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    NON-ZERO ROUNDING AND PREDICTION MODE SELECTION TECHNIQUES IN VIDEO ENCODING
    3.
    发明申请
    NON-ZERO ROUNDING AND PREDICTION MODE SELECTION TECHNIQUES IN VIDEO ENCODING 有权
    视频编码中的非零圆和预测模式选择技术

    公开(公告)号：US20160037181A1

    公开(公告)日：2016-02-04

    申请号：US14880500

    申请日：2015-10-12

    Applicant: QUALCOMM Incorporated

    Inventor： Marta Karczewicz ,  Peisong Chen ,  Yan Ye

    IPC: H04N19/577 ,  H04N19/176 ,  H04N19/44 ,  H04N19/124 ,  H04N19/105 ,  H04N19/91

    CPC classification number: H04N19/577 ,  H04N19/105 ,  H04N19/124 ,  H04N19/147 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/573 ,  H04N19/61 ,  H04N19/91

    Abstract: In one aspect of this disclosure, rounding adjustments to bi-directional predictive data may be purposely eliminated to provide predictive data that lacks any rounding bias. In this case, rounded and unrounded predictive data may both be considered in a rate-distortion analysis to identify the best data for prediction of a given video block. In another aspect of this disclosure, techniques are described for selecting among default weighted prediction, implicit weighted prediction, and explicit weighted prediction. In this context, techniques are also described for adding offset to prediction data, e.g., using the format of explicit weighted prediction to allow for offsets to predictive data that is otherwise determined by implicit or default weighted prediction.

    Abstract translation: 在本公开的一个方面，可以有意地消除对双向预测数据的舍入调整，以提供缺少任何舍入偏差的预测数据。 在这种情况下，可以在速率失真分析中考虑四舍五入和未包围的预测数据，以识别用于预测给定视频块的最佳数据。 在本公开的另一方面，描述了用于在默认加权预测，隐式加权预测和显式加权预测之间进行选择的技术。 在这种情况下，还描述了用于将偏移量添加到预测数据的技术，例如使用显式加权预测的格式来允许否则由隐含或默认加权预测确定的预测数据的偏移。

    SEPARABLE DIRECTIONAL TRANSFORMS
    4.
    发明申请
    SEPARABLE DIRECTIONAL TRANSFORMS 有权
    可分离的方向变换

    公开(公告)号：US20140112387A1

    公开(公告)日：2014-04-24

    申请号：US14142510

    申请日：2013-12-27

    Applicant: QUALCOMM Incorporated

    Inventor： Yan Ye ,  Marta Karczewicz

    IPC: H04N19/61 ,  H04N19/625 ,  H04N19/103

    CPC classification number: H04N19/625 ,  H04N19/103 ,  H04N19/11 ,  H04N19/12 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/18 ,  H04N19/19 ,  H04N19/196 ,  H04N19/197 ,  H04N19/42 ,  H04N19/46 ,  H04N19/463 ,  H04N19/48 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70

    Abstract: This disclosure describes techniques for transforming residual blocks of video data. In particular, a plurality of different transforms selectively applied to the residual blocks based on the prediction mode of the video blocks. At least a portion of the plurality of transforms are separable directional transform specifically trained for a corresponding prediction mode to provide better energy compaction for the residual blocks of the given prediction mode. Using separable directional transforms offers the benefits of lower computation complexity and storage requirement than use of non-separable directional transforms. Additionally, a scan order used to scan the coefficients of the residual block may be adjusted when applying separable directional transforms. In particular, the scan order may be adjusted based on statistics associated with one or more previously coded blocks to better ensure that non-zero coefficients are grouped near the front of the one-dimensional coefficient vector to improve the effectiveness of entropy coding.

    Abstract translation: 本公开描述了用于转换视频数据的残余块的技术。 具体地，基于视频块的预测模式，选择性地将多个不同的变换应用于残差块。 多个变换的至少一部分是针对相应的预测模式进行专门训练的可分离方向变换，以为给定预测模式的残余块提供更好的能量压缩。 使用可分离的方向变换提供了比使用不可分离的方向变换更低的计算复杂度和存储要求的好处。 此外，当应用可分离的方向变换时，可以调整用于扫描残差块的系数的扫描顺序。 特别地，可以基于与一个或多个先前编码的块相关联的统计来调整扫描顺序，以更好地确保非零系数被分组在一维系数向量的前面附近，以提高熵编码的有效性。

    Video coding with large macroblocks
    7.
    发明授权
    Video coding with large macroblocks 有权
    具有大宏块的视频编码

    公开(公告)号：US08948258B2

    公开(公告)日：2015-02-03

    申请号：US13948056

    申请日：2013-07-22

    Applicant: QUALCOMM Incorporated

    Inventor： Peisong Chen ,  Marta Karczewicz ,  Yan Ye

    IPC: G01R31/08 ,  G06F11/00 ,  H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/147 ,  H04N19/61 ,  H04N19/103 ,  H04N19/46

    CPC classification number: H04N19/70 ,  H04N19/103 ,  H04N19/147 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/593 ,  H04N19/61

    Abstract: Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels. In one example, an apparatus includes a video encoder configured to encode a coded unit comprising a plurality of video blocks, wherein at least one of the plurality of video blocks comprises a size of more than 16×16 pixels and to generate syntax information for the coded unit that includes a maximum size value, wherein the maximum size value indicates a size of a largest one of the plurality of video blocks in the coded unit. The syntax information may also include a minimum size value. In this manner, the encoder may indicate to a decoder the proper syntax decoder to apply to the coded unit.

    Abstract translation: 描述了使用比常规视频编码和解码标准规定的宏块大的宏块对数字视频数据进行编码和解码的技术。 例如，这些技术包括使用包括大于16×16像素的宏块对视频流进行编码和解码。 在一个示例中，一种装置包括：视频编码器，被配置为对包括多个视频块的编码单元进行编码，其中所述多个视频块中的至少一个包括大于16×16像素的大小，并且生成用于 编码单元，其包括最大尺寸值，其中所述最大尺寸值指示所述经编码单元中的所述多个视频块中最大的一个的尺寸。 语法信息还可以包括最小大小值。 以这种方式，编码器可以向解码器指示适用于编码单元的适当的语法解码器。

    Rate-distortion defined interpolation for video coding based on fixed filter or adaptive filter
    9.
    发明授权
    Rate-distortion defined interpolation for video coding based on fixed filter or adaptive filter 有权

    公开(公告)号：US10440388B2

    公开(公告)日：2019-10-08

    申请号：US15900720

    申请日：2018-02-20

    Applicant: QUALCOMM Incorporated

    Inventor： Yan Ye ,  Marta Karczewicz

    IPC: H04N19/46 ,  H04N19/82 ,  H04N19/117 ,  H04N19/122 ,  H04N19/147 ,  H04N19/182 ,  H04N19/192 ,  H04N19/523 ,  H04N19/635

    Abstract: This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described.

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