Abstract: A method of decoding video data by a device is provided. A merge subblock flag specifying whether subblock-based inter prediction parameters for a coding unit are inferred from neighbouring blocks is decoded. A motion vector difference merge flag is decoded if a value of the merge subblock flag is equal to zero and a value of a motion vector difference flag is equal to one. The motion vector difference merge flag specifies a prediction parameter with a motion vector difference is used, and the motion vector difference flag specifies whether a merge mode with motion vector difference is enabled.

Abstract: Some embodiments provide a method of decoding a current video block in a video picture. From several partitioning schemes, the method identifies a partitioning scheme that is used to partition the current video block. Based on the identified partitioning scheme, the method selects one derivation to compute a first quantization parameter for the current video block from several candidate derivations for computing the first quantization parameter. The method computes a second quantization parameter for the current video block based at least in part on the computed first quantization parameter. The method then uses the computed second quantization parameter to decode the current video block.

Abstract: A method of encoding and decoding video data is described. According to an aspect of an invention, luma and chroma components may have separate quadtree plus binary tree (QTBT) structures and a scaling parameter for a chroma coding block is determined based on one or more properties of a luma component.

Abstract: A method of performing motion vector prediction for coding video data is disclosed. A full precision motion vector mv is determined for generating a prediction for video block in a first picture. A rounded motion vector rmv having a less precision than the full precision motion vector mv is stored. A motion vector predictor candidate is generated for a video block in a second picture from the stored motion vector.

Abstract: A method of decoding video data by a device is provided. Level values corresponding to a chroma coding block are received. The chroma coding block is one of chroma coding blocks resulting from partitioning a chroma coding tree block. A luma coding tree block corresponding to the chroma coding tree block is partitioned into luma coding blocks which are organized into quantization groups such that luma quantization parameters are determined for the luma coding tree block. One of the luma quantization parameters that is mapped to the chroma coding block is identified. A predictive quantization parameter is derived by using a value derived from the identified luma quantization parameter. A chroma quantization parameter is determined by adding a delta quantization parameter associated with each of the chroma coding blocks to the predictive quantization parameter. Transform coefficient values are generated based on the determined chroma quantization parameter.

Abstract: A device may be configured to parse a syntax element specifying the number of available languages within a presentation associated with an audio stream. A device may be configured to parse one or more syntax elements identifying each of the available languages and parse an accessibility syntax element for each language within the presentation.

Abstract: An electronic device of decoding a current video block in a video picture is provided. The electronic device determines whether a partitioning scheme of the current video block is a single tree partitioning or a dual tree partitioning. The electronic device selects, based on the partitioning scheme, one derivation from candidate derivations to compute a first predictive quantization parameter (QP) for the current video block. A first derivation comprises computing the first predictive QP based at least in part on another QP and an additional value when the partitioning scheme is the single tree partitioning. A second derivation comprises computing the first predictive QP by using a previously-derived QP when the partitioning scheme is the dual tree partitioning. The electronic device computes a second QP based at least in part on the first predictive QP and an offset value, and use the second QP to decode the current video block.

Abstract: A device may be configured to parse a syntax element specifying the number of available languages within a presentation associated with an audio stream. A device may be configured to parse one or more syntax elements identifying each of the available languages and parse an accessibility syntax element for each language within the presentation.

Abstract: This invention relates to a method of coding video data. The method comprising: determining a largest coding unit size for a picture; determining whether a largest coding unit within a picture is an intra type largest coding unit; and applying a partitioning to the largest coding unit based on whether the largest coding unit is an intra type largest coding unit.

Abstract: Method, device, apparatus, and computer-readable storage medium to determine whether video block is a fractional boundary video block (See paragraph [0032] and FIG. 7.) and to partition the fractional boundary video block into inferred partitions using a subset of available partition modes (See paragraph [0033] and FIG. 8.) are disclosed.

Abstract: A method of generating a prediction for an area of video data, comprises Receiving a rectangular video block including sample values, and for each sample included in the video block, generating a predictive simple value by averaging a horizontal interpolation and a vertical interpolation corresponding to the location of the sample within the video block.

Abstract: A method of filtering reconstructed video data is disclosed. The method comprising: inputting a reconstructed luma picture sample array; setting a luma location corresponding to a current chroma sample to a location defined by a horizontal location in the chroma sample multiplied by a sub-width value and a vertical location in the chroma sample multiplied by a sub-height value; deriving luma sample locations inside the reconstructed luma picture sample array by using the luma location; and deriving a variable by using cross-component filter coefficients and the reconstructed luma picture sample array defined by at least one of the luma sample locations, wherein the variable is modified by using a current chroma block of samples.

Abstract: Method, device, apparatus, and computer-readable storage medium to determine whether video block is a fractional boundary video block (See paragraph [0032] and FIG. 7.) and to partition the fractional boundary video block into inferred partitions using a subset of available partition modes (See paragraph [0033] and FIG. 8.) are disclosed.

Abstract: A method of encoding data includes: receiving an input data set having an arbitrary size about a height dimension and a width dimension; padding the input data set according to a padding function selected from a set of padding functions, such that a data set having a desired size about the height dimension and the width dimension is obtained; generating an output data set by performing a discrete convolution on the obtained data set; and generating a signal providing information corresponding to the output data set and the selected padding function.

Abstract: This invention relates to a method of coding video data. The method comprising: determining a largest coding unit size for a picture; determining whether a largest coding unit within a picture is an intra type largest coding unit; and applying a partitioning to the largest coding unit based on whether the largest coding unit is an intra type largest coding unit.

Abstract: A method of performing motion vector prediction for coding video data is disclosed. A full precision motion vector mv is determined for generating a prediction for video block in a first picture. A rounded motion vector nm having a less precision than the full precision motion vector mv is stored. A motion vector predictor candidate is generated for a video block in a second picture from the stored motion vector.

Abstract: A method of generating a prediction for an area of video data, comprises Receiving a rectangular video block including sample values, and for each sample included in the video block, generating a predictive sample value by averaging a horizontal interpolation and a vertical interpolation corresponding to the location of the sample within the video block.

Abstract: This disclosure relates to video coding and more particularly to techniques for performing deblocking of reconstructed video data. According to an aspect of an invention, reconstructed video data having a 4:2:2 chroma format is received and for a four line decision segment corresponding to a vertical deblocking boundary for a chroma component of the video data, a gradient value is computed using samples included in the first and fourth lines.

Abstract: A method of encoding and decoding video data is described. According to an aspect of an invention, luma and chroma components may have separate quadtree plus binary tree (QTBT) structures and a scaling parameter for a chroma coding block is determined based on one or more properties of a luma component.

Abstract: A method of filtering reconstructed video data is disclosed. The method comprising: inputting reconstructed luma component sample values; deriving a filtered sample value by using cross component filter coefficients and the reconstructed luma component sample values prior to an adaptive loop filtering process; deriving a refinement value for chroma components by using the filtered sample value; and deriving a refined chroma sample value by using a sum of a sample value of chroma components and the refinement value for chroma components.