Patent ID: 7949890
Filing Date: 2011-05-24
Classification: G06F,H04J,H04N

Abstract:
1. A method for clock synchronization by calculating a correction value to be added or subtracted from a local time calculated comprising: defining a first computer A's time as an absolute time T assigning a current best approximation of a network round trip time between computers A and N to RTT setting initial values of registers t exchanging synchronization packets periodically; computer N computing t computer N writing t computer N sending an audio packet to computer A; computer A receiving the audio packet; computer A computing t computer A setting t computer A calculating t′ computer A sending an audio packet to computer N; computer N receiving the audio packet; computer N computing t computer N computing RTT=t computer N assigning RTT computer N assigning the value of minimum(RTT assigning a mean value of (t′ synchronizing clock by adding a correction value ΔT