Abstract: An electronic apparatus performs a method of decoding video data. The method comprises, receiving, from bitstream, video data corresponding to a palette-mode coded block; determining a quantization parameter value from information included in a parameter set associated with the palette-mode coded block; identifying escape samples in the palette-mode coded block; in accordance with a determination that the quantization parameter value is greater than a threshold value: performing de-quantization on quantized escape samples according to a predefined formula to obtain reconstructed escape sample values; and in accordance with a determination that the quantization parameter value is less than or equal to the threshold value: setting the reconstructed escape samples to be the quantized escape sample values.

Abstract: An electronic apparatus performs a method of coding video data. The method comprises: receiving, from the bitstream, syntax elements associated with a coding unit, wherein the syntax elements include a first coded block flag (CBF) for residual samples of a first chroma component, a second CBF for residual samples of a second chroma component, and a third syntax element indicating whether adaptive color transform (ACT) is applied to the coding unit; determining whether to perform the chroma residual scaling to the residual samples of the chroma components according to the first CBF, the second CBF, and the third syntax element; in accordance with a determination to perform the chroma residual scaling to the residual samples of the first and second chroma components, scaling the residual samples of the at least one of the first and second chroma components based on a corresponding scaling parameter.

Abstract: A method of video coding, an apparatus, and a non-transitory computer-readable storage medium thereof are provided. The method includes obtaining one or more affine candidates from a plurality of non-adjacent neighbor blocks that are non-adjacent to a current block. The method may further include obtaining one or more control point motion vectors (CPMVs) for the current block based on the one or more affine candidates.

Abstract: A method for video coding is provided. A plurality of coding units (CUs) are obtained from a picture. During decoding of a CU coded in a combined inter and intra prediction (CIIP) mode and with luma mapping with chroma scaling (LMCS) enabled, a plurality of reconstructed samples of a luma component are obtained in a mapped domain. The reconstructed samples of the luma component are converted from the mapped domain into an original domain by applying inverse mapping associated with the LMCS to obtain converted samples of the luma component in the original domain. Chroma scaling factors for decoding chroma samples of the CU are derived by using corresponding reconstructed samples of the luma component without clipping.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder derives a reference picture for a current coding block; the decoder derives a predictor sample based on a motion vector associated with the reference picture using a motion compensation process from the reference picture; the decoder determines whether the predictor sample is located outside the reference picture by a certain margin; and the decoder determines the predictor sample is out-of-boundary (OOB) in response to determining the predictor sample is located outside the reference picture by a certain margin.

Abstract: Implementations of the disclosure provide a video decoding apparatus and method for transform coefficient sign prediction on a video decoder side. The method includes: receiving a bitstream including a sequence of sign signaling bits; determining a sign prediction area in a transform block of a video frame from a video for performing the sign prediction for the transform coefficients of the transform block; generating a plurality of candidate hypotheses for a set of candidate transform coefficients associated with the sign prediction area of the transform block; selecting a hypothesis from the plurality of candidate hypotheses as a set of predicted signs for the set of candidate transform coefficients based on a cost function; and estimating original signs for the set of candidate transform coefficients based on the set of predicted signs and the sequence of sign signaling bits.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder derives a first reference picture and a second reference picture for a current coding block; the decoder derives a first predictor sample based on a first motion vector associated with the first reference picture using a motion compensation process from the first reference picture; the decoder derives a second predictor sample based on a second motion vector associated with the second reference picture using the motion compensation process from the second reference picture; and the decoder obtains a final predictor sample in the current coding block based on at least one of the first predictor sample or the second predictor sample and an out-of-boundary (OOB) condition.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding and compression with high precision intra prediction technology. In one method, a decoder obtains a first control flag signaled at a specified level that comprises one of following levels: a Transform Block (TB) level, a Coding Block (CB) level, a slice level, a picture level, or a sequence level, where the first control flag indicates whether a Decoder-side High Precision Intra Mode Derivation (DHI) mode is enabled.

Abstract: An electronic apparatus performs a method of decoding video data. The method includes: receiving, from the bitstream, a plurality of syntax elements associated with a coding unit, the plurality of syntax elements indicating the coding tree type of the coding unit, and whether the local dual tree mode is enabled for the coding unit; and in accordance with the determination that the coding tree type of the coding unit is a single tree, and the local dual tree mode is enabled for the coding unit: disabling the palette mode for the coding unit when the coding unit has the size equal to or less than a predefined threshold. The disabling palette mode for the coding unit may include: disabling the palette mode for both the luma component and chroma component of the coding unit, or disabling the palette mode for only the chroma component of the coding unit.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video encoding. The method includes dividing a video block into multiple video subblocks, where at least one of the multiple video subblocks is associated with two motion vectors. The method may further include obtaining a first reference picture and a second reference picture associated with the two motion vectors; obtaining first prediction samples from the first reference picture and obtaining second prediction samples from the second reference picture; determining not to apply PROF for the video block based on a difference between control-point motion vectors; obtaining horizontal and vertical gradient values of the first prediction samples and second prediction samples for the PROF when the PROF is applied; obtaining motion refinements for samples in the video subblock according to the horizontal and vertical gradient values; and obtaining prediction samples of the video block based on the motion refinements.

Abstract: Methods and apparatus are provided for video decoding/encoding. In a method provided, a decoder may obtain an original sample value of a current block; determine a slope adjustment for a model parameter in a compensation model; and determine, based on the slope adjustment, an updated model parameter in the compensation model. The decoder may further determine based on the updated model parameter and the original sample value, a refined sample value or a second sample value of the current block.

Abstract: Methods for video decoding and encoding, apparatuses, and non-transitory computer-readable storage media are provided. In one method, a decoder may obtain a first block vector (BV) and a second BV based on a bi-predicted intra block copy (IBC) mode. Additionally, the decoder may generate a first prediction block based on the first BV and generating, by the decoder, a second prediction block based on the second BV. Furthermore, the decoder may obtain a final prediction block for a current block based on the first prediction block and the second prediction block.

Abstract: An electronic apparatus performs a method of decoding video data. The method includes: receiving, from the bitstream, a plurality of syntax elements associated with a coding unit, the plurality of syntax elements indicating the coding tree type of the coding unit, and whether the local dual tree mode is enabled for the coding unit; and in accordance with the determination that the coding tree type of the coding unit is a single tree, and the local dual tree mode is enabled for the coding unit: disabling the palette mode for the coding unit when the coding unit has the size equal to or less than a predefined threshold. The disabling palette mode for the coding unit may include: disabling the palette mode for both the luma component and chroma component of the coding unit, or disabling the palette mode for only the chroma component of the coding unit.

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder determines that an advanced motion vector prediction (AMVP)-Merge (AM) mode is enabled for a current picture or a slice of the current picture. Furthermore, the decoder obtains an AMVP motion vector (MV) of a current block in the current picture, for a first list of reference pictures LX where X is 0 or 1, as an LX MV. Moreover, the decoder obtains a list of valid merge MV candidates for a second list of reference pictures L(1?X), where the list of valid merge MV candidates comprises merge candidates that have L(1?X) MV. Further, the decoder selects an L(1?X) MV of the AM mode among the list of valid merge MV candidates.

Abstract: A method for Cross-Component Sample Adaptive Offset (CCSAO) process is provided. The method comprises: determining a first rate-distortion (RD) cost for a block using a first classifier, wherein the first classifier having a first category number in a first value range, and wherein the first RD cost is the least among RD costs associated with classifiers having a category number in the first value range; determining a second RD cost for the block using a second classifier, wherein the second classifier having a second category number in a second value range, and wherein the second RD cost is the least among RD costs associated with classifiers having a category number in the second value range; and applying the first classifier as a classifier for the CCSAO process in response to determining the first RD cost is less than the second RD cost.

Abstract: Provided is a use of mitofusin 2 (MFN2), an MFN2 variant capable of interacting with SERCA2, or an MFN2 expression promoter in maintaining and/or promoting tumor-killing capability and/or viability of a CD8 T cell. Also provided is a use of a CD8 T cell overexpressing MFN2 or a variant thereof for treatment of cancer.

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. The method for video decoding includes: obtaining, by a decoder, a plurality of first motion vectors of a plurality of sub-blocks of a current block, based on a subblock-based temporal motion vector prediction (SbTMVP) mode; deriving, by the decoder, a set of linear model parameters by inputting the plurality of first motion vectors and a plurality of center positions of the plurality of sub-blocks into a linear regression process; and obtaining, by the decoder, a plurality of predictions of the plurality of sub-blocks based on the set of linear model parameters.

Abstract: A method for video decoding, a method for video encoding, computing devices, and non-transitory computer readable storage mediums are provided. In the video decoding method, a decoder receives a control flag in a sequence parameter set (SPS), where the control flag indicates whether decoder side motion vector refinement (DMVR) is enabled for decoding video blocks in a current video sequence. The decoder receives a presence flag in the SPS when the control flag is true. The decoder receives a picture control flag in a picture header of each picture that refers to the SPS when the presence flag in the SPS is true, where the picture control flag indicates whether the DMVR is disabled for video blocks in the picture.

Abstract: Implementations of the disclosure provide a video processing method for motion information derivation. The video processing method may include determining, by a video decoder, that one or more motion related parameters for a video block in a video frame of a video are not signaled in a bitstream. The video processing method may further include determining, by the video decoder, the one or more motion related parameters for the video block by applying a coding matching technique.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding. In one method, a decoder determines a fusion scheme applied in decoder-side intra mode derivation (DIMD) mode and in template-based intra mode derivation (TIMD) mode, and the fusion scheme is applied as a weighted average of predictors in the DIMD mode and in the TIMD mode.