Abstract: Provided are a method and device for video coding, video decoding and storage medium. The video coding method includes: classifying video frames into independent frames and dependent frames, which comprise a first type of the dependent frames; generating region wise packing (RWP) coding configuration of each of the independent frames by coding parameters of the respective one of the independent frames, wherein the RWP coding configuration of the independent frames comprises the parameters to be unpacked to restore the video; and for each of the first type of the dependent frames, generating RWP coding configuration of the dependent frame by coding parameters of the dependent frame based on difference and dependency between the parameters of the dependent frame and the parameters of an independent frame used as a reference for the coding of the dependent frame.

Abstract: There is provided methods and apparatus of encoding/decoding a point cloud representing a physical object. Points of the point cloud are ordered based on azimuthal angles representing capture angles of sensors and sensor indices associated with sensors. The encoding method comprises encoding, into a bitstream, at least one order index difference representing a difference between order indices of two consecutive ordered points by: obtaining at least one binary data by binarizing the at least one order index difference; and for each binary data, selecting a context based on a distance between an azimuthal angle associated with the binary data and an azimuthal angle of an already encoded point, and context-based entropy coding the binary data in the bitstream, based on the selected context.

Abstract: An omnidirectional media playback method, a terminal device and a computer readable storage medium. The method comprises: obtaining viewpoint looping information associated to a current viewpoint from omnidirectional media data (S202); and looping the current viewpoint according to the viewpoint looping information (S204). A mechanism for allowing viewpoint looping is provided and information about the viewpoint looping is defined.

Abstract: A method for encoding and decoding, an encoder and decoder for a point cloud is disclosed. The method for encoding a point cloud to generate a bitstream of compressed point cloud data, the point cloud's geometry being represented by an octree-based structure with a plurality of nodes having parent-child relationships by recursively splitting a volumetric space containing the point cloud into sub-volumes each associated with a node of the octree-based structure, including: determining context information of a current node including plane position context information, the plane position context information of the current node being determined according to an occupancy of a neighboring node directly adjacent to the current node and an occupancy of at least one sibling node having the same parent node as the current node; and entropy encoding the occupancy information of the current node based on the determined context information to produce encoded data for the bitstream.

Abstract: There is provided methods and apparatus of encoding/decoding a point cloud representing a physical object. Points are captured by a spinning sensors head and are represented by sensor indices associated with sensors that captured the points, azimuthal angles representing capture angles of said sensors, and radius values of spherical coordinates of the point. Points are ordered based order indices obtained from the azimuthal angles and the sensor indices. Order index differences are encoded. An order index difference represents a difference between order indices associated with two consecutive ordered points. Optionally, the method encodes radius values, residual azimuthal angles associated with ordered points and residuals of three-dimensional cartesian coordinates of ordered points based on their three-dimensional cartesian coordinates, decoded azimuthal angles based on azimuthal angles, decoded radius values and sensor indices.

Abstract: Methods and devices are provided to encode and decode a data stream carrying data representative of a three-dimensional scene, the data stream comprising color pictures packed in a color image; depth pictures packed in a depth image; and a set of patch data items comprising de-projection data; data for retrieving a color picture in the color image and geometry data. These data are inserted in the video track of the stream with associated temporal information. The color and depth pictures that are repeated at least two times in a sequence of patches are not packed in the images but inserted in the image track of the stream and are pointed by color or geometry data.

Abstract: A method for encoding attributes of points of a point cloud, includes: determining a true transform coefficient by applying RAHT to attributes of a present node; determining a difference between attributes of a present parent node and each parent node of a first set of parent nodes sharing a face or an edge with the present node; selecting a second set of parent nodes from the first set of parent nodes according to the difference; determining a predicted value for the attributes of the present node according to attributes of the second set of parent nodes; determining a predicted transform coefficient by applying the RAHT to the predicted value of the attributes of the present node; determining a residual from the true transform coefficient and the predicted transform coefficient; and encoding the residual to produce encoded data of attributes of the point cloud for a bitstream.

Abstract: A method for positioning an internet of things (IoT) device with AR glasses is provided. The method includes: acquiring an indoor map; determining an AR-position of the AR glasses on the indoor map and a viewing direction of the AR glasses based on initial information of the AR glasses; receiving from the AR glasses tracking information concerning the IoT device to be positioned; and determining an IoT-position of the loT device to be positioned from the AR-position and the viewing direction in combination with the tracking information of the AR glasses.

Abstract: A method for encoding a point cloud to generate a bitstream of compressed point cloud data is provided. The point cloud’s geometry is represented by an octree-based structure with a plurality of nodes having parent-child relationships by recursively splitting a volumetric space containing the point cloud into sub-volumes each associated with a node of the octree-based structure. The method includes: determining a coding mode, wherein the coding mode includes a planar coding mode and an angular coding mode; obtaining coding context information for a present child node, entropy encoding the present child node based on the obtained coding context information to produce encoded data for the bitstream.

Abstract: The present disclosure provides a method and apparatus for obtaining a map of an Internet of things device.

Abstract: A method, a system and an apparatus are employed in a virtual reality (VR) environment. The method of building a virtual reality (VR) environment includes building the VR environment as formatted video content; defining at least one interactive overlay; and providing the at least one interactive overlay with a position information on a viewpoint of the VR environment.

Abstract: Provided are a method and device for video coding, video decoding and storage medium. The video coding method includes: classifying video frames into independent frames and dependent frames, which comprise a first type of the dependent frames; generating region wise packing (RWP) coding configuration of each of the independent frames by coding parameters of the respective one of the independent frames, wherein the RWP coding configuration of the independent frames comprises the parameters to be unpacked to restore the video; and for each of the first type of the dependent frames, generating RWP coding configuration of the dependent frame by coding parameters of the dependent frame based on difference and dependency between the parameters of the dependent frame and the parameters of an independent frame used as a reference for the coding of the dependent frame.

Abstract: An omnidirectional media playback method, a terminal device and a computer readable storage medium. The method comprises: obtaining viewpoint looping information associated to a current viewpoint from omnidirectional media data (S202); and looping the current viewpoint according to the viewpoint looping information (S204). A mechanism for allowing viewpoint looping is provided and information about the viewpoint looping is defined.

Abstract: Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.

Abstract: A method and a device for transmitting viewpoint switching capabilities in a Virtual Reality 360 (VR360) application are provided. The method for transmitting viewpoint switching capabilities in a VR360 application includes determining a configuration for switching between viewpoints in the VR360 application; and signaling the configuration to the VR360 application.

Abstract: Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.

Abstract: A method and device for encoding data representative of a 3D scene into a container and a corresponding method and device for decoding the encoded data are disclosed.

Abstract: Methods and devices are provided to encode and decode a data stream carrying data representative of a three-dimensional scene, the data stream comprising color pictures packed in a color image; depth pictures packed in a depth image; and a set of patch data items comprising de-projection data; data for retrieving a color picture in the color image and geometry data. These data are inserted in the video track of the stream with associated temporal information. The color and depth pictures that are repeated at least two times in a sequence of patches are not packed in the images but inserted in the image track of the stream and are pointed by color or geometry data.

Abstract: The invention concerns the exchange of parameters between communication devices of a network describing their respective data sessions and the application, at a communication device, of a bandwidth distribution algorithm using the exchange parameters to allocate bandwidth to one or more data sessions in the network.

Abstract: The present principles relates to a method and a device for encoding the colors of a point cloud wherein the method comprises: —assigning a specific number (LNk) per leaf node of an octree-based structure representing the geometry of the point cloud, a specific number (LNk) being assigned to a leaf node by assigning, recursively, an orientation ({?0, . . . , ?7}) (201) and a local number ({n0, . . . , n7}) (202) to each of eight child nodes of said octree-based structure according to an orientation (?p) previously assigned to a parent node and according to a specific child node numbering order; —ordering (200), the points of the point cloud by scanning the leaf nodes of the octree-based structure according to said assigned specific numbers; —assigning (210) colors of ordered points of the colored point cloud to pixels of an image according to a specific 2D path; and—encoding (220) the image. The present principles also relates to a method and device for decoding a point cloud.