摘要
设计了一种用于视频监控的具有较强抗干扰能力的特定声定位实时系统。本系统利用广义互相关算法(GCC)估计声音到达2个传声器的时间差(TDoA),以此计算声源的方向角。本系统具有特定声检测功能,只有特定声出现时才输出定位结果,提高了系统的抗干扰能力。实验证明,该系统能够实时地对枪声进行定位,当枪声在±30°范围的时候,室内测试的定位误差在±3°以内;室外测试定位误差在±5°以内。
A method to localize specific sound on real time DSP system with strong anti-interference ability is proposed. This method employs Generalized Cross Correlation （GCC） to estimate the Time Delay of Arrival （TDoA） and then gets the azimuth of sound source. At the same time, classifier is used to pick out specific sound. Only if the specific sound is detected, the system exports the estimated azimuth. That is the anti-interference ability of non-specific sound. The testing results of angle deviation are less than ±3 degree in the reverberation field and less than ±5 degree in the free field.
出处
《电视技术》
北大核心
2010年第1期81-84,共4页
Video Engineering
