All-digital speaker system device

An all-digital speaker system device, comprises:

• an A/D converter for converting the input analog audio signals into high-bit digital signals in PCM coded format;
• an interpolation filter for up-sampling, which is electrically coupled to the output end of the A/D converter;
• a Σ-Δ modulator for modulating the multi-bit Σ-Δ code and shaping noise, which is electrically coupled to the output end of the interpolation filter;
• a dynamic mismatch regulator, that takes advantage of the element selection algorithm to shape a nonlinear harmonic distortion arisen from the frequency response difference between array elements to reduce the magnitude of the harmonic distortion components in band and push the power thereof to the high frequency section out of band, the dynamic mismatch regulator being electrically coupled to the output end of the Σ-Δ modulator;
• a differential buffer for enhancing the load driving ability of the output end, which is electrically coupled to the output end of the dynamic mismatch regulator;
• and
• a speaker array or realizing electro-acoustic conversion, which is electrically coupled to the output end of the differential buffer.