SYSTEM FOR SIGNAL BROADCASTING IN A WIRELESS LOUDSPEAKER NETWORK

摘要

The system of the invention includes a master device (10) and at least one slave device (20). Each device includes wireless transmission and interfacing means (12, 22), a digital processor (14, 24) and a clock (16, 26). The master device transmits signals at a frequency defined by the clock (16) thereof. The slave device includes means for determining the frequency shift between the clocks and for correcting accordingly, at an internal level, the rate of the signals sent to the processor. On the slave side the frequency of the external clock (26) can be controlled around its nominal value, and a means is provided for extracting the frequency shift value from a register (50) and for adjusting in response the frequency of the second clock so as to minimise said shift. The processor (24) of the slave device can thus operate in a synchronous manner with the clocking of the signals transmitted by wireless link, as restored by the interfacing circuit after correction at the internal level of the signal rate.