Implementation method and device of multi-bit modulation-based digital speaker system
US9942682B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 2, 2014 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Dec 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/403
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an implementation method and a device of a multi-bit Δ-Σ modulation-based digital speaker system. The method comprises, 1) digital format converting; 2) oversampling interpolation filtering; 3) multi-bit Δ-Σ modulating; 4) thermometer coding; 5) multi-channel mismatch shaping; 6) coding format converting; 7) multi-channel digital power-amplifying; 8) driving a speaker array or a multiple voice coil speaker to sound. The device comprises: a digital input interface, an oversampling interpolation filter, a multi-bit Δ-Σ modulator, a thermometer coder, a multi-channel mismatch shaper, a coding format converter, a multi-channel digital power-amplifier, and a speaker array or a multiple voice coil speaker; each portion being connected in proper order. The present invention can achieve a high-power output under a low-voltage power supply, save power consumption, implement a single-chip integration of a multi-channel reproducing system, reduce the volume and weight of the system and the implementing cost, and improve the quality of the reproduced sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.