公开(公告)号：US10382755B2

公开(公告)日：2019-08-13

申请号：US15876897

申请日：2018-01-22

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Geert Van der Auwera ,  Chengjie Tu ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N11/02 ,  H04N19/117 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82

Abstract: A device for encoding video data may be configured to encode video data according to a set of sample adaptive offset (SAO) types; perform a plurality of coding passes to test a subset of the SAO types for a first block of video data, wherein the subset is smaller than the set; select from the subset of SAO types an SAO type for the first block of video data; and generate for inclusion in an encoded bitstream, information for identifying the selected SAO type for the first block.

公开(公告)号：US20180332281A1

公开(公告)日：2018-11-15

申请号：US15977590

申请日：2018-05-11

Applicant: QUALCOMM Incorporated

Inventor： Yang Yu ,  In Suk Chong ,  Xianglin Wang ,  Prasanjit Panda ,  Mayank Tiwari ,  Marta Karczewicz ,  Shashidhar Jangili

IPC: H04N19/107 ,  H04N19/124 ,  H04N19/177 ,  H04N19/91 ,  H04N19/176

CPC classification number: H04N19/107 ,  H04N19/124 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

Abstract: This disclosure describes techniques for achieve high coding efficiency by periodically encoding anchor frames with a lower Quantization Parameter (QP) to provide better prediction for the following frames. Techniques include adaptively deciding which frames are encoded with lower QP by use of the collected encoding statistics via an encoding scheme with or without rate control.

公开(公告)号：US09912944B2

公开(公告)日：2018-03-06

申请号：US13863266

申请日：2013-04-15

Applicant: QUALCOMM Incorporated

Inventor： Liwei Guo ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N7/50 ,  H04N19/61 ,  H04N19/159 ,  H04N19/119 ,  H04N19/122 ,  H04N19/96

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/122 ,  H04N19/159 ,  H04N19/619

Abstract: In an example, a method of decoding video data includes determining a prediction partitioning structure for predicting pixel values associated with a block of video data. The method also includes determining a transform partitioning structure for applying one or more transforms to the predicted pixel values. Determining the transform split structure includes splitting a parent transform unit, upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more square transforms, determining one or more square transforms such that each of the one or more square transforms correspond to exactly one prediction partition, and upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more non-square transforms, determining whether to split the one or more non-square transforms based at least in part on the one or more non-square transforms being non-square.

公开(公告)号：US09883187B2

公开(公告)日：2018-01-30

申请号：US14737271

申请日：2015-06-11

Applicant: QUALCOMM Incorporated

Inventor： Chengjie Tu ,  Wei-Jung Chien ,  Xianglin Wang ,  Jaehong Chon ,  In Suk Chong ,  Marta Karczewicz ,  Woo-Shik Kim ,  Xin Zhao

IPC: H04N19/103 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/119 ,  H04N19/567 ,  H04N19/174 ,  H04N19/109 ,  H04N19/157

CPC classification number: H04N19/14 ,  H04N19/109 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/176 ,  H04N19/567

Abstract: A video encoding device comprises a memory configured to store video data and at least one processor configured to: select one of a full rate-distortion (RD) checking scheme or a fast RD checking scheme, determine an RD cost associated with encoding a block of the video data based on the selected full RD checking scheme or fast RD checking scheme, determine a partitioning scheme for the block based on the determined RD cost, and encode the block using the determined partitioning scheme based on the determined RD cost.

公开(公告)号：US09877024B2

公开(公告)日：2018-01-23

申请号：US14856192

申请日：2015-09-16

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Geert Van der Auwera ,  Chengjie Tu ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N11/02 ,  H04N19/117 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82

Abstract: A device for encoding video data may be configured to encode video data according to a set of sample adaptive offset (SAO) types; perform a plurality of coding passes to test a subset of the SAO types for a first block of video data, wherein the subset is smaller than the set; select from the subset of SAO types an SAO type for the first block of video data; and generate for inclusion in an encoded bitstream, information for identifying the selected SAO type for the first block.

公开(公告)号：US20170272765A1

公开(公告)日：2017-09-21

申请号：US15612912

申请日：2017-06-02

Applicant: QUALCOMM Incorporated

Inventor： Xianglin Wang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Ying Chen ,  Peisong Chen

IPC: H04N19/182 ,  H04N19/61 ,  H04N19/593 ,  H04N19/105

CPC classification number: H04N19/182 ,  H04N19/105 ,  H04N19/593 ,  H04N19/61

Abstract: A video coder performs a padding operation that processes a set of border pixels according to an order. The order starts at a bottom-left border pixel and proceeds through the border pixels sequentially to a top-right border pixel. When the padding operation processes an unavailable border pixel, the padding operation predicts a value of the unavailable border pixel based on a value of a border pixel previously processed by the padding operation. The video coder may generate an intra-predicted video block based on the border pixels.

公开(公告)号：US09699472B2

公开(公告)日：2017-07-04

申请号：US14695941

申请日：2015-04-24

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/109 ,  H04N19/159 ,  H04N19/577

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

Abstract: A computing device determines whether a prediction unit (PU) in a B slice is restricted to uni-directional inter prediction. In addition, the computing device generates a merge candidate list for the PU and determines a selected merge candidate in the merge candidate list. If the PU is restricted to uni-directional inter prediction, the computing device generates a predictive video block for the PU based on no more than one reference block associated with motion information specified by the selected merge candidate. If the PU is not restricted to uni-directional inter prediction, the computing device generates the predictive video block for the PU based on one or more reference blocks associated with the motion information specified by the selected merge candidate.

公开(公告)号：US09654782B2

公开(公告)日：2017-05-16

申请号：US14536342

申请日：2014-11-07

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Sungwon Lee ,  Cheng-Teh Hsieh ,  Xianglin Wang

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/122 ,  H04N19/139 ,  H04N19/50 ,  H04N19/103 ,  H04N19/137

CPC classification number: H04N19/176 ,  H04N19/103 ,  H04N19/105 ,  H04N19/122 ,  H04N19/137 ,  H04N19/139

Abstract: Provided are techniques for low complexity video coding. For example, a video coder may be configured to calculate a first sum of absolute difference (SAD) value between a coding unit (CU) block and a first corresponding block in a reference frame, and define branching conditions for branching of CU sizes based on the first SAD value, the branching conditions including a background condition and/or a homogeneous condition. The video coder may be configured to detect the background condition if the first SAD value of the CU block is less than a first threshold background value, and detect the homogeneous condition if a second SAD value of a sub-block of the CU block is between upper and lower homogeneous threshold values based on the first SAD value. The branching of the CU sizes may be based on detecting the background or homogeneous conditions.

公开(公告)号：US09596463B2

公开(公告)日：2017-03-14

申请号：US13773151

申请日：2013-02-21

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Xianglin Wang ,  Marta Karczewicz

IPC: H04N19/463 ,  H04N19/40 ,  H04N19/82 ,  H04N19/91

CPC classification number: H04N19/40 ,  H04N19/463 ,  H04N19/82 ,  H04N19/91

Abstract: Techniques for coding video data include coding sample adaptive offset (SAO) offset values as part of performing a video coding process. In particular, the techniques include determining the SAO offset values according to a SAO process. The techniques further include storing a codebook defining a plurality of codes for coding different variations of SAO offset values. The techniques also include coding the SAO offset values in accordance with the codebook so as to specify the SAO offset values as one of the plurality of codes defined by the codebook.

Abstract translation: 用于编码视频数据的技术包括编码样本自适应偏移（SAO）偏移值作为执行视频编码处理的一部分。 特别地，这些技术包括根据SAO过程确定SAO偏移值。 所述技术还包括存储定义用于编码SAO偏移值的不同变化的多个代码的码本。 这些技术还包括根据码本编码SAO偏移值，以便将SAO偏移值指定为由码本定义的多个代码之一。

公开(公告)号：US09521410B2

公开(公告)日：2016-12-13

申请号：US13870149

申请日：2013-04-25

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Xianglin Wang

IPC: H04N19/124 ,  H04N19/61 ,  H04N19/70 ,  H04N19/126

CPC classification number: H04N19/61 ,  H04N19/124 ,  H04N19/126 ,  H04N19/70

Abstract: A method of coding delta quantization parameter values is described. In one example a video decoder may receive a delta quantization parameter (dQP) value for a current quantization block of video data, wherein the dQP value is received whether or not there are non-zero transform coefficients in the current quantization block. In another example, a video decoder may receive the dQP value for the current quantization block of video data only in the case that the QP Predictor for the current quantization block has a value of zero, and infer the dQP value to be zero in the case that the QP Predictor for the current quantization block has a non-zero value, and there are no non-zero transform coefficients in the current quantization block.

Abstract translation: 描述了编码δ量化参数值的方法。 在一个示例中，视频解码器可以接收视频数据的当前量化块的增量量化参数（dQP）值，其中接收当前量化块中是否存在非零变换系数的dQP值。 在另一示例中，视频解码器可以仅在当前量化块的QP Predictor具有零值的情况下接收当前视频数据量化块的dQP值，并且在该情况下将dQP值推定为零 当前量化块的QP Predictor具有非零值，并且在当前量化块中不存在非零变换系数。