Abstract: Provided are a method and apparatus for processing immersive media data, a storage medium, and an electronic apparatus. The method comprises: acquiring immersive media data corresponding to a current viewing posture of a user, wherein a three-dimensional viewing space is used to limit viewing content of the user; and rendering the immersive media data corresponding to the current viewing posture, wherein when the current viewing posture is within the three-dimensional viewing space, the acquired immersive media data is rendered; or when the current viewing posture has moved or is moving outside the three-dimensional viewing space, the immersive media data is rendered according to handling information of the three-dimensional viewing space.

Abstract: A data processing method, apparatus and device, a storage medium, and a program product are disclosed. The method may include: acquiring free-viewpoint video data, the free-viewpoint video data comprises at least one texture map and/or at least one depth map; encapsulating the at least one texture map and/or the at least one depth map in at least one media track; and processing the free-viewpoint video data according to target-viewpoint information.

Abstract: Embodiments of the present disclosure provide a video bitstream encapsulation method and apparatus, a video bitstream decoding method and apparatus, and a video bitstream access method and apparatus. The video bitstream encapsulation method includes: encapsulating information of a Library Random Access Point (LRAP) sample in a first video bitstream into a media container file in which the first video bitstream is encapsulated; and encapsulating information of a library picture sample of the LRAP sample into the media container file, wherein the library picture sample is a reference picture sample of the LRAP sample. The solution may solve the problems in the related art that a video encoding manner using a library picture as a reference picture cannot allow for efficient accessing and processing of a video bitstream containing a reference picture sample and the processing is complex.

Abstract: Methods, systems, and apparatus for processing of three-dimensional visual content are described. One example method of processing three-dimensional content includes parsing a level of detail (LoD) information of a bitstream containing three-dimensional (3D) content that is represented as one geometry sub-bitstream and one or more attribute sub-bitstreams; and generating, based on the LoD information, decoded information by decoding at least a portion of the geometry sub-bitstream and the one or more attribute sub-bitstreams corresponding to a desired level of detail; and reconstructing, using the decoded information, a three-dimensional scene corresponding at least to the desired level of detail. The bitstream conforms to a format organized according to multiple levels of details of the 3D content.

Abstract: A loop filtering method, a video encoding method, a video decoding method, an electronic device, and a medium are provided. The loop filtering method includes: acquiring a first reconstructed video unit processed by a loop filter; performing pixel classification on the first reconstructed video unit; determining a scale factor corresponding to each class; and performing scale adjustment on the first reconstructed video unit according to the scale factor, so as to obtain a second reconstructed video unit.

Abstract: Provided are a method and apparatus for processing volumetric media, a storage medium, and an electronic apparatus. The method includes: identifying a V3C track and a V3C component track from a container file of a V3C bitstream of the volumetric media; obtaining one or more atlas coding sub-bitstreams by decapsulating the V3C track, and obtaining one or more video coding sub-bitstreams that correspond to the one or more atlas coding sub-bitstreams by decapsulating the V3C component track; and generating V3C data of a 3D spatial region of the volumetric media based on the one or more atlas coding sub-bitstreams and the one or more video coding sub-bitstreams.

Abstract: Methods and apparatus for processing of volumetric visual data are described. One example method includes decoding, by a decoder, a bitstream containing volumetric visual information for a 3-dimensional scene that is represented as one or more atlas sub-bitstreams and one or more encoded video sub-bitstreams, reconstructing, using a result of decoding the one or more atlas sub-bitstreams and a result of decoding the one or more encoded video sub-bitstreams, the 3-dimensional scene, and rendering a target view of the 3-dimensional scene based on a desired viewing position and/or a desired viewing orientation.

Abstract: Embodiments of the present disclosure provide a method and an apparatus for video processing, and a storage medium and an electronic apparatus. The method comprises: determining a neural network loop filtering enabled flag of a reconstructed video unit; setting, based on the neural network loop filtering enabled flag, an adaptive loop filtering enabled flag for the reconstructed video unit; and signaling at least one type of the following information: filter information related to neural network loop filter of the reconstructed video unit, and filter information related to adaptive loop filter of the reconstructed video unit.

Abstract: Methods, systems and apparatus for processing of volumetric media data are described. One example method of volumetric media determining, from a media presentation description (MPD) file, one or more preselection elements corresponding to a preselection of a volumetric media, accessing, using the one or more preselection elements, one or more atlas data components and associated video-encoded components of the volumetric media; and reconstructing the volumetric media from the one or more atlas data components and the associated video-encoded components.

Abstract: Provided are a three-dimensional point cloud data processing method and apparatus, a storage medium, and an electronic apparatus. The method includes: identifying, from a container file of a geometrically encoded point cloud bit stream of an original point cloud, one geometrically encoded point cloud tile base track and one or more geometrically encoded point cloud tile tracks, wherein the one geometrically encoded point cloud tile base track and one or more geometrically encoded point cloud tile tracks correspond to one or more three-dimensional spatial regions of the original point cloud; decoding geometrically encoded point cloud compression data encapsulated in the one or more geometrically encoded point cloud tile tracks, wherein the geometrically encoded point cloud compression data corresponds to partial regions of the one or more three-dimensional spatial regions; and rendering a point cloud in the partial three-dimensional spatial regions according to the decoded point cloud data.

Abstract: A media resource playing method and apparatus, a text rendering method and apparatus, a device, and a non-transitory computer-readable storage medium are disclosed. The method may include: determining, based on a first box type or a first sample group type, a region of interest in an omnidirectional video and at least one media resource correlated with the region of interest; and plying the at least one media resource correlated with the region of interest.

Abstract: Provided are a point cloud data processing method and device, a storage medium and an electronic device. The method includes that: static geometry encoding point cloud data containing region information of a 3D scene is determined, the static geometry encoding point cloud data being represented by G-PCC item data; partial item data corresponding to partial region of the 3D scene in the static geometry encoding point cloud data is decoded; and the partial region of the 3D scene is rendered based on the decoded data. Part of required item data is determined according to user needs, so that the part of required item data can be obtained without traversing the complete point cloud data, which improves the decoding efficiency, shortens the decoding time, and shortens the rendering waiting time of users.

Abstract: Provided are a method and apparatus for processing immersive media data, a storage medium, and an electronic apparatus. The method comprises: acquiring immersive media data corresponding to a current viewing posture of a user, wherein a three-dimensional viewing space is used to limit viewing content of the user; and rendering the immersive media data corresponding to the current viewing posture, wherein when the current viewing posture is within the three-dimensional viewing space, the acquired immersive media data is rendered; or when the current viewing posture has moved or is moving outside the three-dimensional viewing space, the immersive media data is rendered according to handling information of the three-dimensional viewing space.

Abstract: A MSS chunking method for an MP4 file, an MSS adapter, and a non-transitory computer-readable storage medium are disclosed. The method may include: receiving an MSS download request for downloading of at least one MSS chunk of a first MP4 file; determining, according to MSS chunk indexes and virtual chunk indexes of the first MP4 file, data segments in the first MP4 file corresponding to data of the at least one MSS chunk, each MSS chunk index containing a playing address of a respective MSS chunk of the first MP4 file, and each virtual chunk index containing a correspondence between the data of a respective MSS chunk and a respective one of data segments of the first MP4 file; sending a data segment download request to a media server and receiving data segments; and assembling contents of the data segments to generate the at least one MSS chunk.

Abstract: Methods, systems, and apparatus for processing of three-dimensional visual content are described. One example method of processing three-dimensional content includes parsing a level of detail (LoD) information of a bitstream containing three-dimensional (3D) content that is represented as one geometry sub-bitstream and one or more attribute sub-bitstreams; and generating, based on the LoD information, decoded information by decoding at least a portion of the geometry sub-bitstream and the one or more attribute sub-bitstreams corresponding to a desired level of detail; and reconstructing, using the decoded information, a three-dimensional scene corresponding at least to the desired level of detail. The bitstream conforms to a format organized according to multiple levels of details of the 3D content.

Abstract: The present disclosure provides a media resource playing and text rendering method, apparatus and device and a storage medium. The method comprises: determining, on the basis of a first data box type or a first group type, a region of interest of an omnidirectional video and at least one media resource associated with the region of interest; and playing at least one media resource associated with the region of interest.

Abstract: Methods, systems and apparatus for processing of volumetric media data are described. One example method of volumetric media determining, from a media presentation description (MPD) file, one or more preselection elements corresponding to a preselection of a volumetric media, accessing, using the one or more preselection elements, one or more atlas data components and associated video-encoded components of the volumetric media; and reconstructing the volumetric media from the one or more atlas data components and the associated video-encoded components.

Abstract: Methods and apparatus for processing of volumetric visual data are described. One example method includes decoding, by a decoder, a bitstream containing volumetric visual information for a 3-dimensional scene that is represented as one or more atlas sub-bitstreams and one or more encoded video sub-bitstreams, reconstructing, using a result of decoding the one or more atlas sub-bitstreams and a result of decoding the one or more encoded video sub-bitstreams, the 3-dimensional scene, and rendering a target view of the 3-dimensional scene based on a desired viewing position and/or a desired viewing orientation.