Abstract: A method performed by encoder comprises partitioning a mesh into a first side and a second side; determining, for a first vertex located on the first side, whether a first perpendicular line extending from the first vertex intersects with two or more surfaces of the mesh on the second side, each intersection of the first perpendicular line corresponding to an intersected vertex on the second side; based on the determination the first perpendicular line intersects with two or more surfaces of the mesh on the second side, selecting one of the intersected vertices on the second side as a second vertex corresponding to the first vertex based on a shortest distance between each intersected vertex and a predicted vertex on the second side that is symmetric to the first vertex; and generating a new connection in the mesh.

Abstract: A method of mesh processing includes receiving coded information of a mesh, the coded information including position connectivity of a plurality of 3D vertices of a mesh in a 3D space, and a correspondence of the plurality of 3D vertices to UV vertices in a UV space for the mesh; determining UV connectivity of the UV vertices; determining, based on the coded information, a first initial UV vertex in a first UV chart in the plurality of UV charts; determining first UV vertices in the first UV chart according to a traversing order of 3D vertices corresponding to the first UV vertices in the first UV chart, the traversing order starting from the first initial UV vertex and traversing each UV vertex in the first UV chart; decoding, from the coded information, prediction residuals of the first UV vertices; and determining first UV coordinates of the first UV vertices accordingly.

Abstract: A method of mesh processing includes receiving coded information of a mesh, the coded information includes position connectivity of a plurality of 3D vertices of a mesh in a 3D space, and a correspondence of the plurality of 3D vertices to UV vertices in a UV space for the mesh. The method further includes generating a reconstructed mesh in the 3D space by the plurality of 3D vertices according to the position connectivity, and determining seam vertices from the plurality of 3D vertices. The method also includes performing a prediction of seam edges in the 3D space based on at least the seam vertices, at least an edge between two seam vertices is predicted to be a seam edge. The method can also include cutting the reconstructed mesh into patch components according to the seam edges and determining UV connectivity of the UV vertices according to the patch components.

Abstract: In some examples, processing circuitry receives at least a first mesh frame associated with a first time instance and a second mesh frame associated with a second time instance. The first mesh frame includes a first two dimension (2D) map with first patches having three-dimension (3D) information mapped to 2D. The second mesh frame includes a second 2D map with second patches having 3D information mapped to 2D. The processing circuitry identifies that a first patch in the first patches is a reference matching patch for a second patch in the second patches. Further, the processing circuitry determines first re-map transform parameters for a temporal alignment of the second patch to the first patch, and generates a new second 2D map that includes a transformed second patch that is transformed from the second patch according to the first re-map transform parameters.

Abstract: A method performed includes encoding a first vertex, a second vertex, and a third vertex of a first face of a polygon mesh; determining a set of adaptive weights that comprise a first weight, a second weight, and a third weight; and performing parallelogram prediction to predict a fourth vertex in a second face of the polygon mesh by applying the first weight to the first vertex, the second weight to the second vertex, and the third weigh to the third vertex, in which the first weight is less than 0.8 and greater than 0, in which the second weight is greater than ?0.8 and less than 0, and in which the third weight is less than 0.9 and greater than 0.

Abstract: A method and apparatus comprising computer code for mesh attribute coding using a dual degree encoder or decoder configured to cause a processor or processors to receive at least two sub-meshes and determine a pair of vertices with a minimum cost for prediction, wherein a first vertex of the pair of vertices is a part of the first sub-mesh, wherein a second vertex of the pair of vertices is a part of the second sub-mesh. The method may cause a processor or processors to set the first vertex of the pair of vertices as a predictor vertex to the second sub-mesh to be encoded. The method may cause a processor or processors to encode the second sub-mesh in a first encoding order, wherein the second vertex of the pair of vertices is encoded first in the second sub-mesh.

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain, from a bitstream, a mesh representing an encoded volumetric data of at least one three-dimensional (3D) visual content; partition a plurality of vertices of the mesh into a plurality of groups; and decode the encoded volumetric data by predicting the vertices in each group of the plurality of groups based on a plurality of traversal orders depending on an adaptive reference vertex of the vertices, and the plurality of traversal orders includes a first order from the adaptive reference vertex to a first alternative reference vertex of the vertices, and wherein the plurality of traversal orders includes a second order from the adaptive reference vertices to a second alternative reference vertex of the vertices.

Abstract: An exemplary telephone apparatus which can transfer a first phone call from a Bluetooth enabled cellular phone to a home phone and, making a second cellular phone call by a home phone via a Bluetooth enabled cellular phone, includes a Bluetooth enabled integrated chip (IC). The IC includes a Bluetooth modem configured for receiving a Bluetooth signal from a Bluetooth radio frequency (RF) antenna of the cellular phone, a central processing unit (CPU) built-in the IC, for switching controlling of transferring between the first phone call and the second phone call, and a digital signal processor (DSP) and a CODEC built-in the IC. The telephone apparatus makes use of digital signal processing technology to generate and decode various tones and signals. The telephone also avoids the problem of distortion of DTMF tone during transmission through a Bluetooth RF.

Abstract: An antibacterial agent including a photocatalytic antibacterial material. The photocatalytic antibacterial material includes a rare-earth element modified tetrapod-shaped zinc oxide whisker (T-ZnOw). A method for preparation of the antibacterial agent is also provided, and includes: 1) adding a tetrapod-shaped zinc oxide whisker and a dispersant into a dispersion medium, and dispersing to yield a tetrapod-shaped zinc oxide whisker dispersion system; and 2) adding a rare-earth element to the dispersion system under ultrasound conditions, stirring, performing ultrasonic vibration, filtering, washing, drying, and baking, to yield the antibacterial agent.

Abstract: An exemplary telephone apparatus which can transfer a first phone call from a Bluetooth enabled cellular phone to a home phone and, making a second cellular phone call by a home phone via a Bluetooth enabled cellular phone, includes a Bluetooth enabled integrated chip (IC). The IC includes a Bluetooth modem configured for receiving a Bluetooth signal from a Bluetooth radio frequency (RF) antenna of the cellular phone, a central processing unit (CPU) built-in the IC, for switching controlling of transferring between the first phone call and the second phone call, and a digital signal processor (DSP) and a CODEC built-in the IC. The telephone apparatus makes use of digital signal processing technology to generate and decode various tones and signals. The telephone also avoids the problem of distortion of DTMF tone during transmission through a Bluetooth RF.