Abstract: Methods and systems implement interpolation filters for motion prediction, and more specifically interpolation filters for template matching and decoder-side motion vector refinement (“DMVR”). A VVC and later standard encoder and a VVC and later standard decoder can configure one or more processors of a computing system to signal that at least one of a first filter derived by discrete cosine transform-based interpolation filter, a second filter derived by a cubic-based interpolation filter, and a third filter derived by a cubic-based interpolation filter are applied in a template matching-based mode, applied in DMVR search, or applied in both.

Abstract: Methods and systems implement application of chained motion vector prediction (“CMVP”). A VVC and later standard encoder and a VVC and later standard decoder, and/or an AVS3 and later-standard encoder and an AVS3 and later-standard decoder, can configure one or more processors of a computing system to apply CMVP in conjunction with Advanced Motion Vector Prediction (“AMVP”) mode while constructing spatially neighboring MVP candidates; apply CMVP in conjunction with Affine merge mode when inheriting Affine candidates; and apply CMVP in conjunction with subblock-based temporal motion vector prediction (“SbTMVP”) to obtain new motion shifts.

Abstract: The present disclosure provides a computer-implemented method for encoding or decoding video. The method includes encoding or decoding, in a plurality of picture parameter sets (PPS) associated with pictures of a coded layer video sequence (CLVS), corresponding first PPS flags indicating whether pictures are allowed to be partitioned into a plurality of tiles or slices. In a first PPS, a corresponding first PPS flag with a first value indicates a first picture of the CLVS is unpartitioned, and in a second PPS, another corresponding first PPS flag with a second value being different from the first value indicates that a second picture of the CLVS is allowed to be partitioned.

Abstract: The present disclosure provides a method of encoding a video sequence. The method includes receiving a video sequence; encoding the video sequence using an extrapolation filter-based intra prediction (EIP) fusion mode. The encoding the video sequence using the EIP fusion mode includes obtaining a first predictor by an extrapolation filter-based intra prediction (EIP) mode; obtaining a second predictor by an intra prediction mode; generating a fused predictor by fusing the first predictor and the second predictor; and predicting one or more pictures using the fused predictor.

Abstract: A VVC and later standard encoder and a VVC and later standard decoder are provided, configuring one or more processors of a computing system to perform motion vector refinement for geometric partitioning for motion prediction, and more specifically application of first-pass and second-pass Decoder-side Motion Vector Refinement (“DMVR”) in GPM motion prediction. The VVC and later standard encoder and decoder implement performing motion prediction upon two partitions of a geometric partitioning mode (GPM)-coded coding block, based on respective motion information of each partition, and applying weighted blending to respective motion predictions of each partition of the GPM-coded coding block based on a blending matrix, wherein the blending matrix depends on a split mode.

Abstract: A method and apparatus for video processing include: determining to skip a transform process for a prediction residual based on a maximum transform size of a prediction block; and signaling the maximum transform size in a sequence parameter set (SPS).

Abstract: An AVS3 and later-standard encoder and an AVS3 and later-standard decoder are provided, configuring one or more processors of a computing system to perform motion vector refinement in motion prediction by inter prediction in skip mode or direct mode. The encoder and the decoder are configured to implement preliminary searching before reordering motion candidates of a motion candidate list; prioritized candidate reordering and weighted candidate reordering; an Inter TM candidate list including one or more SBTMVP candidates and ETMVP candidates; TM-based refinement based on combined reference templates; conditional motion vector derivation for TMVP candidates; and converting a bi-predicted block to a uni-predicted block.

Abstract: An AVS3 and later-standard encoder and an AVS3 and later-standard decoder are provided, configuring one or more processors of a computing system to perform decoder-side motion vector refinement and affine motion compensation upon a same coding block. The encoder and the decoder are configured to implement one or both of refining a base motion vector of the affine model and refining non-translational parameters of the affine model by searching to minimize bilateral matching (“BM”) cost.

Abstract: A VVC-standard encoder and a VVC-standard decoder are provided, configuring one or more processors of a computing system to apply additional transform cores for inter coded blocks and apply a decoder side intra mode derivation (“DIMD”) process to inter prediction samples or residual samples to derive an intra prediction angular mode.

Abstract: A video decoding method includes: selecting a first intra prediction mode and a second intra prediction mode from a most probable mode (MPM) list; determining a first predictor based on the first intra prediction mode; determining a second predictor based on the second intra prediction mode; blending the first predictor and the second predictor to obtain a blended predictor for intra prediction; and decoding one or more pictures using the blended predictor.

Abstract: A method of decoding a bitstream to output one or more pictures for a video stream includes: decoding a bitstream to construct a merge candidate list including one or more merge candidates; determining whether a first candidate from the merge candidate list is a uni-motion candidate; in response to the first candidate being the uni-motion candidate, determining a bi-motion candidate based on the first candidate and one or more candidate motion vectors; and adding the bi-motion candidate to the merge candidate list.

Abstract: A method of decoding a video bitstream includes: determining a control point motion vector predictor (CPMVP) for an affine coded target block; refining the CPMVP based on a template matching (TM) cost to get a refined CPMVP; deriving the control point motion vector (CPMV) based on the refined CPMVP and a control point motion vector difference (CPMVD); and decoding the affine coded target block based on the CPMV.

Abstract: A method of decoding a bitstream includes: receiving a bitstream; and decoding, using coded information of the bitstream, one or more pictures, by: obtaining a first prediction signal based on a first block vector associated with a target subblock on a boundary of a target block of the one or more pictures; obtaining a second prediction signal based on prediction information from a neighboring subblock of the target subblock; and performing a motion compensation, based on the first prediction signal and the second prediction signal, to predict the target subblock.

Abstract: The present disclosure provides a method of encoding a video sequence. The method includes: receiving a video sequence; encoding the video sequence by determining that an implicit geometric partitioning mode (GPM) is applied to a coding block, a coding block being split into two geometric partitions; and performing an intra and inter prediction on the coding block.

Abstract: The present disclosure provides a method of encoding a video sequence. The method includes receiving a video sequence; encoding the video sequence by deriving one or more intra modes for intra prediction; performing template matching (TM) tests on a template region using different filters for the one or more intra modes; and selecting one or more intra filters based on a TM cost.

Abstract: A video encoding method includes: receiving a video sequence including a first key frame and one or more inter frames following the first key frame; generating a reconstructed key frame corresponding to the first key frame; transforming the reconstructed key frame and the one or more inter frames to visual tokens with different granularities; and encoding one or more token bitstreams including coded information for one or more of the visual tokens selected based on a data transmission bandwidth.

Abstract: A video processing method includes: determining whether an inter predictor correction is enabled for a coding block; and when the inter predictor correction is enabled for the coding block, performing the inter predictor correction by: obtaining a plurality of predicted samples from a top boundary and a left boundary of a predicted block corresponding to the coding block; obtaining a plurality of reconstructed samples from top neighboring reconstructed samples and left neighboring reconstructed samples of the coding block; and deriving a corrected predicted block based on the plurality of the predicted samples, the plurality of the reconstructed samples and the predicted block.

Abstract: The present disclosure provides a computer-implemented method for encoding video. The method includes coding one or more first flags in a sequence parameter set (SPS) of a bitstream, and coding at least one second flag in the SPS if one or more coding modes are enabled for a video sequence associated with the SPS. The one or more first flags indicate whether the one or more coding modes are enabled for the video sequence. The at least one second flag indicates whether a multi-level control is activated for the one or more coding modes.

Abstract: A method of encoding a video sequence into a bitstream is provided. The method includes: receiving a video sequence; and encoding one or more pictures of the video sequence; wherein the encoding includes: signaling a first flag in a slice header to indicate whether an active reference index number is present in a slice header; in response to the first flag indicating that the active reference index number is present, determining a number of entries of reference picture list 0, and signaling an active reference index number of reference picture list 0 in the slice header for P and B slices; and determining a number of entries of reference picture list 1, and signaling an active reference index number of reference picture list 1 in the slice header for B slice.

Abstract: A method and apparatus for video processing include: determining to skip a transform process for a prediction residual based on a maximum transform size of a prediction block; and signaling the maximum transform size in a sequence parameter set (SPS).