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    • 6. 发明申请
    • HANDS-FREE PUSH-TO-TALK RADIO
    • 无手柄无线电
    • WO2006068732A2
    • 2006-06-29
    • PCT/US2005041331
    • 2005-11-16
    • MOTOROLA INCLANDRON DANIEL JBEHBOODIAN ALIWONG CHIN P
    • LANDRON DANIEL JBEHBOODIAN ALIWONG CHIN P
    • G10L11/06
    • H04M1/6041G10L25/78
    • A hands-free digital push-to-talk device (102) includes a digital background noise suppressor (302), a digital voice activity detector (304), an audio buffer (306), as well as a decision handler (308), embedded inside the device's (102) digital signal processor (222). Audio is buffered until the decision handler (308) determines that speech is present on an audio stream fed to the voice activity detector (304). The decision handler (308) makes the decision by assigning weighted values to each voice activity detector (304) determination, the weighted value varying depending on the state of the device (102) and temporal distance from the present time.
    • 免提数字一键通设备(102)包括数字背景噪声抑制器(302),数字语音活动检测器(304),音频缓冲器(306)以及决策处理器(308) 嵌入设备(102)数字信号处理器(222)内部。 音频被缓冲,直到判定处理器(308)确定在馈送到语音活动检测器(304)的音频流上存在语音。 决策处理器(308)通过将加权值分配给每个语音活动检测器(304)来确定,该加权值根据设备(102)的状态和从当前时间的时间距离而变化。