AUTOMATIC COMPENSATION OF A DELAY OF A SYNCHRONIZATION SIGNAL IN A PACKET SWITCHING NETWORK

摘要

The present invention relates to a sending device able to send packets in a network comprising at least two stations, the said device comprising means for extracting image pips on the basis of a synchronization signal, initializing an image counter on the basis of the image pips, initializing a counter CPT_PCR every "m" zero-crossings of the image counter, the counter CPT_PCR being regulated by a clock produced by the image counter, sampling the counter CPT_PCR every period Tsm, where Tsm emanates from a time base synchronized on all the stations of the said network; and sending packets containing the samples PCRe of the counter CPT_PCR in the network. According to the invention, it comprises means for receiving packets containing samples PCR-IoC1 sent by a station of the network as echo to the samples PCRe and when samples PCR-IoC1 are received for: - evaluating a duration of propagation of samples over an outward-return trip between the said device and the said station; - determining a phase shift value ?f on the basis of the duration of propagation; - sending the phase shift value ?f in the network.