Method and apparatus for distributed synchronization signal

摘要

A method and apparatus is described for distributing a synchronization signal for deriving sample rate clocks in data transmitted between nodes in a system such as an IEEE 1394 bus-interconnected system. The synchronization signal is coupled onto a conductor of the IEEE 1394 bus by a clock master node, and received by all other nodes. The synchronization signal is coupled to the conductor in the bus without interfering with the signal, such as a power or data signal, carried by that conductor. Each node may derive its sample rate clocks using conventional time stamp means, or optionally referencing its sample rate clocks to the synchronization signal for higher performance. The format of the synchronization signal may be virtually any type of standard or non-standard work clock or longitudinal time code.