Abstract: This disclosure relates signaling of adaptive resolution for motion vector difference in video encoding and decoding. An example method is disclosed decoding one or more video blocks of a video stream. The method may include receiving the video stream; extracting an inter-prediction syntax element from the video stream to determine whether an ADAPTMV mode is signaled for one or more video blocks, the ADAPTMV mode being a single-reference inter-prediction mode with adaptive motion vector difference (MVD) pixel resolution; determining a current MVD pixel resolution associated with the one or more video blocks abased on whether the ADAPTMV mode is signaled in the inter-prediction syntax element; and extracting and decoding one or more MVD-related syntax elements associated with the one or more video blocks based on whether the ADAPTMV mode is signaled in the inter-prediction syntax element and the current MVD pixel resolution.

Abstract: A Method of decoding an encoded video bitstream using at least one processor includes: obtaining an encoded video bitstream, the encoded video bitstream including encoded color components; entropy parsing the encoded color components; dequantizing the color components and obtaining transform coefficients of the color components; applying a joint components secondary transform (JCST) on the transform coefficients of the color components, thereby generating JCST outputs; performing a backward transform on the JCST outputs, thereby obtaining residual components of the color components; and decoding the encoded video bitstream based on the residual components of the color components.

Abstract: Disclosed is a method for video encoding and decoding using adaptive color transform on a residual signal. In particular, the maximum memory size required for adaptive color transform is limited by: controlling whether to allow color space conversion on a sequence level according to a syntax element indicating the maximum conversion size allowed for a sequence of pictures; or controlling whether to apply color space conversion on a block level according to the size of a coding block.

Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.

Abstract: A method of video decoding includes determining directionality information of a restoration filter unit included in a video frame based on directionality of each of one or more groups of pixels in the restoration filter unit determined by at least one of a previously performed CDEF process or a previously performed intra prediction coding process. The method also includes selecting, based on the directionality information of the restoration filter unit, a set of filter parameters from among a plurality of sets of filter parameters of a restoration filter process, and, after the at least one of the previously performed CDEF process or the previously performed intra prediction coding process, performing one of a Wiener filter process or a self-guided projection filter process as the restoration filter process on the restoration filter unit based on the selected set of filter parameters.

Abstract: A video decoding apparatus is a video decoding apparatus for deriving a prediction image by using a reference picture included in a reference picture list.

Abstract: A method for video encoding includes determining whether a current block in a picture to be included in a coded video bitstream meets a size requirement and, in response to determining that the current block meets the size requirement, determining an intra block copy prediction mode usage flag for the current block based on a type of a tile group or slice to which the current block belongs. In response to determining that the current block meets the size requirement, the method further includes determining, based on the IBC prediction mode usage flag, an IBC prediction mode that is separate from an inter prediction mode and an intra prediction mode, determining a block vector that points to a reference area in the picture in response to the determination of the IBC prediction mode, and encoding the current block based on reference samples within the reference area in the picture.

Abstract: Provided in the present application are a picture prediction method, encoder, decoder and storage medium. If a current block uses an MIP mode to determine its intra prediction value, the encoder sets a value of an MIP mode parameter as indicating use of the MIP mode and signals into a bitstream; determines the MIP mode of the current block and signals into the bitstream; determines, based on the MIP mode, prediction values for luma and chroma components of the current block. The decoder parses the bitstream and determines an MIP mode parameter of the current block; if its value indicates that the current block uses the MIP mode to determine its intra prediction value, parses the bitstream, determines the MIP mode of the current block and prediction values of luma and chroma components of the current block based on the MIP mode; decodes the current block based on prediction values.

Abstract: Provided is a complex light modulator including a phase modulator, and an amplitude modulator, wherein the phase modulator and the amplitude modulator are configured to generate a first complex pixel having first complex light modulation characteristics and a second complex pixel having second complex light modulation characteristics, wherein the first complex pixel includes first sub-complex pixels that are provided in a 3×3 format and are configured to implement the first complex light modulation characteristics, wherein the second complex pixel includes second sub-complex pixels that are provided in a 3×3 format and are configured to implement the second complex light modulation characteristics, and wherein the first complex pixel and the second complex pixel respectively include a first overlapping pixel that is included in the first sub-complex pixels and the second sub-complex pixels.

Abstract: A device may be configured to determine that the neural network post-filter characteristics message provides a neural network update. In one example, a neural network post-filter characteristics message includes a syntax element having a value specifying that a post-processing filter associated with the message is a neural network identified by a specified tag Uniform Resource Identifier (URI) and neural network information URI. The neural network post-filter characteristics message further includes a syntax element having a value specifying that particular syntax elements are not present in the neural network post-filter characteristics message. Based on the values of the syntax elements it may be determined that the neural network post-filter characteristics message provides a neural network update.

Abstract: A video decoding method performed by a video decoding device according to this document comprises the steps of: parsing prediction weighted table syntax from a bitstream; parsing information on the number of reference pictures in a reference picture list from the prediction weighted table syntax; deriving weights for weighted prediction on the basis of the information on the number of reference pictures; deriving prediction samples of a current block by performing weighted prediction for the current block on the basis of the weights; and reconstructing a current picture on the basis of the prediction samples, wherein the prediction weighted table syntax may be parsed from a picture header of the bitstream.

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for providing signaling schemes for motion vector difference. An example method for decoding a current video block of a video bitstream is disclosed. The method includes receiving a coded video bitstream; obtaining, from the coded video bitstream, a first motion vector difference (MVD) and a dynamic reference list (DRL) index for a current video block; deriving a second MVD for the current video block based on the first MVD; generating, by the device, a motion vector (MV) pair based on the first MVD, the derived second MVD, and a motion vector predictor (MVP) indicated by the DRL index; and decoding, by the device based on the MV pair, the current video block.

Abstract: The solution presented herein defines from which previously decoded picture to retrieve the values for calculating POC of the current picture regardless of how many temporal layers have been decoded. That is achieved by determining the POC of the current picture, to be used by the decoder, as a sum of a syntax element pic_order_cnt_lsb and most significant bits of the POC, PicOrderCntMsb, of the current picture, wherein the PicOrderCntMsb of the current picture is derived using at least a prevPicOrderCntMsb and a prevPicOrderCntLsb and the prevPicOrderCntMsb is set equal to the most significant bits of the POC of a previous reference picture in decoding order that has a layer identity equal to zero and prevPicOrderCntLsb is set equal to the value of the least significant bits of the POC of a previous reference picture in decoding order that has a layer identity equal to zero.

Abstract: According to the disclosure of the present document, an NAL unit type for slices in a picture may be determined on the basis of NAL unit type-related information relating to whether the picture has a mixed-NAL unit type, and a type mixed with another type of NAL unit as well as an IRAP for a picture having the mixed-NAL unit type may be provided.

Abstract: A light source (11) of a disguising mask detecting device (1) emits light at a person who is a subject. A camera (12) acquires images in multiple different wavelength ranges of reflected light of the light emitted at the person. A face detector (172) detects a face region of the person from the images acquired by the camera (12). A determiner (173) determines that the person is wearing a disguising mask when luminances of the face region in the images satisfy specific relations different from relations exhibited by skin.

Abstract: This disclosure relates encoding and decoding of motion vector difference in for inter-predicting a video block. An example is disclosed for decoding an inter-predicted video block of a video stream. The method includes deriving an inter-prediction mode for the video block from the video stream; deriving a motion vector prediction mode for the video block; deriving, from the video stream, a context for signaling a set of syntax elements associated with a Motion Vector Difference (MVD) associated with the video block based on the inter-prediction mode and/or the motion vector prediction mode; and decoding the video block based on the set of syntax elements and the derived context.

Abstract: Provided are a method and device for encoding or decoding an image by using a block map. In the method and device for decoding an image according to an embodiment set forth herein, a bitstream of an encoded image is received, one or more blocks in a picture are determined using split information obtained from the bitstream, a block map indicating whether or not a previous block among the one or more blocks has been decoded is determined, a neighboring region which is available to be referred to for a current block to be decoded in a certain scan order among the one or more blocks is determined, and the current block is decoded based on the neighboring region which is available to be referred to.

Abstract: Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image based on an inter-prediction mode may include: configuring a merge candidate list by using motion information of a spatial candidate and a temporal candidate adjacent to a current block; parsing a first syntax element indicating a particular candidate applied to inter-prediction of the current block among a predefined number of candidates in the merge candidate list; deriving a refined candidate by adding a motion vector offset to a motion vector of a candidate indicated by the first syntax element; and generating a prediction block of the current block by using the motion information of the refined candidate.

Abstract: An image decoding method according to the present document comprises the steps of: acquiring image information through a bitstream, the image information including entry point-related information; deriving at least one entry point in the current picture on the basis of the entry point-related information; and decoding the current picture on the basis of the at least one entry point, wherein the entry point-related information includes an entry point offset presence flag, offset length information, and entry point offset information, the entry point offset presence flag being related to at least one of the number of tiles in the current picture or the number of tile columns in the current picture. Through this method, the amount of data required to be signaled for video/image coding can be reduced, and coding efficiency can be increased.

Abstract: A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, at least one of a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header, or a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of at least one of the first flag or the second flag; and generating reconstructed samples on the basis of the prediction samples.