首页>
外国专利>
METHOD AND APPARATUS FOR DOUBLE-TALK DETECTION IN A HANDS-FREE COMMUNICATION SYSTEM
METHOD AND APPARATUS FOR DOUBLE-TALK DETECTION IN A HANDS-FREE COMMUNICATION SYSTEM
展开▼
机译:无手通信系统中双语音检测的方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
An echo canceling circuit comprising a double talk detector, an upper band signal filter configured to pass only near-end upper band signals to the double talk detector and remove lower band signals, an adaptive filter circuit, a control circuit operatively coupled to the double talk detector and to the adaptive filter circuit, and a threshold estimator configured to iteratively calculate an upper adaptive decision threshold value and a lower adaptive decision threshold value. The double talk detector declares near-end speech to be present if an estimated power level of the upper band signals exceeds the upper adaptive decision threshold value, and declares the near-end speech to be absent if the estimated power level of the upper band signals falls below the lower adaptive decision threshold value for a predetermined number of iterative cycles.
展开▼