Abstract: A method of processing a video sequence including images, wherein each image includes blocks of sample values, is provided. The method includes determining input and output lengths for deblocking filtering of the sample values for a first and second side of a potential blocking boundary. The input and output lengths are a number of consecutive sample values, from a sample value closest to the potential blocking boundary to one or more other sample values spaced from the potential blocking boundary. The input and output lengths are determined based on determining whether the potential blocking boundary is identified as an internal sub-block boundary. The method includes deblocking filtering of the sample values on the at least one of the first and second side of the potential blocking boundary, using the input and output lengths, to generate deblocked sample values.

Abstract: An asymmetric deblocking method for deblocking a boundary between a P block and a Q block such that 5 samples within the P block and 7 or 3 samples within the Q block are modified. The method includes determining a value refP based on at least p5, determining a value refQ based on at least qx, wherein qx is q3 or q7; determining a value refMiddle based on at least p0 and q0, wherein p0 is directly adjacent to the boundary and q0 is directly adjacent to the boundary; performing a linear interpolation between refP and refMiddle; and performing a linear interpolation between refQ and refMiddle.

Abstract: A method of processing a video sequence including images, wherein each image includes blocks of sample values, is provided. The method includes determining input and output lengths for deblocking filtering of sample values for a first and second side of a potential blocking boundary. The input and output lengths are consecutive sample values, from a sample value closest to the potential blocking boundary to one or more other sample values spaced from the potential blocking boundary. The input and output lengths are determined based on a number of consecutive sample values from the sample value closest to the potential blocking boundary to another sample value closest to a neighboring potential blocking boundary. The method includes deblocking filtering of the sample values on the at least one of the first and second side of the potential blocking boundary, using the input and output lengths, to generate deblocked sample values.

Abstract: A method of processing a video sequence including images, wherein each image includes blocks of sample values, is provided. The method includes determining input and output lengths for deblocking filtering of the sample values for a first and second side of a potential blocking boundary. The input and output lengths are a number of consecutive sample values, from a sample value closest to the potential blocking boundary to one or more other sample values spaced from the potential blocking boundary. The input and output lengths are determined based on a number of consecutive smooth sample values perpendicular to the potential blocking boundary on respectively the first and/or second side of the potential blocking boundary. The method includes deblocking filtering of the sample values on the at least one of the first and second side of the potential blocking boundary, using the input and output lengths, to generate deblocked sample values.

Abstract: Methods and apparatuses for video processing. In one aspect, filtering is applied after applying a set of offset values to one or more coefficients. The application of an offset value may be based on a determination as to whether the coefficient meets a threshold value.

Abstract: A pixel value of a pixel in a picture of a video sequence is modified by a weighted combination of the pixel value and at least one spatially neighboring pixel value in a filtering. The filtering depends on a pixel distance between the pixel and a neighboring pixel and on a pixel value difference between the pixel and a neighboring pixel value of the neighboring pixel. The filtering is controlled by a spatial parameter and a range parameter. The spatial parameter depends on at least one of a width and a height of a transform block, and on at least one of a prediction type of a block of pixels in the picture, a picture type of the picture, and a slice type of a slice in the picture.

Abstract: A method for encoding or decoding an image of a video sequence is provided. The method comprises obtaining a set of sample values associated with the image. The method comprises determining a relative location of the current sample value with respect to a virtual boundary. The virtual boundary is defined with respect to a block boundary between the first block of sample values and a second block of sample values. The virtual boundary is parallel with the block boundary and separated from the block boundary by at least one row or column of sample values included in the first block of sample values. The method comprises a filter strength value based on the determined relative location of the current sample value with respect to the virtual boundary. The method comprises filtering the current sample value based on the selected filter strength value.

Abstract: According to a first aspect, a method is provided. The method includes obtaining an M×N array of pixel values an image; determining a weight selection value for position x,y in the M×N array; and using the weight selection value to obtain a weight value for use in a filter for filtering the image. Determining the weight selection value for position x,y (omegax,y) includes: a) retrieving a previously determined weight selection value for position x,y?1 (omegax,y?1); b) retrieving a previously determined alpha value (a) for position x,y?1; c) calculating a delta value (d); and d) calculating omegax,y=omegax,y?1?a+d. Calculating d includes: i) retrieving a first previously determined value (omega_row); i) retrieving a second previously determined value (alpha_row); and ii) calculating d=omega_row?alpha_row+abs(Ax+1,y+1?Ax+1,y+2), wherein Ax+1,y+1 is the value stored in position x+1,y+1 of the array and Ax+1,y+2 is the value stored in position x+1,y+2 of the array.

Abstract: An encoder (400), a decoder (450), and methods (20, 30) for partitioning a picture from a sequence of video pictures into a layout having a plurality of flexible tiles or segments is disclosed. Each tile or segment (T) comprises a single rectangular or square region. The encoder generates (22) a partition structure and encodes (28) the tiles according to the partition structure. The encoder also generates a bitstream (12) comprising a plurality of coded segments and information indicating the partition structure used to partition the picture into the plurality of flexible tiles or segments, and sends (29) the bitstream to the decoder. Upon receipt the decoder uses the coded segments and information in the bitstream to decode (38) the plurality of coded segments.

Abstract: A deblocking method for deblocking a boundary between a first block of samples, block P, and a second block of samples, block Q. The method includes determining whether at least one of the P block or the Q block is a combined intra-inter prediction block; and, as a result of determining that at least one of the P block or the Q block is a combined intra-inter prediction block, deblocking the boundary between the P block and the Q block.

Abstract: An encoder (400), a decoder (450), and methods (230, 30) for partitioning a picture from a sequence of video pictures into a layout having a plurality of flexible tiles or segments is disclosed. Each tile or segment (T) comprises a single rectangular or square region. The encoder generates (22) a partition structure and encodes (28) the tiles according to the partition structure. The encoder also generates a bitstream (12) comprising a plurality of coded picture segments and information indicating the partition structure used to partition the picture into the plurality of flexible tiles or segments, and sends (29) the bitstream to the decoder. Upon receipt, the decoder uses the coded picture segments and information in the bitstream to decode (38) the plurality of coded picture segments.

Abstract: An asymmetric deblocking method for deblocking a boundary between a P block and a Q block such that 5 samples within the P block and 7 or 3 samples within the Q block are modified. The method includes determining a value refP based on at least p5, determining a value refQ based on at least qx, wherein qx is q3 or q7; determining a value refMiddle based on at least p0 and q0, wherein p0 is directly adjacent to the boundary and q0 is directly adjacent to the boundary; performing a linear interpolation between refP and refMiddle; and performing a linear interpolation between refQ and refMiddle.

Abstract: An encoded video sequence including a plurality of images may be decoded. First and second adjacent blocks of an image of an encoded video sequence may be provided. A line of pixels including pixels of the first and second blocks may be defined extending across a boundary between the first and second blocks. A first reference value may be calculated based on a first pixel of the pixels from the first block. A second reference value may be calculated based on a second pixel of the pixels from the second block. Filtered pixel values for each pixel of the line of pixels between the first pixel and the second pixel may be calculated using interpolation based on the first and/or second reference values. Filtered blocks may be generated using the filtered pixel values, and a decoded video sequence may be generated based on the filtered blocks.

Abstract: A pixel value of a pixel in a picture of a video sequence is modified by a weighted combination of the pixel value and at least one spatially neighboring pixel value in a filtering. The filtering depends on a pixel distance between the pixel and a neighboring pixel and on a pixel value difference between the pixel and a neighboring pixel value of the neighboring pixel. The filtering is controlled by a spatial parameter and a range parameter. The spatial parameter depends on at least one of a width and a height of a transform block, and on at least one of a prediction type of a block of pixels in the picture, a picture type of the picture, and a slice type of a slice in the picture.

Abstract: It is presented a method for encoding a video frame of a piece of video content. The method is performed in an encoder device and comprises the steps of: dividing the video frame into a set of non-overlapping regions, wherein the set comprises at least one region; assigning each region, in the set of regions, to a separate processing unit; encoding, in each processing unit, picture data of the respective region; collecting progress data from each processing unit, the progress data indicating progress of the encoding of the respective region; and dividing a particular region into a plurality of smaller regions and assigning each smaller region to a separate processing unit, when the progress data indicates that progress of encoding the particular region is insufficient.

Abstract: A multi-layer or multi-view video is encoded by encoding one of a picture in a first layer or view and a picture in a second layer or view coinciding at a switching point defining a switch between the first layer or view and the second layer or view. The other of the picture in the first layer or view and the picture in the second layer or view coinciding at the switching point is encoded as a skip picture. The embodiments thereby reduce complexity of encoding and decoding multi-layer or multi-view video having a switching point and reduce the number of bits required for representing encoded pictures coinciding at the switching point.

Abstract: A hybrid codec scalable video bitstream comprises first encapsulation units carrying video data of a base layer and encoded according to a first video coding standard and second encapsulation units carrying video data of at least one enhancement layer and encoded according to a second video coding standard. A prefix syntax element is added to each second encapsulation unit. The prefix syntax element has a value triggering a legacy decoder to discard or ignore the second encapsulation units. A non-legacy decoder selects, based on the value of a first portion of each of the first and second encapsulation units, whether to decode the encapsulation unit according to the first video coding standard or remove the first portion from the encapsulation unit and decode the remaining portion of the encapsulation unit according to the second video coding standard.

Abstract: It is presented a method for encoding a video frame of a piece of video content. The method is performed in an encoder device and comprises the steps of: dividing the video frame into a set of non-overlapping regions, wherein the set comprises at least one region; assigning each region, in the set of regions, to a separate processing unit; encoding, in each processing unit, picture data of the respective region; collecting progress data from each processing unit, the progress data indicating progress of the encoding of the respective region; and dividing a particular region into a plurality of smaller regions and assigning each smaller region to a separate processing unit, when the progress data indicates that progress of encoding the particular region is insufficient.

Abstract: A multi-layer or multi-view video is encoded by encoding one of a picture in a first layer or view and a picture in a second layer or view coinciding at a switching point defining a switch between the first layer or view and the second layer or view. The other of the picture in the first layer or view and the picture in the second layer or view coinciding at the switching point is encoded as a skip picture. The embodiments thereby reduce complexity of encoding and decoding multi-layer or multi-view video having a switching point and reduce the number of bits required for representing encoded pictures coinciding at the switching point.

Abstract: A hybrid codec scalable video bitstream comprises first encapsulation units carrying video data of a base layer and encoded according to a first video coding standard and second encapsulation units carrying video data of at least one enhancement layer and encoded according to a second video coding standard. A prefix syntax element is added to each second encapsulation unit. The prefix syntax element has a value triggering a legacy decoder to discard or ignore the second encapsulation units. A non-legacy decoder selects, based on the value of a first portion of each of the first and second encapsulation units, whether to decode the encapsulation unit according to the first video coding standard or remove the first portion from the encapsulation unit and decode the remaining portion of the encapsulation unit according to the second video coding standard.