Abstract: A method for decoding a picture. The method includes determining a picture width value (PW) for the picture and determining tile width value (TW) based on one or more code words from a bitstream. The method also includes obtaining a remaining width value (RW), where RW value is less than or equal to X, where X is equal to PW?TW. The method also includes determining whether RW is not less than TW. And the method also includes, as a result of determining that RW is not less than TW, setting the value of a column width variable equal to TW.

Abstract: A method (400) performed by a decoder. The method includes the decoder receiving (s402) a plurality of Network Abstraction Layer, NAL, units, wherein the plurality of NAL units comprises: i) one or more Video Coding Layer, VCL, NAL units comprising pixel data for one or more pictures and ii) a first non-VCL NAL unit, characterized in that the first non-VCL NAL unit comprises: i) at least a first syntax element identifying at least a first data type, DT1, and ii) semantic information that comprises at least a first feature for one or more machine vision tasks, wherein the first feature comprises at least first data of the first data type. The method also includes the decoder obtaining (s404) the first feature from the first non-VCL NAL unit.

Abstract: Providing backward compatibility in terms of a media bitstream and a media player conforming to different versions of a media bitstream syntax specification. In one embodiment, a bitstream is made backward compatible by including in the bitstream a first entry for a feature available in the media bitstream and second entry for an updated feature available in the media bitstream, where the first entry is understood both by a media player supporting a first version of a syntax specification and a media player supporting an updated version of the syntax specification, and the second entry is understood by the media player supporting the updated version of the syntax specification, but is not understood by the media player supporting the first version of the syntax specification.

Abstract: There are provided mechanisms for processing encoded image data. The method comprises receiving an encoded bitstream comprising parameter set information. The parameter set information may comprise a syntax indicator, a first coded portion comprising first coded sample information for a picture and a second coded portion comprising second coded sample information for the picture. The method further comprises, responsive to a first value of the syntax indicator, decoding the first coded sample information using a picture header syntax element from a picture header of the encoded bitstream. The method further comprises, responsive to the first value of the syntax indicator, decoding the second coded sample information using the picture header syntax element from the picture header of the encoded bitstream.

Abstract: A method for decoding a picture comprising a virtual boundary from a coded video bitstream. The method includes determining one or more of a maximum picture width or a maximum picture height from one or more syntax elements S1 in the coded video bitstream and determining one or more of a current picture width or a current picture height from one or more syntax elements S2 in the coded video bitstream. The method also includes determining that a virtual boundary syntax element in the coded video bitstream is encoded with a bit length derived from (i) one or more of the maximum picture width or the maximum picture height or (ii) one or more of the current picture width or the current picture height.

Abstract: A method for deriving a value for a first syntax element, Syntax_A. The method comprises determining whether Syntax_A is present in a bitstream. The method comprises, as a result of determining that Syntax_A is not present in the bitstream, deriving the value for Syntax_A to be equal to a first value, B, if a first condition is satisfied, or deriving the value for Syntax_A to be equal to a second value, C, if a second condition is satisfied.

Abstract: A methods and apparatuses for encoding or decoding a segment in a coded picture. The decoding may include obtaining from a bitstream a value of a first codeword that indicates whether the coded picture may contain bi-directional inter coded segments or not. The decoding may include, based on the value of the first codeword, deriving one or more parameter values by either (a) decoding one or more parameters from the bitstream to obtain the one or more parameter values or (b) inferring the one or more parameter values. The decoding may include decoding the segment in the coded picture based on the one or more parameter values. The encoding may include encoding the first codeword to the bitstream and determining whether to encode one or more parameter values in the bitstream based on a determination of whether the coded picture will contain bi-directional inter coded segments or not.

Abstract: A method for decoding a picture from a bitstream. In one embodiment, The method includes: receiving a slice header for a slice of the picture, wherein the slice header comprises a state syntax element; decoding a state value from the state syntax element in the slice header, wherein a) if the state value is not equal to a first value, then the state value indicates that i) the bitstream includes for the picture a picture header comprising a set of picture syntax elements and ii) the slice header does not comprise the set of picture syntax elements and b) if the state value is equal to the first value, then the state value indicates that i) the slice header contains said set of picture syntax elements and ii) the bitstream does not include a picture header for the picture; and using the set of picture syntax elements to decode the slice of the picture.

Abstract: An encoder, a decoder, and methods 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 comprises a single rectangular or square region. The encoder generates a partition structure and encodes the tiles according to the partition structure. The encoder also generates a bitstream 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 the bitstream to the decoder. Upon receipt, the decoder uses the coded segments and information in the bitstream to decode the plurality of coded segments.

Abstract: In encoding a picture, comprising a plurality of tiles, into a bitstream, a method and apparatus is provided for signaling the tile attribute values per-tile, using a compact syntax. These embodiments signal per-tile_attribute values. The tile attributes may, for example, be in the form of a set of tile syntax elements (one syntax element per tile attribute), or for example in the form of a set of flags to enable or disable the usage of the tile attributes. These embodiments provide freedom for an encoder to assign the tile attribute values per tile, or per any subset of tiles in a picture, and the attribute values are signaled in a compact syntax at least once. A corresponding method and apparatus for decoding a picture is also described.

Abstract: A method for decoding a picture from a bitstream. The picture comprising a number of units, and the picture being partitioned into a number of spatial segments by a partition structure. The method includes decoding one or more code words in the bitstream; determining that the partition structure is uniform based on the one or more code words; determining the number of spatial segments based on the one or more code words; determining a segment unit size; and deriving the sizes and/or locations for spatial segments in the picture from the one or more code words. Deriving the sizes and/or locations for spatial segments in the picture comprises a first loop over the number of spatial segments in a first dimension or direction. A number of remaining segment units in the first dimension or direction to be segmented is calculated inside the first loop.

Abstract: The disclosure relates to an image sensor comprising pixels for acquiring color information from incoming visible light, wherein said image sensor comprising at least two pixels being partially covered by a color splitter structure comprising a first part and a second part, each of said first and second parts being adjacent to a dielectric part, each of said dielectric part having a first refractive index n1 (said first part having a second refractive index n2, and said second part having a third refractive index n3, wherein n1<n3<n2, and wherein according to a cross section, the first part of said color splitter structure has a first width W1, a height H and the second part of said color splitter structure has a second width W2, and the same height H, and wherein said color splitter structure has a first, a second and a third edges at the interfaces between parts having different refractive indexes, each edge generating beams or nanojets, and wherein said height H is close to a value Formul (I), where

Abstract: A method for decoding a picture from a bitstream. The method includes decoding a tile partition structure from one or more syntax elements in the bitstream. The method includes determining a number of tiles N in the picture. The method includes decoding a number of partitions in the picture, wherein each partition comprises an integer number of tiles. The method includes deriving a size and/or location for a current partition, wherein deriving the size and/or location for the current partition comprises: decoding one or more location syntax elements for the current partition from the bitstream, deriving a top-left position of the current partition as a location of a first tile in raster scan order that is not included in one or more previously derived partition, and deriving the size and/or the location of the current partition from a value of the one or more location syntax element together with a size and/or location of the one or more previously derived partition.

Abstract: A method for decoding a plurality of pictures from a bitstream is provided where the bitstream includes a first segment header and a second segment header. The method includes decoding a first picture from the bitstream using first parameter values decoded from the first segment header. The method includes decoding a second picture from the bitstream using second parameter values from the second segment header, wherein at least one second parameter value of the second parameter values from the second segment header is derived from a first parameter value of the first parameter values decoded from the first segment header.

Abstract: Providing backward compatibility in terms of a media bitstream and a media player conforming to different versions of a media bitstream syntax specification. In one embodiment, a bitstream is made backward compatible by including in the bitstream a first entry for a feature available in the media bitstream and second entry for an updated feature available in the media bitstream, where the first entry is understood both by a media player supporting a first version of a syntax specification and a media player supporting an updated version of the syntax specification, and the second entry is understood by the media player supporting the updated version of the syntax specification, but is not understood by the media player supporting the first version of the syntax specification.

Abstract: A method performed by a decoder for decoding a bitstream comprising a picture parameter set, PPS, and a first set of slices. The method includes obtaining the picture parameter set. The method also includes decoding a syntax element included in the picture parameter set to obtain an indicator value. The decoder is configured such that if the indicator value is set to a first value then the decoder determines that a picture header included in the bitstream comprises a parameter value corresponding to a particular parameter, otherwise the decoder determines that each slice included in the first set of slices comprises a parameter value corresponding to the particular parameter. If the picture header comprises the parameter value corresponding to the particular parameter, then this parameter value is used to decode slice data of each slice included in the first set of slices.

Abstract: A method for deriving a value for a first syntax element, Syntax_A. The method comprises determining whether Syntax_A is present in a bitstream. The method comprises, as a result of determining that Syntax_A is not present in the bitstream, deriving the value for Syntax_A to be equal to a first value, B, if a first condition is satisfied, or deriving the value for Syntax_A to be equal to a second value, C, if a second condition is satisfied.

Abstract: A diffraction grating includes a plurality of grating unit cells positioned in a periodic array on a substrate surface. In cross-section, a grating unit cell includes a homogeneous dielectric host medium with a first refractive index n1, embedding at least a first block of a first dielectric material with a second refractive index n2, a side edge of which is in direct contact with at least a second block of a second dielectric material with a third refractive index n3. Both the first block and the second block have a trapezoidal cross-section. The plurality of grating unit cells provides a non-symmetrical response for positive first diffraction order and negative first diffraction order based on nanojet hot spot positions, the nanojets being generated at edges between dielectric materials with different refractive indexes.

Abstract: Method for decoding a picture, comprising: decoding information that the picture is partitioned into more than one segment based on one or more syntax elements in a bitstream; decoding information that the spatial segmentation is uniform based on the one or more syntax elements; determining a segment unit size based on the one or more syntax elements or based on a predefined segment unit size; decoding a first value indicating a segment width from one or more code words in the bitstream; decoding a second value indicating a segment height from the one or more code words; deriving segment column widths based on a picture width in number of segment units and the first value; deriving segment row heights based on a picture height in number of segment units and the second value; deriving a spatial location for a current block based on the derived segment column widths and the derived segment heights; and decoding the current block based on the derived spatial location.

Abstract: A method and decoder is provided for decoding at least one current picture from a bitstream. An indicator value is decoded from the bitstream specifying at least one rule of a plurality of rules, the at least one rule applied to ordering of segments coded in the bitstream, wherein the segments are segments in a segment partition layout. A set of syntax elements from the bitstream specifying a segment partition layout is decoded. A segment partition layout based on the set of syntax elements is derived. The at least one current picture in the bitstream is decoded using the segment partition layout, wherein the ordering of the segments complies with the at least one rule specified. An encoder and corresponding method define the segment partition layout, selects the at least one rule from a set of rules, and encodes the segment partition layout and the indicator value into the bitstream.