Abstract: A system for generating and synchronously executing a multiplayer scenario, in one of a virtual, mixed and augmented reality environment and having a visual programming module allowing generation and management of at least one of an asset of a scenario and a visual acyclic relation action graph defined by a plurality of nodes and a network module configured to connect a plurality of clients over a network for synchronized execution of the nodes of the acyclic relation action graph. The network module operates using a network protocol including an identity component including a unique asset identifier and an asset container for each asset of the scenario and being replicable on the plurality of clients; and a node component defining a unique node identifier and a node container for each node of the visual acyclic relation action graph and being replicable on the plurality of clients.

Abstract: A guest digital device joins a playback session hosted by a host digital device and synchronizes playback of digital media content with playback on the host digital device. This enables multiple users to listen to or view media at the same time on their respective devices. A time-based synchronization process may be used to initially synchronize playback of the guest digital device to the host digital device. If synchronization is lost, the device may record and analyze audio during playback and a fingerprint-based synchronization approach may be applied that detects a time offset between fingerprints in the analyzed audio. If synchronization is still not achieved, a watermark-based synchronization approach may be applied in which watermarks are actively injected into the audio and the time offsets between the watermarks is detected.

Abstract: A guest digital device joins a playback session hosted by a host digital device and synchronizes playback of digital media content with playback on the host digital device. This enables multiple users to listen to or view media at the same time on their respective devices. A time-based synchronization process may be used to initially synchronize playback of the guest digital device to the host digital device. If synchronization is lost, the device may record and analyze audio during playback and a fingerprint-based synchronization approach may be applied that detects a time offset between fingerprints in the analyzed audio. If synchronization is still not achieved, a watermark-based synchronization approach may be applied in which watermarks are actively injected into the audio and the time offsets between the watermarks is detected.