Method and mechanism for synchronizing hardware and software modules

摘要

A method and system for synchronizing modules associated with audiovisual devices, generally for use with a digital non-linear editor. A logical clock communicates information, including time and state (clock operating mode) information, to hardware and software modules through a synchronization port. The synchronization ports convert the time information into values recognizable by the module, and offset the time as needed to maintain synchronization. The state information may effect module commands for controlling audiovisual devices, such as rewind, playback and capture commands to tape players, timed such that various devices having different preparatory timing requirements are synchronized. State information, such as information indicating that a device is ready, may be returned by the modules. Video editing features such as scrubbing, looping and frame-stepping are supported by the mode information that is communicated between the clock and the synchronization ports.