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    CROSS-COMPONENT ADAPTIVE LOOP FILTER IN VIDEO CODING
    31.
    发明申请
    CROSS-COMPONENT ADAPTIVE LOOP FILTER IN VIDEO CODING 有权

    公开(公告)号：US20210152841A1

    公开(公告)日：2021-05-20

    申请号：US17096740

    申请日：2020-11-12

    Applicant: QUALCOMM Incorporated

    Inventor： Nan Hu ,  Vadim Seregin ,  Cheng-Teh Hsieh ,  Marta Karczewicz

    IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/186 ,  H04N19/176

    Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured to: decode a coding tree unit (CTU) of video data, the CTU including a luminance (luma) block and a chrominance (chroma) block, to produce a decoded luma block and a decoded chroma block; determine that a chroma sample of the decoded chroma block is on a first side of an adaptive loop filter (ALF) virtual boundary and that a co-located luma sample of the decoded luma block is on a second side of the ALF virtual boundary, the co-located luma sample being co-located with the chroma sample, the first side being different than the second side; and in response to determining that the chroma sample is on the first side and the luma sample is on the second side, disable cross-component adaptive loop filtering (CC-ALF) for the chroma sample.

    STORING AND RETRIEVING HIGH BIT DEPTH IMAGE DATA
    35.
    发明申请
    STORING AND RETRIEVING HIGH BIT DEPTH IMAGE DATA 审中-公开

    公开(公告)号：US20190098325A1

    公开(公告)日：2019-03-28

    申请号：US15713065

    申请日：2017-09-22

    Applicant: QUALCOMM Incorporated

    Inventor： Cheng-Teh Hsieh ,  In Suk Chong ,  Xianglin Wang

    IPC: H04N19/46 ,  H04N19/70 ,  H04N19/645 ,  H04N19/159

    Abstract: In one example, a device for accessing image data includes a memory configured to store image data and one or more processors configured to code a plurality of bit length values for a plurality of block fixed length code length (bflc_len) values for a plurality of blocks of a tile or sub-tile of an image, the bit length values representing numbers of bits used to code the blfc_len values, code the bflc_len values for each of the plurality of blocks such that the bflc_len values have numbers of bits indicated by the respective bit length values, code the codewords for each of the plurality of blocks such that the codewords have the numbers of bits indicated by the bflc_len values for corresponding blocks of the plurality of blocks, and access the bit length values, the bflc_len values, and the codewords in the memory.

    INTRA PREDICTION TECHNIQUES FOR VIDEO CODING
    37.
    发明申请
    INTRA PREDICTION TECHNIQUES FOR VIDEO CODING 审中-公开

    公开(公告)号：US20180199062A1

    公开(公告)日：2018-07-12

    申请号：US15866287

    申请日：2018-01-09

    Applicant: QUALCOMM Incorporated

    Inventor： Kai Zhang ,  Jianle Chen ,  Vadim Seregin ,  Hsiao-Chiang Chuang ,  Xiang Li ,  Li Zhang ,  Cheng-Teh Hsieh ,  Marta Karczewicz

    IPC: H04N19/593 ,  H04N19/59 ,  H04N19/13 ,  H04N19/96

    Abstract: A video decoder determines a current block of a current picture of video data has a size of P×Q, wherein P is a first value corresponding to a width of the current block and Q is a second value corresponding to a height of the current block, wherein P is not equal to Q, wherein the current block includes a short side and a long side, and wherein the first value added to the second value does not equal a value that is a power of 2; decodes the current block of video data using intra DC mode prediction, wherein decoding the current block of video data using intra DC mode prediction comprises performing a shift operation to calculate a DC value and generating a prediction block for the current block of video data using the calculated DC value; and outputs a decoded version of the current picture.

    CONSTRAINED INTRA-PREDICTION FOR BLOCK COPY MODE
    38.
    发明申请
    CONSTRAINED INTRA-PREDICTION FOR BLOCK COPY MODE 审中-公开

    公开(公告)号：US20170099490A1

    公开(公告)日：2017-04-06

    申请号：US15273514

    申请日：2016-09-22

    Applicant: QUALCOMM Incorporated

    Inventor： Vadim Seregin ,  Krishnakanth Rapaka ,  Rajan Joshi ,  Cheng-Teh Hsieh ,  Marta Karczewicz

    IPC: H04N19/159 ,  H04N19/172 ,  H04N19/186 ,  H04N19/176

    CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/70

    Abstract: Systems and methods are provided for video encoding and decoding using intra-block copy mode when constrained intra-prediction is enabled. In various implementations, a video encoding device can determine a current coding unit for a picture from a plurality of pictures. The video encoding device can further determine that constrained intra-prediction mode is enabled. The video encoding device can further encode the current coding unit using one or more reference samples. The one or more reference samples are determined based on whether a reference sample has been predicted using intra-block copy mode prediction without using any inter-predicted samples. When the reference sample is predicted using intra-block copy mode without using any inter-predicted samples, the reference sample is available for predicting the current coding unit. When the reference sample is predicted using intra-block copy mode using at least one inter-predicted sample, the reference sample is not available for predicting the coding unit.

    SYSTEMS AND METHODS FOR INTRA-BLOCK COPY
    39.
    发明申请
    SYSTEMS AND METHODS FOR INTRA-BLOCK COPY 审中-公开
    内部复制的系统和方法

    公开(公告)号：US20150373358A1

    公开(公告)日：2015-12-24

    申请号：US14743253

    申请日：2015-06-18

    Applicant: QUALCOMM Incorporated

    Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

    IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172

    CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/593

    Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

    Abstract translation: 提供技术和系统用于对视频数据进行编码和解码。 例如，描述了对包括多个图像的视频数据进行编码的方法。 该方法包括对一幅图像的块执行画面内预测，以生成预测单元。 执行图像内预测包括选择用于编码树单元（CTU）的块内复制预测的参考块。 从多个编码块中选择参考块，并且将用双预测编码的CTU内的块从选择中排除为参考块。 执行图像内预测还包括利用所选择的参考块执行块内复制预测以生成预测单元。 该方法还包括基于所执行的图像内预测来生成编码预测单元的语法元素。

    SYSTEMS AND METHODS FOR INTRA-BLOCK COPY
    40.
    发明申请
    SYSTEMS AND METHODS FOR INTRA-BLOCK COPY 审中-公开
    内部复制的系统和方法

    公开(公告)号：US20150373357A1

    公开(公告)日：2015-12-24

    申请号：US14743176

    申请日：2015-06-18

    Applicant: QUALCOMM Incorporated

    Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

    IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52

    CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/593

    Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

    Abstract translation: 提供技术和系统用于对视频数据进行编码和解码。 例如，编码视频数据的方法包括：在编码器处获得视频数据，并且使用块内复制预测确定对视频数据执行画面内预测，以生成多个编码视频图像。 该方法还包括使用块内复制预测对视频数据进行图像内预测，并且响应于使用块内复制预测确定对视频数据执行图像内预测，至少禁用 对于多个经编码的视频图像中的一个图像间预测或图像间预测。 该方法还包括根据所执行的块内复制预测，基于接收到的视频数据生成多个编码视频图像。

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