An electronic device is provided. The electronic device includes a wireless communication circuit, at least one processor, and a memory operatively coupled to the at least one processor. The electronic device may be configured to be connected to an external electronic device by using the wireless communication circuit, transmit audio data and video data for reproduction of multimedia in the external electronic device by using the wireless communication circuit, determine whether an input to the multimedia is detected, when the input to the multimedia is detected, transmit information instructing to stop synchronization between the audio data and the video data to the external electronic device.

Disclosed herein is a reception apparatus including: a reception block configured to receive broadcast content broadcast via a broadcasting network; an acquisition block configured to acquire inserted content that is inserted in the broadcast content during the reception thereof; an output block configured to output at least one of the broadcast content and the inserted content; a switch block configured to switch between the broadcast content and the inserted content outputted from the output block; and a buffer configured to sequentially store data of the received broadcast content when the broadcast content is switched to the inserted content; wherein, if the inserted content is switched to the broadcast content, the output block outputs the broadcast content from the buffer while the inserted content is outputted.

Concepts and technologies disclosed herein are directed to audio and video synchronization. According to one aspect disclosed herein, an audio-video (“AV”) synchronization system can simultaneously capture samples of a pre-encode media stream and a post-encode media stream. The pre-encode media stream can include AV content prior to being encoded. The post-encode media stream can include the AV content after being encoded. The AV synchronization system can align a pre-encode video component of the pre-encode media stream with a post-encode video component and can determine a video offset therebetween. The AV synchronization system can align a pre-encode audio component of the pre-encode media stream with a post-encode audio component of the post-encode media stream and can determine an audio offset therebetween. The AV synchronization system can then compare the video offset and the audio offset to determine if the post-encode media stream is synchronized with the pre-encode media stream.

Video playback method and control terminal thereof are provided. The invention receives video data stream, determines if a to-be-decoded frame meets a discard condition according to the time stamp of the to-be-decoded frame, if the discard condition is met, discards the non-reference frame to be decoded in the video data stream, and if the discard condition is not met, decodes the to-be-decoded frame into to-be-output frame; determines if the to-be-output frame meets the discard condition according to the time stamp of the to-be-output frame; if the discard condition is met, discards the to-be-output frame; if the discard condition is not met, outputs the to-be-output frame as output frame, such that the time intervals of the time stamps of the sequentially output frames according to the display order are equal.

Virtual Reality (VR) systems, apparatuses and methods of processing data are provided which include predicting, at a server, a user viewpoint of a next frame of video data based on received user feedback information sensed at a client, rendering a portion of the next frame using the prediction, encoding the portion, formatting the encoded portion into packets and transmitting the video data. At a client, the encoded and packetized A/V data is received and depacketized. The portion of video data and corresponding audio data is decoded and controlled to be displayed and aurally provided in synchronization. Latency may be minimized by utilizing handshaking between hardware components and/or software components such as a 3D server engine, one or more client processors, one or more client processors, a video encoder, a server NIC, a video decoder, a client NIC; and a 3D client engine.

A desktop application and supporting web site for capturing audio and video recordings or other digital content of differing modalities is introduced, wherein multiple participants in a collaborative session may be in separate remote locations. The application includes providing a high quality data format for transferring recordings, audiovisual data and the like to a remote network location or computer and a real-time data format for intercommunicating comments and instructions that are not recorded. Peer-to-peer and server-client implementations may be optimized regarding delivery time (latency) versus content quality. The desktop application also provides mechanisms for playing back sound, video or other data for participants' reference, along with synchronized presentations of textual, audio and visual material corresponding to the session.

Techniques are disclosed for measuring propagation delay of a media distribution system based on content output by rendering devices. An output from an output device of the media distribution system may be captured and a token may be detected from the captured content. A timecode may be derived from the detected token. The system's propagation delay may be determined from the derived timecode and may provide a basis to analyze system delays and other processing artifacts. In this manner, propagation artifacts may be estimated between multiple rendering devices that lack controls to synchronize their operation.

According to an embodiment, a packet generation apparatus includes: a converter configured to convert Temps Atomique International (TAI) time into an STC counter value; a sampling unit configured to obtain a PCR value by sampling the STC counter value converted by the converter in accordance with a first timing; a packet generator configured to generate a TS packet in which the PCR value obtained by the sampling unit is described, and to output the TS packet in accordance with a second timing; and a timing controller configured to determine the first timing and the second timing.

Embodiments of the disclosure provide a method and device for playing multimedia data synchronously. The method for playing multimedia data synchronously includes: synchronizing a clock of each multimedia playing device according to a data transmission delay of time of the multimedia playing device; receiving multimedia data including a timestamp; and calculating a playback instance of time of each frame of the multimedia data according to an instance of time of the synchronized clock, a target data transmission delay of time, a period of time for which each frame of the multimedia data is buffered in the multimedia playing device, and a play instance of time of each frame of the multimedia data indicated by the timestamp, and transmitting the multimedia data and the playback instance of time of each frame of the multimedia data to the plurality of multimedia playing devices.

One or more computing devices may be configured to identify information corresponding to a program change request associated with a multi-program data transmission. The information may comprise at least a link to a desired program within the multi-program data transmission. The one or more computing devices may communicate the link to the desired program to a client device over a specified time period. After the time period, the one or more computing devices may communicate the desired program to the client device using a single program data transmission. The single program data transmission may be derived from the multi-program data transmission.