公开(公告)号：US20190141320A1

公开(公告)日：2019-05-09

申请号：US16182364

申请日：2018-11-06

Applicant: QUALCOMM Incorporated

Inventor： Ye-Kui WANG ,  Wei-Jung CHIEN ,  Yi-Wen CHEN ,  Marta KARCZEWICZ

IPC: H04N19/115 ,  H04N19/137 ,  H04N19/177 ,  H04N19/172

Abstract: A coding device configured to code video data that includes a buffer memory configured to store pictures of the video data and a at least one processor implemented in circuitry that is in communication with the buffer memory such that the processor is configured to code at least two pictures of a single coded video sequence (CVS) of the video data where each picture of the at least two pictures is associated with an identical picture order count (POC) value and where the at least two pictures are different from one another, associate respective data with each of the at least two pictures of the single CVS, and identify, for inclusion in a reference picture set, at least one picture among the at least two pictures based on the identical POC value associated with the at least two pictures and the respective data associated with the at least one picture.

公开(公告)号：US20190124330A1

公开(公告)日：2019-04-25

申请号：US16156894

申请日：2018-10-10

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung CHIEN ,  Kai ZHANG ,  Yi-Wen CHEN ,  Marta KARCZEWICZ

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/174 ,  H04N19/103

Abstract: Provided are systems, methods, and computer-readable medium for encoding and decoding video data. In various examples, a coding device can include multiple luma QP and chroma QP relationship tables. In performing quantization or inverse quantization one video data being encoded or decoded, respectively, the coding device can select a table. The table can be selected based on, for example, a slice type, a prediction mode, and/or a luminance value, among other factors. The coding device can then use the luma QP value to look up a chroma QP value from the table. The luma QP and chroma QP values can then be used in quantization or inverse quantization.

公开(公告)号：US20180041779A1

公开(公告)日：2018-02-08

申请号：US15665492

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：US20140003532A1

公开(公告)日：2014-01-02

申请号：US13929198

申请日：2013-06-27

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd COBAN ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ

IPC: H04N7/26

CPC classification number: H04N19/463 ,  H04N19/174 ,  H04N19/436 ,  H04N19/91

Abstract: The techniques of this disclosure allow for wavefront parallel processing of video data with limited synchronization points. In one example, a method of decoding video data comprises synchronizing decoding of a first plurality of video block rows at a beginning of each video block row in the first plurality of video block rows, decoding the first plurality of video block rows in parallel, wherein decoding does not include any synchronization between any subsequent video block in the first plurality of video block rows, and synchronizing decoding of a second plurality of video block rows at a beginning of each video block row in the second plurality of video block rows.

Abstract translation: 本公开的技术允许具有有限同步点的视频数据的波前并行处理。 在一个示例中，解码视频数据的方法包括在第一多个视频块行中的每个视频块行的开始处对第一多个视频块行进行同步解码，并行解码第一多个视频块行，其中 解码不包括第一多个视频块行中的任何后续视频块之间的任何同步，并且在第二多个视频块行中的每个视频块行的开始处同步第二多个视频块行的解码。

公开(公告)号：US20130272424A1

公开(公告)日：2013-10-17

申请号：US13863160

申请日：2013-04-15

Applicant: QUALCOMM INCORPORATED

Inventor： Joel SOLE ROJALS ,  Jianle CHEN ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ

IPC: H04N7/50

CPC classification number: H04N19/61 ,  H04N19/129 ,  H04N19/18 ,  H04N19/467 ,  H04N19/48

Abstract: This disclosure proposes techniques for encoding and decoding transform coefficients in a video coding process. In particular, this disclosure proposes techniques determining whether or not to apply a sign data hiding process for a group of transform coefficients, and techniques for applying the sign data hiding process. In one example, this disclosure describes a method for decoding video data comprising determining a block of transform coefficients, determining whether to perform a sign data hiding process for at least one transform coefficient in the block of transform coefficients based on a single variable compared to a threshold, and decoding sign information for the block based on the determination of whether to perform the sign data hiding process.

Abstract translation: 本公开提出了在视频编码处理中对变换系数进行编码和解码的技术。 具体地，本公开提出了确定是否对一组变换系数应用符号数据隐藏处理的技术以及用于应用符号数据隐藏处理的技术。 在一个示例中，本公开描述了一种用于对视频数据进行解码的方法，包括：确定变换系数块，确定是否对变换系数块中的至少一个变换系数执行符号数据隐藏处理，基于与 基于是否执行符号数据隐藏处理的确定，对块的阈值和解码符号信息。

公开(公告)号：US20210274189A1

公开(公告)日：2021-09-02

申请号：US17321302

申请日：2021-05-14

Applicant: Qualcomm Incorporated

Inventor： Vadim SEREGIN ,  Wei-Jung CHIEN ,  Han HUANG ,  Marta KARCZEWICZ

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423 ,  H04N19/119

Abstract: A video coder can be configured to code video data by determining a first block size threshold for a block of video data; determining a second block size threshold, wherein the second block size threshold is smaller than the first block size threshold; partitioning the block of video data into smaller sub-blocks; in response to determining that a first partition of the partitioned block is smaller or equal to the first block size threshold, determining that blocks within the partition belong to a parallel estimation area; and in response to determining that a second partition of the partitioned block is smaller or equal to the second block size threshold, determining that blocks within the second partition belong to an area for a shared candidate list.

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：US20190387247A1

公开(公告)日：2019-12-19

申请号：US16443113

申请日：2019-06-17

Applicant: QUALCOMM Incorporated

Inventor： Han HUANG ,  Wei-Jung CHIEN ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/61 ,  H04N19/107

Abstract: A method of decoding video data comprising parsing a sub-prediction unit motion flag from received encoded video data, deriving a list of sub-prediction unit level motion prediction candidates if the sub-prediction unit motion flag is active, deriving a list of prediction unit level motion prediction candidates if the sub-prediction unit motion flag is not active, and decoding the encoded video data using a selected motion vector predictor.

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：US20130272423A1

公开(公告)日：2013-10-17

申请号：US13862818

申请日：2013-04-15

Applicant: QUALCOMM INCORPORATED

Inventor： Wei-Jung CHIEN ,  Joel SOLE ROJALS ,  Jianle CHEN ,  Rajan Laxman JOSHI ,  Marta KARCZEWICZ

IPC: H04N7/30

CPC classification number: H04N19/60 ,  H03M7/40 ,  H03M7/4018 ,  H04N19/102 ,  H04N19/129 ,  H04N19/13 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18

Abstract: Techniques are described for determining a scan order for transform coefficients of a block. The techniques may determine context for encoding or decoding significance syntax elements for the transform coefficients based on the determined scan order. A video encoder may encode the significance syntax elements and a video decoder may decode the significance syntax elements based on the determined contexts.

Abstract translation: 描述了用于确定块的变换系数的扫描顺序的技术。 这些技术可以基于所确定的扫描顺序来确定用于对变换系数的重要性语法元素进行编码或解码的上下文。 视频编码器可以对重要性语法元素进行编码，并且视频解码器可以基于所确定的上下文来解码重要语法元素。