Abstract: A method of deriving a motion vector difference for coding video data, the method comprises determining whether inter-layer prediction is utilized by determining whether both a reference picture in a first reference picture list is not marked as used for long-term reference and a reference picture in a second reference picture list is not marked as used for long-term reference; based on whether the inter-layer prediction is utilized, setting a scaling factor to one of: a value of 1 in a case where the inter-layer prediction is utilized; or a value in the range of ?4096 to 4095 in a case where the inter-layer prediction is not utilized; and deriving the motion vector difference based on the scaling factor.

Abstract: This disclosure relates to video coding and more particularly to techniques for performing entropy coding. According to an aspect of an invention, a parity level flag specifying a parity of a transform coefficient level at a scanning position is decoded if a value of a second absolute level greater flag is equal to a first value.

Abstract: A method for subdividing an interval during entropy decoding for a bitstream representing a set of video pictures is provided. A sub-interval value is computed by (i) performing an initial right bit-shifting operation on a probability estimator value to reduce a length in bits of the probability estimator value, (ii) multiplying the right bit-shifted probability estimator value by a range value representing the interval, (iii) performing another right bit-shifting operation on a result of the multiplication, and (iv) adding a constant value to a result of the other right bit-shifting operation, wherein the probability estimator value is associated with a probability of a bin having a particular value. The sub-interval value computed based on the right bit-shifted probability estimator value is used to update the interval.

Abstract: This disclosure relates to video coding and more particularly to techniques for performing motion vector prediction. According to an aspect of an invention, a motion vector and a corresponding reference picture identifier for the motion vector are received; a reference picture corresponding to a second motion vector is determined based on the reference picture corresponding to the received motion vector and a current picture; a scaling value is determined based on the determined reference picture, the reference picture corresponding to the received motion vector, and the current picture; and the second motion vector is generated from the received motion vector by scaling with the scaling value.

Abstract: This disclosure relates to video coding and more particularly to techniques for performing entropy coding. According to an aspect of an invention, a parity level flag specifying a parity of a transform coefficient level at a scanning position is decoded if a value of a second absolute level greater flag is equal to a first value.

Abstract: A method of deriving a motion vector difference for coding video data, the method comprises determining whether inter-layer prediction is utilized by determining whether both a reference picture in a first reference picture list is not marked as used for long-term reference and a reference picture in a second reference picture list is not marked as used for long-term reference; based on whether the inter-layer prediction is utilized, setting a scaling factor to one of: a value of 1 in a case where the inter-layer prediction is utilized; or a value in the range of ?4096 to 4095 in a case where the inter-layer prediction is not utilized; and deriving the motion vector difference based on the scaling factor.

Abstract: This disclosure relates to video coding and more particularly to techniques for deriving quantization parameters.

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: Some embodiments provide a method for subdividing an interval during entropy coding for a bitstream representing a set of video pictures. The method performs a bit-shifting operation on a probability estimator value. The method computes a sub-interval value by multiplying a range value representing the interval by the bit-shifted probability estimator value. The method uses the sub-interval value to update the interval.

Abstract: This disclosure relates to video coding and more particularly to techniques for performing a position-dependent intra prediction sample filtering process. In one example, a method of coding video data comprises: deriving an intra prediction angle parameter, deriving an inverse angle parameter based on the intra prediction angle parameter: for a prediction mode included in a defined set of prediction modes, setting a value of a scale variable based on the derived inverse angle: and performing a position-dependent intra prediction sample filtering process using the value of a scale variable.

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: This disclosure relates to video coding and more particularly to techniques for performing motion vector prediction. According to an aspect of an invention, a motion vector and a corresponding reference picture identifier for the motion vector are received; a reference picture corresponding to a second motion vector is determined based on the reference picture corresponding to the received motion vector and a current picture; a scaling value is determined based on the determined reference picture, the reference picture corresponding to the received motion vector, and the current picture; and the second motion vector is generated from the received motion vector by scaling with the scaling value.

Abstract: A method of decoding video data is disclosed. The method comprising: receiving a first array of prediction sample values; receiving a second array of prediction sample values; determining a scale value based on a color component index value and a video sampling format of the video data; and generating a third array of prediction sample values by applying a blending value to the first array of prediction sample values and the second array of prediction sample values, wherein the blending value is based on the scale value.

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: 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 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.

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: This disclosure relates to video coding and more particularly to techniques for intra prediction coding. In one example, a method of decoding video data, the method comprising: parsing a first syntax element having a value indicating an intra sub partitions (ISP) intra prediction is used for coding a current video block; parsing a second syntax element indicating whether a most probable mode (MPM) or a non-most probable mode (MPM) is an intra prediction mode used for generating a prediction for the current video block according to the ISP intra prediction; based on whether the second syntax element indicates the MPM or the non-MPM is an intra prediction mode used for generating a prediction, conditionally parsing one of: a third syntax element indicating the MPM, or a fourth syntax element indicating the non-MPM; and generating a prediction for the current video block based on the first syntax element.

Abstract: A device may be configured to apply adaptive loop filters according to one or more of the techniques described herein.