公开(公告)号：US20130114675A1

公开(公告)日：2013-05-09

申请号：US13665467

申请日：2012-10-31

Applicant: Qualcomm Incorporated

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz ,  Joel Sole Rojals

IPC: H04N7/26 ,  H03M7/00

CPC classification number: H03M7/4018 ,  H04N19/13

Abstract: In one example, an apparatus for context adaptive entropy coding may include a coder configured to determine one or more initialization parameters for a context adaptive entropy coding process based on one or more initialization parameter index values. The coder may be further configured to determine one or more initial context states for initializing one or more contexts of the context adaptive entropy coding process based on the initialization parameters. The coder may be still further configured to initialize the contexts based on the initial context states. In some examples, the initialization parameters may be included in one or more tables, wherein, to determine the initialization parameters, the coder may be configured to map the initialization parameter index values to the initialization parameters in the tables. Alternatively, the coder may be configured to calculate the initialization parameters using the initialization parameter index values and one or more formulas.

Abstract translation: 在一个示例中，用于上下文自适应熵编码的装置可以包括编码器，其被配置为基于一个或多个初始化参数索引值来确定用于上下文自适应熵编码处理的一个或多个初始化参数。 编码器还可以被配置为基于初始化参数确定用于初始化上下文自适应熵编码处理的一个或多个上下文的一个或多个初始上下文状态。 编码器还可以进一步配置为基于初始上下文状态来初始化上下文。 在一些示例中，初始化参数可以被包括在一个或多个表中，其中为了确定初始化参数，编码器可以被配置为将初始化参数索引值映射到表中的初始化参数。 或者，编码器可以被配置为使用初始化参数索引值和一个或多个公式来计算初始化参数。

公开(公告)号：US20130114674A1

公开(公告)日：2013-05-09

申请号：US13646102

申请日：2012-10-05

Applicant: Qualcomm Incorporated

Inventor： In Suk Chong ,  Sanjeev Kumar ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/61 ,  H04N19/82

Abstract: A video coder configured to perform sample adaptive offset filtering can determine a center value for a set of pixels based on values of pixels in the set, divide bands of pixels values into groups based on the center value, and determine offset values for the bands based on the groups.

Abstract translation: 被配置为执行采样自适应偏移滤波的视频编码器可以基于集合中的像素的值来确定一组像素的中心值，基于中心值将像素值的频带划分成组，并且基于频带确定偏移值 在组上。

公开(公告)号：US20130114673A1

公开(公告)日：2013-05-09

申请号：US13645330

申请日：2012-10-04

Applicant: Qualcomm Incorporated

Inventor： Wei-Jung Chien ,  Joel Sole Rojals ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/60 ,  H03M7/4018 ,  H04N19/103 ,  H04N19/13 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/50 ,  H04N19/91

Abstract: A reduction in the number of binarizations and/or contexts used in context adaptive binary arithmetic coding (CABAC) for video coding is proposed. In particular, this disclosure proposes techniques that may lower the number contexts used in CABAC by up to 56.

公开(公告)号：US20130094572A1

公开(公告)日：2013-04-18

申请号：US13645345

申请日：2012-10-04

Applicant: Qualcomm Incorporated

Inventor： Geert Van der Auwera ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/00096 ,  H04N19/126 ,  H04N19/70 ,  H04N19/86

Abstract: In general, techniques are described for performing transform dependent de-blocking filtering, which may be implemented by a video encoding device. The video encoding device may apply a transform to a video data block to generate a block of transform coefficients, apply a quantization parameter to quantize the transform coefficients and reconstruct the block of video data from the quantized transform coefficients. The video encoding device may further determine at least one offset used in controlling de-blocking filtering based on the size of the applied transform, and perform de-blocking filtering on the reconstructed block of video data based on the determined offset. Additionally, the video encoder may specify a flag in a picture parameter set (PPS) that indicates whether the offset is specified in one or both of the PPS and a header of an independently decodable unit.

Abstract translation: 通常，描述用于执行变换相关的去块滤波的技术，其可以由视频编码设备来实现。 视频编码装置可以向视频数据块应用变换以产生变换系数块，应用量化参数来量化变换系数并从量化变换系数重构视频数据块。 视频编码装置还可以基于所应用的变换的大小进一步确定用于控制解块滤波的至少一个偏移，并且基于所确定的偏移对重建的视频数据块执行解块滤波。 此外，视频编码器可以指定图像参数集（PPS）中的标志，其指示是否在PPS中的一个或两个中指定了偏移量，以及独立可解码单元的报头。

公开(公告)号：US20130089154A1

公开(公告)日：2013-04-11

申请号：US13648174

申请日：2012-10-09

Applicant: Qualcomm Incorporated

Inventor： Ying Chen ,  Ye-Kui Wang ,  Marta Karczewicz

IPC: H04N7/12

CPC classification number: H04N19/573 ,  H04N19/33 ,  H04N19/423 ,  H04N19/46 ,  H04N19/58 ,  H04N19/70

Abstract: Techniques are described related to receiving first and second sub-sequences of video, wherein the first sub-sequence includes one or more frames each having a first resolution, and the second sub-sequence includes one or more frames each having a second resolution, receiving a first sequence parameter set and a second sequence parameter set for the coded video sequence, wherein the first sequence parameter set indicates the first resolution of the one or more frames of the first sub-sequence, and the second sequence parameter set indicates the second resolution of the one or more frames of the second sub-sequence, and wherein the first sequence parameter set is different than the second sequence parameter set, and using the first sequence parameter set and the second sequence parameter set to decode the coded video sequence.

Abstract translation: 描述了与接收视频的第一和第二子序列有关的技术，其中第一子序列包括每个具有第一分辨率的一个或多个帧，并且第二子序列包括每个具有第二分辨率的一个或多个帧，接收 第一序列参数集和用于编码视频序列的第二序列参数集，其中第一序列参数集指示第一子序列的一个或多个帧的第一分辨率，并且第二序列参数集指示第二分辨率 的第一子序列的一个或多个帧，并且其中所述第一序列参数集不同于所述第二序列参数集，并且使用所述第一序列参数集和所述第二序列参数集来解码所述编码视频序列。

公开(公告)号：US12301856B2

公开(公告)日：2025-05-13

申请号：US17934318

申请日：2022-09-22

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/18 ,  H04N19/46

Abstract: A device for decoding video data can determine transform coefficients for a first block of a slice; derive a shift parameter for a second block of the slice based on the transform coefficients for the first block; receive one or more flags; determine a transform coefficient for the second block based on the one or more flags and based on the shift parameter; and output a decoded version of the second block based on the determined transform coefficient.

公开(公告)号：US12293554B2

公开(公告)日：2025-05-06

申请号：US18155480

申请日：2023-01-17

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N19/172 ,  G06T9/00 ,  G06T9/40 ,  H04N19/105 ,  H04N19/159 ,  H04N19/44 ,  H04N19/50 ,  G06T17/00 ,  G06V20/56 ,  H04N19/96

Abstract: A method comprises: for each of a plurality of dimensions: identifying a reference position for the dimension, the reference position for the dimension being a position in a reference frame for the respective dimension, and the reference frame for the respective dimension and a reference frame for at least one other dimension in the plurality of dimensions being different reference frames in a plurality of reference frames; identifying an inter predictor for the respective dimension, wherein a predictor has a coordinate value in the respective dimension corresponding to a coordinate value in the respective dimension of the inter predictor for the respective dimension; and encoding or decoding the current point based on the predictor.

公开(公告)号：US12283074B2

公开(公告)日：2025-04-22

申请号：US18627002

申请日：2024-04-04

Applicant: QUALCOMM Incorporated

Inventor： Geert Van der Auwera ,  Bappaditya Ray ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: G01S17/89 ,  G06T9/00 ,  G06T17/20

Abstract: A device for encoding point cloud data, the device comprising: a memory to store the point cloud data; and one or more processors coupled to the memory and implemented in circuitry, the one or more processors configured to: determine a horizontal plane position of a node, wherein the horizontal plane position indicates a position of a single plane that is perpendicular to a first axis of a coordinate system, wherein the first axis is a horizontal axis; determine, from a plurality of contexts consisting of 8 contexts, a context for the horizontal plane position of the node; and perform arithmetic encoding on a syntax element indicating the horizontal plane position using the determined context.

公开(公告)号：US20250119592A1

公开(公告)日：2025-04-10

申请号：US18888423

申请日：2024-09-18

Applicant: QUALCOMM Incorporated

Inventor： Thomas Alexander Ryder ,  Dmytro Rusanovskyy ,  Samuel James Eadie ,  Yun Li ,  Marta Karczewicz

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: Methods and devices for decoding video data are described. An example method includes in-loop filtering a current block of the video data using a neural network-based in-loop filter to generate an in-loop filtered current block, wherein the neural network-based in-loop filter is trained using an architecture comprising a U-Net architecture comprising one or more residual blocks and one or more transform blocks; and outputting the in-loop filtered current block.

公开(公告)号：US20250119586A1

公开(公告)日：2025-04-10

申请号：US18891068

申请日：2024-09-20

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Pavel Nikitin ,  Muhammed Zeyd Coban ,  Vadim Seregin

IPC: H04N19/70 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61

Abstract: A video coder may be configured to code a plurality of syntax elements that indicate an absolute value of a transform coefficients in a block, wherein the plurality of syntax elements include a significance flag and four or more greater_than_N flags. The video coder may further determine first respective contexts for each syntax element in a first set of the plurality of syntax elements from respective context tables for each syntax element in the first set of the plurality of syntax elements, and determine second respective contexts for each syntax element in a second set of the plurality of syntax elements from a shared context table.