Method and device for communicating data

摘要

A method for communicating data between a transmitter device and a receiver device comprises the following steps: - detecting a time event (i.e. synchronisation information, Critical Time Event, CTE, S401) by the transmitter device; - transmitting a first group of data S408 comprising the time event (synchronisation information) after a first interval of time S405 elapses from the time at which the time event (synchronization information) is detected; - receiving the first group of data by the receiver device; and - generating the time event (synchronisation information) by the receiver device after a second interval of time elapses from the time at which the first group of data is received, the value of the second interval of time being adapted such that the interval of time that elapses from the time at which the time event (synchronisation information) is detected by the transmitter device to the time at which the time event (synchronisation information) is generated by the receiver device is a predefined value. The arrangement described is used particularly for transmission of video data comprising synchronization information between a transmitter and receiver to counter variable latencies in the transmission such as those attributable to variable buffering (FIFO) delays at either side. The first interval of time comprises a first sub-interval depending on the time that is necessary to transmit a group of data preceding the first group and a second sub-interval depending on a synchronisation interval of the physical layer. The first interval of time is a predetermined interval of time corresponding to the sum of maximum possible values of the first and second sub-intervals. The first group of data or a subsequent group of data may comprise information indicating the first interval of time to the receiver.