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Speech Bandwidth Extension improves clarity and intelligibility by restoring/inferring appropriate high-frequency content for low-bandwidth speech. Existing methods often rely on spectrogram or waveform modeling, which can incur higher…

Sound · Computer Science 2026-03-04 Bowen Zhang , Junchuan Zhao , Ian McLoughlin , Ye Wang , A S Madhukumar

The majority of existing speech bandwidth extension (BWE) methods operate under the constraint of fixed source and target sampling rates, which limits their flexibility in practical applications. In this paper, we propose a multi-stage…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-05 Ye-Xin Lu , Yang Ai , Zheng-Yan Sheng , Zhen-Hua Ling

The Terahertz band is envisioned to meet the demanding 100 Gbps data rates for 6G wireless communications. Aiming at combating the distance limitation problem with low hardware-cost, ultra-massive MIMO with hybrid beamforming is promising.…

Information Theory · Computer Science 2021-06-11 Yuhang Chen , Longfei Yan , Chong Han

The rise of deep learning technologies has quickly advanced many fields, including that of generative music systems. There exist a number of systems that allow for the generation of good sounding short snippets, yet, these generated…

Sound · Computer Science 2021-04-27 Zixun Guo , Makris Dimos , Herremans Dorien

The fundamental frequency (F0) contour of speech is a key aspect to represent speech prosody that finds use in speech and spoken language analysis such as voice conversion and speech synthesis as well as speaker and language identification.…

Audio and Speech Processing · Electrical Eng. & Systems 2018-05-09 Akihiro Kato , Tomi Kinnunen

Recent studies in deep learning-based speech separation have proven the superiority of time-domain approaches to conventional time-frequency-based methods. Unlike the time-frequency domain approaches, the time-domain separation systems…

Audio and Speech Processing · Electrical Eng. & Systems 2020-03-30 Yi Luo , Zhuo Chen , Takuya Yoshioka

We have recently shown that deep Long Short-Term Memory (LSTM) recurrent neural networks (RNNs) outperform feed forward deep neural networks (DNNs) as acoustic models for speech recognition. More recently, we have shown that the performance…

Computation and Language · Computer Science 2015-07-27 Haşim Sak , Andrew Senior , Kanishka Rao , Françoise Beaufays

In practical application of speech codecs, a multitude of factors such as the quality of the radio connection, limiting hardware or required user experience necessitate trade-offs between achievable perceptual quality, engendered bitrate…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-25 Kishan Gupta , Srikanth Korse , Andreas Brendel , Nicola Pia , Guillaume Fuchs

This is the first paper in a sequence of studies in which we introduce a new type of neural networks (NNs) -- wavelet-based neural networks (WBNNs) -- and study their properties and potential for applications. We begin this study with a…

Machine Learning · Computer Science 2022-11-02 Lubomir T. Dechevsky , Kristoffer M. Tangrand

End-to-end learning models using raw waveforms as input have shown superior performances in many audio recognition tasks. However, most model architectures are based on convolutional neural networks (CNN) which were mainly developed for…

Audio and Speech Processing · Electrical Eng. & Systems 2022-09-20 Taejun Kim , Juhan Nam

Wideband Audio Waveform Evaluation Networks (WAWEnets) are convolutional neural networks that operate directly on wideband audio waveforms in order to produce evaluations of those waveforms. In the present work these evaluations give…

Audio and Speech Processing · Electrical Eng. & Systems 2023-11-21 Andrew Catellier , Stephen Voran

State-of-the-art neural network language models (NNLMs) represented by long short term memory recurrent neural networks (LSTM-RNNs) and Transformers are becoming highly complex. They are prone to overfitting and poor generalization when…

Computation and Language · Computer Science 2022-08-30 Boyang Xue , Shoukang Hu , Junhao Xu , Mengzhe Geng , Xunying Liu , Helen Meng

Weightless Neural Networks (WNNs) are a class of machine learning model which use table lookups to perform inference. This is in contrast with Deep Neural Networks (DNNs), which use multiply-accumulate operations. State-of-the-art WNN…

We present a comprehensive study of deep bidirectional long short-term memory (LSTM) recurrent neural network (RNN) based acoustic models for automatic speech recognition (ASR). We study the effect of size and depth and train models of up…

Neural and Evolutionary Computing · Computer Science 2019-08-06 Albert Zeyer , Patrick Doetsch , Paul Voigtlaender , Ralf Schlüter , Hermann Ney

In this paper, we suggest a new parallel, non-causal and shallow waveform domain architecture for speech enhancement based on FFTNet, a neural network for generating high quality audio waveform. In contrast to other waveform based…

Audio and Speech Processing · Electrical Eng. & Systems 2020-06-09 Muhammed PV Shifas , Nagaraj Adiga , Vassilis Tsiaras , Yannis Stylianou

Recent advancements in generative modeling have significantly enhanced the reconstruction of audio waveforms from various representations. While diffusion models are adept at this task, they are hindered by latency issues due to their…

Sound · Computer Science 2024-10-08 Peng Liu , Dongyang Dai , Zhiyong Wu

State-of-the-art statistical parametric speech synthesis (SPSS) generally uses a vocoder to represent speech signals and parameterize them into features for subsequent modeling. Magnitude spectrum has been a dominant feature over the years.…

Sound · Computer Science 2015-10-08 Bo Fan , Siu Wa Lee , Xiaohai Tian , Lei Xie , Minghui Dong

In this paper we propose a novel model for unconditional audio generation based on generating one audio sample at a time. We show that our model, which profits from combining memory-less modules, namely autoregressive multilayer…

The recent developments in technology have re-warded us with amazing audio synthesis models like TACOTRON and WAVENETS. On the other side, it poses greater threats such as speech clones and deep fakes, that may go undetected. To tackle…

Machine Learning · Computer Science 2021-07-27 Arun Kumar Singh , Priyanka Singh , Karan Nathwani

The recurrent neural networks (RNN) with richly distributed internal states and flexible non-linear transition functions, have overtaken the dynamic Bayesian networks such as the hidden Markov models (HMMs) in the task of modeling highly…

Machine Learning · Computer Science 2021-08-11 Jin Huang , Ming Xiao