DIGITAL ACOUSTIC SYSTEM

摘要

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.

主权项

1. A digital acoustic system including a driving circuit configured to drive s number of driving elements for conversion to analog audio, the system comprising:
a modulator configured to read the s number of driving elements, to modulate a digital input signal thereby ΔΣ-modulating an n bit digital signal, to mismatch shape the n bit digital signal, and to convert the n bit digital signal to m number of digital signals; a parallel-serial converter configured to convert the m number of digital signals converted by the modulator to a serially transmitted digital signal; and a serial-parallel converter configured to convert and reconstruct the digital signal converted by parallel-serial converter to m number of digital signals; wherein the driving circuit receives the m number of digital signals reconstructed by the serial-parallel converter, drives s number of driving elements, and converts the m number of digital signals to analog audio.