Modelling and enhancement of reverberant speech using an envelope convolution method
Modelling and enhancement of reverberant speech using an envelope convolution method
复制标题
使用包络卷积方法对混响语音进行建模和增强
DOI：
10.1109/icassp.1983.1171980
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
J. Hammond
中科院分区：
文献类型：
--
作者：
J. Mourjopoulos;J. Hammond
声环境可视为线性系统，其传播特性由其脉冲响应函数给出。在一定条件下，这一基本模型可以扩展为描述输入和输出波形包络之间的关系。这种模型是在多频带处理方案的背景下提出的，目的是增强单麦克风记录的混响语音信号。该模型的具体要求允许一种简化的方法来估计包络函数。该模型允许准确地评估混响语音的包络，即使在关于房间特征的先前信息很少的情况下也是如此。然后，在每个频带中的包络去卷积之后可以实现语音增强，这从测量的语音包络中恢复无回声信号的包络，并使用原始相位函数最终重建语音波形。
Acoustic environments can be treated as linear systems whose transmission properties are given by their impulse response functions. This basic model can be extended, under certain conditions, to describe the relationship between the envelopes of the input and output waveforms. Such a model is proposed in the context of a multiband processing scheme, aiming at the enhancement of single microphone recorded reverberant speech signals. The specific requirements of this model permit a simplified approach to the estimation of the envelope functions. The model allows accurate evaluation of the envelope of the reverberant speech, even when little prior information about the room characteristics is available. Speech enhancement can be then achieved after envelope deconvolution in each band, which recovers the envelope of the anechoic signal from the measured speech envelope, and final reconstruction of the speech waveform using the original phase function.