公开(公告)号：US20140161175A1

公开(公告)日：2014-06-12

申请号：US14098357

申请日：2013-12-05

Applicant: QUALCOMM INCORPORATED

Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/597 ,  H04N19/105

CPC classification number: H04N19/31 ,  H04N19/103 ,  H04N19/105 ,  H04N19/107 ,  H04N19/136 ,  H04N19/176 ,  H04N19/187 ,  H04N19/30 ,  H04N19/577 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70

Abstract: In an example, a method of coding video data includes determining a partition mode for coding a block of video data, where the partition mode indicates a division of the block of video data for predictive coding. The method also includes determining whether to code a weighting factor for an inter-view residual prediction process based on the partition mode, where, when the weighting factor is not coded, the inter-view residual prediction process is not applied to predict a residual for the block. The method also includes coding the block of video data with the determined partition mode.

Abstract translation: 在一个示例中，视频数据的编码方法包括：确定用于对视频数据块进行编码的分区模式，其中分割模式指示用于预测编码的视频数据块的划分。 该方法还包括基于分区模式来确定是否对视角间残差预测处理的加权因子进行编码，其中，当加权因子未被编码时，未应用视角间残差预测处理来预测残差， 块。 该方法还包括用确定的分区模式对视频数据块进行编码。

公开(公告)号：US20140139627A1

公开(公告)日：2014-05-22

申请号：US14084347

申请日：2013-11-19

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Jewon Kang ,  Li Zhang

IPC: H04N13/00

CPC classification number: H04N13/161 ,  H04N19/105 ,  H04N19/176 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70

Abstract: A method of coding video data includes deriving prediction weights for illumination compensation of luma samples of a video block partition once for the video block partition such that the video block partition has a common set of prediction weights for performing illumination compensation of the luma samples regardless of a transform size for the video block partition, calculating a predicted block for the video block partition using the prediction weights using illumination compensation, and coding the video block partition using the predicted block.

Abstract translation: 一种编码视频数据的方法包括导出用于视频块分区的视频块分区一次的亮度样本的照明补偿的预测权重，使得视频块分区具有用于执行亮度样本的照明补偿的公共预测权重集，而不管 视频块分割的变换大小，使用照明补偿使用预测权重计算视频块分割的预测块，以及使用预测块对视频块分割进行编码。

公开(公告)号：US20140098882A1

公开(公告)日：2014-04-10

申请号：US14045705

申请日：2013-10-03

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen

IPC: H04N7/26 ,  H04N7/36

CPC classification number: H04N19/44 ,  H04N13/161 ,  H04N19/105 ,  H04N19/119 ,  H04N19/52 ,  H04N19/521 ,  H04N19/597

Abstract: For a depth block in a depth view component, a video coder derives a motion information candidate that comprises motion information of a corresponding texture block in a decoded texture view component, adds the motion information candidate to a candidate list for use in a motion vector prediction operation, and codes the current block based on a candidate in the candidate list.

Abstract translation: 对于深度视图分量中的深度块，视频编码器导出包括解码纹理视图分量中的对应纹理块的运动信息的运动信息候选，将运动信息候选添加到运动矢量预测中使用的候选列表 操作，并且基于候选列表中的候选来对当前块进行编码。

公开(公告)号：US20130148722A1

公开(公告)日：2013-06-13

申请号：US13705853

申请日：2012-12-05

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/50 ,  H04N19/597 ,  H04N19/70

Abstract: A video encoder generates a bitstream that includes a reference picture list modification (RPLM) command. The RPLM command belongs to a type of RPLM commands for inserting short-term reference pictures into reference picture lists. The RPLM command instructs a video decoder to insert a synthetic reference picture into the reference picture list. The video decoder decodes, based at least in part on syntax elements parsed from the bitstream, one or more view components and generates, based at least in part on the one or more view components, the synthetic reference picture. The video decoder modifies, in response to the RPLM commands, a reference picture list to include the synthetic reference picture. The video decoder may use one or more pictures in the reference picture list as reference pictures to perform inter prediction on one or more video blocks of a picture.

Abstract translation: 视频编码器生成包括参考图像列表修改（RPLM）命令的比特流。 RPLM命令属于用于将短期参考图像插入到参考图片列表中的RPLM命令的类型。 RPLM命令指示视频解码器将合成参考图像插入到参考图像列表中。 视频解码器至少部分地基于从比特流解析的语法元素解码一个或多个视图分量，并且至少部分地基于一个或多个视图组件生成合成参考图片。 视频解码器响应于RPLM命令修改参考图片列表以包括合成参考图片。 视频解码器可以使用参考图像列表中的一个或多个图像作为参考图像来对图像的一个或多个视频块执行帧间预测。

公开(公告)号：US12075037B2

公开(公告)日：2024-08-27

申请号：US17810969

申请日：2022-07-06

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei-Jung Chien ,  Li Zhang

IPC: H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  G06T5/70 ,  H04N19/587

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  G06T5/70 ,  H04N19/587

Abstract: An example device for filtering a decoded block of video data includes one or more processing units configured to construct filters for classes of blocks of a current picture of video data. To construct filters for each of the classes, the processing units are configured to determine a value of a flag that indicates whether a fixed filter is used to predict a set of filter coefficients of the class, and in response to the fixed filter being used to predict the set of filter coefficients, determine an index value into a set of fixed filters and predict the set of filter coefficients of the class using a fixed filter of the set of fixed filters identified by the index value.

公开(公告)号：US11870576B2

公开(公告)日：2024-01-09

申请号：US17657115

申请日：2022-03-29

Applicant: QUALCOMM Incorporated

Inventor： Hobin Kim ,  Hari Sankar ,  Alessandro Risso ,  Harsha Acharya ,  Alexei Yurievitch Gorokhov ,  Li Zhang

IPC: H04L1/00

CPC classification number: H04L1/0061 ,  H04L1/0068

Abstract: An apparatus for wireless communication is provided. The apparatus may be a receiver device that includes an error correction decoder, such as a low-density parity check (LDPC) decoder. The apparatus may achieve power savings and/or operation cycle savings by disabling the error correction decoder in scenarios where bits of a codeword in a signal transmission are received without errors. The apparatus obtains a first set of bits of a codeword, wherein the codeword includes the first set of bits and a second set of bits, and wherein the second set of bits is punctured. The apparatus recovers the second set of bits based on at least the first set of bits and determines whether to operate an error correction decoder based on a result of an error detection operation performed on the codeword using the first set of bits and the second set of bits.

公开(公告)号：US11563938B2

公开(公告)日：2023-01-24

申请号：US15432839

申请日：2017-02-14

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei-Jung Chien ,  Li Zhang

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/70 ,  H04N19/82 ,  H04N19/463 ,  H04N19/136 ,  H04N19/176 ,  H04N19/80

Abstract: An example device for filtering a decoded block of video data includes one or more processors implemented in circuitry and configured to decode a current block of a current picture of the video data, select a filter (such as an adaptive loop filter) to be used to filter pixels of the current block, calculate a gradient of at least one pixel for the current block, select a geometric transform to be performed on one of a filter support region or coefficients of the selected filter, wherein the one or more processors are configured to select the geometric transform that corresponds to an orientation of the gradient of the at least one pixel, perform the geometric transform on either the filter support region or the coefficients of the selected filter, and filter the at least one pixel of the current block using the selected filter after performing the geometric transform.

公开(公告)号：US11463689B2

公开(公告)日：2022-10-04

申请号：US15184118

申请日：2016-06-16

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/82 ,  H04N19/136 ,  H04N19/117 ,  H04N19/182 ,  H04N19/59 ,  H04N19/159 ,  H04N19/593 ,  H04N19/139 ,  H04N19/174 ,  H04N19/70

Abstract: A device for decoding video data includes a memory configured to store the video data; and one or more processors configured to decode syntax information that indicates a selected intra prediction mode for the block of video data from among a plurality of intra prediction modes. The one or more processors apply an N-tap intra interpolation filter to neighboring reconstructed samples of the block of video data according to the selected intra prediction mode, wherein N is greater than 2. The one or more processors reconstruct the block of video data based on the filtered neighboring reconstructed samples according to the selected intra prediction mode.

公开(公告)号：US11418294B2

公开(公告)日：2022-08-16

申请号：US17021361

申请日：2020-09-15

Applicant: QUALCOMM Incorporated

Inventor： Cunzhen Liu ,  Alessandro Risso ,  Li Zhang

IPC: H04L1/18 ,  H04L1/00

Abstract: An apparatus (e.g., receive chain) for wireless communications may perform de-interleaving, de-rate matching, and hybrid automatic repeat request (HARQ) combining in a single step. The apparatus may include a data pool configured to store HARQ log likelihood ratio (LLR) data from previous transmissions. The apparatus may include a HARQ onload controller configured to load HARQ LLR data from the HARQ data pool into a HARQ buffer. The apparatus may include an LLR buffer configured to store received demodulated, interleaved, and rate matched LLR data. The apparatus may include a plurality of processing engines configured to, starting at different locations of the LLR buffer: receive new input data from the LLR buffer; combine the HARQ LLR data from the HARQ buffer with the new input data to generate de-interleaved, de-rate matched, and HARQ combined data; and write the de-interleaved, de-rate matched, and HARQ combined data into the HARQ buffer.

公开(公告)号：US11330284B2

公开(公告)日：2022-05-10

申请号：US15080480

申请日：2016-03-24

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Ying Chen ,  Li Zhang ,  Hongbin Liu ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/513 ,  H04N19/70 ,  H04N19/56 ,  H04N19/46 ,  H04N19/96 ,  H04N19/109 ,  H04N19/57 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44

Abstract: In an example, a method of processing video data includes splitting a current block of video data into a plurality of sub-blocks for deriving motion information of the current block, where the motion information indicates motion of the current block relative to reference video data. The method also includes deriving, separately for each respective sub-block of the plurality of sub-blocks, motion information comprising performing a motion search for a first set of reference data that corresponds to a second set of reference data outside of each respective sub-block. The method also includes decoding the plurality of sub-blocks based on the derived motion information and without decoding syntax elements representative of the motion information.