公开(公告)号：US10327002B2

公开(公告)日：2019-06-18

申请号：US14743253

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

公开(公告)号：US10327001B2

公开(公告)日：2019-06-18

申请号：US14743176

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52 ,  H04N19/176 ,  H04N19/174 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

公开(公告)号：US20190068981A1

公开(公告)日：2019-02-28

申请号：US15684711

申请日：2017-08-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/184 ,  H04N19/176 ,  H04N19/52 ,  H04N19/11 ,  H04N19/70 ,  H04N19/593 ,  H04N19/91

Abstract: An example device for accessing image data includes a memory configured to store image data, the memory comprising a first region and a second region, and one or more processing units implemented in circuitry and configured to code most significant bits (MSBs) of a plurality of residuals of samples of a block of an image, each of the residuals representing a respective difference value between a respective raw sample value and a respective predicted value for the respective raw sample value, access the coded MSBs in the first region of the memory, determine whether to represent the residuals using both the MSBs and least significant bits (LSBs) of the plurality of residuals of the samples, and in response to determining not to represent the residuals using the LSBs, prevent access of the LSBs in a second region of the memory.

公开(公告)号：US20180103252A1

公开(公告)日：2018-04-12

申请号：US15782686

申请日：2017-10-12

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Teh Hsieh ,  Vadim Seregin ,  Xin Zhao ,  Amir Said ,  Vijayaraghavan Thirumalai ,  Marta Karczewicz

IPC: H04N19/122 ,  H04N19/176 ,  H04N19/169 ,  H04N19/18

CPC classification number: H04N19/122 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/1883

Abstract: In general, the disclosure describes a video coding device (e.g., a video encoder or a video decoder) configured to perform various transformations on video data. The video coding device applies a primary transform to a block of the video data, the primary transform having a first size, and the sub-block being at least a portion of the block. The video coding device determines whether application of a secondary transform, having a second size, to a sub-block of the block is allowed. Application of the secondary transform is disallowed when the first size is equal to the second size. Based on the application of the secondary transform being allowed, the video coding device applies the secondary transform to the sub-block. Application of the primary transform and the secondary transform construct a residual block in a pixel domain.

公开(公告)号：US09706210B2

公开(公告)日：2017-07-11

申请号：US14536216

申请日：2014-11-07

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Sungwon Lee ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/122 ,  H04N19/139 ,  H04N19/105 ,  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 CU block and a corresponding block in a reference frame for the largest coding unit (LCU). The video coder may define conditions (e.g., background and/or homogeneous conditions) for the branching based at least in part on the first SAD value. The video coder may also determine the branching based on detecting the background or homogeneous condition, the branching including a first branch corresponding to both a first CU size of the CU block and a second CU size of a sub-block of the CU block. The video coder may then set the first branch to correspond to the first CU size, if the first CU size or the second CU size satisfies the background condition.

公开(公告)号：US09554152B2

公开(公告)日：2017-01-24

申请号：US13940474

申请日：2013-07-12

Applicant: Qualcomm Incorporated

Inventor： Cheng-Teh Hsieh ,  Feng Ge ,  Sumit Mohan

IPC: H04N19/122 ,  H04N19/124 ,  H04N19/593 ,  H04N19/61 ,  H04N19/436 ,  H04N19/137 ,  H04N19/577 ,  H04N19/625

CPC classification number: H04N19/593 ,  H04N19/122 ,  H04N19/124 ,  H04N19/137 ,  H04N19/436 ,  H04N19/577 ,  H04N19/61 ,  H04N19/625

Abstract: In an example, a method of transforming video data in video coding includes applying a first stage of a two-dimensional transform to a block of video data values to generate a block of first stage results, and applying a second stage of the two-dimensional transform to the block of first stage results without reordering the first stage results to generate a block of second stage results.

Abstract translation: 在一个示例中，在视频编码中变换视频数据的方法包括将二维变换的第一阶段应用于视频数据块的块以产生第一阶段结果的块，以及应用第二阶段的二维 转换到第一阶段结果的块，而不重新排序第一阶段结果以产生第二阶段结果的块。

公开(公告)号：US20160227224A1

公开(公告)日：2016-08-04

申请号：US15006563

申请日：2016-01-26

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Teh Hsieh ,  Vadim Seregin ,  Jianle Chen ,  Rajan Laxman Joshi ,  Krishnakanth Rapaka ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/625 ,  H04N19/44 ,  H04N19/176 ,  H04N21/2383 ,  H04N19/96 ,  H04N21/61 ,  H04N19/124 ,  H04N19/13 ,  H04N19/149 ,  H04N19/61 ,  H04N19/82 ,  H04N19/52 ,  H04N21/438

CPC classification number: H04N9/79 ,  H04N5/355 ,  H04N9/64 ,  H04N11/002 ,  H04N11/02 ,  H04N11/042 ,  H04N11/044 ,  H04N19/124 ,  H04N19/13 ,  H04N19/149 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/42 ,  H04N19/44 ,  H04N19/52 ,  H04N19/61 ,  H04N19/625 ,  H04N19/82 ,  H04N19/96 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/6131 ,  H04N21/6181

Abstract: A device for encoding or decoding video data may clip first residual data based on a bit depth of the first residual data. The device may generate second residual data at least in part by applying an inverse Adaptive Color Transform (TACT) to the first residual data. Furthermore, the device may reconstruct, based on the second residual data, a coding block of a coding unit (CU) of the video data.

Abstract translation: 用于对视频数据进行编码或解码的设备可以基于第一残差数据的比特深度来剪辑第一残差数据。 该装置可以至少部分地通过对第一残差数据应用反自适应颜色变换（TACT）来产生第二残差数据。 此外，设备可以基于第二残差数据重建视频数据的编码单元（CU）的编码块。

公开(公告)号：US20160134876A1

公开(公告)日：2016-05-12

申请号：US14536216

申请日：2014-11-07

Applicant: QUALCOMM Incorporated

Inventor： In Suk Chong ,  Sungwon Lee ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/122 ,  H04N19/139 ,  H04N19/105

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 CU block and a corresponding block in a reference frame for the largest coding unit (LCU). The video coder may define conditions (e.g., background and/or homogeneous conditions) for the branching based at least in part on the first SAD value. The video coder may also determine the branching based on detecting the background or homogeneous condition, the branching including a first branch corresponding to both a first CU size of the CU block and a second CU size of a sub-block of the CU block. The video coder may then set the first branch to correspond to the first CU size, if the first CU size or the second CU size satisfies the background condition.

Abstract translation: 提供了用于低复杂度视频编码的技术。 例如，视频编码器可以被配置为计算CU块和用于最大编码单元（LCU）的参考帧中的对应块之间的绝对差（SAD）值的第一和。 视频编码器可以至少部分地基于第一SAD值来定义用于分支的条件（例如，背景和/或均匀条件）。 视频编码器还可以基于检测背景或均匀条件来确定分支，该分支包括对应于CU块的第一CU大小和CU块的子块的第二CU大小的第一分支。 如果第一CU大小或第二CU大小满足背景条件，则视频编码器然后可以将第一分支设置为对应于第一CU大小。

公开(公告)号：US20160007042A1

公开(公告)日：2016-01-07

申请号：US14754577

申请日：2015-06-29

Applicant: QUALCOMM Incorporated

Inventor： Wei Pu ,  Rajan Laxman Joshi ,  Jianle Chen ,  Marta Karczewicz ,  Cheng-Teh Hsieh ,  Feng Zou ,  Joel Sole Rojals

IPC: H04N19/593 ,  H04N19/91 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

Abstract: A method for decoding video data provided in a bitstream, where the bitstream includes a coding unit (CU) coded in palette mode, includes: parsing a palette associated with the CU provided in the bitstream; parsing one or more run lengths provided in the bitstream that are associated with the CU; parsing one or more index values provided in the bitstream that associated with the CU; and parsing one or more escape pixel values provided in the bitstream that are associated with the CU. The escape pixel values may be parsed from consecutive positions in the bitstream, the consecutive positions being in the bitstream after all of the run lengths and the index values associated with the CU. The method may further include decoding the CU based on the parsed palette, parsed run lengths, parsed index values, and parsed escape values.

Abstract translation: 一种用于对比特流中提供的视频数据进行解码的方法，其中所述比特流包括以调色板模式编码的编码单元（CU），包括：解析与所述比特流中提供的CU相关联的调色板; 解析与所述CU相关联的位流中提供的一个或多个游程长度; 解析与所述CU相关联的所述比特流中提供的一个或多个索引值; 以及解析与所述CU相关联的位流中提供的一个或多个逃逸像素值。 可以从比特流中的连续位置解析逃逸像素值，连续的位置在所有游程长度和与CU相关联的索引值之后在比特流中。 该方法还可以包括基于解析的调色板，解析的运行长度，解析的索引值和解析的转义值来解码CU。

公开(公告)号：US12212736B2

公开(公告)日：2025-01-28

申请号：US17809167

申请日：2022-06-27

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Han Huang ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Zhi Zhang ,  Yao-Jen Chang ,  Yan Zhang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

Abstract: A device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine a deterministic bounding box from which to retrieve reference samples of reference pictures of video data for performing decoder-side motion vector derivation (DMVD) for a current block of the video data; derive a motion vector for the current block according to DMVD using the reference samples within the deterministic bounding box; form a prediction block using the motion vector; and decode the current block using the prediction block.