公开(公告)号：US20210385472A1

公开(公告)日：2021-12-09

申请号：US17338468

申请日：2021-06-03

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Yong HE ,  Muhammed Zeyd COBAN

IPC: H04N19/44 ,  H04N19/70 ,  H04N19/30

Abstract: Systems, methods, and computer-readable storage media are provided for decoded picture buffer (DPB) operations and rewriting access unit delimiters (AUDs) after bitstream extractions. An example method can include storing one or more pictures associated with an access unit (AU) in a decoded picture buffer (DPB), the AU including a first plurality of pictures, the first plurality of pictures corresponding to a plurality of video coding layers; after each picture of a second plurality of pictures associated with the AU is removed from a coded picture buffer (CPB), removing at least one picture of the one or more pictures from the DPB; and storing, in the DPB, each picture of the second plurality of pictures removed from the CPB.

公开(公告)号：US20210235078A1

公开(公告)日：2021-07-29

申请号：US17153512

申请日：2021-01-20

Applicant: QUALCOMM Incorporated

Inventor： Nan HU ,  Vadim SEREGIN ,  Marta KARCZEWICZ

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

Abstract: Systems, methods, and media are provided for video coding, including loop filtering. One example includes obtaining the video data comprising one or more pictures and determining a sample of the one or more pictures to be filtered using a loop filter. A shift variable associated with the sample is determined, and a rounding value is selected based on the shift variable. A modified sample is generated, the modified sample being generated at least in part by modifying a value of the sample using one or more filter coefficients, one or more clipping values of the loop filter, the rounding value, and the shift variable. The modified sample is then output.

公开(公告)号：US20210076033A1

公开(公告)日：2021-03-11

申请号：US17006087

申请日：2020-08-28

Applicant: QUALCOMM Incorporated

Inventor： Nan HU ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/182 ,  H04N19/96 ,  H04N19/136 ,  H04N19/46

Abstract: Systems, methods, and media are provided for loop filtering across raster scan slices. One example includes obtaining the video data comprising one or more pictures and a first block of a picture having a pixel subject to filtering. A second block is determined to be located in the first slice in a particular relation to the second block. A third block that includes pixels for filtering the pixel is determined to be in a second slice at a diagonal corner of the first block, with filtering across slice boundaries disabled. First one or more pixels of the second block are identified as available for performing loop filtering of the pixel and second one or more pixels of the third block identified as unavailable for performing the loop filtering of the pixel of the first block. The first one or more pixels and the second one or more pixels are padded.

公开(公告)号：US20200374518A1

公开(公告)日：2020-11-26

申请号：US16878436

申请日：2020-05-19

Applicant: QUALCOMM Incorporated

Inventor： Nan HU ,  Vadim SEREGIN ,  Marta KARCZEWICZ

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/82

Abstract: Systems, methods, and computer-readable media are provided for simplification of clipping value calculations for adaptive loop filtering. An example method can include obtaining video data including one or more pictures; obtaining a block of a picture from the one or more pictures; determining clipping values for a filter, the clipping values corresponding to a luma component in the picture and/or a chroma component in the picture, wherein each clipping value is determined by left shifting a first integer by a second integer, the second integer including a result of a bit depth value for a sample from the picture minus an offset value associated with a clipping index value; and applying the filter to the block.

公开(公告)号：US20200099924A1

公开(公告)日：2020-03-26

申请号：US16576677

申请日：2019-09-19

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Akshay GADDE ,  Hilmi Enes EGILMEZ ,  Marta KARCZEWICZ ,  Amir SAID

IPC: H04N19/103 ,  H04N19/61 ,  H04N19/156 ,  H04N19/115 ,  H04N19/176

Abstract: Techniques are described for improving transform coding. For example, an encoded block of video data can be obtained, and a width and/or a height of the block can be determined. The width can be compared to a first threshold and/or the height can be compared to a second threshold. A horizontal transform and a vertical transform can be determined for the block based on comparing the width of the block to the first threshold and/or the height of the block to the second threshold. The horizontal transform and the vertical transform are determined without decoding a syntax element that indicates the horizontal transform and the vertical transform (e.g., the syntax element is not in an encoded video bitstream processed by a decoding device). In some cases, residual data is determined using the horizontal and vertical transforms, and a video block is determined using the residual data and a predictive block.

公开(公告)号：US20150023431A1

公开(公告)日：2015-01-22

申请号：US14332181

申请日：2014-07-15

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN

IPC: H04N19/30 ,  H04N19/70

CPC classification number: H04N19/30 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33 ,  H04N19/513 ,  H04N19/70

Abstract: An apparatus configured to code video information includes a memory and a processor in communication with the memory. The memory is configured to store video information associated with a reference layer and an enhancement layer, the reference layer associated with a reference layer (RL) codec and the enhancement layer associated an enhancement layer (EL) codec. The processor is configured to determine whether the RL codec associated with the reference layer is a particular type of codec, and in response to determining that the RL codec is a particular type of codec, process, in a video bitstream, an indication that motion information of the reference layer cannot be used to code the enhancement layer. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器通信的存储器和处理器。 存储器被配置为存储与参考层和增强层相关联的视频信息，参考层与参考层（RL）编解码器相关联，增强层与增强层（EL）编解码器相关联。 处理器被配置为确定与参考层相关联的RL编解码器是否是特定类型的编解码器，并且响应于确定RL编解码器是特定类型的编解码器，在视频比特流中处理指示运动信息 的参考层不能用于对增强层进行编码。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20150016502A1

公开(公告)日：2015-01-15

申请号：US14329804

申请日：2014-07-11

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth RAPAKA ,  Vadim SEREGIN ,  Jianle CHEN ,  Ye-Kui WANG ,  Marta KARCZEWICZ

IPC: H04N19/187 ,  H04N19/50

CPC classification number: H04N19/50 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33 ,  H04N19/70

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a current layer and an enhancement layer, the current layer having a current picture. The processor is configured to determine whether the current layer may be coded using information from the enhancement layer, determine whether the enhancement layer has an enhancement layer picture corresponding to the current picture, and in response to determining that the current layer may be coded using information from the enhancement layer and that the enhancement layer has an enhancement layer picture corresponding to the current picture, code the current picture based on the enhancement layer picture. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器单元通信的存储器单元和处理器。 存储器单元被配置为存储与当前层和增强层相关联的视频信息，当前层具有当前画面。 处理器被配置为确定是否可以使用来自增强层的信息对当前层进行编码，确定增强层是否具有与当前图像对应的增强层图像，以及响应于确定当前层可以使用信息进行编码 并且增强层具有与当前画面对应的增强层画面，基于增强层画面对当前画面进行编码。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20140161179A1

公开(公告)日：2014-06-12

申请号：US14049649

申请日：2013-10-09

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Ying CHEN ,  Jianle CHEN

IPC: H04N7/26 ,  H04N7/46

CPC classification number: H04N19/30 ,  H04N19/33 ,  H04N19/34 ,  H04N19/463 ,  H04N19/50 ,  H04N19/55 ,  H04N19/59

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with an enhancement layer having a first block and a base layer having a second block, the second block in the base layer corresponding to the first block in the enhancement layer. The processor is configured to predict, by inter layer prediction, the first block in the enhancement layer based on information derived from the second block in the base layer. At least a portion of the second block is located outside of a reference region of the base layer, the reference region being available for use for the inter layer prediction of the first block. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器单元通信的存储器单元和处理器。 存储器单元被配置为存储与具有第一块的增强层相关联的视频信息和具有第二块的基本层，所述基本层中的第二块对应于增强层中的第一块。 处理器被配置为基于从基层中的第二块导出的信息，通过层间预测来预测增强层中的第一块。 第二块的至少一部分位于基本层的参考区域的外部，该参考区域可用于第一块的层间预测。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20140140405A1

公开(公告)日：2014-05-22

申请号：US14078242

申请日：2013-11-12

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Jianle CHEN ,  Marta KARCZEWICZ ,  Liwei GUO

IPC: H04N7/26

CPC classification number: H04N19/109 ,  H04N19/176 ,  H04N19/20 ,  H04N19/30 ,  H04N19/51 ,  H04N19/577

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a base layer and an enhancement layer. The video information comprises at least one enhancement layer (EL) block and at least one co-located base layer (BL) block. The co-located BL block has motion information associated therewith. The processor is configured to, in response to determining that the size of the EL block is smaller than a threshold size, either (1) use less than all of the motion information associated with the co-located BL block to code the EL block, or (2) refrain from using any motion information associated with the co-located BL block to code the EL block. The processor may encode or decode the video information.

Abstract translation: 被配置为对视频信息进行编码的装置包括与存储器单元通信的存储器单元和处理器。 存储器单元被配置为存储与基本层和增强层相关联的视频信息。 视频信息包括至少一个增强层（EL）块和至少一个共同定位的基本层（BL）块。 共同配置的BL块具有与其相关的运动信息。 响应于确定EL块的尺寸小于阈值尺寸，处理器被配置为（1）使用少于与同位置BL块相关联的所有运动信息来编码EL块， 或者（2）避免使用与同位置BL块相关联的任何运动信息来编码EL块。 处理器可以对视频信息进行编码或解码。

公开(公告)号：US20140064359A1

公开(公告)日：2014-03-06

申请号：US14011406

申请日：2013-08-27

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth RAPAKA ,  Jewon KANG ,  Jianle CHEN ,  Marta KARCZEWICZ ,  Vadim SEREGIN

IPC: H04N7/26

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/187 ,  H04N19/30 ,  H04N19/70

Abstract: An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores video information associated with a reference layer and a corresponding enhancement layer. The processor receives a mode list associated with the enhancement layer, the mode list comprising three entities, each entity identifying a different mode for determining a value of a video unit located at a position within the enhancement layer. The processor changes the mode list when a mode associated with a co-located video unit in the reference layer is not stored as the first entity in the mode list. The co-located video unit is located at a position in the reference layer corresponding to the position of the video unit in the enhancement layer.

Abstract translation: 根据某些方面的用于编码视频信息的装置包括存储器单元和与存储器单元通信的处理器。 存储单元存储与参考层和对应的增强层相关联的视频信息。 处理器接收与增强层相关联的模式列表，模式列表包括三个实体，每个实体标识用于确定位于增强层内的位置的视频单元的值的不同模式。 当与参考层中的同位置视频单元相关联的模式未被存储为模式列表中的第一实体时，处理器改变模式列表。 共同定位的视频单元位于与增强层中的视频单元的位置相对应的参考层中的位置。