公开(公告)号：US09191670B2

公开(公告)日：2015-11-17

申请号：US13710212

申请日：2012-12-10

Applicant: Qualcomm Incorporated

Inventor： Marta Karczewicz ,  Jianle Chen ,  Wei-Jung Chien ,  Rajan Laxman Joshi

IPC: H04N19/64 ,  H04N19/91 ,  H04N19/60 ,  H04N19/70 ,  H04N19/13 ,  H04N19/93

CPC classification number: H04N19/00775 ,  H04N19/13 ,  H04N19/60 ,  H04N19/70

Abstract: This disclosure proposes various techniques for limiting the number of bins that are coded using an adaptive context model with context adaptive binary arithmetic coding (CABAC). In particular, this disclosure proposes to limit the number of bins that use CABAC for coding level information of transform coefficients in a video coding process.

Abstract translation: 本公开提出了用于限制使用具有上下文自适应二进制算术编码（CABAC）的自适应上下文模型编码的分组数的各种技术。 特别地，本发明提出限制在视频编码处理中使用CABAC对于变换系数的编码电平信息的信道数。

公开(公告)号：US09154792B2

公开(公告)日：2015-10-06

申请号：US13669032

申请日：2012-11-05

Applicant: Qualcomm Incorporated

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

IPC: H04N7/26 ,  H04N19/88 ,  H03M7/40 ,  H04N19/70 ,  H04N19/13 ,  H04N19/463 ,  H04N19/18

CPC classification number: H04N19/88 ,  H03M7/4018 ,  H03M7/4037 ,  H04N19/13 ,  H04N19/18 ,  H04N19/463 ,  H04N19/70

Abstract: A video encoder is configured to determine a first and second binary string for a value indicating the position of the last significant coefficient, within a video block of size T. A video decoder is configured to determine a value indicating the position of a last significant coefficient within a video block of size T based on a first and second binary string. In one example, the first binary string is based on a truncated unary coding scheme defined by a maximum bit length defined by 2 log2(T)−1 and the second binary string is based on a fixed length coding scheme defined by a maximum bit length defined by log2(T)−2.

Abstract translation: 视频编码器被配置为在大小为T的视频块内确定用于指示最后有效系数的位置的值的第一和第二二进制串。视频解码器被配置为确定指示最后有效系数的位置的值 在基于第一和第二二进制串的大小为T的视频块内。 在一个示例中，第一二进制串基于由2log2（T）-1定义的最大位长定义的截断的一元编码方案，第二二进制串基于由最大位长度定义的固定长度编码方案 由log2（T）-2定义。

公开(公告)号：US09154787B2

公开(公告)日：2015-10-06

申请号：US13744128

申请日：2013-01-17

Applicant: Qualcomm Incorporated

Inventor： Sanjeev Kumar ,  Hsiao-Chiang Chuang ,  Shu Xiao ,  Kai Wang ,  Xianglin Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04N19/50 ,  H04N19/436 ,  H04N19/11 ,  H04N19/156 ,  H04N19/174

CPC classification number: H04N19/50 ,  H04N19/11 ,  H04N19/156 ,  H04N19/174 ,  H04N19/436

Abstract: The techniques of this disclosure are generally related to parallel coding of video units that reside along rows or columns of blocks in largest coding units. For example, the techniques include removing intra-prediction dependencies between two video units in different rows or columns to allow for parallel coding of rows or columns of the video units.

Abstract translation: 本公开的技术通常涉及以最大编码单元沿着行或列的行驻留的视频单元的并行编码。 例如，这些技术包括去除不同行或列中的两个视频单元之间的帧内预测依赖性，以允许视频单元的行或列的并行编码。

公开(公告)号：US20150071359A1

公开(公告)日：2015-03-12

申请号：US14021589

申请日：2013-09-09

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Marta Karczewicz ,  Joel Sole Rojals ,  Wei-Jung Chien ,  Rajan Laxman Joshi

IPC: H04N19/60 ,  H04N19/91

CPC classification number: H04N19/91 ,  H04N19/129 ,  H04N19/13 ,  H04N19/18 ,  H04N19/60

Abstract: In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.

Abstract translation: 在一些示例中，视频编码器采用两级技术来编码信息，该信息根据与该数据块相关联的扫描顺序来识别作为块的最后有效系数（LSC）的一个系数的变换系数块内的位置 变换系数块。 例如，视频编码器可以对在块内标识包括LSC的子块之一的位置的子块位置进行编码，并对识别子块内的LSC的位置的系数位置进行编码， 包括LSC。

公开(公告)号：US20130188698A1

公开(公告)日：2013-07-25

申请号：US13743846

申请日：2013-01-17

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Jianle Chen ,  Joel Sole Rojals ,  Liwei Guo ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/176 ,  H04N19/102 ,  H04N19/103 ,  H04N19/129 ,  H04N19/13 ,  H04N19/134 ,  H04N19/18 ,  H04N19/42 ,  H04N19/61 ,  H04N19/70

Abstract: In one example, a device includes a video coder configured to code a first set of syntax elements for the coefficients of a residual block of video data, and code, using at least a portion of the first set of syntax elements as context data, a second set of syntax elements for the coefficients, wherein the first set of syntax elements each correspond to a first type of syntax element for the coefficients, and wherein the second set of syntax elements each correspond to a second, different type of syntax element for the coefficients. For example, the first set of syntax elements may comprise values indicating whether the coefficients are significant (that is, have non-zero level values), and the second set of syntax elements may comprise values indicating whether level values for the coefficients have absolute values greater than one.

Abstract translation: 在一个示例中，设备包括视频编码器，其被配置为使用第一组语法元素的至少一部分作为上下文数据来编码视频数据的残余块的系数的第一组语法元素和代码， 用于所述系数的第二组语法元素，其中所述第一语法元素集合每个对应于所述系数的第一类型的语法元素，并且其中所述第二语法元素集合每个对应于用于所述系数的第二不同类型的语法元素 系数。 例如，第一组语法元素可以包括指示系数是否是重要的值（即，具有非零电平值）的值，并且第二组语法元素可以包括指示系数的电平值是否具有绝对值的值 大于一。

公开(公告)号：US12149707B2

公开(公告)日：2024-11-19

申请号：US17817128

申请日：2022-08-03

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Luong Pham Van ,  Wei-Jung Chien ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96

Abstract: An example method includes determining, for each respective coding block of a plurality of coding blocks of a current coding tree unit (CTU) of video data in a current picture of video data, a respective search area of a plurality of respective search areas, wherein at least one of the plurality of search areas includes samples of the current picture located outside of the current CTU, and wherein at least one of the plurality of search areas does not include samples of the current picture located outside of the current CTU; selecting, for each respective coding block and from within the respective search area for the respective coding block, a respective predictor block of a plurality of predictor blocks; and reconstructing samples of each respective coding block based on samples included in a corresponding predictor block in the plurality of predictor blocks.

公开(公告)号：US12137217B2

公开(公告)日：2024-11-05

申请号：US18331762

申请日：2023-06-08

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Adarsh Krishnan Ramasubramonian ,  Muhammed Zeyd Coban ,  Jianle Chen ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/114 ,  H04N19/107 ,  H04N19/159 ,  H04N19/187 ,  H04N19/31 ,  H04N19/70

Abstract: A device for encoding video data includes a memory configured to store video data, and a video encoder implemented in circuitry and configured to encode a future picture of the video data having a first display order position, the future picture being included in an intra period (IP) of the video data, the IP comprising a plurality of groups of pictures (GOPs), and after encoding the future picture, encode a picture of an ordinal first GOP of the plurality of GOPs using the future picture as a reference picture, each picture of the ordinal first GOP having display order positions earlier than the first display order position. Encoding the future picture in this manner may result in encoding performance improvements with minimal increases in encoding and decoding complexity.

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：US11743508B2

公开(公告)日：2023-08-29

申请号：US17373525

申请日：2021-07-12

Applicant: QUALCOMM Incorporated

Inventor： Hsiao-Chiang Chuang ,  Xiang Li ,  Jianle Chen ,  Feng Zou ,  Wei-Jung Chien ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/463 ,  H04N19/134 ,  H04N19/176 ,  H04N19/593

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/134 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593

Abstract: An example device includes a memory to store the video data, and processing circuitry in communication with the memory. The processing circuitry is configured to compare a value of a dimension of a current block of the stored video data to a value of a corresponding dimension of a neighboring block of the current block to obtain a relative dimension value. The processing circuitry is further configured to determine, based on the relative dimension value, that the current block is to be partitioned according to a prediction tree (PT) portion of a multi-type tree-based partitioning scheme. The PT portion comprises partitioning according to one of a binary tree structure or a center-side triple tree structure. The processing circuitry is further configured to partition, based on the determination, the current block according to the PT portion, to form a plurality of sub-blocks.

公开(公告)号：US11716490B2

公开(公告)日：2023-08-01

申请号：US17167723

申请日：2021-02-04

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/186 ,  G06N5/04

CPC classification number: H04N19/96 ,  G06N5/04 ,  H04N19/186

Abstract: A video coder may be configured to determine a partitioning for a picture of video data using dual tree partitioning. The video coder may receive a picture of video data, determine a partitioning for the picture of video data using dual tree partitioning for luma blocks and chroma blocks based on a minimum quadtree size, wherein a maximum value for the minimum quadtree size is equal to a threshold used for inferring a quadtree split, and code the partitioned picture.