All-digital speaker system device

摘要

The present invention disclosed an all-digital speaker system device based on multi-bit £-” Modulation, comprising an A/D converter, an interpolation filter, a £-” modulator, a dynamic mismatch regulator, a differential buffer and a speaker array. The present invention takes advantage of the £-” modulation technique to effectively reduce the cost and complexity of the hardware realization of the speaker system device, thus realizing the full digitalization of the whole sound transmission link and the integration of the system device with low power dissipation and volume. Furthermore, the system device according to the present invention is provided with a better control ability on the local sound field, thus providing a better practicable method for the voice secret transmission.