Speech Source Separation using Variational Autoencoder and Bandpass Filter

• Published in: IEEE access Vol. 8; p. 1
• Main Authors: Do, Hao D., Tran, Son T., Chau, Duc T.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.01.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustics; Background noise; bandpass filter; Bandpass filters; Frequency ranges; Generative model; Separation; Signal processing; Speech; Speech recognition; speech separation; Speech sounds; variational autoencoder; Verbal learning
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2020.3019495

Speech source separation is essential for speech-related applications because this process enhances the input speech signal for the main processing model. Most of the current approaches for this task focus on separating the speech of commonly high-frequency noises or a particular background sound. They cannot clear the signals which intersect with the human speech in its frequency range. To deal with this problem, we propose a hybrid approach combining a variational autoencoder (VAE) and a bandpass filter (BPF). This method can extract and enhance the speech signal in the mixture of many elements such as speech signal, the high-frequency noises, and many kinds of different background sounds which interfere with the speech sound. Experimental results showed that our model can extract effectively the speech signal with 15.02 dB in Signal to Interference Ratio (SIR) and 12.99 dB in Signal to Distortion Ratio (SDR). On the other hand, we can adjust the passband to identify the range of frequency at the output signal to apply for a particular application like gender classification.