Fecha de publicación: 26/06/2015 Fuente: Wipo "digitalization" Provided is a digital acoustic system comprising: a ΔΣ modulator that modulates a digital input signal and outputs a digital signal; a post filter that is connected to the ΔΣ modulator and which performs mismatch shaping to convert the digital signal; a parallel serial converter that converts the digital signal converted by the post filter into a digital signal which is serially transmitted; a serial parallel converter that restores the digital signal converted by the parallel serial converter; and a drive circuit which receives the digital signal restored by the serial parallel converter and drives drive elements to convert the signal into an analog audio signal.