be communicated to the decoder for a CU of a frame. The decoder maintains one or more VLC tables that match the VLC tables maintained by the video encoder. Thus, based on the one or more codewords received from the video encoder, the video decoder can determine the prediction mode used to encode a CU.

    摘要翻译: 视频编码器可以通过生成,存储,调整,改变和/或更新表示将预测模式映射到码字的一个或多个可变长度编码(VLC)表来维持。 表示所选择的预测模式的一个或多个码字可以被传送到解码器,用于帧的CU。 解码器维护与视频编码器维护的VLC表匹配的一个或多个VLC表。 因此,基于从视频编码器接收的一个或多个码字,视频解码器可以确定用于编码CU的预测模式。

    CODING MOTION PREDICTION DIRECTION IN VIDEO CODING
    68.
    发明申请
    CODING MOTION PREDICTION DIRECTION IN VIDEO CODING 有权
    编码运动预测方向在视频编码

    公开(公告)号:US20120027088A1

    公开(公告)日:2012-02-02

    申请号:US13179400

    申请日:2011-07-08

    IPC分类号: H04N7/32

    摘要: This disclosure relates to techniques for reducing a cost of coding prediction information in video coding. Video blocks in a generalized P/B (GPB) frame are encoded using up to two motion vectors calculated from reference pictures in two separate reference picture lists that are identical. When one of the reference picture lists is preferred over the other reference picture list, the preferred reference picture list may be used for unidirectional prediction, by default. When a GPB frame is enabled such that the first and second reference picture lists are identical, either of the first and second reference picture lists may be used for unidirectional prediction. The techniques include coding one or more syntax elements indicating that a video block is coded using one of the unidirectional prediction mode with respect to a reference picture in a reference picture list and the bidirectional prediction mode using less than two bits.

    摘要翻译: 本公开涉及用于降低视频编码中的预测信息编码成本的技术。 广义P / B(GPB)帧中的视频块使用相同的两个单独参考图片列表中的参考图片计算的最多两个运动矢量进行编码。 当参考图像列表中的一个优于另一个参考图像列表时,默认情况下优选的参考图像列表可用于单向预测。 当启用GPB帧使得第一和第二参考图片列表相同时,第一和第二参考图片列表中的任一个可以用于单向预测。 这些技术包括编码一个或多个语法元素,其指示使用单向预测模式中的一个相对于参考图像列表中的参考图像和使用少于两个比特的双向预测模式来编码视频块。

    INTER-LAYER PREDICTION FOR EXTENDED SPATIAL SCALABILITY IN VIDEO CODING
    69.
    发明申请
    INTER-LAYER PREDICTION FOR EXTENDED SPATIAL SCALABILITY IN VIDEO CODING 有权
    在视频编码中扩展空间尺度的层间预测

    公开(公告)号:US20080165855A1

    公开(公告)日:2008-07-10

    申请号:US11970486

    申请日:2008-01-07

    IPC分类号: H04N7/32 H04N7/26

    摘要: An improved system and method for providing improved inter-layer prediction for extended spatial scalability in video coding, as well as improving inter-layer prediction for motion vectors in the case of extended spatial scalability. In various embodiments, for the prediction of macroblock mode, the actual reference frame index and motion vectors from the base layer are used in determining if two blocks should be merged. Additionally, multiple representative pixels in a 4×4 block can be used to represent each 4×4 block in a virtual base layer macroblock. The partition and motion vector information for the relevant block in the virtual base layer macroblock can be derived from all of the partition information and motion vectors of those 4×4 blocks.

    摘要翻译: 一种用于在视频编码中提供改进的层间预测以提高空间可扩展性的改进的系统和方法,以及在扩展的空间可扩展性的情况下改进运动矢量的层间预测。 在各种实施例中,为了预测宏块模式,使用实际参考帧索引和来自基本层的运动矢量来确定是否应该合并两个块。 此外,4×4块中的多个代表性像素可用于表示虚拟基本层宏块中的每个4×4块。 虚拟基层宏块中的相关块的分区和运动矢量信息可以从所有这些4×4块的分区信息和运动矢量导出。

    SCALABLE VIDEO CODING AND DECODING
    70.
    发明申请
    SCALABLE VIDEO CODING AND DECODING 审中-公开
    可扩展的视频编码和解码

    公开(公告)号:US20080013623A1

    公开(公告)日:2008-01-17

    申请号:US11777556

    申请日:2007-07-13

    IPC分类号: H04B1/66 H04N11/04 H04N7/12

    摘要: An improved system and method for effectively reducing prediction drift and improving coding efficiency in scalable video coding. The present invention provides an improved method for determining an offset value that is used to adjust the value of α, a leaky factor for a block of data that includes only zero coefficients at a base layer. In one embodiment of the invention, the offset value is determined based upon information in the enhancement layer at issue instead of the base layer. In another embodiment, information in both the enhancement layer and the base layer of the current frame is used in determining the offset value.

    摘要翻译: 一种改进的系统和方法,用于有效降低可扩展视频编码中的预测漂移和提高编码效率。 本发明提供了一种用于确定用于调整α值的偏移值的改进方法,即在基层仅包括零系数的数据块的泄漏因子。 在本发明的一个实施例中,基于所涉及的增强层中的信息而不是基本层来确定偏移值。 在另一个实施例中,当前帧的增强层和基本层中的信息用于确定偏移值。