【摘要】 主要采用TDOA算法,重点研究了基于麦克风阵列的声源定位技术。在对广义互相关时延估计算法分析的基础上,通过引入基于C₀复杂度的端点检测技术、线性预测和IIR平滑滤波,设计了基于线性预测残差的广义互相关算法。同时给出了平面四元十字麦克风阵列的设计及定位原理,完成了基于DM368的嵌入式语音定位系统设计。测试结果表明,所设计的系统有效改进了时延估计的准确性,提升了噪声环境下的定位性能。更多还原

【Abstract】 This work focuses the application of TDOA algorithm on microphone array based sound source localization.After the analysis of generalized cross-correlation phase transform( GCC-PHAT) algorithm,the GCC-PHAT algorithm based on LP residue is proposed,which adopts C0 complexity based endpoint detection technique,linear prediction( LP) and IIR smoothing filtering. A cross-array,with four microphones symmetrically located in the same plane is designed,also the source-locating equations are deduced using the estimated delay information. An embedded sound source localization system based on DM368 is designed. The test results show that the proposed system can improve the accuracy of delay estimation and enhance the performance of localization under noisy environments.更多还原