公开(公告)号：US20190306506A1

公开(公告)日：2019-10-03

申请号：US16373271

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen CHEN ,  Hsiao-Chiang CHUANG ,  Wei-Jung CHIEN ,  Marta KARCZEWICZ

IPC: H04N19/119 ,  H04N19/172 ,  H04N19/159 ,  H04N19/70 ,  H04N19/96

Abstract: A method of decoding video data including receiving a bitstream that includes a sequence of bits that forms a representation of a coded picture of the video data, partitioning the coded picture of the video data into a plurality of blocks using three or more different partition structures, and reconstructing the plurality of blocks of the coded picture of the video data. Partitioning the coded picture of the video data may include partitioning the coded picture of the video data into the plurality of blocks using a plurality partition structures. In some embodiments, partitioning is constrained to, for example, reduce memory bandwidth in implementations of video decoders.

公开(公告)号：US20190222848A1

公开(公告)日：2019-07-18

申请号：US16249371

申请日：2019-01-16

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen CHEN ,  Wei-Jung CHIEN ,  Yu-Chen SUN ,  Li ZHANG ,  Hsiao-Chiang CHUANG ,  Marta KARCZEWICZ

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513 ,  H04N19/577

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/521 ,  H04N19/577

Abstract: Improved systems and methods related to decoder-side motion vector derivation (DMVD), for example, in applying one or more constraints to motion information, such as a MV derived by DMVD, and/or a MV difference between an initial MV and an MV derived by DMVD. These techniques may be applied to any of the existing video codecs, such as HEVC (High Efficiency Video Coding), and/or may be an efficient coding tool in any future video coding standards. In one example, the block size used for DMVD can be restricted. In another example, FRUC bilateral matching can be simplified by not searching outside reference blocks indicated by the original motion vector.

公开(公告)号：US20190124350A1

公开(公告)日：2019-04-25

申请号：US16159458

申请日：2018-10-12

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan THIRUMALAI ,  Xiang LI ,  Nan HU ,  Hsiao-Chiang CHUANG ,  Marta KARCZEWICZ

IPC: H04N19/513 ,  H04N19/85 ,  H04N19/52

Abstract: A device for video decoding may include a memory configured to store video data and a processor configured receive a bitstream including encoded video data. The processor may be configured to select a number of template matching (TM) candidates for a temporal layer or slice during the video decoding. The number of TM candidates selected are fixed prior to the video decoding, or adaptively calculated during the video decoding. The processor may be configured to generate a prediction block and residual block, based on a template matching candidate, to reconstruct the video data.

公开(公告)号：US20190116376A1

公开(公告)日：2019-04-18

申请号：US16158033

申请日：2018-10-11

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen CHEN ,  Yu-Chen SUN ,  Wei-Jung CHIEN ,  Hsiao-Chiang CHUANG ,  Marta KARCZEWICZ

IPC: H04N19/513 ,  H04N19/176

Abstract: Motion compensated prediction using affine motion models can be used to improve coding efficiency. In a practical encoder/decoder, a line buffer is used to store associated data for neighboring blocks. Embodiments of affine model based motion compensated prediction include methods and systems of determining motion vectors for control points that are aware of line buffer storage limitations.

公开(公告)号：US20180270500A1

公开(公告)日：2018-09-20

申请号：US15918789

申请日：2018-03-12

Applicant: QUALCOMM Incorporated

Inventor： Xiang LI ,  Yi-Wen CHEN ,  Jianle CHEN ,  Hsiao-Chiang CHUANG ,  Wei-Jung CHIEN ,  Yu-Chen SUN ,  Marta KARCZEWICZ

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/44

Abstract: Techniques and systems are provided for deriving one or more sets of affine motion parameters at a decoder. For example, the decoder can obtain video data from an encoded video bitstream. The video data includes at least a current picture and a reference picture. The decoder can determine a set of affine motion parameters for a current block of the current picture. The set of affine motion parameters can be used for performing motion compensation prediction for the current block. The set of affine motion parameters can be determined using a current affine template of the current block and a reference affine template of the reference picture. In some cases, an encoder can determine a set of affine motion parameters for a current block using a current affine template of the current block and a reference affine template of the reference picture, and can generate an encoded video bitstream that includes a syntax item indicating template matching based affine motion derivation mode is to be used by a decoder for the current block. The encoded video bitstream may not include any affine motion parameters for determining the set of affine motion parameters.