NDLI: Artificial bandwidth extension using deep neural network-based spectral envelope estimation and enhanced excitation estimation

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Volume 10 (2016) : Issue 3, May

Volume 10 (2016) : Issue 2, Apr

Volume 10 (2016) : Issue 1, Feb

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Artificial bandwidth extension using deep neural network-based spectral envelope estimation and enhanced excitation estimation

Content Provider	IET Digital Library
Author	Li, Yaxing Kang, Sangwon
Abstract	The authors propose a robust artificial bandwidth extension (ABE) technique to improve narrowband (NB) speech signal quality using an enhanced spectrum envelope and excitation estimation. For envelope estimation, they propose an enhanced envelope estimation method using a deep neural network with multiple layers. For excitation estimation, they use a whitened NB excitation signal that is generated by passing the excitation signal through a whitening filter. An adaptive spectral double shifting method is introduced to obtain an enhanced wideband (WB) excitation signal. The proposed ABE system is applied to the decoded output of an adaptive multi-rate (AMR) codec at 12.2 kbps. They evaluate its performance using log spectral distortion, a WB perceptual evaluation of speech quality, and a formal listening test. The objective and subjective evaluations confirm that the proposed ABE system provides better speech quality than AMR at the same bit rate.
Starting Page	422
Ending Page	427
Page Count	6
ISSN	17519675
Volume Number	10
e-ISSN	17519683
Issue Number	Issue 4, Jun (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/10/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2015.0375
Journal	IET Signal Processing
Publisher Date	2016-06-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Multirate Codec Adaptive Spectral Double Shifting Method Artificial Bandwidth Extension Deep Neural Network-based Spectral Envelope Estimation Enhanced Excitation Estimation Enhanced Spectrum Envelope Excitation Estimation Filtering Method in Signal Processing Filtering Theory Log Spectral Distortion Narrowband Speech Signal Quality Neural Computing Technique Neural Nets Perceptual Evaluation Speech And Audio Coding Speech Coding Speech Processing Technique Speech Recognition And Synthesis Speech Synthesis Whitening Filter
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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