公开(公告)号：US20230318741A1

公开(公告)日：2023-10-05

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：US20200068196A1

公开(公告)日：2020-02-27

申请号：US16671499

申请日：2019-11-01

Applicant: QUALCOMM Incorporated

Inventor： Li ZHANG ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ ,  Ye-Kui WANG

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/31 ,  H04N19/463 ,  H04N19/82

Abstract: A video coder may reconstruct a current picture of video data. A current region of the current picture is associated with a temporal index indicating a temporal layer to which the current region belongs. Furthermore, for each respective array of a plurality of arrays that correspond to different temporal layers, the video coder may store, in the respective array, sets of adaptive loop filtering (ALF) parameters used in applying ALF filters to samples of regions of pictures of the video data that are decoded prior to the current region and that are in the temporal layer corresponding to the respective array or a lower temporal layer than the temporal layer corresponding to the respective array. The video coder determines, based on a selected set of ALF parameters in the array corresponding to the temporal layer to which the current region belongs, an applicable set of ALF parameters.

公开(公告)号：US20190306503A1

公开(公告)日：2019-10-03

申请号：US16372180

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Jie DONG ,  Yung-Hsuan CHAO ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ ,  Li ZHANG

IPC: H04N19/117 ,  H04N19/159 ,  G06K9/62 ,  H04N19/176

Abstract: Deblocking is a step in video coding for removing distortions that may result from dividing a video frame into blocks, and encoding the video frame based on the blocks. Techniques described herein can include determining the activity in neighboring blocks along the boundary of the blocks, where the activity measures smoothness or complexity of pixels in the boundary area. An average of the activity can then be determined, as well a difference in the activity between the left block and the right block. The average activity and the difference in activity can then be used to determine a classification for the boundary area. The classification can further be used to select a filter to apply to the pixels in the boundary area. Once the filter have been applied, the blocks can be added to a reconstructed video frame.

公开(公告)号：US20130329007A1

公开(公告)日：2013-12-12

申请号：US13796299

申请日：2013-03-12

Applicant: QUALCOMM INCORPORATED

Inventor： Li ZHANG ,  Ying CHEN ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/513 ,  H04N19/52 ,  H04N19/597

Abstract: In general, techniques are described for performing motion vector prediction in 3D video coding and, more particularly for managing a candidate list of motion vector predictors (MVPs) for a block of video data. In some examples, a video coder, such as video encoder or video decoder, includes at least three motion vector predictors (MVPs) in a candidate list of MVPs for a current block in a first view of a current access unit of the video data, wherein the at least three MVPs comprise an inter-view motion vector predictor (IVMP), which is a temporal motion vector derived from a block in a second view of the current access unit or a disparity motion vector derived from a disparity vector.

Abstract translation: 通常，描述了用于在3D视频编码中执行运动矢量预测的技术，更具体地说，用于管理视频数据块的运动矢量预测器（MVP）的候选列表。 在一些示例中，诸如视频编码器或视频解码器的视频编码器在视频数据的当前存取单元的第一视图中包括用于当前块的MVP的候选列表中的至少三个运动矢量预测器（MVP） 其中所述至少三个MVP包括视角间运动向量预测器（IVMP），其是从当前访问单元的第二视图中的块导出的时间运动矢量或从视差矢量导出的视差运动矢量。

公开(公告)号：US20130243093A1

公开(公告)日：2013-09-19

申请号：US13801350

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Ying CHEN ,  Ye-Kui WANG ,  Li ZHANG

IPC: H04N7/26

CPC classification number: H04N19/51 ,  H04N19/105 ,  H04N19/139 ,  H04N19/52 ,  H04N19/597 ,  H04N19/70

Abstract: In one example, a device includes a video coder (e.g., a video encoder or a video decoder) configured to determine that a block of video data is to be coded in accordance with a three-dimensional extension of High Efficiency Video Coding (HEVC), and, based the determination that the block is to be coded in accordance with the three-dimensional extension of HEVC, disable temporal motion vector prediction for coding the block. The video coder may be further configured to, when the block comprises a bi-predicted block (B-block), determine that the B-block refers to a predetermined pair of pictures in a first reference picture list and a second reference picture list, and, based on the determination that the B-block refers to the predetermined pair, equally weight contributions from the pair of pictures when calculating a predictive block for the block.

Abstract translation: 在一个示例中，设备包括被配置为根据高效率视频编码（HEVC）的三维扩展来确定视频数据块要被编码的视频编码器（例如，视频编码器或视频解码器） 并且基于根据HEVC的三维扩展来确定块要被编码的确定，禁止对块进行编码的时间运动矢量预测。 视频编码器还可以被配置为当块包括双预测块（B块）时，确定B块参考第一参考图像列表和第二参考图像列表中的预定图像对， 并且基于当计算块的预测块时，基于B块参考预定对的确定，来自该对图像的同等重量贡献。

公开(公告)号：US20250096960A1

公开(公告)日：2025-03-20

申请号：US18469430

申请日：2023-09-18

Applicant: QUALCOMM Incorporated

Inventor： Kianoush HOSSEINI ,  Jing JIANG ,  Peter GAAL ,  Kazuki TAKEDA ,  Jing LEI ,  Hari SANKAR ,  Li ZHANG

IPC: H04L5/00 ,  H04W72/1273 ,  H04W72/232

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit an indication of a capability of the UE to receive downlink transmissions over a plurality of component carriers with a first quantity of antennas. The UE may receive, in accordance with the indication of the capability of the UE, the downlink transmissions with at least a subset of the first quantity of antennas and over at least a subset of the plurality of component carriers.

公开(公告)号：US20220360365A1

公开(公告)日：2022-11-10

申请号：US17307835

申请日：2021-05-04

Applicant: QUALCOMM Incorporated

Inventor： Shravan Kumar Reddy GARLAPATI ,  Afshin HAFTBARADARAN ,  Alessandro RISSO ,  Li ZHANG

IPC: H04L1/00 ,  H04W72/04 ,  H04W76/11

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving node may determine a cyclic redundancy check (CRC) based at least in part on log-likelihood ratios (LLRs) associated with downlink control information (DCI) received from a transmitting node. The receiving node may perform a full unmasking of the CRC using a radio network temporary identifier (RNTI) based at least in part on a descrambling of the CRC with the RNTI, wherein a number of bits associated with the RNTI is associated with a number of bits associated with the CRC. The receiving node may initiate an early termination of a decoding of the LLRs based at least in part on the full unmasking of the CRC. Numerous other aspects are described.

公开(公告)号：US20210099724A1

公开(公告)日：2021-04-01

申请号：US16982013

申请日：2019-09-26

Applicant: Qualcomm Incorporated

Inventor： Yu HAN ,  Kai ZHANG ,  Li ZHANG ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ

IPC: H04N19/44 ,  H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Methods and devices for decoding including a processor configured to determine which picture is a collocated picture, and determine a location of an associated block of the video data in the collocated picture that corresponds to the current block of video data in the current coding picture, based on using previously decoded blocks in the current coding picture to find an initial motion vector between the associated block in the collocated picture and the current block in the current coding picture, where the associated block of the video data includes at least one first derived motion vector. The processor configured to determine at least one second derived motion vector associated with the current block in the current coding picture, when the initial motion vector points to the collocated picture, based on the at least on first derived motion vector associated with the associated block in the collocated picture.

公开(公告)号：US20180041778A1

公开(公告)日：2018-02-08

申请号：US15665478

申请日：2017-08-01

Applicant: QUALCOMM Incorporated

Inventor： Li ZHANG ,  Wei-Jung CHIEN ,  Xin ZHAO ,  Yi-Wen CHEN ,  Marta KARCZEWICZ

IPC: H04N19/82 ,  H04N19/18 ,  H04N19/17 ,  H04N19/122 ,  H04N19/117 ,  H04N19/147

Abstract: The present disclosure provides various techniques related to adaptive loop filtering (ALF), and particular to geometry transformation-based ALF (GALF). In an aspect, a method for decoding video data includes receiving an encoded bitstream having coded video data from which reconstructed video units are generated, identifying multiple filter supports for the reconstructed video units, and filtering the reconstructed video units using the respective multiple filter supports to produce a decoded video output. Another method includes enabling block-level control of ALF of chroma components for the reconstructed video units, performing, for the reconstructed video units, the block-level ALF for the chroma components when ALF is enabled for one video block and skip performing the block-level ALF for the chroma components when ALF is disabled for another video block, and generating, based on the enabled block-level control of ALF, a decoded video output. Related devices, means, and computer-readable medium are also described.

公开(公告)号：US20160330479A1

公开(公告)日：2016-11-10

申请号：US15108759

申请日：2013-12-30

Applicant: QUALCOMM INCORPORATED

Inventor： Hongbin LIU ,  Ying CHEN ,  Li ZHANG

IPC: H04N19/597 ,  H04N19/13 ,  H04N19/182 ,  H04N19/159 ,  H04N19/91

CPC classification number: H04N19/597 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/70 ,  H04N19/91

Abstract: This disclosure describes techniques for simplifying delta DC residual coding in a 3D video coding process, such as 3D-HEVC. In some examples, the techniques may modify binarization and/or context modeling processes to reduce the complexity of entropy coding of one or more syntax elements used to represent delta DC residual values.

Abstract translation: 本公开描述了用于简化3D视频编码过程（诸如3D-HEVC）中的ΔDC残差编码的技术。 在一些示例中，技术可以修改二值化和/或上下文建模过程以减少用于表示ΔDC残差值的一个或多个语法元素的熵编码的复杂度。