Patent ID: 8558951
Filing Date: 2013-10-15
Classification: H04N

Abstract:
1. 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.