Robust sound localization in 0.18 /spl mu/m CMOS
Robust sound localization in 0.18 /spl mu/m CMOS
复制标题
0.18 /spl mu/m CMOS 中的稳健声音定位
DOI：
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发表时间：
2005
影响因子：
5.4
通讯作者：
A. Sheikholeslami
中科院分区：
文献类型：
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作者：
D. Halupka;N. Mathai;P. Aarabi;A. Sheikholeslami
提出了一种利用两个独立麦克风采集的信息对单个声源进行定位的声源定位算法的硬件实现。这是通过估计声音在两个麦克风处的到达时间延迟(TDOA)来实现的。我们使用了一种被称为“相位变换”的时差算法来最小化来自环境的混响和噪声的影响。对所选的TDOA算法进行了简化，以便用诸如迭代加法之类的较便宜的运算来代替复杂的运算，例如余弦函数。实现该算法的定制数字信号处理器采用0.18/SPLµ/m的CMOS工艺设计，并通过了测试。该测试芯片能够利用大约30 mW的功率和6.25 mm/sup/的硅面积，将声源的方向定位在2.2/spl deg//的精度范围内。
This paper presents a hardware implementation of a sound localization algorithm that localizes a single sound source by using the information gathered by two separated microphones. This is achieved through estimating the time delay of arrival (TDOA) of sound at the two microphones. We have used a TDOA algorithm known as the "phase transform" to minimize the effects of reverberations and noise from the environment. Simplifications to the chosen TDOA algorithm were made in order to replace complex operations, such as the cosine function, with less expensive ones, such as iterative additions. The custom digital signal processor implementing this algorithm was designed in a 0.18-/spl mu/m CMOS process and tested successfully. The test chip is capable of localizing the direction of a sound source within 2.2/spl deg/ of accuracy, utilizing approximately 30 mW of power and 6.25 mm/sup 2/ of silicon area.