The present technology relates to a transmission device, a reception device, a transmission system, and a transmission method capable of improving transmission efficiency of subdata added to main data. A transmission device includes a frame sequence number setting unit that, on the basis of a frame number indicating an order of a subframe in a main frame, assigns to the subframe a frame sequence number indicating an order of the subframe in a frame sequence including a plurality of the subframes, and a multiplexing unit that arranges a data packet at a predetermined position in the subframe on the basis of the frame sequence number. The present technology can be applied to a CCU, for example.

There is described a method for determining a play duration estimate of an adaptive bit rate (ABR) media presentation. The method comprises receiving at a network entity a media playlist manifest file of the media presentation, wherein the manifest file is transmitted from a content server to a client and comprises a plurality of entries, each entry linking to a respective different one of a plurality of media segments of the media presentation. The method further comprises determining a data size of the manifest file; and determining a play duration estimate of the media presentation based on the determined data size of the manifest file, a first value that represents a data size of each of the plurality of entries in the manifest file and a second value that represents a play duration of each media segment of the plurality of media segments of the media presentation.

A video optimizer receives a request to optimize a source file and stream the optimized file. The request may be accompanied by a key uniquely identifying the original source file to be optimized and an optimized version of the source file to stream to the client. The key uniquely identifies the source video file as it exists on an origin server to prevent transmission of modified source video and the optimized version of the source file by optimization parameters to ensure compatibility with the user device. The video optimizer queries a cache database in response to the received request, which contains references keys and locations of optimized source files among local caches in a cluster of video optimizers. The cache database responds indicates whether a matching optimized version of the source file exists in a local cache of a given video optimizer in the cluster.

A method of processing media content in Moving Picture Experts Group (MPEG) Network Based Media Processing (NBMP) includes obtaining a plurality of tasks for processing the media content, providing an interface between an NBMP workflow manager and a cloud manager by providing an NBMP Link application program interface (API), which links the plurality of tasks together, identifying an amount of network resources to be used for processing the media content, by using the NBMP Link API, and processing the media content in accordance with the identified amount of network resources.

A system (100) for context driven processing of multimedia content (402) on an edge device (104) is presented. The system (100) includes an acquisition subsystem (404). Furthermore, the system (100) includes a processing subsystem (406) that includes a context aware artificial intelligence platform (408) configured to generate context characteristics based on user characteristics, edge device characteristics, and multimedia characteristics, retrieve a model (324, 412) based on the context characteristics, identify processing steps based on the model (324, 412), the context characteristics, or both, where the processing steps are used to perform context driven processing of input multimedia content (402) on the edge device (104), select, based on the model (324, 412), the context characteristics, or both, one or more target processing units (100) to perform the processing steps, and execute the processing steps on the selected target processing units (418, 420, 422, 424, 426) to generate improved output multimedia content. The system (100) includes an interface unit (428, 430) configured to provide, on the edge device (104), the improved output multimedia content.

A system and method are provided for determining delay of a plurality of media streams. The system and method involve generating, at a source processor, a series of source time packets; transmitting, at the source processor, through a network, the series of source time packets as a source packet stream; generating, at a destination processor, a series of destination time packets; receiving, at the destination processor, through the network, the source packet stream; determining, at the destination processor, a transmission time for the source packet stream based on the source time data and the destination time data; and determining, at the destination processor, a relative synchronization error based on the source signature data and the destination signature data. Each source time packet includes source time data and source signature data. Each destination time packet includes destination time data and destination signature data.

An electronic device receives a request, from a first device of a host user, to initiate a first shared playback session for the first device and one or more additional devices. The electronic device streams media content from a first playback queue to the first device and to the one or more additional devices, the first playback queue including one or more media content items corresponding to the first shared playback session. The electronic device determines that the first device of the host user has left the first shared playback session and, in response, maintains the first playback queue to be accessed by the one or more additional devices. After the host user has left the first shared playback session, the electronic device provides one or more media content items from the first playback queue to at least one of the one or more additional devices.

An apparatus and method for transmitting and receiving information related to multimedia data in a hybrid network and a structure thereof are provided. The transmission method includes generating transmission characteristic information about the media data, and transmitting the transmission characteristic information. The transmission characteristic information includes valid range information about the transmission characteristic information.

A point cloud data encoding method is provided, which includes: acquiring initial point cloud data in a point cloud data processing environment; determining a space grid structure corresponding to the initial point cloud data; determining a filling order of different point cloud points in the initial point cloud data in the space grid structure; determining, based on the filling order of different point cloud points in the initial point cloud data in the space grid structure, residual information matched with the initial point cloud data; and encoding, according to the residual information, the initial point cloud data to obtain target point cloud data. A point cloud data decoding method, a point cloud data processing method, apparatuses, an electronic device, a computer program product, and a computer-readable storage medium are also provided.

Methods and systems of narrowcasting to a service group having one or more one-way set top boxes are shown and disclosed. The method may include receiving encrypted single program transport streams (SPTSs) from an encryptor, and receiving one or more session control signals for the SPTSs from a switched digital video (SDV) control system. The method may additionally include receiving service information (SI) packet identifiers (PIDs) for the SPTSs from a conditional access (CA) system, and updating the SI PIDs based on the one or more session control signals. The method may further include converting the SPTSs to narrowcast multiprogram transport streams (MPTSs) based on the one or more session control signals, and transmitting the narrowcast MPTSs and the updated SI PIDs to a plurality of edge quadrature amplitude modulation (QAM) devices.