Abstract: Systems, methods, and instrumentalities are disclosed for performing motion compensation with long-term history-based motion vector predictor candidate(s). A device configured for performing such motion compensation may include a processor. The processor may be configured to obtain a long-term motion vector predictor candidate. The processor may also be configured to add the long-term motion vector predictor candidate to a history-based motion vector prediction (HMVP) list for a current block. The processor may also be configured to decode the current block using the HMVP list having the long-term motion vector prediction candidate.

Abstract: PROF (Prediction Refinement with Optical Flow) and BDOF (Bi-directional Optical Flow) use the optical flow model to provide sample-wise motion compensation refinement. In one implementation, to calculate the spatial gradients in BDOF, an extended region is generated around a block to be coded. To simplify the computation, BDOF may use the same padding operations as in PROF, namely, a padding sample is copied from the nearest integer neighbor in the reference picture. BDOF and PROF can also be used together when sub-block based affine motion-compensated prediction is used. BDOF can be applied after PROF generates new prediction blocks, or BDOF can use the spatial gradients in the original prediction blocks to re-use the computations with PROF. In addition, BDOF and PROF operations can be combined, and the prediction adjustment will be directly based on the spatial gradients in the original prediction blocks.

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, one or more chroma residual scaling parameters are determined based one or more luma mapping parameters and based on a corrective value of the one or more chroma residual scaling parameters. The video is encoded or decoded based on the determined one or more chroma residual scaling parameters.

Abstract: Video signal coding and decoding functions can generate lists of potential candidates to use in coding and decoding, for example, predictors. Video signal coding component candidate undergo operations before potential inclusion in candidate lists. The candidates are checked after being modified by the operations to see if other equal candidates are already in the candidate list. If equal candidates are not in the list, the modified candidates are added to the candidate list. If equal candidates are already in the list, the modified candidates are not added to the list. Operations that can be performed comprise rounding and clipping.

Abstract: Various embodiments relate to a video coding system in which some elements required for decoding are generated according to a process that not specified within the video coding system. This process is hereafter referenced to as being the “external” process. This external process may generate “external” reference pictures to be used by a decoder that is adapted to use these external pictures. Encoding method, decoding method, encoding apparatus, decoding apparatus based on this post-processing method are proposed.

Abstract: In one implementation, KLT transform matrices are derived during the encoding or decoding process. In particular, the KLT transform matrices can be derived for either the primary transforming stage or the secondary transforming stage, or both. Because the KLT transform matrices can be derived at both the encoder and decoder sides, the KLT transform matrices do not need to be signaled in the bitstream. To derive the KLT transform matrix for a current block to be encoded or decoded, a template for the current block is defined, and is used to search in reconstructed regions multiple blocks with templates similar to the current template. Those multiple blocks are used to train the KLT transform matrix.

Abstract: An integrated circuit includes a substrate with an active area, a first insulating layer, a second insulating layer, and a phase-change material. The integrated circuit further includes a heating element in an L-shape, with a long side in direct physical contact with the phase-change material and a short side in direct physical contact with a via. The heating element is surrounded by first, second, and third insulating spacers, with the first insulating spacer having a planar first sidewall in contact with the long side of the heating element, a convex second sidewall, and a planar bottom face in contact with the short side of the heating element. The second and third insulating spacers are in direct contact with the first insulating spacer and the long side of the heating element.

Abstract: To encode a coding unit in the inter modes, there exist multiple inter modes that signal the motion information using a Motion Vector Predictor (MW) list. The MW lists for different coding modes include spatial predictors. In one embodiment, for all coding modes that use MVP lists, the top spatial predictor is first added to the motion vector predictor list before the left spatial predictor. In another embodiment, a subset of coding modes adds the top spatial predictor before the left spatial predictor, and another subset of coding modes adds the left spatial predictor before the top spatial predictor. For example, all merge modes add the top spatial predictor first, and all AMVP modes add the left spatial predictor first. In another example, all non-sub-block modes add the top spatial predictor first, and all sub-block modes add the left spatial predictor first.

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on linear weighted intra prediction, also called matrix based intra prediction, are presented. Accordingly, for a block being encoded or decoded in linear weighted intra prediction, obtaining intra predicted samples from at least two matrix-vector products between at least two selected weight matrices of reduced size and a set of neighboring reference samples. Advantageously, such arrangement allows to reduce the amount of memory for storing data and to reduce the complexity of the intra prediction samples computation.

Abstract: Systems, methods, and instrumentalities are disclosed for most probable mode (MPM) list generation with template-based intra mode derivation (TIMD). An example method involves determining an intra coding mode derivation process is enabled for a first coding block; based on the intra coding mode derivation process being enabled for the first coding block, generating a first MPM list for the first coding block based on a first MPM list generation process; decoding the first coding block based on the first MPM list; determining that the intra coding mode derivation process is disabled for a second coding block; based on the intra coding mode derivation process being disabled for the second coding block, generating a second MPM list for the second coding block based on a second MPM list generation process, different from the first MPM list generation process; and decoding the second coding block based on the second MPM list.

Abstract: Methods and apparatuses to improve compression efficiency in a video compression scheme are described to enable flexible use of local illumination compensation. Such methods comprise individual local illumination compensation for components of a video block. Such methods also comprise flexible derivation methods for illumination compensation information. In one embodiment, local illumination compensation information can be inherited from other others, such as neighboring blocks.

Abstract: Systems, methods, and instrumentalities are disclosed herein for the field of video compression. Examples herein aim at improving compression efficiency compared to existing video compression systems. In examples, a video coding device may identify a reference picture of a block (e.g., a current block). The reference picture may include a number of regions divided by a boundary. A motion compensated block associated with the current block) in the reference picture may be identified. Whether to use an inter prediction coding tool based on a position of the motion compensated block relative to the block is determined. The current block may be coded based on the determination of whether to use the inter prediction coding tool. For example, the number of regions may include a first region defining a clean area and a second region defining a dirty area in Gradual Decoding Refresh (GDR).

Abstract: A method for decoding a video sequence representing original video data comprising a first picture of the video sequence having a feature related to a chroma component of the first picture different from a same feature related to a chroma component of a second picture of the video sequence, the feature related to a chroma component being representative of a chroma format and/or of a relative position of chroma samples with respect to luma samples.

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a number of states used in a dependent quantization DQ is determined for a transform block; and the DQ/inverse DQ with the determined number of states is applied to the transform block. According to non-limiting examples, the usage of DQ and the number of states used for DQ is based on the number of coded coefficients in the transform block, the transform block size, the prediction mode (intra/inter) of the block, the color components (luma/chroma), the quantization parameter of the block, the transforms type.

Abstract: Template based derivation of intra sub-partitioning (ISP) mode is used to improve coding efficiency of intra predicted coded video blocks. The template is formed from surrounding reconstructed top and left samples. In one embodiment, ISP is performed independently from template based intra mode derivation (TIMD). The derivation of an intra sub-block partition mode is determined from template pixels using a current prediction mode for either an upper or left template. In another embodiment, ISP and TIMD are combined. In a further embodiment, a flag is signaled to communicate template based intra mode derivation and intra sub-block partition usage.

Abstract: Decoding and/or encoding video information included in a bitstream can involve a predicted quantization matrix associated with at least a portion of the video information and a syntax element indicating that at least one coefficient of the predicted quantization matrix is to be interpreted as a residual such that the decoding and/or encoding of at least a portion of the video information is based on a combination of the predicted quantization matrix and the residual, where the syntax element is obtained from the bitstream during decoding, or included in the bitstream during encoding.

Abstract: A video coding system handling at least a block of at least an image of a video comprises an encoding process and decoding process respectively providing or using signaling information related to the video, wherein the signaling information comprises at least an information representative of the presence of chroma offset values, wherein when chroma is present and does not use separate color planes, the information representative of the presence of chroma offset values is set and the signaling information further comprises information representative of a chroma offsets values and wherein when chroma is not present or uses separate color planes, the information representative of the presence of chroma offset values is reset and no information representative of a chroma offsets values is further signaled.

Abstract: A method and apparatus for processing video information comprises determining a chroma component prediction for a current block based on samples of a selected block, the block being selected in an area of decoded picture information based on a template matching process comprising a comparison of a template associated with the current block to at least one other template associated with at least one other block in an area of decoded picture information.

Abstract: A coding unit having a size multiple of three in horizontal or vertical direction is coded through one of several embodiments. In one embodiment, for some block sizes, the coding unit is coded and decoded systematically through SKIP mode. In another embodiment, the coding units can be coded in SKIP mode or with a DC coefficient. In another embodiment, an asymmetric division of a common coding unit parent is performed and transform coefficients are factorized among at least two sub-blocks to encode a coding unit. In another embodiment, a separable two dimensional transform can be applied by applying a transform over the block in one direction, and using two one-dimensional transforms on sub-blocks in the other direction to code. Methods, apparatus, and signal embodiments are provided for encoding and decoding.

Abstract: A block of video data is split using one or more of several possible partition operations by using the partitioning choices obtained through use of a texture-based image partitioning. In at least one embodiment, the block is split in one or more splitting operations using a convolutional neural network. In another embodiment, inputs to the convolutional neural network come from pixels along the block's causal borders. In another embodiment, boundary information, such as the location of partitions in spatially neighboring blocks, is used by the texture analysis. Methods, apparatus, and signal embodiments are provided for encoding.