Beijing Xiaomi Mobile Software Co., Ltd.

Xidian University

Mary-Luc Georges Henry Champel

Wei Zhang

Lei Yu

Sebastien Lasserre

The present disclosure provides a method and apparatus for obtaining a map of an Internet of things device. The method is applicable to a first device with a camera and being moveable, and includes: determining a map of an area; and transmitting the map to a control system for controlling one or more IoT devices.

Method and apparatus for obtaining map of internet of things device

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.

Method and apparatus of encoding/decoding point cloud geometry data captured by a spinning sensors head

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.

Method for encoding and decoding, encoder, and decoder

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.

Method for encoding and decoding a point cloud

A method for encoding and decoding, an encoder and decoder for a point cloud. The method for encoding a point cloud to generate a bitstream of compressed point cloud data, in which 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, includes: determining an occupancy pattern for a parent node based on the occupancy of its child nodes; determining a planar context information for at least one of the child nodes; and entropy encoding/decoding the occupancy pattern parent node based on the determined planar context information to produce encoded/decoded data for the bitstream.

Method and apparatus for processing a point cloud

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.

Method and apparatus with improved overlay design used in a virtual reality environment

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.

Method and device for transmitting viewpoint switching capabilities in a VR360 application

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 (S); and looping the current viewpoint according to the viewpoint looping information (S). A mechanism for allowing viewpoint looping is provided and information about the viewpoint looping is defined.

Growing community of inventors

Beijing, China

Mary-Luc Georges Henry Champel