Method, device and system for synchronizing audio/video signals

A method for measuring a delay value of a first rendering device using a measuring device, the method comprising the steps of:

• generating a first auxiliary signal and a second auxiliary signal, wherein said first auxiliary signal and said second auxiliary signal are pulse-shaped;
• transmitting said first auxiliary signal to said first rendering device via a first transmission path and said second auxiliary signal to a second rendering device via a second transmission path;
• outputting, to a user, a first audio/video output signal based on said first auxiliary signal, and a second audio/video output signal based on said second auxiliary signal;
• adjusting a delay of at least one of said first transmission path and said second transmission path by synchronizing said first audio/video output signal with said second audio/video output signal in accordance with the user's input;
• determining a delay of said first rendering device in terms of clock cycles of the measuring device by determining said delay of said second transmission path after said step of adjusting;
• acquiring time references from a time server;
• determining a frequency for the clock cycles based on the acquired time references;
• translating the determined delay of the first rendering device in terms of the clock cycles into the delay value based on the determined frequency;
• and
• outputting said delay value.