Inter prediction refinement based on bi-directional optical flow (BIO)

HC Chuang, J Chen, YW Chen, X Li… - US Patent …, 2019 - Google Patents
(57) ABSTRACT A video decoder can be configured to determine that a block of video data
is encoded using a bi-directional inter predic tion mode; determine that the block of video …

Method and system for decoder-side intra mode derivation for block-based video coding

X **u, Y He, Y Ye - US Patent 11,722,677, 2023 - Google Patents
US11722677B2 - Method and system for decoder-side intra mode derivation for block-based
video coding - Google Patents US11722677B2 - Method and system for decoder-side intra …

Control-point based intra direction representation for intra coding

X **u, Y He, Y Ye - US Patent 10,939,096, 2021 - Google Patents
Systems and methods are described for control-point based intra mode for coding a video
bitstream. In an exemplary embodiment, at least two control points in a picture are selected …

Memory-bandwidth-efficient design for bi-directional optical flow (BIO)

HC Chuang, J Chen, K Zhang, X Li… - US Patent …, 2021 - Google Patents
(57) ABSTRACT A device for decoding video data is configured to perform interpolation
filtering using an N-tap filter to generate an interpolated search space for a first block of …

Primary transform and secondary transform in video coding

CT Hsieh, V Seregin, X Zhao, A Said… - US Patent …, 2021 - Google Patents
(57) ABSTRACT A video coding device (eg, a video encoder or a video decoder) is
configured to perform various transformations on video data. The video coding device …

Joint separable and non-separable transforms for next-generation video coding

X Zhao, J Chen, M Karczewicz, A Said… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
Throughout the past few decades, the separable discrete cosine transform (DCT),
particularly the DCT type II, has been widely used in image and video compression. It is well …

Gradient based matching for motion search and derivation

X Li, YW Chen, J Chen, HC Chuang, WJ Chien… - US Patent …, 2020 - Google Patents
A method of decoding video data includes determining, by a video decoder implemented in
circuitry, a bi-predicted MV predictor for a block of video data. The bi-predicted MV predictor …

Constrained block-level optimization and signaling for video coding tools

X Zhao, V Seregin, RL Joshi, A Said, X Li… - US Patent …, 2020 - Google Patents
An example device for decoding encoded video data includes storage media and
processing circuitry. The storage media are configured a portion of the encoded video data …

Bi-directional optical flow for video coding

X Li, J Chen, WJ Chien, M Karczewicz - US Patent 10,375,413, 2019 - Google Patents
An example device for decoding video data includes a processor configured to decode first
and second reference pictures, wherein the first reference picture and the second reference …

Modified adaptive loop filter temporal prediction for temporal scalability support

L Zhang, WJ Chien, M Karczewicz… - US Patent 10,506,230, 2019 - Google Patents
(57) ABSTRACT A video coder may reconstruct a current picture of video data. A current
region of the current picture is associated with a temporal index indicating a temporal layer …