Mobile telephone ringing tone acoustic signal generator having input digital signal converted and delay line applied/memorised with two sample sets combined/memorised and forming output signal.

摘要

The acoustic signal generation system has an input (IU) providing a digital signal output (in). A delay line (DL) receives input samples memorising and delaying them. A calculation unit (AU) combines two values of digital words from the delay line forming a modified digital word which is memorised in the delay line providing the output signal (S) to the output (OU).