Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, an encoder signals a parameter for determining a value of a coding bit depth; the encoder further signals a first Sequence Parameter Set (SPS) flag, and the first SPS flag is a transform skip enabled flag. The encoder sets a second SPS flag based on a value of the first SPS flag and the value of the coding bit depth.

Abstract: A method for video encoding includes dividing a video frame into a plurality of blocks; determining a quantization parameter for a current block in the plurality of blocks; identifying an escape sample in the current block; and encoding information associated with the quantization parameter into a bitstream. When the quantization parameter is greater than a threshold value, the method further includes obtaining a value of a reconstructed sample based on a value of the escape sample using a predefined formula. When the quantization parameter is equal to the threshold value, the method further includes determining a value of a reconstructed sample to be a value of the escape sample.

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 decoding. In one method, a decoder receives a Sequence Parameter Set (SPS) coefficient enabled flag that indicates whether a slice header (SH) coefficient enabled flag is present in slice header syntax structure referring to the SPS. In a second method, the decoder may receive a Sequence Parameter Set (SPS) transform precision adaption enabled flag that indicates whether downshifts in a scaling process for transform coefficients and in a transformation process for scaled transform coefficients are adaptively assigned by examining coefficients values of dequantization and inverse transform.

Abstract: A video coding method is disclosed. The method includes determining whether a predictor sample of a reference picture for a current coding block is out-of-boundary (OOB). In response to determining that the predictor sample is OOB, a zero additional weighting is assigned to the predictor sample in combining two or more predictor samples generated by a motion compensation process to obtain a final predictor sample for the current coding block. In response to determining that the predictor sample is not OOB, a non-zero additional weighting is assigned to the predictor sample in combining the two or more predictor samples generated by the motion compensation process to obtain the final predictor sample for the current coding block.

Abstract: A method for video decoding is provided. The method includes obtaining a first affine candidate and a second affine candidate associated with a current block, calculating a first set of affine model parameters associated with one or more control point motion vectors (CPMVs) of the first affine candidate, calculating a second set of affine model parameters associated with one or more CPMVs of the second affine candidate, and performing a similarity check between the first affine candidate and the second affine candidate based on the first set of affine model parameters and the second set of affine model parameters.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding and encoding. In one decoding method, a decoder obtains at least one motion vector of a first motion vector or a second motion vector, where a coding unit is geometrically partitioned into a first part of a geometric partition and a second part of the geometric partition for prediction in a geometric partitioning mode, and the first motion vector is from the first part and the second motion vector is from the second part. Additionally, the decoder may determine a value of a stored motion vector type based on a blending width, a motion index, and a part index. Furthermore, the decoder may store a motion vector in a corresponding motion field based on the value of the stored motion vector type and the first or second motion vector.

Abstract: The present disclosure provides a method for decoding video data. The method comprises: obtaining a video block from a bitstream; obtaining neighboring luma and chroma sample values of the video block; performing at least one pre-operation to the neighboring luma sample values and to internal luma sample values in the video block, to obtain pre-operated neighboring and internal luma sample values, wherein performing the at least one pre-operation comprises calculating sample differences based on the neighboring and internal luma sample values; deriving a linear model by using the pre-operated neighboring luma sample values and the neighboring chroma sample values; predicting each of internal chroma sample values in the video block by applying the linear model to one or more corresponding pre-operated internal luma sample values for that internal chroma sample value; and obtaining decoded video block using the predicted internal chroma sample values.

Abstract: Methods and devices are provided for video coding. In the method, a decoder may receive a picture frame including one or more components, where the one or more components include a first component and a second component. The decoder determines a classifier for a respective sample of the second component according to a collocated sample of the first component; obtains an indicator that indicates one or more bandNum segments of the one or more components in response to determining that the classifier is a band classifier or a joint classifier encompassing the band classifier; determines, according to the indicator and from a mapping table, the one or more bandNum segments and determining a band offset according to the one or more bandNum segments; and modifies the respective sample of the second component according to a sample offset including the band offset.

Abstract: Methods for video decoding and encoding, and non-transitory computer-readable storage medium are provided. In one decoding method, the decoder obtains a neighboring block of a current coding block by scanning one or more scanning areas of the current coding block, wherein the current coding block is in an intra block copy (IBC) mode. Additionally, the decoder determines whether the neighboring block is within a valid reference area. Furthermore, in response to determining that the neighboring block is not within the valid reference area, the decoder determines whether to use the neighboring block as a valid reference block for the current coding block.

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder obtains a context compressed binarized value generated by compressing a binarized value using one or more contexts, where the binarized value is obtained by binarizing a blending index, and includes one or more bins. Furthermore, the decoder obtains the blending index based on the context compressed binarized value. Moreover, the decoder obtains a blending width for a current block based on the blending index and a mapping relationship between a plurality of blending indices and a set of blending widths, where the current block is partitioned into two parts along a partition line for prediction in a geometric partitioning mode.

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory computer-readable storage media thereof are provided. One method for video decoding includes: receiving, by a decoder, a first syntax element representing an adaptive loop filter (ALF) coefficient; receiving, by the decoder and in response to the ALF coefficient being non-zero, a second syntax element indicating a clipping range of ALF input samples; and filtering, by the decoder, a reconstructed video block corresponding to a current block, based on the first syntax element and the second syntax element.

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder obtains a restricted area that is not adjacent to a current coding unit (CU) according to a value associated with the restricted area. Additionally, the decoder obtains one or more motion vector (MV) candidates from a plurality of non-adjacent CUs to the current CU based on the restricted area. Furthermore, the decoder obtains one or more control point motion vectors (CPMVs) for the current CU based on the one or more MV candidates.

Abstract: A method for decoding video data. The method includes obtaining a video block from a bitstream; determining a region to derive a multiple linear regression (MLR) model; obtaining luma and chroma sample values in the region; deriving the MLR model using the luma and chroma sample values in the region; predicting each of chroma samples in the video block by applying the MLR model to corresponding luma samples for that chroma sample; and obtaining decoded video block using the predicted chroma samples.

Abstract: An automobile underbody die-cast structure is formed by megacasting, and includes a front floor and an insert. The front floor includes a hollow area. The insert is arranged in the hollow area of the front floor and is connected to the front floor. The insert can be separated from the front floor by cutting.

Abstract: Methods and devices are provided for reducing the decoding latency introduced by LMCS. In one method, during encoding of a coding unit (CU), a plurality of reconstructed luma samples is selected from a first pre-determined region neighboring to a second pre-determined region where the CU is located, an average of the plurality of reconstructed luma samples is calculated, and the average of the plurality of reconstructed luma samples is used directly, without any clipping, in deriving a chroma residual scaling factor, a bitstream comprising luma mapping with chroma scaling (LMCS) related information is formed.

Abstract: An encoding method for a video signal is provided. Partition constraint syntax elements are obtained at a sequence parameter set (SPS) level, including intra prediction-related syntax elements and inter prediction-related syntax elements. The partition constraint syntax elements are arranged such that the intra prediction-related syntax elements are defined before the inter prediction-related syntax elements. Partition constraint syntax elements for dual-tree chroma are grouped together under dual-tree conditions and defined before the inter prediction-related syntax elements. A bitstream including the SPS is generated and sent based on the arranged partition constraint syntax elements.

Abstract: A method for video decoding is provided. The method includes obtaining a current coding unit (CU) of a current picture, wherein the coding unit is partitioned into a plurality of regions; deriving respective motion models for the plurality of regions by using respective coding information; and determining motion information for the current CU based on the respective motion models.

Abstract: A method for video decoding is provided. The method includes determining a first reference picture and/or a second reference picture associated with a current picture comprising a current block; determining an adaptive optical model used in an optical flow based refinement based on the first reference picture and/or the second reference picture; determining an adaptive sliding window size for the current block used in the optical flow based refinement; and deriving a respective motion refinement of each subblock of the current block based on the adaptive optical model and the adaptive sliding window.