Improved method, system and apparatus for synchronizing signals

Details Improved method, system and apparatus for synchronizing signals Improved method, system and apparatus for synchronizing signals

H - Electricity

04

H

H04H 20/18 (2009.01) H04L 12/18 (2006.01) H04N 5/04 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2674013

A system as disclosed herein is suited for synchronizing unrelated information and/or reference signals originating from two or more broadcasting / multimedia equipment sources wherein the signals may be in different signal formats and/or subject to different delays at a receiving device. The system comprises a master reference time generator connected to at least one of a plurality of slave reference signal generators via a packet network. The master reference time generator comprises a master reference time counter and a sampling device for sampling the master reference time counter. The master reference time generator encodes time data in master reference time packets and feeds these packets into the packet network. The at least one of a plurality of slave reference signal generators is adapted to accept the encoded time data as an input in order to generate a reference signal, the phase of which is calculated based on the time elapsed since an initial time point. The slave reference signal generator comprises a slave reference time counter to generate time data elapsed from the initial time point. The slave reference time counter is connected to a sampling device for sampling the slave reference time counter. The master reference time counter and the slave reference time counter are sampled at time points derived from a time base synchronized on the master reference time generator and all of the slave reference signal generators of the network.

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