Abstract: Processing circuitry decodes, from a bitstream carrying a 3D mesh, coordinates of vertices in the 3D mesh. The 3D mesh represents a surface of an object with polygons, the polygons are defined by the vertices and an original connectivity having original edges connecting the vertices. The processing circuitry derives an inferred connectivity according to the coordinates of the vertices, the inferred connectivity has inferred edges connecting the vertices. The processing circuitry decodes, from the bitstream, connectivity differences. In an example, the connectivity differences are associated with a subset of the vertices. In another example, the connectivity differences are associated with one or more edges in the original edges and the inferred edges. The processing circuitry determines a recovered connectivity according to the inferred connectivity and the connectivity differences, and reconstructs the 3D mesh according to the recovered connectivity.

Abstract: A processing circuitry decodes a plurality of maps in 2D from a bitstream carrying a mesh frame. The mesh frame represents a surface of an object with polygons. The plurality of maps includes a decoded geometry map and a decoded attribute map with an adaptive 2D atlas sampling applied. The processing circuitry determines at least a first sampling rate and a second sampling rate according to syntaxes signaled in the bitstream. The first sampling rate is applied to a first region of the mesh frame and the second sampling rate is applied to a second region of the mesh frame during the adaptive 2D atlas sampling. The processing circuitry reconstructs, based on the plurality of maps, at least a first vertex of the mesh frame according to the first sampling rate, and a second vertex of the mesh frame according to the second sampling rate.

Abstract: In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry receives a data structure for a mesh frame with polygons representing a surface of an object. The data structure for the mesh frame includes a UV atlas that associates vertices of the mesh frame to UV coordinates in the UV atlas. The processing circuitry determines respective sampling rates for regions of the mesh frame according to respective characteristics of the regions of the mesh frame and applies, on the UV atlas, the respective sampling rates for the regions of the mesh frame to determine sampling positions on the UV atlas. The processing circuitry generates one or more sampled two dimensional (2D) maps for the mesh frame according to the sampling positions on the UV atlas, and encodes the one or more sampled 2D maps into a bitstream.

Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for representing a space of interest of an audio scene. One apparatus includes processing circuitry that decodes audio scene data for the audio scene. The audio scene data includes (i) audio content for a plurality of items representing the audio scene and (ii) a first syntax element indicating a type of a subset of the plurality of items. The subset of the plurality of items represents the space of interest of the audio scene. The processing circuitry determines a part of the audio content for the subset of the plurality of items based on the type of the subset of the plurality of items indicated in the first syntax element. The processing circuitry renders the determined part of the audio content.

Abstract: Media content data of an object is received. Whether a first parameter indicated by a first description of the object in an acoustic scene and a second parameter indicated by a second description of the object in a visual scene are inconsistent is determined. Based on the first parameter indicated by the first description of the object in the acoustic scene and the second parameter indicated by the second description of the object in the visual scene being inconsistent, one of the first description of the object in the acoustic scene and the second description of the object in the visual scene is modified based on another one of the first description and the second description that is not modified, wherein the modified one of the first description and the second description is consistent with the other one of the first description and the second description that is not modified.

Abstract: Aspects of the disclosure provide methods and apparatuses for mesh coding (e.g., compression and decompression). In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry decodes at least a first array and a second array from a bitstream carrying a three-dimensional (3D) mesh frame. The first array includes respective connectivity values of vertices in the 3D mesh frame according to a vertex traversal order that is consistent with the second array that includes coordinates of the vertices. The processing circuitry determines edges that connect the vertices based on at least the respective connectivity values of the vertices and the coordinates of the vertices, and reconstructs the 3D mesh frame based on at least the coordinates of the vertices and the edges.

Abstract: In a method of processing UV coordinates of a three-dimensional (3D) mesh, the UV coordinates of the 3D mesh are received. The UV coordinates are two-dimensional (2D) texture coordinates that include U coordinates in a first axis and V coordinates in a second axis, and are mapped with vertices of the 3D mesh. The UV coordinates of the 3D mesh are processed based on at least one of a quantization process, a separation process, and a transformation process. The quantization process is configured to convert the UV coordinates into a plurality of indicators. The separation process is configured to separate the UV coordinates into the U coordinates and the V coordinates respectively. The transformation process is configured to convert the UV coordinates from a spatial domain into a transform domain. Compression is performed on the processed UV coordinates after the processing of the UV coordinates.

Abstract: Polymer compositions comprising high structure filler materials and methods for preparing such compositions while retaining structure.

Abstract: Embodiments of this disclosure provide a radar-based posture recognition apparatus, method and an electronic device. The method includes: acquiring radar reflection point information based on radar echo signals reflected from a detected target, and clustering radar reflection points; in a first time period, calculating spatial morphological feature information and/or motion feature information of a target point set obtained by clustering; in a second time period, counting the spatial morphological feature information and/or the motion feature information of a plurality of first time periods to obtain motion process feature information in the second time period; and taking the motion process feature information within a second time period in which a current moment is present and the spatial morphological feature information and/or the motion feature information in a first time period in which the current moment is present as a feature set, to determine the posture of the detected target.

Abstract: Aspects of the disclosure provide methods and apparatuses for mesh coding (e.g., compression and decompression). In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry decodes a plurality of initial maps in two-dimension from a bitstream carrying a three-dimensional (3D) mesh frame. The processing circuitry determines at least two sampling rates associated with different portions of the plurality of initial maps and recovers from the plurality of initial maps and based on the at least two sampling rates associated with the different portions of the plurality of initial maps to obtain a plurality of recovered maps. A first portion of the plurality of initial maps is recovered based on a first sampling rate, and a second portion of the plurality of initial maps is recovered based on a second sampling rate. The processing circuitry reconstructs the 3D mesh frame based on the plurality of recovered maps.

Abstract: Aspects of the disclosure provide methods and apparatuses for mesh coding (e.g., compression and decompression). In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry decodes, using a decoder supporting a first bitdepth, a plurality of segmental attribute values having the first bitdepth from a bitstream carrying a mesh that represents a surface of an object. The plurality of segmental attribute values is associated with attribute values of the mesh, the attribute values of the mesh have a second bitdepth that is higher than the first bitdepth. The processing circuitry determines the attribute values of the mesh having the second bitdepth according to the plurality of segmental attribute values having the first bitdepth.

Abstract: Aspects of the disclosure provide methods and apparatuses for mesh coding (e.g., compression and decompression). In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry decodes an array of attributes from a bitstream carrying a three dimensional (3D) mesh frame that includes a plurality of patches. The array of attributes corresponds to vertices of the 3D mesh frame. The vertices of the 3D mesh frame are ordered into subsets respectively belonging to the plurality of patches. The processing circuitry determines a first portion of the array of attributes corresponding to a first subset of the vertices of the 3D mesh frame. The first subset belongs to a first patch in the plurality of patches. The processing circuitry determines first connectivity information of the first subset of the vertices, and reconstructs the first patch of the 3D mesh frame based on the first portion of the array of attributes and the first connectivity information.

Abstract: In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry receives a bitstream carrying encoded information of a mesh that is partitioned into patches. The bitstream includes a first portion and a second portion, the first portion includes patch information, the second portion includes patch boundary information that indicates at least a first edge of a first patch and a second edge of a second patch are a pair of edge mates. The processing circuitry decodes the first portion to obtain the patch information, and decodes the second portion to obtain the patch boundary information. The processing circuitry generates a reconstructed mesh based on the patch information and the patch boundary information, the first edge and the second edge are mapped into a same edge in the reconstructed mesh to connect the first patch with the second patch.

Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for loudness adjustment for an audio scene associated with an MPEG-I immersive audio stream. One apparatus includes processing circuitry that receives a first syntax element indicating a number of sound signals included in the audio scene. The processing circuitry determines whether one or more speech signals are included in the sound signals indicated by the first syntax element. The processing circuitry determines a reference speech signal from the one or more speech signals based on the one or more speech signals being included in the sound signals. The processing circuitry adjusts a loudness level of the reference speech signal of the audio scene based on an anchor speech signal. The processing circuitry adjusts loudness levels of the sound signals based on the adjusted loudness level of the reference speech signal.

Abstract: Aspects of the disclosure provide methods and apparatuses for audio processing. In some examples, an apparatus for media processing includes processing circuitry. The processing circuitry receives first six degrees of freedom (6 DoF) information associated with a media content for a scene in a media application. The first 6 DoF information includes a first spatial location and a first rotation orientation for rotation about a center at the first spatial location. The processing circuitry determines that a rendering platform for rendering the media content is a three degrees of freedom (3 DoF) platform; and calculates, a revolution orientation of the media content on a sphere centered other than the first spatial location, according to at least the first spatial location. The revolution orientation is 3 DoF information associated with the media content for rendering on the 3 DoF platform.

Abstract: Aspects of the disclosure provide methods and apparatuses for audio processing. In some examples, an apparatus for media processing includes processing circuitry. The processing circuitry receives first 3 degrees of freedom (3 DoF) information associated with a first media content for a scene in a media application. The first 3 DoF information includes a first revolution orientation for describing the first media content on a first sphere centered at a user of the media application. The processing circuitry determines that a rendering platform for rendering the first media content is a six degrees of freedom (6 DoF) platform, and calculates, first spatial location information of the first media content based on the first revolution orientation and first parameters of the first sphere. The first spatial location information is used in first 6 DoF information associated with the first media content for rendering the first media content on the 6 DoF platform.

Abstract: An optical track format of a holographic storage optical disc includes a lead-in area, a data area and a lead-out area. The data area is provided with data holographic positioning marks for marking reading/writing position of data holograms on the optical track and start positioning marks for marking position on the optical track where data holograms start to be recorded. The start positioning marks may also contain address encoding information. Such optical track can be encoded by performing binary encoding by length of the optical track between two consecutive notches, or performing binary encoding by high and low levels of a level signal.

Abstract: An optical system for holographic storage includes a reference light path, a signal light path, a servo light path and a reproduction light path. The reference light path and the signal light path contain a first Fourier lens and a second Fourier lens for transmitting reference light and signal light carrying data information, and adjusting the incident position and angle of the reference light and the signal light on a storage medium. The optical system includes a reference light objective lens for converging the reference light, a third Fourier lens for performing Fourier transformation on a signal light field, and a fourth Fourier lens for performing Fourier transformation on a reproduced signal light field to read the data information. The first Fourier lens, the second Fourier lens, the third Fourier lens, the fourth Fourier lens and the reference light objective lens is respectively a Fresnel lens or a meta lens.

Abstract: Method, apparatus, and system for sampling-based dynamic mesh compression are provided. The process may include determining one or more sample positions associated with an input mesh based on one or more sampling rates, and an occupancy status associated respectively with each of the one or more sample positions indicating whether each of the one or more sample positions is within boundaries of one or more polygons defined by the input mesh is determined. The process may include generating a sample-based occupancy map based on the occupancy status associated respectively with each of the one or more sample positions.

Abstract: Aspects of the disclosure provide methods and apparatuses for audio processing. In some examples, an apparatus for media processing includes processing circuitry. The processing circuitry receive audio inputs associated with a layered description for a space of interest in an audio scene. The space of interest includes a plurality of subspaces. The layered description includes a first layer and a second layer. The first layer has a common node with a first value that is a common attribute value of two or more subspaces in the plurality of subspaces. The second layer has individual nodes respectively associated with each of the plurality of subspaces. The processing circuitry determines the plurality of subspaces of the space of interest based on the layered description, and renders an audio output based on the audio inputs in response to a location of a subject of the audio scene being in the space of interest.