摘要
时延估计是近场声源定位领域中的一项关键技术。相位转换广义互相关时延估计方法(PHAT-GCC)由于其低的计算复杂度和易于实现的特点使得此方法在实际的被动声定位系统中得到了广泛应用。但是此方法只能在高信噪比和适度混响条件下有较好的性能。针对此问题,给出了一种修正的PHAT-GCC方法,并在不同信噪比和混响环境下与PHAT-GCC方法进行比较,仿真实验表明,修正的方法在较低信噪比下的抗混响性能有所提高。
TDE （Time Delay Estimation） is one of the key techniques in near-field acoustic source localization. The GCC（Generalized Cross Correlation） method based on a PHAT（PHAse Transform） is widely chosen for the TDE in a practical passive acoustic source localization system because of its simple algorithm, suitable for real-time implementation. However, this algorithm only gives good results under high SNR conditions and moderate reverberation environment. Aiming at this problem, a modified PHAT-GCC algorithm is proposed and compared with the PHAT-GCC algorithm under different SNR conditions and reverberation environment. The results of simulation experiment clearly demonstrate that this method presents a better anti-reverberant performance even under lower SNR conditions.
出处
《电声技术》
2010年第2期47-50,81,共5页
Audio Engineering
关键词
时延估计
近场
声源定位
广义互相关
混响
TDE
near-field
acoustic source localization
GCC
reverberation
