A method and apparatus for measuring and/or correcting audio/visual synchronization is disclosed. In one embodiment, a method for providing synchronization of a video signal and a corresponding audio signal associated with the audio/visual transmission includes detecting a triggering video event in the video signal and inserting a synchronization signal into the audio signal, where the synchronization signal is correlated to the triggering video event. In another embodiment, a method for measuring and optionally correcting the synchronization of the video signal and the audio signal includes detecting the triggering video event in the video signal, detecting the synchronization signal in the audio signal, and assessing the synchronization of the video signal and the audio signal in accordance with a time offset between the triggering video event and the synchronization signal. Implemented in conjunction, these two embodiments provide a method and apparatus for both measuring and correcting the end-to-end synchronization of an audio-video system.