本课题正是在这一背景下，完成数字化会议系统中音频部分的设计与实现。
In the background of this, my paper designs the audio part of the digital meeting system.
面对着一对音箱，听到在沉实浑厚的低音衬托下，中音出得那么悠扬，高音那么玲珑剔透那么空灵飘逸，心中大感舒畅。
Face of one pair of speakers, heard in the Journal against the backdrop of real, rich bass, Tenor out so melodious, exquisitely carved treble then so ethereal and elegant, heart greatly relaxed.
针对用户以任意字词连续哼唱的情况下，哼唱特征提取中音符分割、音符识别难度大的问题，提出了一种基于两级神经网络的哼唱特征提取方法。
A two-layer neural network for humming feature extraction is proposed for note segmentation and note recognition, when users sing consecutively with arbitrary words.
针对用户以任意字词连续哼唱的情况下，哼唱特征提取中音符分割、音符识别难度大的问题，提出了一种基于两级神经网络的哼唱特征提取方法。
A two-layer neural network for humming feature extraction is proposed for note segmentation and note recognition, when users sing consecutively with arbitrary words.
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