Abstract: Methods for video decoding and encoding, apparatuses and non-transitory computer-readable storage media thereof are provided. In one method for video decoding, a decoder may obtain a motion compensated chroma sample and a plurality of motion compensated luma samples for a current inter coding block. Furthermore, the decoder may obtain an adaptive cross-component filter and obtain a filtered motion compensated chroma sample based on the adaptive cross-component filter, the motion compensated chroma sample, and the plurality of motion compensated luma samples.

Abstract: An electronic apparatus performs a method of video coding. The method comprises: obtaining a video picture that includes a first component and a second component; determining a plurality of offsets associated with the second component; utilizing a sample value of the first component to obtain a class index associated with the second component; selecting an offset from the plurality of offsets for the second component according to the class index; and obtaining a sample value of the second component based on the selected offset, wherein the sample value of the first component is derived from one or more of collocated or neighboring samples of the first component relative to a sample of the second component, and wherein the sample value of the first component is derived differently for different chroma formats.

Abstract: Disclosed in the present disclosure are novel ultra-high-strength stainless steel and a manufacturing method. The novel ultra-high-strength stainless steel is composed of the following components in percentage by mass: C: 0.06-0.4%, Cr: 4-16%, Co: 8-17%, Ni: 2-15%, Mo: 1-7%, V: 0.1-0.8%, W: 0.2-3%, Nb: 0.01-0.3%, B: 0.1-0.3%, Si<0.1%, Mn<0.1%, Al<0.01%, Ti<0.015%, S<0.005%, P<0.008%, Cu<0.2%, La<0.2%, and the balance Fe and other inevitable impurities. The manufacturing process includes material melting, a high temperature diffusion process, cogging and forming of steel ingots, and material heat treatment. The novel ultra-high-strength stainless steel manufactured by using the method provided by the present disclosure has the tensile strength not lower than 2100 MPa, elongation not lower than 8%, reduction of area not lower than 40%, fracture toughness greater than 60 MPa ?{square root over (m)}, and a stress corrosion threshold greater than 40 MPa ?{square root over (m)}.

Abstract: An electronic apparatus performs a method of encoding video data. The method comprises: generating the video data corresponding to a coding unit, wherein the coding unit is coded by intra-prediction mode or inter-prediction mode; generating a first syntax element, wherein the first syntax element indicates whether the coding unit has been coded using adaptive color-space transform (ACT); transmitting the first syntax element to a decoding side, such that the decoding side, when determining from the first syntax element that the coding unit has been coded using the ACT, performs operations comprising: performing a clipping operation that confines a dynamic range of the residuals of the coding unit within a predefined range; and applying an inverse ACT to the residuals of the coding unit after the clipping operation.

Abstract: A method for video decoding is provided. The method includes obtaining, from a bitstream, a coding unit in a current picture, the coding unit including a luma block and a chroma block; obtaining a reconstructed luma sample in the luma block; determining one or more cross-component prediction models based upon a block size, the block size being a size of the luma block or a size of a reconstructed neighbouring block located on a top of or a left of the luma block; and applying at least one of the one or more cross-component prediction models to at least the reconstructed luma sample to predict a chroma sample in the chroma block.

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: A data processing method includes: acquiring a data sorting request for a data sequence to be sorted, and invoking C data bitonic sorting components in response to the data sorting request, C being a positive integer greater than 1; initiating B data bitonic sorting tasks according to the data sequence and the C data bitonic sorting components, B being a positive integer greater than 1, the B data bitonic sorting tasks being respectively associated with different data subsequences of B data subsequences, and the B data subsequences being generated based on the to-be-sorted data sequence; operating the C data bitonic sorting components in parallel according to the B data bitonic sorting tasks to obtain B data sorting subresults; and combining the B data sorting subresults based on the C data bitonic sorting components to obtain a data sorting result for the data sequence.

Abstract: This application is directed to decoding video data including a plurality of luma components of a plurality of pixels in a video frame. The plurality of pixels belong to a coding block, and include a boundary pixel inside the coding block wherein the boundary pixel is immediately adjacent to a boundary of the coding block. One or more neighboring pixels of the boundary pixel are outside of the coding block and determined as being not available. A respective luma component corresponding to the boundary pixel is assigned to a luma component corresponding to each of the one or more neighboring pixels. A boundary luma component is determined based, at least, on the luma components of the one or more neighboring pixels and the boundary pixel according to a predefined luma interpolation scheme. A boundary chroma component is converted from the boundary luma component according to a linear mapping model.

Abstract: An electronic apparatus performs a method of decoding video data. The method comprises: receiving, from bitstream, video data corresponding to a transform-skip mode coded block; decoding, from the video data, a first codeword, a second codeword and a first group of codewords for a pixel within the transform-skip mode coded block; deriving an initial level value from the first group of codewords; converting the first codeword into a remainder of the pixel in accordance with a predefined mapping relationship that is generated using a constant Rice parameter; converting the second codeword into a sign value of the remainder; and deriving a quantified residual of the pixel from the remainder, the sign value and the initial level value.

Abstract: This application is directed to processing video data that includes a plurality of luma samples and a plurality of chroma samples corresponding to a plurality of pixel groups of a video frame. For each pixel group, an electronic device identifies a respective chroma sample and a set of luma samples and determines an anchor luma sample from the set of luma samples. A chroma refinement value is generated based on the set of luma samples by differencing a respective luminance value of each luma sample in the set by an anchor luminance value of the anchor luma sample and applying a cross component filter to the difference luminance values of the set of luma samples. The electronic device then updates the chroma sample using the chroma refinement value for each pixel group and stores the updated respective chroma sample of each pixel group in association with the video frame.

Abstract: An electronic apparatus performs a method of encoding and decoding video data. The method comprises: decoding a first coding block and a second coding block that shares a common edge on a first picture, wherein decoding the first coding block and the second coding block includes reconstructing a first residual block for the first coding block and a second residual block for the second coding block; determining that the first picture has a first resolution, a first reference picture corresponding to the first coding block has a second resolution, and a second reference picture corresponding to the second coding block has a third resolution; deriving a deblocking strength (bS) value based, at least in part, on the first resolution, second resolution, and the third resolution; and performing in-loop filtering on the reconstructed first residual block and the reconstructed second residual block using a deblocking filter in accordance with the derived bS value.

Abstract: A method for video decoding is provided. The method includes obtaining, from a video bitstream, a coding unit in a current picture; selecting a plurality of sets of neighboring samples of the coding unit; determining one or more cross-component prediction models based on the plurality of sets of neighboring samples; obtaining at least one reconstructed luma sample in the luma block that corresponds to a chroma sample in the at least one chroma block; and applying at least one of the one or more cross-component prediction models to the at least one reconstructed luma sample to predict the chroma sample.

Abstract: The present disclosure provides a method for decoding video data, comprising: obtaining a bitstream; obtaining an indication from the bitstream indicative of information related to a gradient linear model (GLM), wherein the GLM is used to obtain one or more filtered values based on intensity differences among luma samples; and decoding the video data based on the information related to the GLM.

Abstract: This application is directed to coding video data including a plurality of transform blocks according to a transform skip mode. Two or more control flags are obtained with the video data to indicate signaling of a Rice parameter for the transform blocks on different hierarchical levels. In accordance with a determination that a first control flag is enabled on a first hierarchical level and a second control flag is enabled on a second hierarchical level lower than the first hierarchical level, entropy coding is performed for a subset of the transform blocks based on a Rice parameter obtained with the video data. In accordance with a determination that the first control flag is enabled and that the second control flag is disabled on the second hierarchical level, entropy coding is performed for the subset of the transform blocks based on a predetermined Rice parameter at the second hierarchical level.

Abstract: Methods and apparatuses for video coding are provided. A method includes signaling a first syntax element for determining whether information of one or more reference picture lists is present in a picture header (PH) associated with a picture; and signaling the information of the one or more reference picture lists in the PH in a case that the first syntax element has a first value, wherein in a case that the information of the one or more reference picture lists is signaled in the PH and one or more slices associated with the picture are determined, from the information of the one or more reference picture lists, as being not bi-predictive, one or more second syntax elements in the PH are not parsed.

Abstract: Methods and apparatuses for video coding are provided. The method includes that a decoder determines whether a disable flag is present in a picture header (PH) associated with a picture, wherein the disable flag specifies whether a coding tool is disabled in one or more slices associated with the PH. Additionally, the method includes that the decoder infers value of the disable flag according to one or more enable flags signaled in a sequence parameter set (SPS) of the picture in response to determining that the disable flag is not present in the PH, inferring, by the decoder.

Abstract: An electronic apparatus performs a method of encoding video data. The method comprises: determining a first syntax element for a first set of palette mode coding units at a first coding level; in accordance with a determination that the first syntax element has a first predefined value: choosing a first binarization process for samples of the first set of palette mode coding units; encoding, into bitstream, the samples of the first set of palette mode coding units using the first binarization process; in accordance with a determination that the first syntax element does not have the first predefined value: choosing a second binarization process for the samples of the first set of palette mode coding units, the second binarization process being different from the first binarization process; and encoding, into the bitstream, the samples of the first set of palette mode coding units using the second binarization process.

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: A method for video decoding is provided. The method includes obtaining, from a video bitstream, a coding unit in a current picture, wherein the coding unit comprises a luma block and at least one chroma block; and in response to a determination that reconstructed luma samples in the luma block are not to be down-sampled: determining one or more cross-component prediction models based on a luma filter, wherein the one or more cross-component prediction models comprise a convolutional cross-component model (CCCM); obtaining, based on the luma filter, at least one reconstructed luma sample in the luma block that corresponds to a chroma sample in the at least one chroma block; and applying at least one of the one or more cross-component prediction models to the at least one reconstructed luma sample to predict the chroma sample.

Abstract: An electronic apparatus performs a method of coding video data. The method comprises: receiving, from the bitstream, the video data corresponding to a coding unit, wherein the coding unit is coded by intra-prediction mode or inter-prediction mode; receiving a first syntax element from the video data, wherein the first syntax element indicates whether the coding unit has been coded using adaptive color-space transform (ACT); processing the video data to generate residuals of the coding unit; in accordance with a determination based on the first syntax element that the coding unit has been coded using the ACT, performing a clipping operation that confines a dynamic range of the residuals of the coding unit within a predefined range; and applying an inverse ACT to the residuals of the coding unit after the clipping operation.