华中科技大学学报（自然科学版）2024，Vol.52Issue(3)：41-46,6.DOI:10.13245/j.hust.239526
基于TDOA的双微型麦克风阵列位置校准算法
Dual-mini microphone array position calibration algorithm based on TDOA
摘要
Abstract
The dual-mini microphone array is widely used in embedded devices such as wireless earphones and hearing aids,and the problem that the position of the sub-array is not fixed affects the performance of subsequent speech signal processing.An improved array position calibration algorithm was proposed based on the time difference of arrival(TDOA)method.Local cubic spline interpolation is added to the generalized cross-correlation algorithm to improve the TDOA accuracy at low sampling rates.According to the structural characteristics of the dual-mini microphone array,an improved geometric solution method is adopted,which uses the known distance parameters inside the sub-array and avoids the time-delay estimated value with large error,thereby improving the accuracy of the array position calibration.The experimental results show that under the conditions of 10 dB signal-to-noise ratio and 48 kHz sampling rate,the improved algorithm proposed in this paper can reduce the delay estimation error by 85％and the position calibration error by 51％with the same amount of calculation.关键词
双微型麦克风阵列/到达时间差(TDOA)/阵列校准/广义互相关/采样率/三次样条插值Key words
dual-mini microphone array/time difference of arrival(TDOA)/array calibration/generalized cross-correlation/sampling rate/cubic spline interpolation分类
信息技术与安全科学引用本文复制引用
吴朝晖,蔡振宇,朱嘉俊,温治晓..基于TDOA的双微型麦克风阵列位置校准算法[J].华中科技大学学报（自然科学版）,2024,52(3):41-46,6.基金项目
珠海市产学研合作基金资助项目(ZH22017001200154PWC) （ZH22017001200154PWC）
广东省重点领域研发计划资助项目(2020B0404030005). （2020B0404030005）
