公开(公告)号：WO2023044253A1

公开(公告)日：2023-03-23

申请号：PCT/US2022/076032

申请日：2022-09-07

Applicant: QUALCOMM INCORPORATED

Inventor： SEREGIN, Vadim ,  HUANG, Han ,  KARCZEWICZ, Marta

IPC: H04N19/52 ,  H04N19/557 ,  H04N19/56

Abstract: An example method of encoding or decoding video data includes determining a motion vector for a block of video data using a decoder side motion vector derivation process that includes performing an iterative search process, wherein performing the iterative search process includes: determining a minimum cost through a previous search iteration; updating an overall minimum cost through a current search iteration; and terminating the iterative search process early based on a comparison of the minimum cost through the previous search iteration and the overall minimum cost through the current search iteration; and encoding or decoding the block of video data using the motion vector.

公开(公告)号：WO2023044247A1

公开(公告)日：2023-03-23

申请号：PCT/US2022/075830

申请日：2022-09-01

Applicant: QUALCOMM INCORPORATED

Inventor： HUANG, Han ,  ZHANG, Yan ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/52 ,  H04N19/577

Abstract: A method of decoding video data may comprise determining merge candidates for a block of video data and determining if a merge candidate of the merge candidates includes an additional inter prediction signal. If a merge candidate includes an additional inter prediction signal, the method may include disabling at least one decoder side motion vector derivation technique for use on a base prediction signal of the block of video data.

公开(公告)号：WO2022266592A1

公开(公告)日：2022-12-22

申请号：PCT/US2022/072865

申请日：2022-06-10

Applicant: QUALCOMM INCORPORATED

Inventor： CHANG, Yao-Jen ,  HUANG, Han ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/52 ,  H04N19/543

Abstract: A video coder may be configured to determine a partitioning for a block of video data using geometric partitioning mode; construct two uni-prediction motion vector candidate lists for the block of video data, and code the block of video data using uni-prediction based on at least one of the two uni-prediction motion vector candidate lists to generate a decoded block of video data.

公开(公告)号：WO2022256825A1

公开(公告)日：2022-12-08

申请号：PCT/US2022/072723

申请日：2022-06-02

Applicant: QUALCOMM INCORPORATED

Inventor： CAO, Keming ,  HU, Nan ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/11 ,  H04N19/146 ,  H04N19/176 ,  H04N19/593

Abstract: A method of encoding or decoding video data comprises: for each respective intra prediction mode of a plurality of intra prediction modes in a most-probable mode (MPM) list: generating, based on reference samples for a template region and using the respective intra prediction mode, prediction samples for the template region; and determining a cost for the respective intra prediction mode; determining a first intra prediction mode and a second intra prediction mode in the MPM list having lowest costs; determining a preliminary prediction block for the first intra prediction mode and a preliminary prediction block for the second intra prediction mode; generating a prediction block based on a fusion of the preliminary prediction blocks weighted according to a weight for the first intra prediction mode and a weight for the second intra prediction mode.

公开(公告)号：WO2022165154A1

公开(公告)日：2022-08-04

申请号：PCT/US2022/014280

申请日：2022-01-28

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Chun-Chi ,  HUANG, Han ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/567 ,  H04N19/523

Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors configured to: decode data representing an initial motion vector for a current block of the video data, the initial motion vector having integer-motion vector difference (MVD) precision; determine a search range around a reference area identified by the initial motion vector in a reference picture; perform a template matching search process in the search range to identify a best matching region; determine error values for neighboring pixels to the best matching region; use the error values for the neighboring pixels to perform a model-based fractional-pixel motion vector refinement to derive motion vector difference values; apply at least one of the motion vector difference values to the initial motion vector to determine a refined motion vector for the current block; and decode the current block using the refined motion vector.

公开(公告)号：WO2022072289A1

公开(公告)日：2022-04-07

申请号：PCT/US2021/052255

申请日：2021-09-27

Applicant: QUALCOMM INCORPORATED

Inventor： EGILMEZ, Hilmi, Enes ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

IPC: H04N19/12 ,  H04N19/157 ,  H04N19/18

Abstract: A video decoder can be configured to determine a number of allowed non-zero coefficients for a block of video data based on a size of the block; obtain a set of dequantized coefficients for the block, the set of dequantized coefficients comprising a first subset of dequantized coefficients that includes non-zero dequantized coefficients and a second subset of dequantized coefficients that includes all zero coefficients, wherein a number of coefficients in the first subset of dequantized coefficients equals the number of allowed non-zero coefficients for the block of video data; apply an inverse low-frequency non-separable transform the first subset of dequantized coefficients to determine a first intermediate subset of coefficients; and apply an inverse separable transform to the first intermediate subset of coefficients and at least a portion of the second subset of coefficients to determine a block of reconstructed residual values.

公开(公告)号：WO2021202993A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/025571

申请日：2021-04-02

Applicant: QUALCOMM INCORPORATED

Inventor： COBAN, Muhammed Zeyd ,  SEREGIN, Vadim ,  HE, Yong ,  CHANG, Yao-Jen

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/169 ,  H04N19/46 ,  H04N19/543 ,  H04N19/105 ,  H04N19/188

Abstract: An example method includes decoding, from a picture header syntax structure of a coded video bitstream, a syntax element indicating whether or not a picture associated with the picture header syntax structure may include multiple different types of Network Abstraction Layer (NAL) units; responsive to the syntax element indicating that the picture may include multiple different types of NAL units, decoding a merged subpicture track that includes the picture where each picture in the merged subpicture track refers to a common picture parameter set (PPS); and reconstructing, based on the common PPS, samples of the picture.

公开(公告)号：WO2021202905A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/025425

申请日：2021-04-01

Applicant: QUALCOMM INCORPORATED

Inventor： HU, Nan ,  SEREGIN, Vadim ,  COBAN, Muhammed Zeyd ,  KARCZEWICZ, Marta

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/159 ,  H04N19/176 ,  H04N19/103 ,  H04N19/50 ,  H04N19/82

Abstract: A method of coding video data includes determining that chroma related syntax elements of the video data are present for luma mapping with chroma scaling (LMCS) for a coding unit (CU) of the video data, coding a syntax element of the video data when the chroma related syntax elements are present for LMCS for the CU, the syntax element is indicative of a value for determining a scaling parameter for chroma scaling in LMCS, and coding a chroma block of the CU based on the scaling parameter for chroma scaling.

公开(公告)号：WO2021174098A1

公开(公告)日：2021-09-02

申请号：PCT/US2021/020050

申请日：2021-02-26

Applicant: QUALCOMM INCORPORATED

Inventor： HE, Yong ,  SEREGIN, Vadim ,  COBAN, Muhammed Zeyd ,  HU, Nan ,  KARCZEWICZ, Marta

IPC: H04N19/187 ,  H04N19/30 ,  H04N19/70

Abstract: In one example, a device for decoding video data includes one or more processors implemented in circuitry and configured to: determine that a value for a syntax element representing a number of profile-tier-level (PTL) data structures in a video parameter set (VPS) of a bitstream is equal to a total number of output layer sets (OLSs) specified for the VPS; in response to determining that the value for the syntax element representing the number of profile-tier-level data structures in the VPS is equal to the total number of OLSs specified for the VPS, infer values for OLS PTL index values, without explicitly decoding values for the OLS PTL index values; and decode video data of one or more OLSs using corresponding PTL data structures of the PTL data structures in the VPS according to the inferred values for the OLS PTL index values.

公开(公告)号：WO2021133909A1

公开(公告)日：2021-07-01

申请号：PCT/US2020/066838

申请日：2020-12-23

Applicant: QUALCOMM INCORPORATED

Inventor： COBAN, Muhammed Zeyd ,  SEREGIN, Vadim ,  RAMASUBRAMONIAN, Adarsh Krishnan ,  KARCZEWICZ, Marta

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/188

Abstract: A method of processing video data comprises obtaining a bitstream and locating intra random access pictures (IRAP) or Gradual Decoder Refresh (GDR) pictures among the encoded pictures in the bitstream. Locating the IRAP or GDR pictures may comprise obtaining, from a picture header Network Abstraction Layer (NAL) unit in the bitstream, a syntax element that indicates that a picture associated with the picture header NAL unit must be either an Intra Random Access Picture (IRAP) or a Gradual Decoder Refresh (GDR) picture. The picture header NAL unit contains syntax elements that apply to all slices of the picture associated with the picture header NAL unit.