公开(公告)号：US20150215621A1

公开(公告)日：2015-07-30

申请号：US14332192

申请日：2014-07-15

Applicant: QUALCOMM Incorporated

Inventor： Meng Liu ,  Hsiao-Chiang Chuang ,  Hariharan Ganesh Lalgudi ,  Srikanth Alaparthi ,  Cheng-Teh Hsieh ,  Harikrishna Madadi Reddy ,  Kai Wang

IPC: H04N19/124 ,  H04N19/184 ,  H04N19/147

CPC classification number: H04N19/124 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176

Abstract: In one example, a method of encoding video data includes allocating, based on a complexity of a reference frame and a quantity of bits allocated to a current frame, a quantity of bits to a current largest coding unit (LCU) included in the current frame. In this example, the method also includes determining, based on the quantity of bits allocated to the current LCU, a quantization parameter (QP) for the current LCU, and encoding the current LCU with the determined QP.

Abstract translation: 在一个示例中，视频数据的编码方法包括基于参考帧的复杂度和分配给当前帧的比特数来分配当前帧中包括的当前最大编码单元（LCU）的比特量 。 在该示例中，该方法还包括基于分配给当前LCU的比特量来确定当前LCU的量化参数（QP），以及用所确定的QP对当前LCU进行编码。

公开(公告)号：US20150139331A1

公开(公告)日：2015-05-21

申请号：US14083184

申请日：2013-11-18

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/60 ,  H04N19/122 ,  H04N19/12

CPC classification number: H04N19/12 ,  H04N19/103 ,  H04N19/107 ,  H04N19/122 ,  H04N19/124 ,  H04N19/157 ,  H04N19/70

Abstract: In an example, a method of transforming video data comprises determining, based on variable operational code, a plurality of control parameters for transforming the video data in a transform domain, wherein the operational code maps each of the plurality of control parameters to respective operational code fields, and performing transformation of the video data based on the determined control parameters.

Abstract translation: 在一个示例中，一种变换视频数据的方法包括基于可变操作码确定用于变换变换域中的视频数据的多个控制参数，其中操作代码将多个控制参数中的每一个映射到相应的操作代码 并且基于所确定的控制参数来执行视频数据的变换。

公开(公告)号：US20250047884A1

公开(公告)日：2025-02-06

申请号：US18365854

申请日：2023-08-04

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Teh Hsieh ,  Han Huang ,  Chun-Chi Chen ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoder may be configured to receive a block of video data that was encoded using a coding mode that includes a search process in one or more reference frames. The video decoder may prefetch reference samples in a fixed search region of at least one reference frame of the one or more reference frames, and decode the block of video data using the coding mode, including performing the search process for the coding mode using the prefetched reference samples.

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：US20230007238A1

公开(公告)日：2023-01-05

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.

公开(公告)号：US11425405B2

公开(公告)日：2022-08-23

申请号：US17096740

申请日：2020-11-12

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/82 ,  H04N19/44 ,  H04N19/186 ,  H04N19/117

Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured to: decode a coding tree unit (CTU) of video data, the CTU including a luminance (luma) block and a chrominance (chroma) block, to produce a decoded luma block and a decoded chroma block; determine that a chroma sample of the decoded chroma block is on a first side of an adaptive loop filter (ALF) virtual boundary and that a co-located luma sample of the decoded luma block is on a second side of the ALF virtual boundary, the co-located luma sample being co-located with the chroma sample, the first side being different than the second side; and in response to determining that the chroma sample is on the first side and the luma sample is on the second side, disable cross-component adaptive loop filtering (CC-ALF) for the chroma sample.

公开(公告)号：US11290743B2

公开(公告)日：2022-03-29

申请号：US16705027

申请日：2019-12-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/573 ,  H04N19/513 ,  H04N19/159 ,  H04N19/176 ,  H04N19/132 ,  H04N19/105 ,  H04N19/186 ,  H04N19/46

Abstract: Systems and techniques for performing illumination compensation in processing video data include deriving one or more illumination compensation parameters for a block of a picture based on one or more tools which may be used for inter-prediction of the block. Illumination compensation can be selectively applied for the block based on whether bi-directional prediction is to be applied for the inter-prediction of the block. In some cases if it is determined that bi-directional prediction is to be applied for inter-prediction of the block, illumination compensation may be avoided for the block.

公开(公告)号：US11197025B2

公开(公告)日：2021-12-07

申请号：US16905182

申请日：2020-06-18

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Cheng-Teh Hsieh ,  Thibaud Laurent Biatek ,  Luong Pham Van ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/44

Abstract: A video coder determines a plurality of available Matrix Intra Prediction (MIP) parameter sets (MPS's) for a picture of video data. The plurality of available MPS's is a union of (i) a subset of all default MPS's and (ii) a set of additional MPS's that are signaled in the bitstream. Each of the default MPS's is associated with a predefined MIP mode in a codec. Each of the set of additional MPS's is associated with a new MIP mode in a set of new MIP modes. The video decoder uses a MIP mode associated with an MPS in the plurality of available MPS's to generate a prediction block for a current block of the picture.

公开(公告)号：US20210044828A1

公开(公告)日：2021-02-11

申请号：US16947489

申请日：2020-08-04

Applicant: QUALCOMM Incorporated

Inventor： Luong Pham Van ,  Han Huang ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: A video decoder can be configured to determine that a block of the video data is formatted in accordance with a 4:4:4 video coding format; determine that the block of the video data is encoded in an intra prediction mode; determine that a smallest chroma intra prediction unit (SCIPU) is disabled for the block in response to determining that the block has the 4:4:4 video coding format; decode the block of the video data based on the determination that the SCIPU is disabled; and output decoded video data comprising a decoded version of the block.

公开(公告)号：US10477232B2

公开(公告)日：2019-11-12

申请号：US14663161

申请日：2015-03-19

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/593 ,  H04N19/105 ,  H04N19/52 ,  H04N19/139 ,  H04N19/182 ,  H04N19/56 ,  H04N19/563 ,  H04N19/57

Abstract: A video coder may determine a search region for coding a current block of video data using Intra Block Copy (Intra BC). In some examples, the video coder determines a central point for the search region, and determines the search region for the current block based on the central point and a defined size for the search region. The video coder stores reconstructed blocks of the video data from a current picture that includes the current block in a memory based on the determined search region. The video coder codes information from which to identify one of the reconstructed blocks within the search region, and codes the current block based on the identified one of the reconstructed blocks according to Intra BC.