arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.09586eess.AScs.CLcs.SD
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PickNet:Ad Hoc麦克风阵列的实时信道选择

PickNet: Real-Time Channel Selection for Ad Hoc Microphone Arrays

Microsoft(微软)

Takuya Yoshioka, Xiaofei Wang, Dongmei Wang

摘要:

本文提出了PickNet,一个神经网络模型的实时通道选择的ad hoc麦克风阵列组成的多个记录设备,如手机。假设在每个时间点最多有一个人是语音活跃的,PickNet通过使用仅数百毫秒的短频谱补丁来识别每个时间帧在空间上最接近活跃人员的设备。该模型应用于每个时间帧,并且来自所选麦克风的短时间帧信号跨帧级联以产生输出信号。由于个人设备通常靠近其所有者,因此输出信号预期平均具有比输入信号更高的信噪比和直达混响比。由于PickNet在每个时间帧仅利用有限的声学背景,因此使用所提出的模型的系统实时工作,并且对声学条件的变化具有鲁棒性。通过使用用各种智能手机获得的真实对话录音进行基于语音识别的评估。所提出的模型产生了显着的增益字错误率与有限的计算成本系统使用块在线波束形成器和一个单一的远程麦克风。

英文摘要:

This paper proposes PickNet, a neural network model for real-time channel selection for an ad hoc microphone array consisting of multiple recording devices like cell phones. Assuming at most one person to be vocally active at each time point, PickNet identifies the device that is spatially closest to the active person for each time frame by using a short spectral patch of just hundreds of milliseconds. The model is applied to every time frame, and the short time frame signals from the selected microphones are concatenated across the frames to produce an output signal. As the personal devices are usually held close to their owners, the output signal is expected to have higher signal-to-noise and direct-to-reverberation ratios on average than the input signals. Since PickNet utilizes only limited acoustic context at each time frame, the system using the proposed model works in real time and is robust to changes in acoustic conditions. Speech recognition-based evaluation was carried out by using real conversational recordings obtained with various smartphones. The proposed model yielded significant gains in word error rate with limited computational cost over systems using a block-online beamformer and a single distant microphone.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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