The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe (DP) data, Low-Density Parity-Check (LDPC) encoding the DP data according to a code rate, bit interleaving the LDPC encoded DP data, mapping the bit interleaved DP data onto constellations, building at least one signal frame including the mapped DP data, and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method and transmitting the broadcast signals having the modulated data, wherein the input streams include Audio/Video (A/V) data and service guide data, and wherein the Audio/Video (A/V) data and service guide data are included in first ISO base media file format (ISOBMFF) files.

The disclosure discloses a live broadcast delaying method and apparatus, the method including: receiving live streaming media transmitted on the spot; segmenting the live streaming media into segmented files at a preset length of time; if a live broadcast delay instruction is received, then obtaining a delay period of time indicated by the live broadcast delay instruction; calculating a play start point of time from the current system time and the delay period of time; searching for one of the segmented files corresponding to the play start point of time, and downloading the segmented file searched to a cloud encoder; encoding the segmented file downloaded in the cloud encoder into delayed live streaming media; and transmitting the delayed live streaming media to a streaming media server, so that the live broadcast can be delayed without any additional costly delay device to thereby lower a cost of delaying the live broadcast.

There is provided a video playback system comprising a plurality of video playback channels, a memory, and a processor configured to transmit a first video content over a first playback channel, store a first video transmission being transmitted over the first video playback channel in the memory, start transmitting, at a second time, the first video transmission from the memory over a second playback channel, receive an update segment for replacing a first segment of the first video transmission and a location of the first segment in the first video transmission, detect the location of the first segment in the first video transmission, transmit the update segment in place of the first segment over the second video playback channel, revert to transmitting the first video transmission over the second video playback channel, and store a second video transmission being transmitted over the second video playback channel in the memory.

An apparatus for facilitating reception of multiple representations of a video signal. In one embodiment, the apparatus includes a mechanism for receiving plural representations of the video signal corresponding to plural decimated versions of the video signal, associating pictures of the received plural representations of the video signal, and outputting pictures corresponding to information from associated pictures in accordance with a relative temporal order.

The present invention relates to a multicast-based content transmitting system and method, and a device and method for estimating high-speed movement. Included are: a content providing device for generating N×M multicast stream channels having different transmission start times and transmission rates, providing N×M multicast stream channel lists, and transmitting content through one channel of N×M multicast stream channels; and a user terminal for selecting one channel of the N×M multicast stream channel lists provided from the content providing device and receiving content through the selected multicast stream channel.

A multi-video stream transmission method and a device, where an access point sets an initial sending time and a sending period of an intra frame (I frame) of each station (STA) associated with the access point, and allocates an I frame service period and a predictive frame (P frame) service period to each STA according to the initial sending time and the sending period of the I frame of each STA, where each STA exclusively occupies a channel in the I frame service period and the P frame service period such that I frame sending time of STAs are staggered, network load balance is achieved, and it is ensured that a latency of each STA meets a quality of service (QoS) requirement.

A system and method for operating includes providing a content for communication through a content distribution system having a broadcast mode and a unicast mode, determining a first number of user devices for receiving a communication of the content, determining a likelihood of consumption of the content by the first number of user devices, determining an available spectrum for communicating the content, determining a spectral efficiency for the unicast mode and the broadcast mode of the communication for each of the first number of user devices, selecting the broadcast mode or the unicast mode or both based on the first number of user devices, the likelihood of consumption of the content, the available spectrum and the spectral efficiency and communicating the content to the first number of user devices using the broadcast mode, the unicast mode or both based on selecting.

The following describes techniques to maintain continuity of a live media stream. A media stream includes a first distribution layer with a first set of key frames and a set of delta frames succeeding key frames in the first set of key frames. The media stream also includes a second distribution layer including a second set of key frames, where the second set of key frames contains fewer key frames than the first set of key frames. Using the first and second distribution layers, a client device may subscribe to the media stream with a minimized start-up time and optimized quality of experience among varying complexity of the media content and dynamic network conditions.

Aspects of the subject disclosure may include, for example, a method comprising determining whether a skippable advertisement is being streamed preceding a requested video; responsive to determining that the skippable advertisement is being streamed, initiating a skippable advertisement procedure, wherein the skippable advertisement procedure comprises streaming a first portion of the skippable advertisement without imposing constraints and streaming a second portion of the skippable advertisement imposing constraints; responsive to receiving a request to skip the skippable advertisement, ceasing the streaming the second portion of the skippable advertisement and initiating streaming of the requested video without imposing constraints. Other embodiments are disclosed.

The present invention relates to a method for managing data output from multiple cameras of a remote tower via a common transmission media to a central entity, non-transitory computer-readable storage medium, and a corresponding remote tower system. The method comprises determining a global GOP sequence for the multiple cameras, determining a first distribution of I-frames within the global GOP sequence and forming a second distribution of I-frames within that global GOP sequence by moving the I-frame of at least one camera. The proposed method allows for transmitting data from a remote virtual tower to a control centre with reduced data peaks whereby the data can be transmitted without additional buffering and the end-to-end transmission delays can be kept at low level.