| 摘要 |
A system of domestic audio-visual apparatuses (10-18) are connected on a one-to-one basis (20-26) for the exchange of video and audio signals. The apparatuses are also connected to a serial data bus (28,D2B) which allows distributed control messages to be sent and received by the apparatuses (addressable as 'devices') and elements of the apparatuses (subdevices). No apparatus has knowledge of the complete system of connections (20-26). An autonomous process (100, 102, 104, 110') can be initiated whereby a signal path from a source subdevice (64) to a destination subdevice (62) is identified step by step using the local knowledge of each apparatus. The speed of this process can be improved by initiating (101) a concurrent second autonomous process (106') whereby a signal path is identified from a third subdevice (42) to the destination subdevice. If the first autonomous process arrives at the third subdevice (42), the first process can be terminated (at *) and its identified signal path appended to that identified by the second autonomous process.
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