Synchronization of multiroom audio streams in Wi-Fi environment

Converting audio signal to packet stream and propagating through wireless local area network (Wi-Fi technology) to loud speakers that may be located at different rooms will be a popular scenario of multimedia applications. Since the packets received by separate speakers varied with the transmission paths and environment to them, this made the playable contents different from one speaker to another and resulted in an unsynchronized play out effect. This paper proposed and designed specific mechanisms such as pre-buffering, time synchronization and retransmission to resolve the issue in order to make the play out behavior of a speaker in conformity with others.