| 摘要 |
The present invention discloses a method and device of channel equalization and beam controlling for a digital speaker array system. The method comprises the following steps: (1) converting digital format; (2) performing channel equalization; (3)controlling beam-forming; (4) performing multi-bit £-” modulation; (5)performing thermometer code conversion; (6) performing dynamic mismatch-shaping processing; (7) extracting the channel information to send to the digital power amplifier and drive the array sound. The device of the invention comprises: a sound source, a digital converter, a channel equalizer, a beam-former, a £-” modulator, a thermometer coder, a dynamic mismatch shaper, a extraction selector, a multi-channel digital power amplifier and a speaker array, wherein each unit connects to each other serially. The invention achieves the full-digital of the system and reduces the volume, power dissipation and cost, and enhances the electro-acoustic conversion efficiency and the anti-interference ability thereof, and improves the frequency response flatness in audio band of the system, accomplishes the beam directionality control of the digital array, and provides an effective realizing way for the special sound effect. |
