Abstract
This paper presents a speech enhancement approach based on analysis–synthesis framework. An improved multi-band summary correlogram (MBSC) algorithm is proposed for pitch estimation and voiced/unvoiced (V/UV) detection. The proposed pitch detection algorithm achieves a lower pitch detection error compared with the reference algorithm. The denoising autoencoder (DAE) is applied to enhance the line spectrum frequencies (LSFs). The reconstruction loss could be decreased compare with the swallow model. The proposed approach is evaluated using the perceptual evaluation of speech quality (PESQ) and the experimental results show that the proposed approach improves the performance of speech enhancement compared with the conventional speech enhancement approach. In addition, it could be applied to parametric speech coding even at low bit rate and low signal-noise ratio (SNR) environments.
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Acknowledgments
This work is supported by the National High-Tech Research and Development Program of China(863 Program) (No.2015AA016305), the National Natural Science Foundation of China (NSFC) (No.61425017, No.61403386, No.61305003, No.61332017, No.61375027, No.61273288, No.61233009, No.61203258), the Major Program for the National Social Science Fund of China (13&ZD189) and the Integration and application of basic science data in Chinese information processing field (XXH12504-1-11).
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Liu, B., Tao, J., Wen, Z. et al. Speech Enhancement Based on Analysis–Synthesis Framework with Improved Parameter Domain Enhancement. J Sign Process Syst 82, 141–150 (2016). https://doi.org/10.1007/s11265-015-1025-1
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DOI: https://doi.org/10.1007/s11265-015-1025-1